Imports System.Windows.Forms
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.IO
Imports System.Text.Json
Imports System.Text.Json.Serialization
Imports System.Linq
Imports System.ComponentModel
Imports System.Reflection
Imports System.ComponentModel.Design

Public Class FrmDesigner
    Inherits Form

#Region " Variables "
    Private draggedSelectionCellX As Integer
    Private draggedSelectionCellY As Integer

    Private Const MaxRecentFiles As Integer = 10
    Private recentFiles As New List(Of String)()
    Private recentFilesFilePath As String = Path.Combine(GetProjectDirectory(), "recent_files.txt")

    Private lastMouseMoveTime As DateTime = DateTime.MinValue
    Private Const DEBOUNCE_INTERVAL As Integer = 50 ' milliseconds

    Public gameTriggers As New List(Of GameTrigger)
    Public Event ObjectSelected(selectedObject As SelectedObject)
    Public Property SelectionMode As Boolean
    Public Property SelectionRequestedByForm As Form
    Public Property SelectionRequestedFor As String

    Private Const INDENT As Integer = 20
    Friend SQCOUNTX As Integer = 16
    Friend SQCOUNTY As Integer = 11
    Private Const WALL_THICKNESS As Integer = 10

    Friend wallsHatchStyle As HatchStyle = HatchStyle.LargeConfetti
    Friend wallsColor1 As Color = Color.FromArgb(255, 0, 0, 0)
    Friend wallsColor2 As Color = Color.FromArgb(255, 64, 0, 0)
    Friend floorsHatchStyle As HatchStyle = HatchStyle.Divot
    Friend floorsColor1 As Color = Color.FromArgb(255, 64, 0, 0)
    Friend floorsColor2 As Color = Color.FromArgb(255, 0, 64, 0)

    Friend floorsUseEdgeStyle()() As Boolean 'track edge style usage

    Private SQSizeX As Integer
    Private SQSizeY As Integer

    Private highlightedX As Integer
    Private highlightedY As Integer
    Private highlightedWallX As Boolean = False
    Private highlightedWallY As Boolean = False
    Private highlightColor As Color = Color.Black
    Private highlightTimer As Timer

    Private isRestoringState As Boolean = False
    Private isActionInProgress As Boolean = False
    Private undoStack As New Stack(Of RoomState)
    Private redoStack As New Stack(Of RoomState)

    Private ReadOnly projectDir As String = GetProjectDirectory()
    Private ReadOnly premadesFolder As String = Path.Combine(projectDir, "Data", "Premades")
    Private ReadOnly savesFolder As String = Path.Combine(projectDir, "Data", "Saves")
    Private ReadOnly musicFolder As String = Path.Combine(projectDir, "Data", "Sound/Music")
    Private currentFilePath As String = ""
    Friend SelectedMusic As String = ""

    Friend verticalWalls()() As Boolean
    Friend horizontalWalls()() As Boolean

    Friend placedItems()() As PlacedItem
    Friend verticalWallItems()() As PlacedItem
    Friend horizontalWallItems()() As PlacedItem

    Private animatedImages As New List(Of Image)
    Private animationTimer As Timer

    Private isDraggingItem As Boolean = False
    Private draggedItem As PlacedItem = Nothing
    Private draggedItemIsWall As Boolean = False
    Private draggedItemIsVerticalWall As Boolean = False
    Private draggedItemOriginalX As Integer
    Private draggedItemOriginalY As Integer

    Private mouseX As Integer
    Private mouseY As Integer

    Private rand As New Random()

    Private rightMouseDownPosition As Point
    Private rightMouseDownTime As DateTime
    Private Const CLICK_DRAG_THRESHOLD As Integer = 5 ' pixels
    Private Const CLICK_DRAG_THRESHOLD_SQUARED As Integer = CLICK_DRAG_THRESHOLD * CLICK_DRAG_THRESHOLD

    Public useGradient As Boolean = False
#End Region

#Region " Constructor and Initialization "
    Public Sub New()
        InitializeComponent()
        InitializeWalls()
        InitializeTimers()
        InitializeEventHandlers()
        LoadPremades()
        LoadMusic()
        InitializeAnimationForImages()
        If Not isRestoringState Then SaveStateForUndo()
        Me.KeyPreview = True

        ' Enable double buffering for picGame
        EnableDoubleBuffering(picGame)
    End Sub

    Private Sub FrmDesigner_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        RemoveHandler cboX.SelectedIndexChanged, AddressOf CboX_SelectedIndexChanged
        RemoveHandler cboY.SelectedIndexChanged, AddressOf CboX_SelectedIndexChanged

        If cboX.Items.Contains(SQCOUNTX.ToString()) Then
            cboX.SelectedItem = SQCOUNTX.ToString()
        End If
        If cboY.Items.Contains(SQCOUNTY.ToString()) Then
            cboY.SelectedItem = SQCOUNTY.ToString()
        End If

        AddHandler cboX.SelectedIndexChanged, AddressOf CboX_SelectedIndexChanged
        AddHandler cboY.SelectedIndexChanged, AddressOf CboX_SelectedIndexChanged

        ' Ensure one of the radio buttons is checked
        rdoWalls.Checked = True

        ' Initialize the color pickers with the current colors
        colPattern.SelectedColor = wallsColor1
        colBackground.SelectedColor = wallsColor2

        LoadMusic()
        LoadPremades()
        LoadRecentFiles()

        UpdateSelections()
    End Sub

    Friend Sub InitializeWalls()
        verticalWalls = New Boolean(SQCOUNTX)() {}
        verticalWallItems = New PlacedItem(SQCOUNTX)() {}
        For x As Integer = 0 To SQCOUNTX
            verticalWalls(x) = New Boolean(SQCOUNTY - 1) {}
            verticalWallItems(x) = New PlacedItem(SQCOUNTY - 1) {}
            For y As Integer = 0 To SQCOUNTY - 1
                verticalWalls(x)(y) = True
                verticalWallItems(x)(y) = Nothing
            Next
        Next

        horizontalWalls = New Boolean(SQCOUNTX - 1)() {}
        horizontalWallItems = New PlacedItem(SQCOUNTX - 1)() {}
        For x As Integer = 0 To SQCOUNTX - 1
            horizontalWalls(x) = New Boolean(SQCOUNTY) {}
            horizontalWallItems(x) = New PlacedItem(SQCOUNTY) {}
            For y As Integer = 0 To SQCOUNTY
                horizontalWalls(x)(y) = True
                horizontalWallItems(x)(y) = Nothing
            Next
        Next

        placedItems = New PlacedItem(SQCOUNTX - 1)() {}
        For x As Integer = 0 To SQCOUNTX - 1
            placedItems(x) = New PlacedItem(SQCOUNTY - 1) {}
            For y As Integer = 0 To SQCOUNTY - 1
                placedItems(x)(y) = Nothing
            Next
        Next

        floorsUseEdgeStyle = New Boolean(SQCOUNTX - 1)() {}
        For x As Integer = 0 To SQCOUNTX - 1
            floorsUseEdgeStyle(x) = New Boolean(SQCOUNTY - 1) {}
            For y As Integer = 0 To SQCOUNTY - 1
                floorsUseEdgeStyle(x)(y) = False
            Next
        Next
    End Sub

    Private Sub InitializeTimers()
        highlightTimer = New Timer() With {.Interval = 500}
        AddHandler highlightTimer.Tick, AddressOf HighlightTimer_Tick
        highlightTimer.Start()

        animationTimer = New Timer() With {.Interval = 100} ' Update every 100 milliseconds (10 times per second)
        AddHandler animationTimer.Tick, AddressOf OnAnimationTick
        animationTimer.Start()
    End Sub

    Private Sub InitializeEventHandlers()
        picGame.AllowDrop = True

        For Each ctl As Control In tabFloor1.Controls
            If TypeOf ctl Is PictureBox Then
                AddHandler ctl.MouseEnter, AddressOf PictureBox_MouseEnter
                AddHandler ctl.MouseLeave, AddressOf PictureBox_MouseLeave
            End If
        Next

        For Each ctl As Control In tabFloor2.Controls
            If TypeOf ctl Is PictureBox Then
                AddHandler ctl.MouseEnter, AddressOf PictureBox_MouseEnter
                AddHandler ctl.MouseLeave, AddressOf PictureBox_MouseLeave
            End If
        Next

        For Each ctl As Control In tabWalls.Controls
            If TypeOf ctl Is PictureBox Then
                AddHandler ctl.MouseEnter, AddressOf PictureBox_MouseEnter
                AddHandler ctl.MouseLeave, AddressOf PictureBox_MouseLeave
            End If
        Next
    End Sub

    Private Sub InitializeAnimationForImages()
        animatedImages.Add(picBaddy1.Image)
        animatedImages.Add(picBaddy2.Image)
        animatedImages.Add(picBaddy3.Image)
        animatedImages.Add(picBaddy4.Image)
        animatedImages.Add(picLazer1.Image)
        animatedImages.Add(picLazer2.Image)
        animatedImages.Add(picFlipper1.Image)
        animatedImages.Add(picFlipper2.Image)
        animatedImages.Add(picFlipper3.Image)
        animatedImages.Add(picFlipper4.Image)
        animatedImages.Add(picCoin.Image)
        animatedImages.Add(picGate.Image)
        animatedImages.Add(picKey.Image)
        animatedImages.Add(picStart.Image)
        animatedImages.Add(picFinish.Image)
        animatedImages.Add(picBall.Image)
        animatedImages.Add(picBomb.Image)
        animatedImages.Add(picWarp.Image)
        animatedImages.Add(picWarp2.Image)

        For Each img In animatedImages
            If img IsNot Nothing Then
                ImageAnimator.Animate(img, AddressOf OnFrameChanged)
            End If
        Next
    End Sub
#End Region

#Region " Event Handlers "
    Private Sub LoadPremades()
        If Not Directory.Exists(premadesFolder) Then Directory.CreateDirectory(premadesFolder)
        lstPremades.Items.Clear()
        For Each file As String In Directory.GetFiles(premadesFolder, "*.Premade")
            lstPremades.Items.Add(Path.GetFileNameWithoutExtension(file))
        Next
    End Sub

    Private Sub LoadMusic()
        If Not Directory.Exists(musicFolder) Then
            Directory.CreateDirectory(musicFolder)
        End If

        Dim allowedExtensions As String() = {".mp3", ".wav"}
        Dim musicFileFound As Boolean = False
        Dim defaultMusicFile As String = Path.Combine(musicFolder, "The Jolly Drummer.wav")
        Dim defaultVolume As Integer = 100
        Dim defaultGain As Integer = 5

        For Each file As String In Directory.GetFiles(musicFolder)
            Dim extension As String = Path.GetExtension(file).ToLower()
            If allowedExtensions.Contains(extension) Then
                Dim fileNameWithoutExtension As String = Path.GetFileNameWithoutExtension(file)
                Dim volume As Integer = 50
                Dim gain As Integer = 10

                SelectedMusic = String.Format("{0}, V:{1}, G:{2}", file, volume, gain)
                lblAudio.Text = String.Format("{0}, V:{1}, G:{2}", fileNameWithoutExtension, volume, gain)

                musicFileFound = True
                Exit For
            End If
        Next

        If Not musicFileFound Then
            ' Set default music file, volume, and gain
            SelectedMusic = String.Format("{0}, V:{1}, G:{2}", defaultMusicFile, defaultVolume, defaultGain)
            lblAudio.Text = String.Format("{0}, V:{1}, G:{2}", Path.GetFileNameWithoutExtension(defaultMusicFile), defaultVolume, defaultGain)
        End If
    End Sub

    Private Sub OnAnimationTick(sender As Object, e As EventArgs)
        For Each img In animatedImages
            ImageAnimator.UpdateFrames(img)
        Next
        picGame.Invalidate()
    End Sub

    Private Sub OnFrameChanged(o As Object, e As EventArgs)
    End Sub

    Private Sub HighlightTimer_Tick(sender As Object, e As EventArgs)
        highlightColor = If(highlightColor = Color.Black, Color.White, Color.Black)
        picGame.Invalidate()
    End Sub

    Private Function IsVerticalWallOuterBorder(x As Integer) As Boolean
        Return x = 0 OrElse x = SQCOUNTX
    End Function

    Private Function IsHorizontalWallOuterBorder(y As Integer) As Boolean
        Return y = 0 OrElse y = SQCOUNTY
    End Function

    Private Function GetItemName(imageKey As String) As String
        Select Case imageKey
            Case "picBlock1"
                Return "Block"
            Case "picBaddy1"
                Return "Baddy1"
            Case "picBaddy2"
                Return "Baddy2"
            Case "picLazer1"
                Return "Lazer1"
            Case "picLazer2"
                Return "Lazer2"
            Case "picFlipper1"
                Return "Flipper1"
            Case "picFlipper2"
                Return "Flipper2"
            Case "picFlipper3"
                Return "Flipper3"
            Case "picFlipper4"
                Return "Flipper4"
            Case "picBaddy3"
                Return "Baddy3"
            Case "picBaddy4"
                Return "Baddy4"
            Case "picCoin"
                Return "Coin"
            Case "picGate"
                Return "Gate"
            Case "picKey"
                Return "Key"
            Case "picStart"
                Return "Start"
            Case "picFinish"
                Return "Finish"
            Case "picBlockStopper1"
                Return "BlockStopper"
            Case "picBall"
                Return "Ball"
            Case "picBlockSwitch"
                Return "BlockSwitch"
            Case "picBomb"
                Return "Bomb"
            Case "picWarp"
                Return "Warp"
            Case "picWarp2"
                Return "Warp2"
            Case Else
                Return "Unknown"
        End Select
    End Function

    Private Sub RemoveEdgeStyleAtMousePosition(mouseX As Integer, mouseY As Integer)
        UpdateHighlight(mouseX, mouseY)
        If Not highlightedWallX AndAlso Not highlightedWallY Then
            If highlightedX >= 0 AndAlso highlightedX < SQCOUNTX AndAlso highlightedY >= 0 AndAlso highlightedY < SQCOUNTY Then
                floorsUseEdgeStyle(highlightedX)(highlightedY) = False
                picGame.Invalidate()
            End If
        End If
    End Sub

    Private Function IsLazerItem(imgKey As String) As Boolean
        Return imgKey = "picLazer1" OrElse imgKey = "picLazer2"
    End Function

    Public Sub UpdateGridSizeUI()
        RemoveHandler cboX.SelectedIndexChanged, AddressOf CboX_SelectedIndexChanged
        RemoveHandler cboY.SelectedIndexChanged, AddressOf CboX_SelectedIndexChanged

        If Not cboX.Items.Contains(SQCOUNTX.ToString()) Then
            cboX.Items.Add(SQCOUNTX.ToString())
        End If
        cboX.SelectedItem = SQCOUNTX.ToString()

        If Not cboY.Items.Contains(SQCOUNTY.ToString()) Then
            cboY.Items.Add(SQCOUNTY.ToString())
        End If
        cboY.SelectedItem = SQCOUNTY.ToString()

        AddHandler cboX.SelectedIndexChanged, AddressOf CboX_SelectedIndexChanged
        AddHandler cboY.SelectedIndexChanged, AddressOf CboX_SelectedIndexChanged

        CalculateSquareSizes(picGame.ClientSize.Width, picGame.ClientSize.Height)

        picGame.Invalidate()
    End Sub

#End Region

#Region " File "
    Private Sub MnuNew_Click(sender As Object, e As EventArgs) Handles mnuNew.Click, btnNew.Click
        If Not isRestoringState Then SaveStateForUndo()
        wallsHatchStyle = HatchStyle.Cross
        wallsColor1 = Color.Gray
        wallsColor2 = Color.DarkGray
        floorsHatchStyle = HatchStyle.SmallCheckerBoard
        floorsColor1 = Color.LightGray
        floorsColor2 = Color.White
        InitializeWalls()
        currentFilePath = ""

        txtName.Text = ""
        SelectedMusic = ""

        UpdateSelections()

        picGame.Invalidate()
    End Sub

    Private Sub MnuSave_Click(sender As Object, e As EventArgs) Handles mnuSave.Click, btnSave.Click
        If String.IsNullOrEmpty(currentFilePath) Then
            MnuSaveAs_Click(sender, e)
        Else
            SaveRoomToFile(currentFilePath)
        End If
    End Sub

    Private Sub MnuSaveAs_Click(sender As Object, e As EventArgs) Handles mnuSaveAs.Click
        ' Create and configure the SaveFileDialog
        Dim saveDialog As New SaveFileDialog() With {
    .InitialDirectory = savesFolder, ' Set initial directory to the project directory
    .Filter = "Room Files (*.room)|*.room",
    .DefaultExt = "room",
    .AddExtension = True,
    .Title = "Save Room As"
}

        ' Show the dialog and check if the user clicked OK
        If saveDialog.ShowDialog() = DialogResult.OK Then
            ' Save the current room data to the specified file
            SaveRoomToFile(saveDialog.FileName)

            ' Update the current file path
            currentFilePath = saveDialog.FileName

            ' Update recent files list
            UpdateRecentFiles(currentFilePath) ' Update recent files with the new save
        End If
    End Sub

    Private Sub MnuLoad_Click(sender As Object, e As EventArgs) Handles mnuLoad.Click, btnOpen.Click
        Dim openDialog As New OpenFileDialog() With {
    .InitialDirectory = savesFolder,
    .Filter = "Room Files (*.room)|*.room",
    .DefaultExt = "room",
    .AddExtension = True,
    .Title = "Load Room"
}

        If openDialog.ShowDialog() = DialogResult.OK Then
            If Not isRestoringState Then SaveStateForUndo()
            LoadRoomFromFile(openDialog.FileName)

            UpdateRecentFiles(openDialog.FileName) ' Update recent files

            currentFilePath = openDialog.FileName
            UpdateGridSizeUI()
            UpdateSelections()
            picGame.Invalidate()
        End If
    End Sub

    Private Sub UpdateRecentFiles(filePath As String)
        ' Remove the file if it already exists in the recent files list
        recentFiles.Remove(filePath)

        ' Add the new file to the top of the list
        recentFiles.Insert(0, filePath)

        ' Ensure we do not exceed the maximum number of recent files
        If recentFiles.Count > MaxRecentFiles Then
            recentFiles.RemoveAt(MaxRecentFiles) ' Remove the oldest entry
        End If

        ' Update the menu with the latest recent files
        UpdateRecentFilesMenu()

        ' Save the recent files to a text file
        SaveRecentFilesToFile()
    End Sub

    Private Sub UpdateRecentFilesMenu()
        ' Remove any existing recent file items and separators
        For i As Integer = mnu.DropDownItems.Count - 1 To 0 Step -1
            Dim item As ToolStripItem = mnu.DropDownItems(i)
            If TypeOf item Is ToolStripMenuItem AndAlso (CType(item, ToolStripMenuItem).Tag IsNot Nothing AndAlso CType(item, ToolStripMenuItem).Tag.ToString() = "RecentFile") OrElse
   TypeOf item Is ToolStripSeparator Then
                mnu.DropDownItems.RemoveAt(i)
            End If
        Next

        ' Find the "New" menu item
        Dim newMenuItem As ToolStripMenuItem = Nothing
        For Each item As ToolStripItem In mnu.DropDownItems
            If TypeOf item Is ToolStripMenuItem AndAlso CType(item, ToolStripMenuItem).Text = "New" Then
                newMenuItem = CType(item, ToolStripMenuItem)
                Exit For
            End If
        Next

        If newMenuItem Is Nothing Then
            MessageBox.Show("New menu item not found.")
            Return
        End If

        ' Add the separator below the "New" menu item
        Dim separatorBelowNew As New ToolStripSeparator()
        mnu.DropDownItems.Insert(mnu.DropDownItems.IndexOf(newMenuItem) + 1, separatorBelowNew)

        ' Find the "Load" menu item
        Dim loadMenuItem As ToolStripMenuItem = Nothing
        For Each item As ToolStripItem In mnu.DropDownItems
            If TypeOf item Is ToolStripMenuItem AndAlso CType(item, ToolStripMenuItem).Text = "Load" Then
                loadMenuItem = CType(item, ToolStripMenuItem)
                Exit For
            End If
        Next

        If loadMenuItem Is Nothing Then
            MessageBox.Show("Load menu item not found.")
            Return
        End If

        ' Add the separator above the "Load" menu item
        Dim separatorAboveLoad As New ToolStripSeparator()
        mnu.DropDownItems.Insert(mnu.DropDownItems.IndexOf(loadMenuItem), separatorAboveLoad)

        ' Add the separator above recent files
        Dim separatorAboveRecents As New ToolStripSeparator()
        mnu.DropDownItems.Insert(mnu.DropDownItems.IndexOf(loadMenuItem) + 1, separatorAboveRecents)

        ' Populate the recent files list in the menu in reverse order
        For i As Integer = recentFiles.Count - 1 To 0 Step -1
            Dim file As String = recentFiles(i)
            Dim menuItem As New ToolStripMenuItem(file) ' Create a new menu item for each file
            menuItem.Tag = "RecentFile" ' Tag the item to identify it as a recent file item
            AddHandler menuItem.Click, AddressOf RecentFileMenuItem_Click ' Attach event handler
            mnu.DropDownItems.Insert(mnu.DropDownItems.IndexOf(separatorAboveRecents) + 1, menuItem) ' Add item to the dropdown after the separator
        Next

        ' Add the separator below recent files
        Dim separatorBelowRecents As New ToolStripSeparator()
        mnu.DropDownItems.Insert(mnu.DropDownItems.IndexOf(separatorAboveRecents) + recentFiles.Count + 1, separatorBelowRecents)

        ' Ensure the Exit menu item is added only once
        Dim exitMenuItem As ToolStripMenuItem = Nothing
        For Each item As ToolStripItem In mnu.DropDownItems
            If TypeOf item Is ToolStripMenuItem AndAlso CType(item, ToolStripMenuItem).Text = "Exit" Then
                exitMenuItem = CType(item, ToolStripMenuItem)
                Exit For
            End If
        Next

        If exitMenuItem Is Nothing Then
            exitMenuItem = New ToolStripMenuItem("Exit")
            AddHandler exitMenuItem.Click, AddressOf ExitMenuItem_Click

            ' Load the icon
            Dim iconPath As String = Path.Combine(projectDir, "Data", "Icons", "close.png")
            If File.Exists(iconPath) Then
                exitMenuItem.Image = Image.FromFile(iconPath)
            End If

            mnu.DropDownItems.Insert(mnu.DropDownItems.IndexOf(separatorBelowRecents) + 1, exitMenuItem)
        End If

        ' Hide the separators if there are no recent files
        separatorAboveRecents.Visible = recentFiles.Count > 0
        separatorBelowRecents.Visible = recentFiles.Count > 0
    End Sub

    Private Sub ExitMenuItem_Click(sender As Object, e As EventArgs)
        Me.Close()
    End Sub

    Private Sub SaveRecentFilesToFile()
        Try
            Dim lines As New List(Of String)(recentFiles)
            File.WriteAllLines(recentFilesFilePath, lines)
        Catch ex As Exception
            MessageBox.Show("Error saving recent files: " & ex.Message)
        End Try
    End Sub
    Private Sub LoadRecentFiles()
        If File.Exists(recentFilesFilePath) Then
            Try
                Dim lines As String() = File.ReadAllLines(recentFilesFilePath)
                recentFiles.AddRange(lines.Where(Function(line) Not String.IsNullOrWhiteSpace(line)).Take(MaxRecentFiles))
            Catch ex As Exception
                MessageBox.Show("Error loading recent files: " & ex.Message)
            End Try
        End If
        UpdateRecentFilesMenu()
    End Sub
    Private Sub RecentFileMenuItem_Click(sender As Object, e As EventArgs)
        Dim selectedItem As ToolStripMenuItem = CType(sender, ToolStripMenuItem)
        Dim filePath As String = selectedItem.Text

        ' Load the selected recent file
        LoadRoomFromFile(filePath)

        ' Update the current file path
        currentFilePath = filePath

        ' Update the recent files list with the selected file
        UpdateRecentFiles(filePath)
    End Sub

    Private Sub LoadSettingsFromFile(filePath As String)
        Try
            If Not File.Exists(filePath) Then Return
            Dim lines As String() = File.ReadAllLines(filePath)
            Dim section As String = ""
            For Each line As String In lines
                line = line.Trim()
                If String.IsNullOrEmpty(line) OrElse line.StartsWith(";"c) Then Continue For
                If line.StartsWith("[") AndAlso line.EndsWith("]") Then
                    section = line.Substring(1, line.Length - 2)
                Else
                    Dim parts() As String = line.Split(New Char() {":"c}, 2)
                    If parts.Length = 2 Then
                        LoadProperty(parts(0).Trim(), parts(1).Trim(), section)
                    End If
                End If
            Next

            UpdateSelections()
        Catch ex As Exception
            MessageBox.Show("Error loading settings: " & ex.Message)
        End Try
    End Sub
    Private Sub LoadProperty(key As String, value As String, section As String)
        Dim isWall As Boolean = (section = "Walls")
        Select Case key
            Case "HatchStyle"
                Dim hatchStyle As HatchStyle
                If [Enum].TryParse(value, hatchStyle) Then
                    If isWall Then wallsHatchStyle = hatchStyle Else floorsHatchStyle = hatchStyle
                End If
            Case "Color1"
                Dim color As Color = ParseColor(value)
                If isWall Then wallsColor1 = color Else floorsColor1 = color
            Case "Color2"
                Dim color As Color = ParseColor(value)
                If isWall Then wallsColor2 = color Else floorsColor2 = color
        End Select
    End Sub
    Private Sub SaveSettingsToFile(filePath As String)
        Try
            Using sw As New StreamWriter(filePath)
                sw.WriteLine("[Walls]")
                sw.WriteLine("HatchStyle: " & wallsHatchStyle.ToString())
                sw.WriteLine("Color1: " & ColorToString(wallsColor1))
                sw.WriteLine("Color2: " & ColorToString(wallsColor2))
                sw.WriteLine()
                sw.WriteLine("[Floors]")
                sw.WriteLine("HatchStyle: " & floorsHatchStyle.ToString())
                sw.WriteLine("Color1: " & ColorToString(floorsColor1))
                sw.WriteLine("Color2: " & ColorToString(floorsColor2))
            End Using
        Catch ex As Exception
            MessageBox.Show("Error saving settings: " & ex.Message)
        End Try
    End Sub

    Public Sub SaveRoomToFile(filePath As String)
        Try
            Dim currentState As New RoomData(Me)

            Dim options As New JsonSerializerOptions With {
    .IncludeFields = True,
    .WriteIndented = True
}
            Dim jsonString As String = JsonSerializer.Serialize(currentState, options)

            File.WriteAllText(filePath, jsonString)
        Catch ex As Exception
            MessageBox.Show("Error saving room: " & ex.Message)
        End Try
    End Sub

    Private Sub LoadRoomFromFile(filePath As String)
        Try
            If Not File.Exists(filePath) Then Return

            Dim options As New JsonSerializerOptions With {
    .IncludeFields = True
}
            Dim jsonString As String = File.ReadAllText(filePath)
            Dim roomData As RoomData = JsonSerializer.Deserialize(Of RoomData)(jsonString, options)

            If roomData Is Nothing Then
                MessageBox.Show("Error: Failed to deserialize room data.")
                Return
            End If

            isRestoringState = True
            roomData.RestoreState(Me)
            isRestoringState = False

            UpdateSelections()

            If roomData.useGradient Then
                cboStyleChoice.SelectedIndex = cboStyleChoice.Items.IndexOf("Gradient")
            Else
                cboStyleChoice.SelectedIndex = cboStyleChoice.Items.IndexOf("HatchStyle")
            End If

            Me.Text = filePath

            ' Update the audio label with the selected music
            Dim selectedMusicParts As String() = SelectedMusic.Split(New String() {", V:", ", G:"}, StringSplitOptions.None)
            If selectedMusicParts.Length = 3 Then
                Dim audioFile As String = selectedMusicParts(0).Trim()
                Dim volume As Integer = Integer.Parse(selectedMusicParts(1).Trim())
                Dim gain As Integer = Integer.Parse(selectedMusicParts(2).Trim())
                Dim fileNameWithoutExtension As String = Path.GetFileNameWithoutExtension(audioFile)
                lblAudio.Text = String.Format("{0}, V:{1}, G:{2}", fileNameWithoutExtension, volume, gain)
            End If

        Catch ex As Exception
            MessageBox.Show("Error loading room: " & ex.Message)
        End Try
    End Sub

#End Region

#Region " Design "
    Private Sub LstPremades_SelectedIndexChanged(sender As Object, e As EventArgs) Handles lstPremades.SelectedIndexChanged
        If lstPremades.SelectedIndex >= 0 Then
            If Not isRestoringState Then SaveStateForUndo()
            Dim selectedPremade As String = lstPremades.SelectedItem.ToString()
            LoadSettingsFromFile(Path.Combine(premadesFolder, selectedPremade & ".Premade"))
            UpdateSelections()
            picGame.Invalidate()
        End If
    End Sub

    Private Sub BtnSavePremade_Click(sender As Object, e As EventArgs) Handles btnSavePremade.Click
        Dim saveDialog As New SaveFileDialog() With {
            .InitialDirectory = premadesFolder,
            .Filter = "Premade Files (*.Premade)|*.Premade",
            .DefaultExt = "Premade",
            .AddExtension = True,
            .Title = "Save Premade"
        }
        If saveDialog.ShowDialog() = DialogResult.OK Then
            SaveSettingsToFile(saveDialog.FileName)
            LoadPremades()
        End If
    End Sub

    Private Sub LstHatchstyles_SelectedIndexChanged(sender As Object, e As EventArgs) Handles lstHatchstyles.SelectedIndexChanged
        If lstHatchstyles.SelectedItem IsNot Nothing Then
            Dim selectedHatchStyleName As String = lstHatchstyles.SelectedItem.ToString()
            Dim selectedHatchStyle As HatchStyle = CType([Enum].Parse(GetType(HatchStyle), selectedHatchStyleName), HatchStyle)
            If rdoFloors.Checked Then
                floorsHatchStyle = selectedHatchStyle
            ElseIf rdoWalls.Checked Then
                wallsHatchStyle = selectedHatchStyle
            End If
            If Not isRestoringState Then SaveStateForUndo()
            picGame.Invalidate()
        End If
    End Sub

    Private Sub BtnAll_Click(sender As Object, e As EventArgs) Handles BtnAll.Click
        If Not isRestoringState Then SaveStateForUndo()
        RandomizeWalls()
        RandomizeFloors()
        picGame.Invalidate()
    End Sub

    Private Sub BtnWalls_Click(sender As Object, e As EventArgs) Handles BtnWall.Click
        If Not isRestoringState Then SaveStateForUndo()
        RandomizeWalls()
        picGame.Invalidate()
    End Sub

    Private Sub BtnFloors_Click(sender As Object, e As EventArgs) Handles BtnFloor.Click
        If Not isRestoringState Then SaveStateForUndo()
        RandomizeFloors()
        picGame.Invalidate()
    End Sub

    Private Sub RandomizeWalls()
        wallsColor1 = Color.FromArgb(rand.Next(256), rand.Next(256), rand.Next(256))
        wallsColor2 = Color.FromArgb(rand.Next(256), rand.Next(256), rand.Next(256))
        Dim hatchStyles As Array = [Enum].GetValues(GetType(HatchStyle))
        wallsHatchStyle = CType(hatchStyles.GetValue(rand.Next(hatchStyles.Length)), HatchStyle)
        UpdateSelections()
    End Sub

    Private Sub RandomizeFloors()
        floorsColor1 = Color.FromArgb(rand.Next(256), rand.Next(256), rand.Next(256))
        floorsColor2 = Color.FromArgb(rand.Next(256), rand.Next(256), rand.Next(256))
        Dim hatchStyles As Array = [Enum].GetValues(GetType(HatchStyle))
        floorsHatchStyle = CType(hatchStyles.GetValue(rand.Next(hatchStyles.Length)), HatchStyle)
        UpdateSelections()
    End Sub

    Private Sub UpdateSelections()
        If rdoWalls.Checked Then
            lstHatchstyles.SelectedItem = wallsHatchStyle.ToString()
        ElseIf rdoFloors.Checked Then
            lstHatchstyles.SelectedItem = floorsHatchStyle.ToString()
        ElseIf rdoEdge.Checked Then
            lstHatchstyles.SelectedItem = wallsHatchStyle.ToString()
        End If

        cboStyleChoice.Enabled = rdoFloors.Checked
        If rdoFloors.Checked AndAlso useGradient Then
            lstHatchstyles.Enabled = False
        Else
            lstHatchstyles.Enabled = True
        End If

        If cboStyleChoice.Items.Count > 0 Then
            If useGradient Then
                cboStyleChoice.SelectedIndex = cboStyleChoice.Items.IndexOf("Gradient")
            Else
                cboStyleChoice.SelectedIndex = cboStyleChoice.Items.IndexOf("HatchStyle")
            End If
        End If

        ' Update the color pickers to reflect the current colors
        UpdateColorPickers()
    End Sub
    Private Sub RdoWalls_CheckedChanged(sender As Object, e As EventArgs) Handles rdoWalls.CheckedChanged
        If rdoWalls.Checked Then
            UpdateSelections()
        End If
    End Sub

    Private Sub RdoFloors_CheckedChanged(sender As Object, e As EventArgs) Handles rdoFloors.CheckedChanged
        If rdoFloors.Checked Then
            UpdateSelections()
        End If
    End Sub

    Private Sub RdoEdge_CheckedChanged(sender As Object, e As EventArgs) Handles rdoEdge.CheckedChanged
        If rdoEdge.Checked Then
            UpdateSelections()
        End If
    End Sub
    Private Sub CboStyleChoice_SelectedIndexChanged(sender As Object, e As EventArgs) Handles cboStyleChoice.SelectedIndexChanged
        useGradient = cboStyleChoice.SelectedItem.ToString() = "Gradient"
        lstHatchstyles.Enabled = Not useGradient
        picGame.Invalidate() ' Redraw the picGame control
    End Sub

    Private Sub CboX_SelectedIndexChanged(sender As Object, e As EventArgs) Handles cboX.SelectedIndexChanged, cboY.SelectedIndexChanged
        UpdateGridSize()
    End Sub

    Private Sub UpdateGridSize()
        Dim newSQCOUNTX As Integer
        Dim newSQCOUNTY As Integer
        If Integer.TryParse(cboX.SelectedItem?.ToString(), newSQCOUNTX) AndAlso Integer.TryParse(cboY.SelectedItem?.ToString(), newSQCOUNTY) Then
            If Not isRestoringState Then SaveStateForUndo()
            Dim oldSQCOUNTX As Integer = SQCOUNTX
            Dim oldSQCOUNTY As Integer = SQCOUNTY
            SQCOUNTX = newSQCOUNTX
            SQCOUNTY = newSQCOUNTY
            useGradient = (cboStyleChoice.SelectedItem?.ToString() = "Gradient")
            ResizeArrays(oldSQCOUNTX, oldSQCOUNTY, SQCOUNTX, SQCOUNTY)
            CalculateSquareSizes(picGame.ClientSize.Width, picGame.ClientSize.Height)
            picGame.Invalidate()
            highlightedX = -1
            highlightedY = -1
            isMouseInsideGrid = False
            selectionRectangle = Rectangle.Empty
        End If
    End Sub

    Friend Sub ResizeArrays(oldX As Integer, oldY As Integer, newX As Integer, newY As Integer)
        verticalWalls = ResizeJaggedArray(verticalWalls, oldX + 1, oldY - 1, newX + 1, newY - 1, True)
        verticalWallItems = ResizeJaggedArray(verticalWallItems, oldX + 1, oldY - 1, newX + 1, newY - 1, False)
        horizontalWalls = ResizeJaggedArray(horizontalWalls, oldX - 1, oldY + 1, newX - 1, newY + 1, True)
        horizontalWallItems = ResizeJaggedArray(horizontalWallItems, oldX - 1, oldY + 1, newX - 1, newY + 1, False)
        placedItems = ResizeJaggedArray(placedItems, oldX - 1, oldY - 1, newX - 1, newY - 1, False)
        floorsUseEdgeStyle = ResizeJaggedArray(floorsUseEdgeStyle, oldX - 1, oldY - 1, newX - 1, newY - 1, False)
        FillBorderWalls()
    End Sub

    Private Function ResizeJaggedArray(Of T)(sourceArray As T()(), oldSizeX As Integer, oldSizeY As Integer, newSizeX As Integer, newSizeY As Integer, initializeValue As Boolean) As T()()
        Dim newArray As T()() = New T(newSizeX)() {}
        For x As Integer = 0 To newSizeX
            newArray(x) = New T(newSizeY) {}
            For y As Integer = 0 To newSizeY
                If x < sourceArray.Length AndAlso y < sourceArray(x).Length Then
                    newArray(x)(y) = sourceArray(x)(y)
                Else
                    If GetType(T) Is GetType(Boolean) AndAlso initializeValue Then
                        newArray(x)(y) = CType(Convert.ChangeType(True, GetType(T)), T)
                    Else
                        newArray(x)(y) = Nothing
                    End If
                End If
            Next
        Next
        Return newArray
    End Function

#End Region

#Region " Mouse Controls "
    Public Sub PictureBox_MouseEnter(sender As Object, e As EventArgs)
        Dim pb As PictureBox = DirectCast(sender, PictureBox)
        pb.BackColor = Color.LightBlue
    End Sub

    Public Sub PictureBox_MouseLeave(sender As Object, e As EventArgs)
        Dim pb As PictureBox = DirectCast(sender, PictureBox)
        pb.BackColor = Color.Transparent
    End Sub

    Private Sub Form_MouseMove(sender As Object, e As MouseEventArgs) Handles Me.MouseMove
        Dim screenPos As Point = Me.PointToScreen(New Point(e.X, e.Y))
        Dim picGameClientPoint As Point = picGame.PointToClient(screenPos)

        isCursorOnPicGame = picGame.ClientRectangle.Contains(picGameClientPoint)

        If isDraggingItem Then
            mouseX = picGameClientPoint.X
            mouseY = picGameClientPoint.Y

            If isCursorOnPicGame Then
                UpdateHighlight(mouseX, mouseY)
                isMouseInsideGrid = True

                ' Snap the item to the nearest wall and center it
                If draggedItemIsWall Then
                    If draggedItemIsVerticalWall Then
                        mouseX = INDENT + highlightedX * (SQSizeX + WALL_THICKNESS) - WALL_THICKNESS \ 2 + 4
                        mouseY = INDENT + highlightedY * (SQSizeY + WALL_THICKNESS) + WALL_THICKNESS \ 2 + SQSizeY \ 2
                    Else
                        mouseX = INDENT + highlightedX * (SQSizeX + WALL_THICKNESS) + WALL_THICKNESS \ 2 + SQSizeX \ 2
                        mouseY = INDENT + highlightedY * (SQSizeY + WALL_THICKNESS) - WALL_THICKNESS \ 2 + 4
                    End If
                Else
                    mouseX = INDENT + highlightedX * (SQSizeX + WALL_THICKNESS) + WALL_THICKNESS \ 2 + SQSizeX \ 2
                    mouseY = INDENT + highlightedY * (SQSizeY + WALL_THICKNESS) + WALL_THICKNESS \ 2 + SQSizeY \ 2
                End If
            Else
                isMouseInsideGrid = False
            End If

            picGame.Invalidate() ' Invalidate only the picGame control
        End If

        UpdateStatusBar(e.X, e.Y)
    End Sub

    Private Sub Form_MouseUp(sender As Object, e As MouseEventArgs) Handles Me.MouseUp
        If isDraggingItem AndAlso e.Button = MouseButtons.Left Then
            ' Before modifying the data model, save the state
            If Not isRestoringState Then
                SaveStateForUndo()
            End If

            isDraggingItem = False
            Me.Capture = False
            Cursor.Current = Cursors.Default

            Dim screenPos As Point = Me.PointToScreen(New Point(e.X, e.Y))
            Dim picGameClientPoint As Point = picGame.PointToClient(screenPos)

            If picGame.ClientRectangle.Contains(picGameClientPoint) Then
                mouseX = picGameClientPoint.X
                mouseY = picGameClientPoint.Y
                UpdateHighlight(mouseX, mouseY)

                If isMouseInsideGrid Then
                    If draggedItemIsWall Then
                        If draggedItemIsVerticalWall Then
                            If highlightedX >= 0 AndAlso highlightedX < verticalWallItems.Length AndAlso
                           verticalWallItems(highlightedX) IsNot Nothing AndAlso
                           highlightedY >= 0 AndAlso highlightedY < verticalWallItems(0).Length Then

                                If Not IsVerticalWallConnectedToEdge(New Point(highlightedX, highlightedY)) OrElse IsFlipperItem(draggedItem.ImageKey) Then
                                    verticalWallItems(highlightedX)(highlightedY) = draggedItem
                                    verticalWalls(highlightedX)(highlightedY) = False
                                Else
                                    ReturnItemToOriginalLocation()
                                End If
                            End If
                        Else
                            If highlightedX >= 0 AndAlso highlightedX < horizontalWallItems.Length AndAlso
                           horizontalWallItems(highlightedX) IsNot Nothing AndAlso
                           highlightedY >= 0 AndAlso highlightedY < horizontalWallItems(0).Length Then

                                If Not IsHorizontalWallConnectedToEdge(New Point(highlightedX, highlightedY)) OrElse IsFlipperItem(draggedItem.ImageKey) Then
                                    horizontalWallItems(highlightedX)(highlightedY) = draggedItem
                                    horizontalWalls(highlightedX)(highlightedY) = False
                                Else
                                    ReturnItemToOriginalLocation()
                                End If
                            End If
                        End If
                    Else
                        ' Existing code for placing non-wall items
                        If highlightedX >= 0 AndAlso highlightedX < placedItems.Length AndAlso
                       highlightedY >= 0 AndAlso highlightedY < placedItems(0).Length Then

                            placedItems(highlightedX)(highlightedY) = draggedItem
                        End If
                    End If
                Else
                    ReturnItemToOriginalLocation()
                End If
            Else
                ReturnItemToOriginalLocation()
            End If

            draggedItem = Nothing

            If isActionInProgress Then
                isActionInProgress = False
                redoStack.Clear()
            End If

            picGame.Invalidate()
            redoStack.Clear()
        End If
    End Sub
    Private Sub PicBlock_MouseDown(sender As Object, e As MouseEventArgs) Handles picBlock1.MouseDown, picBaddy1.MouseDown, picBaddy2.MouseDown, picLazer1.MouseDown, picLazer2.MouseDown, picFlipper1.MouseDown, picFlipper2.MouseDown, picFlipper3.MouseDown, picFlipper4.MouseDown, picBaddy3.MouseDown, picBaddy4.MouseDown, picCoin.MouseDown, picGate.MouseDown, picKey.MouseDown, picStart.MouseDown, picFinish.MouseDown, picBlockStopper1.MouseDown, picBall.MouseDown, picBlockSwitch.MouseDown, picBomb.MouseDown, picWarp.MouseDown, picWarp2.MouseDown

        Dim pic As PictureBox = CType(sender, PictureBox)

        isDraggingItem = True

        ' Create a new PlacedItem with the ImageKey
        draggedItem = New PlacedItem() With {.ImageKey = pic.Name}

        ' Determine if it's a wall item
        draggedItemIsWall = IsVerticalItem(pic.Name) OrElse IsHorizontalItem(pic.Name)
        draggedItemIsVerticalWall = IsVerticalItem(pic.Name)

        ' Since it's being dragged from the toolbox, there is no original position
        draggedItemOriginalX = -1
        draggedItemOriginalY = -1

        ' Capture the mouse events at the form level
        Me.Capture = True

        Cursor.Current = Cursors.Hand

        ' Initialize the mouse position to the current cursor position
        Dim mousePos As Point = picGame.PointToClient(Cursor.Position)
        mouseX = mousePos.X
        mouseY = mousePos.Y
        picGame.Invalidate()
    End Sub

    Private Sub PicGame_MouseDown(sender As Object, e As MouseEventArgs) Handles picGame.MouseDown
        If SelectionMode Then
            ' Handle selecting a square in selection mode
            Dim clickedX As Integer = (e.X - INDENT) \ (SQSizeX + WALL_THICKNESS)
            Dim clickedY As Integer = (e.Y - INDENT) \ (SQSizeY + WALL_THICKNESS)

            Dim selected As New SelectedObject With {
            .Type = "Square",
            .Coordinates = New Point(clickedX, clickedY)
        }

            RaiseEvent ObjectSelected(selected)

            SelectionMode = False
            SelectionRequestedByForm = Nothing
            SelectionRequestedFor = Nothing

            Return
        End If

        If isSelectionReadyToDrag Then
            If selectionRectangle.Contains(e.Location) Then
                If e.Button = MouseButtons.Left Then
                    SaveStateForUndo()
                    isDraggingSelection = True
                    selectionOffset = New Point(e.X - selectionRectangle.X, e.Y - selectionRectangle.Y)
                    selectionStartCell = New Point(
                        (selectionRectangle.X - INDENT) \ (SQSizeX + WALL_THICKNESS),
                        (selectionRectangle.Y - INDENT) \ (SQSizeY + WALL_THICKNESS))
                    picGame.Capture = True
                    Cursor = Cursors.SizeAll
                ElseIf e.Button = MouseButtons.Right Then
                    ' Show context menu
                    Dim menuPosition As Point = e.Location
                    ctmMenu.Show(picGame, menuPosition)
                End If
            Else
                ' Do not clear the selection when clicking outside
                ' Optional: You can set up behavior to start a new selection if desired
                ' For now, we'll keep the selection as is
            End If
        ElseIf isInSelectionMode Then
            ' Start selecting a new area
            If e.Button = MouseButtons.Left Then
                isSelecting = True
                selectionStartPoint = e.Location
                selectionEndPoint = e.Location
                selectionRectangle = GetRectangle(selectionStartPoint, selectionEndPoint)

                ' Reset selection data
                selectionData = Nothing
                selectionStartCell = New Point(-1, -1)
                copiedSelectionData = Nothing
                copiedSelectionType = ""

                picGame.Invalidate()
            ElseIf e.Button = MouseButtons.Right Then
                If selectionRectangle.Contains(e.Location) Then
                    Dim menuPosition As Point = e.Location
                    ctmMenu.Show(picGame, menuPosition)
                End If
            End If
        Else
            ' Normal mouse down processing
            If e.Button = MouseButtons.Right Then
                isRightMouseDown = True
                rightMouseDownPosition = e.Location
                rightMouseDownTime = DateTime.Now
                If Not isActionInProgress Then
                    isActionInProgress = True
                    SaveStateForUndo()
                End If
            ElseIf e.Button = MouseButtons.Left Then
                isLeftMouseDown = True
                UpdateHighlight(e.X, e.Y)
                Dim itemPickedUp As Boolean = False
                If isMouseInsideGrid Then
                    If Not isActionInProgress Then
                        isActionInProgress = True
                        SaveStateForUndo()
                    End If

                    If highlightedWallX Then
                        If highlightedX >= 0 AndAlso highlightedX < verticalWallItems.Length AndAlso
                       verticalWallItems(highlightedX) IsNot Nothing AndAlso
                       highlightedY >= 0 AndAlso highlightedY < verticalWallItems(0).Length Then

                            If verticalWallItems(highlightedX)(highlightedY) IsNot Nothing Then
                                isDraggingItem = True
                                draggedItem = verticalWallItems(highlightedX)(highlightedY)
                                draggedItemIsWall = True
                                draggedItemIsVerticalWall = True
                                draggedItemOriginalX = highlightedX
                                draggedItemOriginalY = highlightedY
                                verticalWallItems(highlightedX)(highlightedY) = Nothing
                                verticalWalls(highlightedX)(highlightedY) = True
                                picGame.Capture = True
                                itemPickedUp = True
                            End If
                        End If
                    ElseIf highlightedWallY Then
                        If highlightedX >= 0 AndAlso highlightedX < horizontalWallItems.Length AndAlso
                       horizontalWallItems(highlightedX) IsNot Nothing AndAlso
                       highlightedY >= 0 AndAlso highlightedY < horizontalWallItems(0).Length Then

                            If horizontalWallItems(highlightedX)(highlightedY) IsNot Nothing Then
                                isDraggingItem = True
                                draggedItem = horizontalWallItems(highlightedX)(highlightedY)
                                draggedItemIsWall = True
                                draggedItemIsVerticalWall = False
                                draggedItemOriginalX = highlightedX
                                draggedItemOriginalY = highlightedY
                                horizontalWallItems(highlightedX)(highlightedY) = Nothing
                                horizontalWalls(highlightedX)(highlightedY) = True
                                picGame.Capture = True
                                itemPickedUp = True
                            End If
                        End If
                    Else
                        If highlightedX >= 0 AndAlso highlightedX < placedItems.Length AndAlso
                       placedItems(highlightedX) IsNot Nothing AndAlso
                       highlightedY >= 0 AndAlso highlightedY < placedItems(0).Length Then

                            If placedItems(highlightedX)(highlightedY) IsNot Nothing Then
                                isDraggingItem = True
                                draggedItem = placedItems(highlightedX)(highlightedY)
                                draggedItemIsWall = False
                                draggedItemIsVerticalWall = False
                                draggedItemOriginalX = highlightedX
                                draggedItemOriginalY = highlightedY
                                placedItems(highlightedX)(highlightedY) = Nothing
                                picGame.Capture = True
                                itemPickedUp = True
                            End If
                        End If
                    End If

                    If itemPickedUp Then
                        redoStack.Clear()
                        picGame.Invalidate()
                    Else
                        If rdoEdge.Checked Then
                            isLeftMouseDown = True
                            SetEdgeStyleAtMousePosition(e.X, e.Y)
                        Else
                            isLeftMouseDown = True
                            AddWallAtMousePosition(e.X, e.Y)
                        End If
                    End If
                End If
            End If
        End If
    End Sub
    Private Sub PicGame_MouseMove(sender As Object, e As MouseEventArgs) Handles picGame.MouseMove
        isCursorOnPicGame = True

        If isDraggingSelection Then
            ' Existing code for dragging selection
            If isCopying Then
                If copiedSelectionData Is Nothing Then
                    Return
                End If
            Else
                If selectionData Is Nothing Then
                    CaptureSelectionData()
                End If
            End If

            ' Calculate new cell positions
            Dim newX As Integer = e.X - selectionOffset.X
            Dim newY As Integer = e.Y - selectionOffset.Y

            Dim cellX As Integer = (newX - INDENT) \ (SQSizeX + WALL_THICKNESS)
            Dim cellY As Integer = (newY - INDENT) \ (SQSizeY + WALL_THICKNESS)

            ' Ensure cellX and cellY are within bounds
            If isCopying Then
                cellX = Math.Max(0, Math.Min(SQCOUNTX - copiedSelectionData.selectionWidth, cellX))
                cellY = Math.Max(0, Math.Min(SQCOUNTY - copiedSelectionData.selectionHeight, cellY))
                selectionRectangle.Width = copiedSelectionData.selectionWidth * (SQSizeX + WALL_THICKNESS) - WALL_THICKNESS
                selectionRectangle.Height = copiedSelectionData.selectionHeight * (SQSizeY + WALL_THICKNESS) - WALL_THICKNESS
            Else
                cellX = Math.Max(0, Math.Min(SQCOUNTX - selectionData.selectionWidth, cellX))
                cellY = Math.Max(0, Math.Min(SQCOUNTY - selectionData.selectionHeight, cellY))
                selectionRectangle.Width = selectionData.selectionWidth * (SQSizeX + WALL_THICKNESS) - WALL_THICKNESS
                selectionRectangle.Height = selectionData.selectionHeight * (SQSizeY + WALL_THICKNESS) - WALL_THICKNESS
            End If

            ' Update selection rectangle position
            selectionRectangle.X = INDENT + cellX * (SQSizeX + WALL_THICKNESS)
            selectionRectangle.Y = INDENT + cellY * (SQSizeY + WALL_THICKNESS)

            ' Store cell positions for use in MouseUp
            draggedSelectionCellX = cellX
            draggedSelectionCellY = cellY

            picGame.Invalidate()
        ElseIf isDraggingItem Then
            ' Update the mouse position to the current cursor position
            mouseX = e.X
            mouseY = e.Y

            ' Snap the item to the nearest wall and center it
            UpdateHighlight(e.X, e.Y)
            If draggedItemIsWall Then
                If draggedItemIsVerticalWall Then
                    mouseX = INDENT + highlightedX * (SQSizeX + WALL_THICKNESS) - WALL_THICKNESS \ 2 + 3
                    mouseY = INDENT + highlightedY * (SQSizeY + WALL_THICKNESS) + WALL_THICKNESS \ 2 + SQSizeY \ 2
                Else
                    mouseX = INDENT + highlightedX * (SQSizeX + WALL_THICKNESS) + WALL_THICKNESS \ 2 + SQSizeX \ 2
                    mouseY = INDENT + highlightedY * (SQSizeY + WALL_THICKNESS) - WALL_THICKNESS \ 2 + 3
                End If
            Else
                mouseX = INDENT + highlightedX * (SQSizeX + WALL_THICKNESS) + WALL_THICKNESS \ 2 + SQSizeX \ 2
                mouseY = INDENT + highlightedY * (SQSizeY + WALL_THICKNESS) + WALL_THICKNESS \ 2 + SQSizeY \ 2
            End If

            picGame.Invalidate()
        ElseIf isInSelectionMode Then
            If isSelecting Then
                selectionEndPoint = e.Location
                selectionRectangle = GetRectangle(selectionStartPoint, selectionEndPoint)
                picGame.Invalidate()
            End If
        Else
            UpdateHighlight(e.X, e.Y)
            picGame.Invalidate()
            If isRightMouseDown Then
                If rdoEdge.Checked Then
                    If isMouseInsideGrid Then
                        RemoveEdgeStyleAtMousePosition(e.X, e.Y)
                    End If
                Else
                    Dim deltaX As Integer = e.X - rightMouseDownPosition.X
                    Dim deltaY As Integer = e.Y - rightMouseDownPosition.Y
                    Dim distanceSquared As Integer = deltaX * deltaX + deltaY * deltaY
                    If distanceSquared > CLICK_DRAG_THRESHOLD_SQUARED Then
                        RemoveObjectAtMousePosition(e.X, e.Y, removeWalls:=True, removeItems:=False)
                    End If
                End If
            End If
            If isLeftMouseDown Then
                If rdoEdge.Checked Then
                    If isMouseInsideGrid Then
                        SetEdgeStyleAtMousePosition(e.X, e.Y)
                    End If
                Else
                    AddWallAtMousePosition(e.X, e.Y)
                End If
            End If
        End If

        UpdateStatusBar(e.X, e.Y)
    End Sub
    Private Sub UpdateStatusBar(pixelX As Integer, pixelY As Integer)
        ' Calculate the square coordinates based on the mouse position
        Dim squareX As Integer = (pixelX - INDENT + (SQSizeX + WALL_THICKNESS) \ 2) \ (SQSizeX + WALL_THICKNESS)
        Dim squareY As Integer = (pixelY - INDENT + (SQSizeY + WALL_THICKNESS) \ 2) \ (SQSizeY + WALL_THICKNESS)

        ' Ensure the coordinates are within the grid bounds
        squareX = Math.Max(0, Math.Min(SQCOUNTX - 1, squareX))
        squareY = Math.Max(0, Math.Min(SQCOUNTY - 1, squareY))

        ' Determine if the mouse is over a wall
        Dim isOverWall As Boolean = highlightedWallX OrElse highlightedWallY

        ' Determine the content of the square or wall
        Dim content As String = "Empty"
        If isOverWall Then
            If highlightedWallX Then
                If highlightedX >= 0 AndAlso highlightedX < verticalWallItems.Length AndAlso
           highlightedY >= 0 AndAlso highlightedY < verticalWallItems(0).Length Then
                    If verticalWallItems(highlightedX)(highlightedY) IsNot Nothing Then
                        content = GetItemName(verticalWallItems(highlightedX)(highlightedY).ImageKey)
                    ElseIf verticalWalls(highlightedX)(highlightedY) Then
                        content = "Wall"
                    End If
                End If
            ElseIf highlightedWallY Then
                If highlightedX >= 0 AndAlso highlightedX < horizontalWallItems.Length AndAlso
           highlightedY >= 0 AndAlso highlightedY < horizontalWallItems(0).Length Then
                    If horizontalWallItems(highlightedX)(highlightedY) IsNot Nothing Then
                        content = GetItemName(horizontalWallItems(highlightedX)(highlightedY).ImageKey)
                    ElseIf horizontalWalls(highlightedX)(highlightedY) Then
                        content = "Wall"
                    End If
                End If
            End If
        Else
            If highlightedX >= 0 AndAlso highlightedX < placedItems.Length AndAlso
       highlightedY >= 0 AndAlso highlightedY < placedItems(0).Length Then
                If placedItems(highlightedX)(highlightedY) IsNot Nothing Then
                    content = GetItemName(placedItems(highlightedX)(highlightedY).ImageKey)
                ElseIf floorsUseEdgeStyle(highlightedX)(highlightedY) Then
                    content = "Edge"
                End If
            End If
        End If

        ' Update the status bar text
        If isOverWall Then
            stb.Text = "Location: " & pixelX & ", " & pixelY & " | Wall: " & squareX & ", " & squareY & " | " & content
        Else
            stb.Text = "Location: " & pixelX & ", " & pixelY & " | Square: " & squareX & ", " & squareY & " | " & content
        End If
    End Sub

    Private Sub PicGame_MouseUp(sender As Object, e As MouseEventArgs) Handles picGame.MouseUp
        If isDraggingSelection Then
            ' Completing selection dragging
            If e.Button = MouseButtons.Left Then
                ' Save the state before modifying the data model
                If Not isRestoringState Then
                    SaveStateForUndo()
                End If

                isDraggingSelection = False
                picGame.Capture = False
                Cursor = Cursors.Default

                If selectionRectangle.IsEmpty Then
                    Return
                End If

                ' Use stored cell positions from MouseMove
                Dim newCellX As Integer = draggedSelectionCellX
                Dim newCellY As Integer = draggedSelectionCellY

                If isCopying Then
                    ' Ensure the new position is within bounds
                    newCellX = Math.Max(0, Math.Min(SQCOUNTX - copiedSelectionData.selectionWidth, newCellX))
                    newCellY = Math.Max(0, Math.Min(SQCOUNTY - copiedSelectionData.selectionHeight, newCellY))
                    PasteSelectionDataTo(newCellX, newCellY)
                Else
                    ' Ensure the new position is within bounds
                    newCellX = Math.Max(0, Math.Min(SQCOUNTX - selectionData.selectionWidth, newCellX))
                    newCellY = Math.Max(0, Math.Min(SQCOUNTY - selectionData.selectionHeight, newCellY))
                    MoveSelectionDataTo(newCellX, newCellY)
                End If

                isCopying = False
                isSelectionReadyToDrag = False

                ' Reset selection-related variables to prevent issues with future operations
                selectionData = Nothing
                selectionStartCell = New Point(-1, -1)
                copiedSelectionData = Nothing
                copiedSelectionType = ""
                isCopying = False
                isSelectionReadyToDrag = False
                isDraggingSelection = False

                picGame.Invalidate()

                ' Clear the redo stack since we've made a new change
                redoStack.Clear()
            End If
        ElseIf isInSelectionMode AndAlso isSelecting Then
            If e.Button = MouseButtons.Left Then
                ' Finalizing the selection rectangle
                isSelecting = False
                selectionEndPoint = e.Location
                selectionRectangle = GetRectangle(selectionStartPoint, selectionEndPoint)

                ' Snap the selection rectangle to grid cells
                Dim adjustedSelectionRectangle As Rectangle = AdjustSelectionRectangleToGrid(selectionRectangle)

                ' Update selectionRectangle with adjusted values
                selectionRectangle = adjustedSelectionRectangle

                ' Reset selection-related variables
                selectionData = Nothing
                selectionStartCell = New Point(-1, -1)
                copiedSelectionData = Nothing
                copiedSelectionType = ""
                isCopying = False
                isSelectionReadyToDrag = False
                isDraggingSelection = False

                picGame.Invalidate()

                If selectionRectangle.IsEmpty Then
                    isInSelectionMode = False
                    Cursor = Cursors.Default
                    selectionRectangle = Rectangle.Empty
                End If
            End If
        Else
            ' Normal mouse up processing
            If e.Button = MouseButtons.Left Then
                If isDraggingItem Then
                    ' Save the state before modifying the data model
                    If Not isRestoringState Then
                        SaveStateForUndo()
                    End If

                    isDraggingItem = False
                    picGame.Capture = False
                    Cursor.Current = Cursors.Default

                    ' Snap the item to the grid position
                    UpdateHighlight(e.X, e.Y)
                    If isMouseInsideGrid Then
                        If draggedItemIsWall Then
                            If draggedItemIsVerticalWall Then
                                If highlightedX >= 0 AndAlso highlightedX < verticalWallItems.Length AndAlso
                               highlightedY >= 0 AndAlso highlightedY < verticalWallItems(0).Length Then

                                    If Not IsVerticalWallConnectedToEdge(New Point(highlightedX, highlightedY)) Then
                                        verticalWallItems(highlightedX)(highlightedY) = draggedItem
                                        verticalWalls(highlightedX)(highlightedY) = False
                                    Else
                                        ReturnItemToOriginalLocation()
                                    End If
                                End If
                            Else
                                If highlightedX >= 0 AndAlso highlightedX < horizontalWallItems.Length AndAlso
                               highlightedY >= 0 AndAlso highlightedY < horizontalWallItems(0).Length Then

                                    If Not IsHorizontalWallConnectedToEdge(New Point(highlightedX, highlightedY)) Then
                                        horizontalWallItems(highlightedX)(highlightedY) = draggedItem
                                        horizontalWalls(highlightedX)(highlightedY) = False
                                    Else
                                        ReturnItemToOriginalLocation()
                                    End If
                                End If
                            End If
                        Else
                            If highlightedX >= 0 AndAlso highlightedX < placedItems.Length AndAlso
                           highlightedY >= 0 AndAlso highlightedY < placedItems(0).Length Then

                                placedItems(highlightedX)(highlightedY) = draggedItem
                            End If
                        End If
                    Else
                        ReturnItemToOriginalLocation()
                    End If

                    ' Clear redo stack since we've made a new change
                    redoStack.Clear()

                    ' Invalidate the picGame control to refresh the display
                    picGame.Invalidate()
                End If

                isLeftMouseDown = False
                isActionInProgress = False

            ElseIf e.Button = MouseButtons.Right Then
                If isRightMouseDown Then
                    isRightMouseDown = False

                    If rdoEdge.Checked Then
                        UpdateHighlight(e.X, e.Y)
                        If isMouseInsideGrid Then
                            If Not highlightedWallX AndAlso Not highlightedWallY Then
                                If highlightedX >= 0 AndAlso highlightedX < SQCOUNTX AndAlso highlightedY >= 0 AndAlso highlightedY < SQCOUNTY Then
                                    floorsUseEdgeStyle(highlightedX)(highlightedY) = False
                                    picGame.Invalidate()
                                End If
                            End If
                        End If
                    Else
                        Dim deltaX As Integer = e.X - rightMouseDownPosition.X
                        Dim deltaY As Integer = e.Y - rightMouseDownPosition.Y
                        Dim distanceSquared As Integer = deltaX * deltaX + deltaY * deltaY
                        If distanceSquared < CLICK_DRAG_THRESHOLD_SQUARED Then
                            RemoveObjectAtMousePosition(e.X, e.Y, removeWalls:=False, removeItems:=True)
                        End If
                    End If

                    isActionInProgress = False
                End If
            End If
        End If
    End Sub
    Private Sub AddWallAtMousePosition(mouseX As Integer, mouseY As Integer)
        UpdateHighlight(mouseX, mouseY)

        If highlightedWallX Then
            If highlightedX >= 0 AndAlso highlightedX < verticalWalls.Length AndAlso
   highlightedY >= 0 AndAlso highlightedY < verticalWalls(0).Length Then
                verticalWalls(highlightedX)(highlightedY) = True
                picGame.Invalidate()
            End If
        ElseIf highlightedWallY Then
            If highlightedX >= 0 AndAlso highlightedX < horizontalWalls.Length AndAlso
   highlightedY >= 0 AndAlso highlightedY < horizontalWalls(0).Length Then
                horizontalWalls(highlightedX)(highlightedY) = True
                picGame.Invalidate()
            End If
        End If
    End Sub

    Private Sub RemoveObjectAtMousePosition(mouseX As Integer, mouseY As Integer, removeWalls As Boolean, removeItems As Boolean)
        UpdateHighlight(mouseX, mouseY)

        If Not isMouseInsideGrid Then
            Return
        End If

        If highlightedWallX Then
            If highlightedX >= 0 AndAlso highlightedX < verticalWallItems.Length AndAlso
   verticalWallItems(highlightedX) IsNot Nothing AndAlso
   highlightedY >= 0 AndAlso highlightedY < verticalWallItems(0).Length Then

                If removeItems AndAlso verticalWallItems(highlightedX)(highlightedY) IsNot Nothing Then
                    verticalWallItems(highlightedX)(highlightedY) = Nothing
                    verticalWalls(highlightedX)(highlightedY) = True
                    picGame.Invalidate()

                    If IsVerticalWallConnectedToEdge(New Point(highlightedX, highlightedY)) Then
                        verticalWalls(highlightedX)(highlightedY) = True
                    End If
                ElseIf removeWalls AndAlso verticalWalls(highlightedX)(highlightedY) Then
                    If Not IsVerticalWallOuterBorder(highlightedX) AndAlso Not IsVerticalWallConnectedToEdge(New Point(highlightedX, highlightedY)) Then
                        verticalWalls(highlightedX)(highlightedY) = False
                        picGame.Invalidate()
                    End If
                End If
            End If
        ElseIf highlightedWallY Then
            If highlightedX >= 0 AndAlso highlightedX < horizontalWallItems.Length AndAlso
   horizontalWallItems(highlightedX) IsNot Nothing AndAlso
   highlightedY >= 0 AndAlso highlightedY < horizontalWallItems(0).Length Then

                If removeItems AndAlso horizontalWallItems(highlightedX)(highlightedY) IsNot Nothing Then
                    horizontalWallItems(highlightedX)(highlightedY) = Nothing
                    horizontalWalls(highlightedX)(highlightedY) = True
                    picGame.Invalidate()

                    If IsHorizontalWallConnectedToEdge(New Point(highlightedX, highlightedY)) Then
                        horizontalWalls(highlightedX)(highlightedY) = True
                    End If
                ElseIf removeWalls AndAlso horizontalWalls(highlightedX)(highlightedY) Then
                    If Not IsHorizontalWallOuterBorder(highlightedY) AndAlso Not IsHorizontalWallConnectedToEdge(New Point(highlightedX, highlightedY)) Then
                        horizontalWalls(highlightedX)(highlightedY) = False
                        picGame.Invalidate()
                    End If
                End If
            End If
        Else
            If highlightedX >= 0 AndAlso highlightedX < placedItems.Length AndAlso
   placedItems(highlightedX) IsNot Nothing AndAlso
   highlightedY >= 0 AndAlso highlightedY < placedItems(0).Length Then

                If removeItems AndAlso placedItems(highlightedX)(highlightedY) IsNot Nothing Then
                    placedItems(highlightedX)(highlightedY) = Nothing
                    picGame.Invalidate()
                End If
            End If
        End If
    End Sub

    Private Sub SetEdgeStyleAtMousePosition(mouseX As Integer, mouseY As Integer)
        UpdateHighlight(mouseX, mouseY)
        If Not highlightedWallX AndAlso Not highlightedWallY Then
            If highlightedX >= 0 AndAlso highlightedX < SQCOUNTX AndAlso highlightedY >= 0 AndAlso highlightedY < SQCOUNTY Then
                floorsUseEdgeStyle(highlightedX)(highlightedY) = True

                If highlightedX >= 0 AndAlso highlightedX < verticalWalls.Length AndAlso
           verticalWalls(highlightedX) IsNot Nothing AndAlso
           highlightedY >= 0 AndAlso highlightedY < verticalWalls(0).Length Then
                    verticalWallItems(highlightedX)(highlightedY) = Nothing
                    verticalWalls(highlightedX)(highlightedY) = True
                End If

                If highlightedX + 1 >= 0 AndAlso highlightedX + 1 < verticalWalls.Length AndAlso
           verticalWalls(highlightedX + 1) IsNot Nothing AndAlso
           highlightedY >= 0 AndAlso highlightedY < verticalWalls(0).Length Then
                    verticalWallItems(highlightedX + 1)(highlightedY) = Nothing
                    verticalWalls(highlightedX + 1)(highlightedY) = True
                End If

                If highlightedX >= 0 AndAlso highlightedX < horizontalWalls.Length AndAlso
           horizontalWalls(highlightedX) IsNot Nothing AndAlso
           highlightedY >= 0 AndAlso highlightedY < horizontalWalls(0).Length Then
                    horizontalWallItems(highlightedX)(highlightedY) = Nothing
                    horizontalWalls(highlightedX)(highlightedY) = True
                End If

                If highlightedX >= 0 AndAlso highlightedX < horizontalWalls.Length AndAlso
           horizontalWalls(highlightedX) IsNot Nothing AndAlso
           highlightedY + 1 >= 0 AndAlso highlightedY + 1 < horizontalWalls(0).Length Then
                    horizontalWallItems(highlightedX)(highlightedY + 1) = Nothing
                    horizontalWalls(highlightedX)(highlightedY + 1) = True
                End If

                picGame.Invalidate()
            End If
        End If
    End Sub

#End Region

#Region " Draw "
    Private Sub picGame_Paint(sender As Object, e As PaintEventArgs) Handles picGame.Paint
        ' Calculate the sizes of the squares based on the client size of picGame
        CalculateSquareSizes(picGame.ClientSize.Width, picGame.ClientSize.Height)

        ' Set the smoothing mode to None for pixel-perfect drawing
        e.Graphics.SmoothingMode = SmoothingMode.None

        ' Draw the gradient background if useGradient is true
        If useGradient Then
            DrawGradientBackground(e.Graphics)
        End If

        ' Draw the grid
        DrawGrid(e.Graphics)

        ' Draw any dragged item
        If isDraggingItem AndAlso draggedItem IsNot Nothing Then
            Dim img As Image = GetImageByKey(draggedItem.ImageKey)
            If img IsNot Nothing Then
                ImageAnimator.UpdateFrames(img)
                Dim drawRect As Rectangle

                If draggedItemIsWall Then
                    If draggedItemIsVerticalWall Then
                        Dim wallWidth As Integer = WALL_THICKNESS
                        Dim wallHeight As Integer = SQSizeY
                        Dim xPos As Integer = mouseX - WALL_THICKNESS \ 2
                        Dim yPos As Integer = mouseY - SQSizeY \ 2
                        Dim newWidth As Integer = img.Width
                        Dim newHeight As Integer = wallHeight
                        Dim centeredX As Integer = xPos + (wallWidth - newWidth) \ 2
                        drawRect = New Rectangle(centeredX, yPos, newWidth, newHeight)
                    Else
                        Dim wallWidth As Integer = SQSizeX
                        Dim wallHeight As Integer = WALL_THICKNESS
                        Dim xPos As Integer = mouseX - SQSizeX \ 2
                        Dim yPos As Integer = mouseY - WALL_THICKNESS \ 2
                        Dim newWidth As Integer = wallWidth
                        Dim newHeight As Integer = img.Height
                        Dim centeredY As Integer = yPos + (wallHeight - newHeight) \ 2
                        drawRect = New Rectangle(xPos, centeredY, newWidth, newHeight)
                    End If
                Else
                    Dim xPos As Integer = mouseX - SQSizeX \ 2
                    Dim yPos As Integer = mouseY - SQSizeY \ 2
                    drawRect = New Rectangle(xPos, yPos, SQSizeX, SQSizeY)
                End If
                e.Graphics.DrawImage(img, drawRect)
            End If
        End If

        ' Draw selection rectangle
        If (isInSelectionMode OrElse isSelectionReadyToDrag OrElse isDraggingSelection) AndAlso Not selectionRectangle.IsEmpty Then
            Using selectionBrush As New SolidBrush(Color.FromArgb(64, Color.Blue))
                e.Graphics.FillRectangle(selectionBrush, selectionRectangle)
            End Using
            Using selectionPen As New Pen(Color.Blue, 2) With {.DashStyle = DashStyle.Dash}
                e.Graphics.DrawRectangle(selectionPen, selectionRectangle)
            End Using
        End If

        ' Draw selection data during drag
        If isDraggingSelection Then
            Dim baseCellX As Integer = (selectionRectangle.X - INDENT) \ (SQSizeX + WALL_THICKNESS)
            Dim baseCellY As Integer = (selectionRectangle.Y - INDENT) \ (SQSizeY + WALL_THICKNESS)
            If isCopying Then
                DrawSelectionData(e.Graphics, baseCellX, baseCellY, copiedSelectionData)
            Else
                DrawSelectionData(e.Graphics, baseCellX, baseCellY, selectionData)
            End If
        End If

        ' Ensure DrawHighlight is called
        DrawHighlight(e.Graphics)
    End Sub
    Private Sub DrawGradientBackground(g As Graphics)
        Dim xOrigin As Integer = INDENT
        Dim yOrigin As Integer = INDENT
        Dim gridWidth As Integer = SQCOUNTX * (SQSizeX + WALL_THICKNESS)
        Dim gridHeight As Integer = SQCOUNTY * (SQSizeY + WALL_THICKNESS)

        Dim gradientRect As New Rectangle(xOrigin, yOrigin, gridWidth, gridHeight)

        Using brush As New LinearGradientBrush(gradientRect, floorsColor1, floorsColor2, LinearGradientMode.Vertical)
            g.FillRectangle(brush, gradientRect)
        End Using
    End Sub
    Private Sub DrawGrid(g As Graphics)
        Dim xOrigin As Integer = INDENT
        Dim yOrigin As Integer = INDENT

        DrawGradientBackground(g)

        For x As Integer = 0 To SQCOUNTX - 1
            For y As Integer = 0 To SQCOUNTY - 1
                Dim floorRect As New Rectangle(
        xOrigin + x * (SQSizeX + WALL_THICKNESS) + WALL_THICKNESS \ 2,
        yOrigin + y * (SQSizeY + WALL_THICKNESS) + WALL_THICKNESS \ 2,
        SQSizeX,
        SQSizeY
    )

                If floorsUseEdgeStyle(x)(y) Then
                    Using floorBrush As New HatchBrush(wallsHatchStyle, wallsColor1, wallsColor2)
                        g.FillRectangle(floorBrush, floorRect)
                    End Using
                ElseIf useGradient Then
                    Using hatchBrush As New HatchBrush(floorsHatchStyle, Color.Transparent, Color.Transparent)
                        g.FillRectangle(hatchBrush, floorRect)
                    End Using
                Else
                    Using floorBrush As New HatchBrush(floorsHatchStyle, floorsColor1, floorsColor2)
                        g.FillRectangle(floorBrush, floorRect)
                    End Using
                End If
            Next
        Next

        For x As Integer = 0 To SQCOUNTX
            For y As Integer = 0 To SQCOUNTY
                Dim intersectionRect As New Rectangle(
        xOrigin + x * (SQSizeX + WALL_THICKNESS) - WALL_THICKNESS \ 2,
        yOrigin + y * (SQSizeY + WALL_THICKNESS) - WALL_THICKNESS \ 2,
        WALL_THICKNESS,
        WALL_THICKNESS
    )

                Using wallBrush As New HatchBrush(wallsHatchStyle, wallsColor1, wallsColor2)
                    g.FillRectangle(wallBrush, intersectionRect)
                End Using
            Next
        Next

        For x As Integer = 0 To SQCOUNTX
            For y As Integer = 0 To SQCOUNTY - 1
                Dim wallRect As New Rectangle(
        xOrigin + x * (SQSizeX + WALL_THICKNESS) - WALL_THICKNESS \ 2,
        yOrigin + y * (SQSizeY + WALL_THICKNESS) + WALL_THICKNESS \ 2,
        WALL_THICKNESS, SQSizeY
    )

                If x >= 0 AndAlso x < verticalWalls.Length AndAlso
       verticalWalls(x) IsNot Nothing AndAlso
       y >= 0 AndAlso y < verticalWalls(0).Length Then

                    If verticalWalls(x)(y) Then
                        Using wallBrush As New HatchBrush(wallsHatchStyle, wallsColor1, wallsColor2)
                            g.FillRectangle(wallBrush, wallRect)
                        End Using
                    ElseIf useGradient Then
                        Using hatchBrush As New HatchBrush(floorsHatchStyle, Color.Transparent, Color.Transparent)
                            g.FillRectangle(hatchBrush, wallRect)
                        End Using
                    Else
                        Using floorBrush As New HatchBrush(floorsHatchStyle, floorsColor1, floorsColor2)
                            g.FillRectangle(floorBrush, wallRect)
                        End Using
                    End If
                End If
            Next
        Next

        For x As Integer = 0 To SQCOUNTX - 1
            For y As Integer = 0 To SQCOUNTY
                Dim wallRect As New Rectangle(
        xOrigin + x * (SQSizeX + WALL_THICKNESS) + WALL_THICKNESS \ 2,
        yOrigin + y * (SQSizeY + WALL_THICKNESS) - WALL_THICKNESS \ 2,
        SQSizeX, WALL_THICKNESS
    )

                If x >= 0 AndAlso x < horizontalWalls.Length AndAlso
       horizontalWalls(x) IsNot Nothing AndAlso
       y >= 0 AndAlso y < horizontalWalls(0).Length Then

                    If horizontalWalls(x)(y) Then
                        Using wallBrush As New HatchBrush(wallsHatchStyle, wallsColor1, wallsColor2)
                            g.FillRectangle(wallBrush, wallRect)
                        End Using
                    ElseIf useGradient Then
                        Using hatchBrush As New HatchBrush(floorsHatchStyle, Color.Transparent, Color.Transparent)
                            g.FillRectangle(hatchBrush, wallRect)
                        End Using
                    Else
                        Using floorBrush As New HatchBrush(floorsHatchStyle, floorsColor1, floorsColor2)
                            g.FillRectangle(floorBrush, wallRect)
                        End Using
                    End If
                End If
            Next
        Next

        DrawItems(g)
        DrawWallItems(g)

        DrawGridNumbers(g)
    End Sub
    Private Sub DrawGridNumbers(g As Graphics)
        Dim xOrigin As Integer = INDENT
        Dim yOrigin As Integer = INDENT
        Dim font As New Font("Arial", 10, FontStyle.Regular)
        Dim brush As New SolidBrush(Color.Black)

        Dim columnNumberOffsetY As Single = -20.0F
        Dim rowNumberOffsetX As Single = -5.0F

        For x As Integer = 0 To SQCOUNTX - 1
            Dim xPos As Single = xOrigin + x * (SQSizeX + WALL_THICKNESS) + WALL_THICKNESS \ 2 + CSng(SQSizeX) / 2
            Dim yPos As Single = yOrigin + columnNumberOffsetY

            Dim label As String = x.ToString()
            Dim xLabelSize As SizeF = g.MeasureString(label, font)
            g.DrawString(label, font, brush, xPos - xLabelSize.Width / 2.0F, yPos)
        Next

        For y As Integer = 0 To SQCOUNTY - 1
            Dim xPos As Single = xOrigin + rowNumberOffsetX
            Dim yPos As Single = yOrigin + y * (SQSizeY + WALL_THICKNESS) + WALL_THICKNESS \ 2 + CSng(SQSizeY) / 2

            Dim label As String = y.ToString()
            Dim yLabelSize As SizeF = g.MeasureString(label, font)
            g.DrawString(label, font, brush, xPos - yLabelSize.Width, yPos - yLabelSize.Height / 2.0F)
        Next

        font.Dispose()
        brush.Dispose()
    End Sub

    Friend Sub FillBorderWalls()
        For y As Integer = 0 To SQCOUNTY - 1
            verticalWalls(0)(y) = True
            verticalWalls(SQCOUNTX)(y) = True
        Next

        For x As Integer = 0 To SQCOUNTX - 1
            horizontalWalls(x)(0) = True
            horizontalWalls(x)(SQCOUNTY) = True
        Next
    End Sub

    Private Sub DrawItems(g As Graphics)
        For x As Integer = 0 To placedItems.Length - 1
            If placedItems(x) IsNot Nothing Then
                For y As Integer = 0 To placedItems(x).Length - 1
                    If placedItems(x)(y) IsNot Nothing Then
                        Dim img As Image = GetImageByKey(placedItems(x)(y).ImageKey)
                        If img IsNot Nothing Then
                            ImageAnimator.UpdateFrames(img)
                            Dim xPos As Integer = INDENT + x * (SQSizeX + WALL_THICKNESS) + WALL_THICKNESS \ 2
                            Dim yPos As Integer = INDENT + y * (SQSizeY + WALL_THICKNESS) + WALL_THICKNESS \ 2
                            Dim destRect As New Rectangle(xPos, yPos, SQSizeX, SQSizeY)

                            Dim imgAttributes As New Imaging.ImageAttributes()
                            imgAttributes.SetWrapMode(WrapMode.TileFlipXY)
                            g.DrawImage(img, destRect, 0, 0, img.Width, img.Height, GraphicsUnit.Pixel, imgAttributes)
                        End If
                    End If
                Next
            End If
        Next
    End Sub

    Private Sub DrawWallItems(g As Graphics)
        For x As Integer = 0 To verticalWallItems.Length - 1
            If verticalWallItems(x) IsNot Nothing Then
                For y As Integer = 0 To verticalWallItems(x).Length - 1
                    If verticalWallItems(x)(y) IsNot Nothing Then
                        Dim img As Image = GetImageByKey(verticalWallItems(x)(y).ImageKey)
                        If img IsNot Nothing Then
                            ImageAnimator.UpdateFrames(img)
                            Dim wallX As Integer = INDENT + x * (SQSizeX + WALL_THICKNESS) - (WALL_THICKNESS \ 2)
                            Dim wallY As Integer = INDENT + y * (SQSizeY + WALL_THICKNESS) + (WALL_THICKNESS \ 2)
                            Dim wallWidth As Integer = WALL_THICKNESS
                            Dim wallHeight As Integer = SQSizeY

                            Dim newWidth As Integer = img.Width
                            Dim newHeight As Integer = wallHeight

                            Dim centeredX As Integer = wallX + (wallWidth - newWidth) \ 2
                            Dim drawRect As New Rectangle(centeredX, wallY, newWidth, newHeight)
                            g.DrawImage(img, drawRect)
                        End If
                    End If
                Next
            End If
        Next

        For x As Integer = 0 To horizontalWallItems.Length - 1
            If horizontalWallItems(x) IsNot Nothing Then
                For y As Integer = 0 To horizontalWallItems(x).Length - 1
                    If horizontalWallItems(x)(y) IsNot Nothing Then
                        Dim img As Image = GetImageByKey(horizontalWallItems(x)(y).ImageKey)
                        If img IsNot Nothing Then
                            ImageAnimator.UpdateFrames(img)
                            Dim wallX As Integer = INDENT + x * (SQSizeX + WALL_THICKNESS) + (WALL_THICKNESS \ 2)
                            Dim wallY As Integer = INDENT + y * (SQSizeY + WALL_THICKNESS) - (WALL_THICKNESS \ 2)
                            Dim wallWidth As Integer = SQSizeX
                            Dim wallHeight As Integer = WALL_THICKNESS

                            Dim newWidth As Integer = wallWidth
                            Dim newHeight As Integer = img.Height

                            Dim centeredY As Integer = wallY + (wallHeight - newHeight) \ 2
                            Dim drawRect As New Rectangle(wallX, centeredY, newWidth, newHeight)
                            g.DrawImage(img, drawRect)
                        End If
                    End If
                Next
            End If
        Next
    End Sub

    Private Sub DrawHighlight(g As Graphics)
        If Not isMouseInsideGrid OrElse highlightedX < 0 OrElse highlightedY < 0 OrElse Not isCursorOnPicGame Then
            Return
        End If

        Using highlightPen As New Pen(highlightColor, 2) With {.DashStyle = DashStyle.Dash}
            If highlightedWallX Then
                Dim x As Integer = INDENT + highlightedX * (SQSizeX + WALL_THICKNESS) - WALL_THICKNESS \ 2
                Dim y As Integer = INDENT + highlightedY * (SQSizeY + WALL_THICKNESS) + WALL_THICKNESS \ 2
                Dim rect As New Rectangle(x, y, WALL_THICKNESS, SQSizeY)
                g.DrawRectangle(highlightPen, rect)
            ElseIf highlightedWallY Then
                Dim x As Integer = INDENT + highlightedX * (SQSizeX + WALL_THICKNESS) + WALL_THICKNESS \ 2
                Dim y As Integer = INDENT + highlightedY * (SQSizeY + WALL_THICKNESS) - WALL_THICKNESS \ 2
                Dim rect As New Rectangle(x, y, SQSizeX, WALL_THICKNESS)
                g.DrawRectangle(highlightPen, rect)
            Else
                Dim x As Integer = INDENT + highlightedX * (SQSizeX + WALL_THICKNESS) + WALL_THICKNESS \ 2
                Dim y As Integer = INDENT + highlightedY * (SQSizeY + WALL_THICKNESS) + WALL_THICKNESS \ 2
                Dim rect As New Rectangle(x, y, SQSizeX, SQSizeY)
                g.DrawRectangle(highlightPen, rect)
            End If
        End Using
    End Sub
    Private Sub UpdateHighlight(mouseX As Integer, mouseY As Integer)
        mouseX -= INDENT
        mouseY -= INDENT

        isMouseInsideGrid = False
        highlightedWallX = False
        highlightedWallY = False
        highlightedX = -1
        highlightedY = -1

        Dim cellSizeX As Integer = SQSizeX + WALL_THICKNESS
        Dim cellSizeY As Integer = SQSizeY + WALL_THICKNESS
        Dim cellX As Integer = mouseX \ cellSizeX
        Dim cellY As Integer = mouseY \ cellSizeY

        If cellX >= 0 AndAlso cellX <= SQCOUNTX AndAlso
       cellY >= 0 AndAlso cellY <= SQCOUNTY Then

            Dim offsetX As Integer = mouseX Mod cellSizeX
            Dim offsetY As Integer = mouseY Mod cellSizeY

            highlightedWallX = offsetX < WALL_THICKNESS
            highlightedWallY = offsetY < WALL_THICKNESS
            highlightedX = cellX
            highlightedY = cellY

            isMouseInsideGrid = True
        End If

        If highlightedX < 0 Then highlightedX = 0
        If highlightedX > SQCOUNTX Then highlightedX = SQCOUNTX
        If highlightedY < 0 Then highlightedY = 0
        If highlightedY > SQCOUNTY Then highlightedY = SQCOUNTY

        If highlightedWallX AndAlso (highlightedX = 0 OrElse highlightedX = SQCOUNTX) Then
            highlightedWallX = True
        End If

        If highlightedWallY AndAlso (highlightedY = 0 OrElse highlightedY = SQCOUNTY) Then
            highlightedWallY = True
        End If
    End Sub

#End Region

#Region " Colours "
    Private Sub UpdateColorPickers()
        If rdoWalls.Checked Then
            ' Set color pickers to wall colors
            colPattern.SelectedColor = wallsColor1
            colBackground.SelectedColor = wallsColor2
        ElseIf rdoFloors.Checked Then
            ' Set color pickers to floor colors
            colPattern.SelectedColor = floorsColor1
            colBackground.SelectedColor = floorsColor2
        End If
    End Sub

    Public Sub UpdateGameColors(senderObject As Object, newColor As Color)
        If rdoWalls.Checked Then
            ' Update wall colors
            If senderObject Is colPattern Then
                wallsColor1 = newColor
            ElseIf senderObject Is colBackground Then
                wallsColor2 = newColor
            End If
        ElseIf rdoFloors.Checked Then
            ' Update floor colors
            If senderObject Is colPattern Then
                floorsColor1 = newColor
            ElseIf senderObject Is colBackground Then
                floorsColor2 = newColor
            End If
        End If

        ' Redraw the game area to reflect changes
        picGame.Invalidate()
    End Sub

    Private Sub colPattern_ColorChanged(sender As Object, e As EventArgs) Handles colPattern.ColorChanged
        UpdateGameColors(colPattern, colPattern.SelectedColor)
    End Sub

    Private Sub colBackground_ColorChanged(sender As Object, e As EventArgs) Handles colBackground.ColorChanged
        UpdateGameColors(colBackground, colBackground.SelectedColor)
    End Sub
#End Region

#Region " Undo, Redo "
    Private Sub SaveStateForUndo()
        If isRestoringState Then Return
        undoStack.Push(New RoomState(Me))
        If undoStack.Count > 50 Then
            undoStack = New Stack(Of RoomState)(undoStack.Reverse().Take(50))
        End If
    End Sub

    Private Sub SaveState(isNewAction As Boolean)
        If isRestoringState Then Return
        If isNewAction Then
            redoStack.Clear()
        End If
        undoStack.Push(New RoomState(Me))
        If undoStack.Count > 50 Then
            undoStack = New Stack(Of RoomState)(undoStack.Reverse().Take(50))
        End If
    End Sub
    Private Sub BtnUndo_Click(sender As Object, e As EventArgs) Handles btnUndo.Click
        If undoStack.Count > 1 Then
            ' Save the current state for redo before performing undo
            SaveStateForRedo()

            ' Pop the current state from the undo stack
            undoStack.Pop()

            ' Restore the previous state
            isRestoringState = True
            Dim previousState As RoomState = undoStack.Peek()
            previousState.RestoreState(Me)
            isRestoringState = False

            ' Update the UI to reflect the restored state
            UpdateGridSizeUI()
            UpdateSelections()
            picGame.Invalidate()
        End If
    End Sub

    Private Sub SaveStateForRedo()
        If isRestoringState Then Return
        redoStack.Push(New RoomState(Me))
        If redoStack.Count > 50 Then
            redoStack = New Stack(Of RoomState)(redoStack.Reverse().Take(50))
        End If
    End Sub

    Private Sub BtnRedo_Click(sender As Object, e As EventArgs) Handles btnRedo.Click
        If redoStack.Count > 0 Then
            SaveStateForUndo()
            isRestoringState = True
            Dim redoState As RoomState = redoStack.Pop()
            redoState.RestoreState(Me)
            isRestoringState = False
            UpdateGridSizeUI()
            UpdateSelections()
            picGame.Invalidate()
        End If
    End Sub

    Private Sub FrmDesigner_KeyDown(sender As Object, e As KeyEventArgs) Handles Me.KeyDown
        ' Check for Ctrl+Z (Undo)
        If e.Control AndAlso e.KeyCode = Keys.Z Then
            BtnUndo_Click(sender, e)
            e.SuppressKeyPress = True ' Prevent further processing
        End If

        ' Check for Ctrl+Y (Redo)
        If e.Control AndAlso e.KeyCode = Keys.Y Then
            BtnRedo_Click(sender, e)
            e.SuppressKeyPress = True
        End If
    End Sub
#End Region

#Region " ToolStrip Buttons "
    Private Sub BtnFillDeadEnds_Click(sender As Object, e As EventArgs) Handles btnFillDeadEnds.Click
        If Not isRestoringState Then SaveStateForUndo()
        FillDeadEnds()
    End Sub
    Private Sub FillDeadEnds()
        If Not isRestoringState Then SaveStateForUndo()
        Dim wallCount As Integer = 0

        ' Loop through each square in the grid
        For y As Integer = 0 To SQCOUNTY - 1
            For x As Integer = 0 To SQCOUNTX - 1
                wallCount = 0
                Dim isFlipperPresent As Boolean = False ' To track if any flippers are present

                ' Count the walls around the square at (x, y)
                If x = 0 OrElse (x > 0 AndAlso (verticalWalls(x)(y) OrElse IsFlipperItem(verticalWallItems(x)(y)))) Then
                    wallCount += 1  ' Check vertical wall on the left
                    If IsFlipperItem(verticalWallItems(x)(y)) Then isFlipperPresent = True
                End If
                If x = SQCOUNTX - 1 OrElse (x < SQCOUNTX AndAlso (verticalWalls(x + 1)(y) OrElse IsFlipperItem(verticalWallItems(x + 1)(y)))) Then
                    wallCount += 1  ' Check vertical wall on the right
                    If IsFlipperItem(verticalWallItems(x + 1)(y)) Then isFlipperPresent = True
                End If
                If y = 0 OrElse (y > 0 AndAlso (horizontalWalls(x)(y) OrElse IsFlipperItem(horizontalWallItems(x)(y)))) Then
                    wallCount += 1  ' Check horizontal wall on the top
                    If IsFlipperItem(horizontalWallItems(x)(y)) Then isFlipperPresent = True
                End If
                If y = SQCOUNTY - 1 OrElse (y < SQCOUNTY AndAlso (horizontalWalls(x)(y + 1) OrElse IsFlipperItem(horizontalWallItems(x)(y + 1)))) Then
                    wallCount += 1  ' Check horizontal wall on the bottom
                    If IsFlipperItem(horizontalWallItems(x)(y + 1)) Then isFlipperPresent = True
                End If

                ' Check if the square is not occupied, has three walls, and does not contain a flipper
                If wallCount = 3 AndAlso Not isFlipperPresent AndAlso placedItems(x)(y) Is Nothing Then
                    placedItems(x)(y) = New PlacedItem() With {.ImageKey = "picCoin"}
                End If
            Next
        Next

        ' Refresh the game panel to show changes
        picGame.Invalidate()
    End Sub

    Private Sub BtnTest_Click(sender As Object, e As EventArgs) Handles btnTest.Click
        Dim tempFilePath As String = Path.Combine(Path.GetTempPath(), "temp.room")
        SaveRoomToFile(tempFilePath)

        PauseBackgroundTasks()

        Dim gameForm As New frmGame()
        gameForm.RoomFilePath = tempFilePath
        AddHandler gameForm.FormClosed, AddressOf OnGameFormClosed
        gameForm.Show()
    End Sub

    Private Sub BtnTriggerEditor_Click(sender As Object, e As EventArgs) Handles btnTriggerEditor.Click
        PauseBackgroundTasks()
        Dim frm As New frmTriggerEditor()
        frm.ShowDialog()
    End Sub

    Private Sub BtnAudio_Click(sender As Object, e As EventArgs) Handles btnAudio.Click, lblAudio.Click
        Dim selectedMusicParts As String() = SelectedMusic.Split(New String() {", V:", ", G:"}, StringSplitOptions.None)
        If selectedMusicParts.Length = 3 Then
            Dim audioFile As String = selectedMusicParts(0).Trim()
            Dim volume As Integer = Integer.Parse(selectedMusicParts(1).Trim())
            Dim gain As Integer = Integer.Parse(selectedMusicParts(2).Trim())
            PauseBackgroundTasks()
            Using frm As New frmMusic With {
    .InitialVolume = volume,
    .InitialGain = gain,
    .InitialSelectedTrack = audioFile
}
                If frm.ShowDialog() = DialogResult.OK Then
                    Dim returnedVolume As Integer = frm.VolumeLevel
                    Dim returnedGain As Integer = frm.GainLevel
                    Dim returnedAudioFile As String = frm.AudioFile

                    SelectedMusic = String.Format("{0}, V:{1}, G:{2}", returnedAudioFile, returnedVolume, returnedGain)

                    Dim fileNameWithoutExtension As String = Path.GetFileNameWithoutExtension(returnedAudioFile)
                    lblAudio.Text = String.Format("{0}, V:{1}, G:{2}", fileNameWithoutExtension, returnedVolume, returnedGain)
                End If
            End Using
        Else
            MessageBox.Show("SelectedMusic string is not in the expected format.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
        End If
    End Sub

#End Region

#Region " Calculations "
    Private Function IsHorizontalWallConnectedToEdge(pt As Point) As Boolean
        Dim x As Integer = pt.X
        Dim y As Integer = pt.Y

        If y > 0 AndAlso floorsUseEdgeStyle(x)(y - 1) Then Return True
        If y < SQCOUNTY AndAlso floorsUseEdgeStyle(x)(y) Then Return True

        Return False
    End Function

    Private Function IsVerticalWallConnectedToEdge(pt As Point) As Boolean
        Dim x As Integer = pt.X
        Dim y As Integer = pt.Y

        If x > 0 AndAlso floorsUseEdgeStyle(x - 1)(y) Then Return True
        If x < SQCOUNTX AndAlso floorsUseEdgeStyle(x)(y) Then Return True

        Return False
    End Function

    Private Sub CalculateSquareSizes(clientWidth As Integer, clientHeight As Integer)
        If SQCOUNTX <= 0 OrElse SQCOUNTY <= 0 Then
            Throw New InvalidOperationException("Grid dimensions must be greater than zero.")
        End If

        SQSizeX = (clientWidth - 2 * INDENT - (SQCOUNTX + 1) * WALL_THICKNESS) \ SQCOUNTX
        SQSizeY = (clientHeight - 2 * INDENT - (SQCOUNTY + 1) * WALL_THICKNESS) \ SQCOUNTY
    End Sub

    Private Function GetRectangle(p1 As Point, p2 As Point) As Rectangle
        Dim x As Integer = Math.Min(p1.X, p2.X)
        Dim y As Integer = Math.Min(p1.Y, p2.Y)
        Dim width As Integer = Math.Abs(p1.X - p2.X)
        Dim height As Integer = Math.Abs(p1.Y - p2.Y)
        Return New Rectangle(x, y, width, height)
    End Function

    Private Function GetCellsInRectangle(rect As Rectangle) As List(Of Point)
        Dim selectedCells As New List(Of Point)
        For x As Integer = 0 To SQCOUNTX - 1
            For y As Integer = 0 To SQCOUNTY - 1
                Dim cellRect As Rectangle = GetCellRectangle(x, y)
                If rect.IntersectsWith(cellRect) Then
                    selectedCells.Add(New Point(x, y))
                End If
            Next
        Next
        Return selectedCells
    End Function

    Private Function GetCellRectangle(x As Integer, y As Integer) As Rectangle
        Dim xOrigin As Integer = INDENT
        Dim yOrigin As Integer = INDENT
        Return New Rectangle(
        xOrigin + x * (SQSizeX + WALL_THICKNESS) + WALL_THICKNESS \ 2,
        yOrigin + y * (SQSizeY + WALL_THICKNESS) + WALL_THICKNESS \ 2,
        SQSizeX,
        SQSizeY)
    End Function

    Private Function GetVerticalWallsInRectangle(rect As Rectangle) As List(Of Point)
        Dim selectedWalls As New List(Of Point)
        For x As Integer = 0 To SQCOUNTX
            For y As Integer = 0 To SQCOUNTY - 1
                Dim wallRect As Rectangle = GetVerticalWallRectangle(x, y)
                If rect.IntersectsWith(wallRect) Then
                    selectedWalls.Add(New Point(x, y))
                End If
            Next
        Next
        Return selectedWalls
    End Function

    Private Function GetVerticalWallRectangle(x As Integer, y As Integer) As Rectangle
        Dim xOrigin As Integer = INDENT
        Dim yOrigin As Integer = INDENT
        Return New Rectangle(
        xOrigin + x * (SQSizeX + WALL_THICKNESS) - WALL_THICKNESS \ 2,
        yOrigin + y * (SQSizeY + WALL_THICKNESS) + WALL_THICKNESS \ 2,
        WALL_THICKNESS, SQSizeY)
    End Function

    Private Function GetHorizontalWallsInRectangle(rect As Rectangle) As List(Of Point)
        Dim selectedWalls As New List(Of Point)
        For x As Integer = 0 To SQCOUNTX - 1
            For y As Integer = 0 To SQCOUNTY
                Dim wallRect As Rectangle = GetHorizontalWallRectangle(x, y)
                If rect.IntersectsWith(wallRect) Then
                    selectedWalls.Add(New Point(x, y))
                End If
            Next
        Next
        Return selectedWalls
    End Function

    Private Function GetHorizontalWallRectangle(x As Integer, y As Integer) As Rectangle
        Dim xOrigin As Integer = INDENT
        Dim yOrigin As Integer = INDENT
        Return New Rectangle(
        xOrigin + x * (SQSizeX + WALL_THICKNESS) + WALL_THICKNESS \ 2,
        yOrigin + y * (SQSizeY + WALL_THICKNESS) - WALL_THICKNESS \ 2,
        SQSizeX, WALL_THICKNESS)
    End Function

    Private Sub ReturnItemToOriginalLocation()
        If draggedItemIsWall Then
            If draggedItemOriginalX >= 0 AndAlso draggedItemOriginalY >= 0 Then
                If draggedItemIsVerticalWall Then
                    verticalWallItems(draggedItemOriginalX)(draggedItemOriginalY) = draggedItem
                    verticalWalls(draggedItemOriginalX)(draggedItemOriginalY) = False
                Else
                    horizontalWallItems(draggedItemOriginalX)(draggedItemOriginalY) = draggedItem
                    horizontalWalls(draggedItemOriginalX)(draggedItemOriginalY) = False
                End If
            End If
        Else
            If draggedItemOriginalX >= 0 AndAlso draggedItemOriginalY >= 0 Then
                placedItems(draggedItemOriginalX)(draggedItemOriginalY) = draggedItem
            End If
        End If
    End Sub

    Private Function GetImageByKey(imageKey As String) As Image
        Select Case imageKey
            Case "picBlock1"
                Return picBlock1.Image
            Case "picBaddy1"
                Return picBaddy1.Image
            Case "picBaddy2"
                Return picBaddy2.Image
            Case "picBaddy3"
                Return picBaddy3.Image
            Case "picBaddy4"
                Return picBaddy4.Image
            Case "picLazer1"
                Return picLazer1.Image
            Case "picLazer2"
                Return picLazer2.Image
            Case "picFlipper1"
                Return picFlipper1.Image
            Case "picFlipper2"
                Return picFlipper2.Image
            Case "picFlipper3"
                Return picFlipper3.Image
            Case "picFlipper4"
                Return picFlipper4.Image
            Case "picCoin"
                Return picCoin.Image
            Case "picGate"
                Return picGate.Image
            Case "picKey"
                Return picKey.Image
            Case "picStart"
                Return picStart.Image
            Case "picFinish"
                Return picFinish.Image
            Case "picBlockStopper1"
                Return picBlockStopper1.Image
            Case "picBall"
                Return picBall.Image
            Case "picBlockSwitch"
                Return picBlockSwitch.Image
            Case "picBomb"
                Return picBomb.Image
            Case "picWarp"
                Return picWarp.Image
            Case "picWarp2"
                Return picWarp2.Image
            Case Else
                Return Nothing
        End Select
    End Function

    Private Function IsVerticalItem(imgKey As String) As Boolean
        Return imgKey = "picLazer1" OrElse imgKey = "picFlipper1" OrElse imgKey = "picFlipper2"
    End Function

    Private Function IsHorizontalItem(imgKey As String) As Boolean
        Return imgKey = "picLazer2" OrElse imgKey = "picFlipper3" OrElse imgKey = "picFlipper4"
    End Function

    Private Function IsFlipperItem(imgKey As String) As Boolean
        Return imgKey = "picFlipper1" OrElse imgKey = "picFlipper2" OrElse imgKey = "picFlipper3" OrElse imgKey = "picFlipper4"
    End Function

    Private Function IsFlipperItem(item As PlacedItem) As Boolean
        If item Is Nothing Then Return False
        Return item.ImageKey = "picFlipper1" OrElse item.ImageKey = "picFlipper2" OrElse item.ImageKey = "picFlipper3" OrElse item.ImageKey = "picFlipper4"
    End Function

    Private Function ParseColor(colorString As String) As Color
        Dim parts() As String = colorString.Split(","c)
        If parts.Length = 4 Then
            Dim a, r, g, b As Integer
            If Integer.TryParse(parts(0), a) AndAlso Integer.TryParse(parts(1), r) AndAlso
   Integer.TryParse(parts(2), g) AndAlso Integer.TryParse(parts(3), b) Then
                Return Color.FromArgb(a, r, g, b)
            End If
        End If
        Return Color.Black
    End Function

    Private Function ColorToString(color As Color) As String
        Return $"{color.A},{color.R},{color.G},{color.B}"
    End Function

    Private Sub PauseBackgroundTasks()
        animationTimer.Stop()
        highlightTimer.Stop()
    End Sub

    Private Sub ResumeBackgroundTasks()
        animationTimer.Start()
        highlightTimer.Start()
    End Sub

    Private Sub OnGameFormClosed(sender As Object, e As FormClosedEventArgs)
        ResumeBackgroundTasks()
    End Sub

    Private Function CloneJaggedArray(Of T)(sourceArray As T()()) As T()()
        Dim lengthOuter As Integer = sourceArray.Length
        Dim newArray As T()() = New T(lengthOuter - 1)() {}
        For i As Integer = 0 To lengthOuter - 1
            If sourceArray(i) IsNot Nothing Then
                Dim lengthInner As Integer = sourceArray(i).Length
                newArray(i) = New T(lengthInner - 1) {}
                Array.Copy(sourceArray(i), newArray(i), lengthInner)
            End If
        Next
        Return newArray
    End Function

    Private Function ConvertPlacedItemsToStrings(items As PlacedItem()()) As String()()
        Dim lengthOuter As Integer = items.Length
        Dim stringItems As String()() = New String(lengthOuter - 1)() {}
        For x As Integer = 0 To lengthOuter - 1
            If items(x) IsNot Nothing Then
                Dim lengthInner As Integer = items(x).Length
                stringItems(x) = New String(lengthInner - 1) {}
                For y As Integer = 0 To lengthInner - 1
                    If items(x)(y) IsNot Nothing Then
                        stringItems(x)(y) = items(x)(y).ImageKey
                    Else
                        stringItems(x)(y) = Nothing
                    End If
                Next
            End If
        Next
        Return stringItems
    End Function

#End Region

End Class


Can you go through this and as many comments as you can?