How can I refactor this C# code to improve readability and align with C# coding standards
using System.Collections.Generic;
using Oxide.Core.Plugins;
using Oxide.Game.Rust.Cui;
using UnityEngine;

namespace Oxide.Plugins
{
    [Info("QuarryComputerUi", "Marte6", "1.0.0")]
    public class QuarryComputerUi : RustPlugin
    {
        [PluginReference]
        Plugin ImageLibrary;

        private static readonly HashSet<BasePlayer> playersWithPopup = new();

        #region Initialization

        private void Init()
        {
            Ui.DestroyAll();
        }

        #endregion

        #region Commands

        [ChatCommand("ui")]
        private void CmdOpenUi(BasePlayer player)
        {
            Ui.Destroy(player);
            Ui.Create(player, ImageLibrary);
        }

        [ConsoleCommand("quarrycompui.close")]
        private void CmdClose(ConsoleSystem.Arg arg)
        {
            var player = arg.Player();
            if (player != null)
            {
                Ui.Destroy(player);
                PrintToChat(player, "Close button clicked.");
            }
        }

        [ConsoleCommand("quarrycompui.remove")]
        private void CmdRemoveQuarry(ConsoleSystem.Arg arg)
        {
            var player = arg.Player();
            TogglePopup(player, "Remove the Quarry?", "quarrycompui.confirmremove", "quarrycompui.cancelremove");
        }

        [ConsoleCommand("quarrycompui.confirmremove")]
        private void CmdConfirmRemove(ConsoleSystem.Arg arg)
        {
            var player = arg.Player();
            if (player != null)
            {
                Ui.ClosePopup(player);
                PrintToChat(player, "Quarry removed.");
            }
        }

        [ConsoleCommand("quarrycompui.cancelremove")]
        private void CmdCancelRemove(ConsoleSystem.Arg arg)
        {
            ClosePopupAndNotify(arg.Player(), "Removal cancelled.");
        }

        [ConsoleCommand("quarrycompui.upgrade")]
        private void CmdUpgradeQuarry(ConsoleSystem.Arg arg)
        {
            var player = arg.Player();
            TogglePopup(player, "Upgrade the Quarry?", "quarrycompui.confirmupgrade", "quarrycompui.cancelupgrade");
        }

        [ConsoleCommand("quarrycompui.confirmupgrade")]
        private void CmdConfirmUpgrade(ConsoleSystem.Arg arg)
        {
            var player = arg.Player();
            if (player != null)
            {
                Ui.ClosePopup(player);
                PrintToChat(player, "Quarry upgraded.");
            }
        }

        [ConsoleCommand("quarrycompui.cancelupgrade")]
        private void CmdCancelUpgrade(ConsoleSystem.Arg arg)
        {
            ClosePopupAndNotify(arg.Player(), "Upgrade cancelled.");
        }

        #endregion

        private void TogglePopup(BasePlayer player, string message, string confirmCmd, string cancelCmd)
        {
            if (player != null && !playersWithPopup.Contains(player))
            {
                playersWithPopup.Add(player);
                Ui.ShowPopup(player, message, confirmCmd, cancelCmd);
            }
        }

        private void ClosePopupAndNotify(BasePlayer player, string message)
        {
            if (player != null)
            {
                Ui.ClosePopup(player);
                PrintToChat(player, message);
            }
        }

        #region UI Configuration

        public static class Ui
        {
            public static class Cfg
            {
                public static readonly Dictionary<string, string> Comps =
                    new()
                    {
                        { "Bg", "QuarryCompUi_Background" },
                        { "MainPanel", "QuarryCompUi_MainPanel" },
                        { "OvrlBlk", "Overlay_Block" },
                        { "PopShd", "Popup_Shadow" },
                        { "PopBdr", "Popup_Border" },
                        { "PopBg", "Popup_Background" },
                        { "ClsBtn", "QuarryCompUi_Close" },
                        { "QryPanel", "QuarryCompUi_Full_Left" },
                        { "UpgPanel", "QuarryCompUi_Full_Right" },
                    };

                public static readonly Dictionary<string, string> Colors =
                    new()
                    {
                        { "Gray", "0.5 0.5 0.5 0.9" },
                        { "LightGray", "0.60 0.60 0.60 0.95" },
                        { "DarkGray", "0.25 0.25 0.25 0.95" },
                        { "Red", "1 0 0 1" },
                        { "DarkRed", "0.55 0 0 1" },
                        { "Black90", "0 0 0 0.9" },
                        { "Black85", "0 0 0 0.85" },
                        { "Black97", "0 0 0 0.97" },
                        { "Blue", "0 0 1 1" },
                        { "White", "1 1 1 1" },
                        { "White80", "0.8 0.8 0.8 1" },
                        { "White50", "1 1 1 0.5" },
                        { "Green", "0 1 0 1" },
                        { "Crimson", "0.86 0.08 0.24 1" },
                    };
            }

            public static void Create(BasePlayer player, Plugin imageLibrary)
            {
                var container = new CuiElementContainer();
                AddPanel(container, "0 0", "1 1", Cfg.Comps["Bg"], color: Cfg.Colors["Black90"], isCursorEnabled: true);
                AddMain(container);
                AddCloseBtn(container, Cfg.Comps["MainPanel"]);
                AddImg(container, Cfg.Comps["Bg"], "crude.oil", "0.1 0.1", "0.2 0.2", "ResImg", imageLibrary);
                CuiHelper.AddUi(player, container);
            }

            public static void Destroy(BasePlayer player)
            {
                if (player == null)
                    return;

                foreach (var elem in Cfg.Comps)
                    CuiHelper.DestroyUi(player, elem.Value);

                playersWithPopup.Remove(player);
            }

            public static void DestroyAll()
            {
                foreach (var player in BasePlayer.activePlayerList)
                    Destroy(player);
            }

            public static void ShowPopup(BasePlayer player, string message, string confirmCmd, string cancelCmd)
            {
                var container = new CuiElementContainer();
                AddPanel(container, "0 0", "1 1", Cfg.Comps["OvrlBlk"], "Overlay", Cfg.Colors["Black90"], isCursorEnabled: true);
                AddPanel(container, "0.4 0.4", "0.6 0.6", Cfg.Comps["PopShd"], Cfg.Comps["OvrlBlk"], Cfg.Colors["Black85"]);
                AddPanel(container, "0.0 0.09", "0.95 1.0", Cfg.Comps["PopBdr"], Cfg.Comps["PopShd"], Cfg.Colors["White"]);
                AddPanel(container, "0.01 0.01", "0.991 0.985", Cfg.Comps["PopBg"], Cfg.Comps["PopBdr"], Cfg.Colors["Black97"]);
                AddTxt(container, Cfg.Comps["PopBg"], "0.1 0.6", "0.9 0.9", message, 16, TextAnchor.MiddleCenter);
                AddBtn(container, Cfg.Comps["PopBg"], "Yes", confirmCmd, "0.25", "0.05", "0.45", "0.15", Cfg.Colors["LightGray"], Cfg.Colors["Green"]);
                AddBtn(container, Cfg.Comps["PopBg"], "No", cancelCmd, "0.55", "0.05", "0.75", "0.15", Cfg.Colors["LightGray"], Cfg.Colors["Red"]);
                CuiHelper.AddUi(player, container);
            }

            public static void ClosePopup(BasePlayer player)
            {
                foreach (var elem in Cfg.Comps)
                    if (elem.Key.StartsWith("Popup") || elem.Value == Cfg.Comps["OvrlBlk"])
                        CuiHelper.DestroyUi(player, elem.Value);

                playersWithPopup.Remove(player);
            }

            private static void AddMain(CuiElementContainer container)
            {
                AddPanel(container, "0.235 0.26", "0.765 0.724", Cfg.Comps["MainPanel"], Cfg.Comps["Bg"], Cfg.Colors["LightGray"], true);
                AddQuarryPanel(container);
                AddUpgradePanel(container);
            }

            private static void AddQuarryPanel(CuiElementContainer container)
            {
                AddPanel(container, "0.0 0", "0.5 1", Cfg.Comps["QryPanel"], Cfg.Comps["MainPanel"], Cfg.Colors["Black97"]);
                AddInnerSquare(container, Cfg.Comps["QryPanel"], "0.10 0.05", "0.95 0.90", Cfg.Colors["Black97"]);
                AddInnerSquare(container, Cfg.Comps["QryPanel"], "0.054 0.1033", "0.895 0.945", Cfg.Colors["White80"]);
                AddInnerSquare(container, Cfg.Comps["QryPanel"], "0.06 0.108", "0.89 0.94", Cfg.Colors["DarkRed"]);
                AddInnerSquare(container, Cfg.Comps["QryPanel"], "0.06 0.865", "0.89 0.870", Cfg.Colors["White80"]);
                AddTxt(container, Cfg.Comps["QryPanel"], "0.1 0.84", "0.9 0.98", "Quarry Level", 15, TextAnchor.MiddleCenter);
                AddSep(container, Cfg.Comps["QryPanel"], "0.06 0.82", "0.89 0.825");
                AddTxt(container, Cfg.Comps["QryPanel"], "0.1 0.78", "0.9 0.82", "Extraction Settings:", 12, TextAnchor.MiddleLeft);
                AddTxt(container, Cfg.Comps["QryPanel"], "0.1 0.74", "0.9 0.78", "Extraction Interval: 1 sec", 10, TextAnchor.MiddleLeft);
                AddTxt(container, Cfg.Comps["QryPanel"], "0.1 0.7", "0.9 0.74", "Fuel/extraction: 1 LG Fuel", 10, TextAnchor.MiddleLeft);
                AddSep(container, Cfg.Comps["QryPanel"], "0.06 0.65", "0.89 0.655");
                AddTxt(container, Cfg.Comps["QryPanel"], "0.1 0.6", "0.9 0.65", "Storage:", 12, TextAnchor.MiddleLeft);
                AddTxt(container, Cfg.Comps["QryPanel"], "0.1 0.56", "0.9 0.6", "Fuel Storage: 3 slots", 10, TextAnchor.MiddleLeft);
                AddTxt(container, Cfg.Comps["QryPanel"], "0.1 0.52", "0.9 0.56", "Resource Storage: 6 slots", 10, TextAnchor.MiddleLeft);
                AddSep(container, Cfg.Comps["QryPanel"], "0.06 0.47", "0.89 0.475");
                AddTxt(container, Cfg.Comps["QryPanel"], "0.1 0.42", "0.9 0.47", "Resources/Extraction:", 12, TextAnchor.MiddleLeft);
                AddTxt(container, Cfg.Comps["QryPanel"], "0.1 0.38", "0.9 0.42", "Crude Oil: 10", 10, TextAnchor.MiddleLeft);
                AddTxt(container, Cfg.Comps["QryPanel"], "0.1 0.34", "0.9 0.38", "HQM Ore: 60", 10, TextAnchor.MiddleLeft);
                AddTxt(container, Cfg.Comps["QryPanel"], "0.1 0.3", "0.9 0.34", "Metal Ore: 100", 10, TextAnchor.MiddleLeft);
                AddTxt(container, Cfg.Comps["QryPanel"], "0.1 0.26", "0.9 0.3", "Stones: 250", 10, TextAnchor.MiddleLeft);
                AddTxt(container, Cfg.Comps["QryPanel"], "0.1 0.22", "0.9 0.26", "Sulfur Ore: 160", 10, TextAnchor.MiddleLeft);
                AddBtn(container, Cfg.Comps["QryPanel"], "Remove Quarry", "quarrycompui.remove", "0.35", "0.11", "0.65", "0.16", Cfg.Colors["LightGray"], Cfg.Colors["Red"]);
            }

            private static void AddUpgradePanel(CuiElementContainer container)
            {
                AddPanel(container, "0.5 0", "1 1", Cfg.Comps["UpgPanel"], Cfg.Comps["MainPanel"], Cfg.Colors["Black97"]);
                AddInnerSquare(container, Cfg.Comps["UpgPanel"], "0.10 0.05", "0.95 0.90", Cfg.Colors["Black97"]);
                AddInnerSquare(container, Cfg.Comps["UpgPanel"], "0.054 0.1033", "0.895 0.945", Cfg.Colors["White80"]);
                AddInnerSquare(container, Cfg.Comps["UpgPanel"], "0.06 0.108", "0.89 0.94", Cfg.Colors["Blue"]);
                AddInnerSquare(container, Cfg.Comps["UpgPanel"], "0.06 0.865", "0.89 0.870", Cfg.Colors["White80"]);
                AddTxt(container, Cfg.Comps["UpgPanel"], "0.1 0.84", "0.9 0.98", "Upgrade to Next Level", 15, TextAnchor.MiddleCenter);
                AddSep(container, Cfg.Comps["UpgPanel"], "0.06 0.82", "0.89 0.825");
                AddTxt(container, Cfg.Comps["UpgPanel"], "0.1 0.78", "0.9 0.82", "Requirements:", 12, TextAnchor.MiddleLeft);
                AddTxt(container, Cfg.Comps["UpgPanel"], "0.1 0.74", "0.9 0.78", "Scrap: 5000", 10, TextAnchor.MiddleLeft);
                AddTxt(container, Cfg.Comps["UpgPanel"], "0.1 0.7", "0.9 0.74", "Bone Fragments: 10000", 10, TextAnchor.MiddleLeft);
                AddSep(container, Cfg.Comps["UpgPanel"], "0.06 0.65", "0.89 0.655");
                AddTxt(container, Cfg.Comps["UpgPanel"], "0.1 0.6", "0.9 0.65", "Upgrade Effects:", 12, TextAnchor.MiddleLeft);
                AddTxt(container, Cfg.Comps["UpgPanel"], "0.1 0.56", "0.9 0.6", "Fuel Storage: 6 slots", 10, TextAnchor.MiddleLeft);
                AddTxt(container, Cfg.Comps["UpgPanel"], "0.1 0.52", "0.9 0.56", "Resource Storage: 12 slots", 10, TextAnchor.MiddleLeft);
                AddSep(container, Cfg.Comps["UpgPanel"], "0.06 0.47", "0.89 0.475");
                AddTxt(container, Cfg.Comps["UpgPanel"], "0.1 0.42", "0.9 0.47", "Crude Oil: 20", 10, TextAnchor.MiddleLeft);
                AddTxt(container, Cfg.Comps["UpgPanel"], "0.1 0.38", "0.9 0.42", "HQM Ore: 120", 10, TextAnchor.MiddleLeft);
                AddTxt(container, Cfg.Comps["UpgPanel"], "0.1 0.34", "0.9 0.38", "Metal Ore: 150", 10, TextAnchor.MiddleLeft);
                AddTxt(container, Cfg.Comps["UpgPanel"], "0.1 0.3", "0.9 0.34", "Stones: 350", 10, TextAnchor.MiddleLeft);
                AddTxt(container, Cfg.Comps["UpgPanel"], "0.1 0.26", "0.9 0.3", "Sulfur Ore: 200", 10, TextAnchor.MiddleLeft);
                AddBtn(container, Cfg.Comps["UpgPanel"], "Upgrade", "quarrycompui.upgrade", "0.35", "0.11", "0.65", "0.16", Cfg.Colors["LightGray"], Cfg.Colors["Green"]);
            }

            private static void AddSep(CuiElementContainer container, string parent, string anchorMin, string anchorMax)
            {
                AddInnerSquare(container, parent, anchorMin, anchorMax, Cfg.Colors["White80"]);
            }

            private static void AddPanel(
                CuiElementContainer container,
                string anchorMin,
                string anchorMax,
                string panelName,
                string parent = "Overlay",
                string color = "0 0 0 1",
                bool isCursorEnabled = false,
                bool isBackground = false
            )
            {
                var panel = new CuiPanel
                {
                    Image = { Color = color },
                    RectTransform = { AnchorMin = anchorMin, AnchorMax = anchorMax },
                    CursorEnabled = isCursorEnabled,
                };

                if (isBackground)
                {
                    panel.Image.Material = "assets/content/ui/uibackgroundblur.mat";
                    panel.Image.Sprite = "assets/content/ui/ui.background.transparent.radial.psd";
                }

                container.Add(panel, parent, panelName);
            }

            private static void AddInnerSquare(CuiElementContainer container, string parent, string anchorMin, string anchorMax, string color)
            {
                container.Add(new CuiPanel { Image = { Color = color }, RectTransform = { AnchorMin = anchorMin, AnchorMax = anchorMax } }, parent);
            }

            private static void AddTxt(CuiElementContainer container, string parent, string anchorMin, string anchorMax, string text, int fontSize, TextAnchor alignment)
            {
                container.Add(
                    new CuiLabel
                    {
                        Text =
                        {
                            Text = text,
                            FontSize = fontSize,
                            Font = "DroidSansMono.ttf",
                            Align = alignment,
                            Color = Cfg.Colors["White"],
                        },
                        RectTransform = { AnchorMin = anchorMin, AnchorMax = anchorMax },
                    },
                    parent
                );
            }

            private static void AddBtn(
                CuiElementContainer container,
                string parent,
                string text,
                string command,
                string anchorMinX,
                string anchorMinY,
                string anchorMaxX,
                string anchorMaxY,
                string backgroundColor,
                string textColor
            )
            {
                container.Add(
                    new CuiButton
                    {
                        Button =
                        {
                            Color = backgroundColor,
                            Command = command,
                            Close = "",
                        },
                        RectTransform = { AnchorMin = $"{anchorMinX} {anchorMinY}", AnchorMax = $"{anchorMaxX} {anchorMaxY}" },
                        Text =
                        {
                            Text = text,
                            FontSize = 14,
                            Align = TextAnchor.MiddleCenter,
                            Color = textColor,
                        },
                    },
                    parent
                );
            }

            private static void AddImg(CuiElementContainer container, string parent, string resourceName, string anchorMin, string anchorMax, string imageName, Plugin imageLibrary)
            {
                string imageUrl = imageLibrary?.Call("GetImage", resourceName) as string;
                if (imageUrl == null)
                {
                    Debug.LogError($"Failed to get image for item: {resourceName}");
                    return;
                }

                container.Add(
                    new CuiElement
                    {
                        Name = imageName,
                        Parent = parent,
                        Components =
                        {
                            new CuiRawImageComponent { Png = imageUrl },
                            new CuiRectTransformComponent { AnchorMin = anchorMin, AnchorMax = anchorMax },
                        },
                    }
                );
            }

            private static void AddCloseBtn(CuiElementContainer container, string parent)
            {
                container.Add(
                    new CuiButton
                    {
                        Button =
                        {
                            Color = Cfg.Colors["Red"],
                            Command = "quarrycompui.close",
                            Close = Cfg.Comps["Bg"],
                        },
                        RectTransform = { AnchorMin = "0.95 0.95", AnchorMax = "1 1" },
                        Text =
                        {
                            Text = "✖",
                            FontSize = 13,
                            Align = TextAnchor.MiddleCenter,
                            Color = Cfg.Colors["White50"],
                        },
                    },
                    parent,
                    Cfg.Comps["ClsBtn"]
                );
            }
        }

        #endregion
    }
}