SYSTEM: You are a Python 3.12 programmer, capable of analyzing problems in depth and explaining solutions in a clear and concise manner. Your responses prioritize code efficiency, readability, and simplicity. You leverage the latest Python features. When addressing tasks, you break them down into clear steps and present only essential information, ensuring users receive focused, expert guidance tailored to their needs. You only print the parts of the code you changed in a way that makes them easy to copy paste in the code base. USER: Currently the code saves all tables on start up which slows down the start and does not seem to have any good reason. Am i missing something is there a good reason?  Python 3.12 Code: import ctypes
import csv
import json
import tkinter as tk
from tkinter import filedialog, messagebox, simpledialog, ttk
from pathlib import Path
from tksheet import Sheet

def set_dpi_awareness():
    """Enable DPI awareness for high DPI settings."""
    try:
        ctypes.windll.shcore.SetProcessDpiAwareness(1)
    except Exception as e:
        print(f"Error setting DPI awareness: {e}")

class TableApp:
    """Table Editor application with a sidebar and table management."""

    def __init__(self, root: tk.Tk):
        """Initialize the TableApp."""
        self.root = root
        self.config_dimensions()
        self.config_fonts()
        self.config_colors()
        self.initialize_data()
        self.setup_ui()
        self.load_tables()

    #--- Configuration ---

    def config_dimensions(self):
        """Configure application dimensions."""
        self.root.title("Database")
        self.root.geometry("1920x1080")
        self.root.minsize(1435, 910)

        self.sidebar_width = 400
        self.static_frame_width = 100
        self.header_height = 190

    def config_fonts(self):
        """Configure application fonts."""
        font_name, font_size, font_style = "Literata", 12, "normal"
        self.default_font = (font_name, font_size, font_style)
        self.root.option_add("*Font", f"{font_name} {font_size}")

    def config_colors(self):
        """Configure application colors."""
        self.text_color = "#333333"
        self.background_color = "#FFFFFF"
        self.sidebar_color = "#F7F8FC"
        self.button_color = "#F7F8FC"
        self.button_color_selected = "#EAEDEF"
                             
    def setup_ui(self):
        """Set up the user interface components."""
        self.create_sidebar()
        self.create_main_frame()
        self.create_header_frame()
        self.create_table_frame()

    def create_sidebar(self):
        """Create the sidebar with navigation and actions."""
        sidebar = self._create_frame(
            parent=self.root,
            width=self.sidebar_width,
            bg=self.sidebar_color,
            side='left',
            anchor='nw',
            fill='y'
        )
        
        self._create_frame(
            parent=self.root,
            width=self.static_frame_width,
            bg=self.background_color,
            side='left',
            anchor='nw',
            fill='y'
        )
        sidebar.pack_propagate(False)

        self._add_normal_buttons(sidebar)
        self._add_scrollable_canvas(sidebar)
        self._add_delete_table_section(sidebar)

    def _create_frame(
        self,
        parent: tk.Widget,
        width: int | None,
        bg: str,
        side: str,
        anchor: str,
        fill: str,
        expand: bool = False
    ) -> tk.Frame:
        """Create and pack a frame with specified properties."""
        frame = tk.Frame(parent, width=width, bg=bg, bd=0, relief='flat')
        frame.pack(side=side, anchor=anchor, fill=fill, expand=expand)
        return frame

    def _add_normal_buttons(self, sidebar: tk.Frame):
        """Add navigation buttons to the sidebar."""
        normal_buttons_frame = self._create_frame(
            parent=sidebar,
            width=None,
            bg=self.sidebar_color,
            side='top',
            anchor='nw',
            fill='x',
        )

        create_table_label = self._create_clickable_label(
            parent=normal_buttons_frame,
            text="Create New Table",
            command=self.create_new_table,
            anchor='center'
        )
        create_table_label.pack(pady=10, anchor='center')
        self.add_custom_hover(create_table_label)

        self._add_separator(normal_buttons_frame)

    def _add_scrollable_canvas(self, sidebar: tk.Frame):
        """Add a scrollable canvas to display table labels."""
        scrollbar_frame = self._create_frame(
            parent=sidebar,
            width=None,
            bg=self.sidebar_color,
            side='top',
            anchor='nw',
            fill='both',
            expand=True
        )
    
        canvas = tk.Canvas(scrollbar_frame, bg=self.sidebar_color, highlightthickness=0, width=self.sidebar_width - 15)
        canvas.pack(side="left", fill="both", expand=True)

        self.config_scrollbar_style()

        scrollbar = ttk.Scrollbar(
            scrollbar_frame,
            orient="vertical",
            command=canvas.yview,
            style="Custom.Vertical.TScrollbar"
        )
        scrollbar.pack(side="right", fill="y")

        canvas.configure(yscrollcommand=scrollbar.set)

        self.table_labels_frame = tk.Frame(canvas, bg=self.sidebar_color)
        canvas.create_window((0, 0), window=self.table_labels_frame, anchor="nw")

        self._bind_scrollbar_events(canvas, scrollbar, scrollbar_frame)

    def _bind_scrollbar_events(self, canvas: tk.Canvas, scrollbar: ttk.Scrollbar, scrollbar_frame: tk.Frame):
        """Manage scrollbar visibility based on content size."""
        def configure_scrollbar(event: tk.Event | None = None):
            canvas.update_idletasks()
            canvas_height = scrollbar_frame.winfo_height()
            content_height = self.table_labels_frame.winfo_reqheight()

            if content_height > canvas_height:
                scrollbar.pack(side="right", fill="y")
            else:
                scrollbar.pack_forget()

            canvas.configure(scrollregion=canvas.bbox("all"))

        self.table_labels_frame.bind("<Configure>", configure_scrollbar)
        scrollbar_frame.bind("<Configure>", configure_scrollbar)

    def _add_delete_table_section(self, sidebar: tk.Frame):
        """Add the delete table option to the sidebar."""
        self._add_separator(sidebar)

        delete_table_label = self._create_clickable_label(
            parent=sidebar,
            text="🗑 Delete Selected Table",
            command=self.delete_table
        )
        delete_table_label.pack(side='bottom', anchor='center', pady=10)
        self.add_custom_hover(delete_table_label)

    def _add_separator(self, parent: tk.Widget):
        """Add a horizontal separator to the parent widget."""
        separator = ttk.Separator(parent, orient='horizontal')
        separator.pack(fill='x')

    def _create_clickable_label(
            self,
            parent: tk.Widget,
            text: str,
            command,
            allow_rename: bool = False,
            anchor: str = 'w'
        ) -> tk.Label:
            """Create a clickable label with optional rename capability."""
            label = tk.Label(
                parent,
                text=text,
                bg=self.button_color,
                fg=self.text_color,
                cursor="hand2" if not allow_rename else "arrow",
                anchor=anchor,
            )
            label.bind("<Button-1>", lambda _: command())
            if allow_rename:
                label.bind("<Double-1>", lambda _: self.begin_rename(text))
            return label

    def create_main_frame(self):
        """Create the main frame for displaying tables."""
        self.main_frame = tk.Frame(self.root)
        self.main_frame.pack(expand=True, fill='both', side='right')

    def create_header_frame(self):
        """Create the header with filter and a settings button using the same design as sidebar buttons."""
        header_frame = tk.Frame(self.main_frame, height=self.header_height, bg=self.background_color)
        header_frame.pack(fill='x')
        header_frame.pack_propagate(False)
    
        tk.Label(header_frame, text="Filter:", bg=self.background_color, fg=self.text_color).pack(side='left')
    
        self.filter_entry = tk.Entry(header_frame, fg=self.text_color)
        self.filter_entry.pack(side='left')
        self.filter_entry.bind("<KeyRelease>", lambda _: self.apply_filter())
    
        settings_label = tk.Label(
            header_frame,
            text="...",
            bg=self.background_color,
            fg=self.text_color,
            cursor="hand2",
            anchor='w'
        )
        settings_label.place(relx=1.0, rely=0.0, anchor='ne', x=-40, y=20)
    
        settings_menu = tk.Menu(settings_label, tearoff=0)
        settings_menu.add_command(label="Export Table", command=self.export_table)
        settings_menu.add_command(label="Import Table", command=self.import_file)
        settings_menu.add_command(label="Rename Headers", command=self.rename_headers)
    
        def show_settings_menu(event):
            settings_menu.post(event.x_root, event.y_root)
    
        settings_label.bind("<Button-1>", show_settings_menu)
    
        def on_enter_settings(_):
            settings_label.config(bg=self.button_color_selected)
    
        def on_leave_settings(_):
            settings_label.config(bg=self.background_color)
    
        settings_label.bind("<Enter>", on_enter_settings)
        settings_label.bind("<Leave>", on_leave_settings)

    def create_table_frame(self):
        """Create the frame to hold the active table."""
        self.table_frame = tk.Frame(self.main_frame, bg=self.background_color)
        self.table_frame.pack(expand=True, fill='both')

    def initialize_data(self):
        """Initialize data structures and directories."""
        self.save_file_path = Path(__file__).parent / "Data.json"  # Changed to a single Data.json file

        self.tables: dict[str, Sheet] = {}
        self.original_data: dict[str, list[list[str]]] = {}
        self.headers: dict[str, list[str]] = {}
        self.current_table_name: str | None = None
        self.rename_entry: tk.Entry | None = None
        self.selected_table_label: tk.Label | None = None
        self.table_labels: dict[str, tk.Label] = {}  # Added initialization for table_labels

    def create_new_table(self):
        """Create a new table and select it with a unique name."""
        existing_numbers = [
            int(name.split(" ")[1]) for name in self.tables
            if name.startswith("Table ") and name.split(" ")[1].isdigit()
        ]
        next_number = max(existing_numbers, default=0) + 1
        table_name = f"Table {next_number}"
        self.add_table(table_name)
        self.load_selected_table(table_name)

    def import_file(self):
        """Import a table from a CSV or JSON file."""
        file_path = filedialog.askopenfilename(
            title="Import File",
            filetypes=[("JSON files", "*.json"), ("CSV files", "*.csv")]
        )
        if not file_path:
            return

        try:
            if file_path.endswith('.csv'):
                with open(file_path, newline='', encoding='utf-8') as csvfile:
                    data = list(csv.reader(csvfile))
            elif file_path.endswith('.json'):
                with open(file_path, 'r', encoding='utf-8') as jsonfile:
                    data = json.load(jsonfile)
            else:
                raise ValueError("Unsupported file format.")

            headers, table_data = data[0], data[1:]
            self.add_table_from_data(file_path, headers, table_data)
        except Exception as e:
            messagebox.showerror("File Import Error", str(e))

    def add_table_from_data(self, file_path: str, headers: list[str], table_data: list[list[str]]):
        """Add a table using existing data from a file."""
        table_name = Path(file_path).stem
        table_name = self.ensure_unique_table_name(table_name)

        self.add_table(table_name, table_data)
        self.headers[table_name] = headers
        self.load_selected_table(table_name)
        self.save_data()

    def ensure_unique_table_name(self, table_name: str) -> str:
        """Ensure the table name is unique by appending suffixes if necessary."""
        original_name = table_name
        counter = 1
        while table_name in self.tables:
            table_name = f"{original_name} (New {counter})"
            counter += 1
        return table_name

    def save_table_data(self, file_path: str, data: list[list[str]], format: str):
        """Save table data in the specified format (CSV or JSON)."""
        match format:
            case 'csv':
                with open(file_path, 'w', newline='', encoding='utf-8') as file:
                    csv.writer(file).writerows(data)
            case 'json':
                with open(file_path, 'w', encoding='utf-8') as file:
                    json.dump(data, file, indent=4)
            case _:
                raise ValueError("Unsupported file format.")
            
    def export_table(self):
        """Export the current table to a CSV or JSON file."""
        if not self.current_table_name:
            messagebox.showwarning("No Table Selected", "Please select a table to export.")
            return

        file_path = filedialog.asksaveasfilename(
            title="Export File",
            defaultextension=".json",
            filetypes=[("JSON files", "*.json"), ("CSV files", "*.csv")],
            initialfile=self.current_table_name
        )
        if not file_path:
            return

        try:
            data = [self.headers[self.current_table_name]] + self.tables[self.current_table_name].get_sheet_data()
            if file_path.endswith('.csv'):
                self.save_table_data(file_path, data, 'csv')
            elif file_path.endswith('.json'):
                with open(file_path, 'w', encoding='utf-8') as file:
                    json.dump(data, file, indent=4)
            else:
                raise ValueError("Unsupported file format.")

            self.save_data()
            messagebox.showinfo("Export Successful", f"Table '{self.current_table_name}' has been exported successfully.")
        except Exception as e:
            messagebox.showerror("Export Failed", f"An error occurred during export: {e}")

    def add_table(self, table_name: str, data: list[list[str]] | None = None):
        """Add a new table to the application."""
        default_data = [["" for _ in range(5)] for _ in range(10)]
        sheet = Sheet(
            self.table_frame,
            data=data or default_data,
            show_table=True,
            headers=None,
            font=self.default_font,
            header_font=self.default_font,
            auto_resize_columns=True
        )
        sheet.set_options(table_fg=self.text_color, header_fg=self.text_color)
        sheet.enable_bindings()
        sheet.extra_bindings([("end_edit_cell", lambda _: self.save_data())])
        sheet.pack_forget()

        self.tables[table_name] = sheet
        self.original_data[table_name] = sheet.get_sheet_data()
        self.headers.setdefault(table_name, sheet.headers())

        self.create_table_label(table_name)
        self.save_data()  # Save after adding a table

    def create_table_label(self, table_name: str):
        """Create a label for the table in the sidebar."""
        label = self._create_clickable_label(
            parent=self.table_labels_frame,
            text=table_name,
            command=lambda: self.load_selected_table(table_name),
            allow_rename=True
        )
        label.pack(fill='x', padx=20, pady=5)
        self.table_labels[table_name] = label
        self.add_custom_hover(label)

    def delete_table(self):
        """Delete the currently selected table."""
        if not self.current_table_name:
            messagebox.showwarning("No Table Selected", "Please select a table to delete.")
            return

        if messagebox.askyesno("Delete Table", f"Are you sure you want to delete the table '{self.current_table_name}'?"):
            self.remove_table(self.current_table_name)

    def remove_table(self, table_name: str):
        """Remove a table from the application."""
        self.tables[table_name].destroy()
        self.table_labels[table_name].destroy()
        del self.tables[table_name]
        del self.original_data[table_name]
        del self.headers[table_name]
        del self.table_labels[table_name]
        
        self.current_table_name = None
        self.selected_table_label = None
        self.save_data()  # Save after removing a table

    def load_tables(self):
        """Load existing tables from the Data.json file."""
        if not self.save_file_path.exists():
            return  # No data to load
        
        with self.save_file_path.open('r', encoding='utf-8') as file:
            all_data = json.load(file)
        
        for table_name, data in all_data.items():
            headers, table_data = data[0], data[1:]
            self.add_table(table_name, table_data)
            self.headers[table_name] = headers

    def load_selected_table(self, table_name: str):
        """Display the selected table and hide others."""
        for name, sheet in self.tables.items():
            if name == table_name:
                sheet.pack(expand=True, fill='both')
                self.current_table_name = name
                sheet.headers(self.headers[name])
                self.apply_filter()
                self.selected_table_label = self.table_labels[name]
                self.selected_table_label.config(bg=self.button_color_selected)
            else:
                sheet.pack_forget()
                self.table_labels[name].config(bg=self.button_color)

    def save_data(self):
        """Save all tables to the Data.json file."""
        all_data = {}
        for table_name in self.tables:
            data = [self.headers[table_name]] + self.tables[table_name].get_sheet_data()
            all_data[table_name] = data
        
        with self.save_file_path.open('w', encoding='utf-8') as file:
            json.dump(all_data, file, indent=4)
        print("All table data saved successfully.")

    def apply_filter(self):
        """Filter table data based on the filter entry."""
        if not self.current_table_name:
            return

        term = self.filter_entry.get().lower()
        original_data = self.original_data[self.current_table_name]
        filtered_data = [
            row for row in original_data
            if any(term in str(cell).lower() for cell in row)
        ]
        self.tables[self.current_table_name].set_sheet_data(filtered_data)

    def rename_headers(self):
        """Rename the headers of the selected table."""
        if not self.current_table_name:
            messagebox.showwarning("No Table Selected", "Please select a table to rename headers.")
            return

        current_headers = self.headers[self.current_table_name]
        new_headers = simpledialog.askstring(
            "Rename Headers",
            "Enter new headers (comma-separated):",
            initialvalue=", ".join(current_headers)
        )
        if new_headers:
            header_list = [header.strip() for header in new_headers.split(',')]
            self.headers[self.current_table_name] = header_list
            self.tables[self.current_table_name].headers(header_list)
            self.save_data()

    def begin_rename(self, table_name: str):
        """Start renaming a table by replacing its label with an entry."""
        if table_name not in self.table_labels:
            messagebox.showerror("Error", f"Table '{table_name}' not found.")
            return

        label = self.table_labels[table_name]
        self.cancel_rename()

        self.rename_entry = tk.Entry(
            self.table_labels_frame,
            bg=label.cget("bg"),
            fg=self.text_color,
            relief='flat'
        )
        self.rename_entry.insert(0, table_name)
        self.rename_entry.place(
            x=label.winfo_x(),
            y=label.winfo_y(),
            width=label.winfo_width(),
            height=label.winfo_height()
        )
        self.rename_entry.focus()
        self.rename_entry.select_range(0, tk.END)
        self.rename_entry.bind('<Return>', lambda _: self.end_rename(table_name))
        self.rename_entry.bind('<FocusOut>', lambda _: self.cancel_rename())

    def end_rename(self, old_name: str):
        """Finalize the renaming of a table."""
        new_name = self.rename_entry.get().strip()

        if not new_name:
            messagebox.showerror("Invalid Name", "Table name cannot be empty.")
            self.rename_entry.focus_set()
            return

        if new_name in self.tables and new_name != old_name:
            messagebox.showerror("Duplicate Name", f"A table named '{new_name}' already exists.")
            self.rename_entry.focus_set()
            return

        if new_name != old_name:
            self.update_table_name(old_name, new_name)
            self.load_selected_table(new_name)

        self.cancel_rename()

    def update_table_name(self, old_name: str, new_name: str):
        """Update the table's name and associated resources."""
        self.tables[new_name] = self.tables.pop(old_name)
        self.original_data[new_name] = self.original_data.pop(old_name)
        self.headers[new_name] = self.headers.pop(old_name)

        label = self.table_labels.pop(old_name)
        label.config(text=new_name)
        label.bind("<Button-1>", lambda _: self.load_selected_table(new_name))
        label.bind("<Double-1>", lambda _: self.begin_rename(new_name))

        self.table_labels[new_name] = label

        if self.selected_table_label == label:
            label.config(bg=self.button_color_selected)

        self.save_data()  # Save after renaming a table

    def cancel_rename(self):
        """Cancel the ongoing rename operation."""
        if self.rename_entry:
            self.rename_entry.destroy()
            self.rename_entry = None

    def add_custom_hover(self, label: tk.Label):
        """Add hover effects to a label."""
        def on_enter(_: tk.Event):
            if label != self.selected_table_label:
                label.config(bg=self.button_color_selected)

        def on_leave(_: tk.Event):
            if label != self.selected_table_label:
                label.config(bg=self.button_color)

        label.bind("<Enter>", on_enter)
        label.bind("<Leave>", on_leave)

    #--- Custom Designs --- 
        
    def config_scrollbar_style(self):
        """Configure the custom scrollbar style."""
        self.style = ttk.Style()
        self.style.theme_use("default")
        
        self.style.configure("Custom.Vertical.TScrollbar",
                             troughcolor=self.sidebar_color,
                             background="#c0c1c4",
                             borderwidth=0,        
                             arrowcolor=self.text_color)

        self.style.map("Custom.Vertical.TScrollbar",
                       background=[('active', '#878789')])
        
        self.style.layout("Custom.Vertical.TScrollbar",
                          [
                              ('Vertical.Scrollbar.trough',
                               {'children': [('Vertical.Scrollbar.thumb',
                                              {'expand': '1', 'sticky': 'ns'})],
                                'sticky': 'ns'})
                          ])

#--- Main ---

if __name__ == "__main__":
    set_dpi_awareness()
    root = tk.Tk()
    app = TableApp(root)
    root.mainloop()