Analyze the following code. What is the best way to increase the readability and maintainability of it. I mean thinks like breaking it apart in classes? List several options with there pros and cons and order them from best to worst. Python 3.12 Code: import ctypes
import csv
import json
import re
import tkinter as tk
from pathlib import Path
from tkinter import filedialog, messagebox, simpledialog, ttk
from typing import Any, Optional, List, Dict

from tksheet import Sheet

# --- Helper Functions ---

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}")

def custom_filter_design(master: tk.Widget, style: ttk.Style, headers: List[str], 
                         filter_types: List[str], filter_font: tuple, 
                         filter_combobox_font: tuple, colors: Dict[str, str]) -> tuple:
    """Creates a custom filter frame."""
    filter_frame = ttk.Frame(master, style="Custom.TFrame")

    # Configure styles
    style.configure("Custom.TFrame", background=colors["background"], relief="flat", borderwidth=0)
    style.configure("TCombobox", relief="flat", borderwidth=0, background=colors["background"], fieldbackground=colors["background"])
    style.map("TCombobox", fieldbackground=[('readonly', colors["background"])], background=[('readonly', colors["background"])])
    style.configure("TEntry", relief="flat", borderwidth=0, background=colors["background"])
    style.configure("Line.TFrame", background=colors["filter_line"])

    # Create widgets
    header_combobox = ttk.Combobox(filter_frame, values=headers, width=15, font=filter_combobox_font, state="readonly")
    filtertype_combobox = ttk.Combobox(filter_frame, values=filter_types, width=15, font=filter_combobox_font, state="readonly")
    filter_entry = ttk.Entry(filter_frame, font=filter_font)
    underline = ttk.Frame(filter_frame, height=1, style="Line.TFrame")

    # Layout widgets
    header_combobox.grid(row=0, column=0, padx=(0, 30), pady=2, sticky='ew')
    filtertype_combobox.grid(row=0, column=1, padx=2, pady=2, sticky='ew')
    filter_entry.grid(row=1, column=0, columnspan=2, padx=2, pady=(2, 0), sticky='ew')
    underline.grid(row=2, column=0, columnspan=2, sticky='ew', pady=(0, 2))

    # Prevent text selection in comboboxes
    for combobox in (header_combobox, filtertype_combobox):
        combobox.bind("<FocusIn>", lambda event: event.widget.selection_clear())

    filter_frame.columnconfigure((0, 1), weight=1)
    underline.pack_propagate(False)

    return filter_frame, header_combobox, filtertype_combobox, filter_entry

def custom_scrollbar_design(style: ttk.Style, colors: Dict[str, str]):
    """Configure custom scrollbar style."""
    style.configure("Custom.Vertical.TScrollbar", troughcolor=colors["scrollbar_trough"], background=colors["scrollbar_background"], borderwidth=0, arrowcolor=colors["scrollbar_arrow"])
    style.map("Custom.Vertical.TScrollbar", background=[('active', colors["scrollbar_active"])])
    style.layout("Custom.Vertical.TScrollbar", [('Vertical.Scrollbar.trough', {'children': [('Vertical.Scrollbar.thumb', {'expand': '1', 'sticky': 'ns'})], 'sticky': 'ns'})])


# --- TableApp Class ---

class TableApp:
    """Table Editor with 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.style = ttk.Style()
        self.style.theme_use("default")
        self.setup_ui()
        self.load_tables()

    # --- Configuration Methods ---

    def config_dimensions(self):
        """Configure app dimensions."""
        self.root.title("Database")
        self.root.geometry("1920x1080")
        self.root.minsize(1435, 910)
        self.dimensions = {
            "sidebar_width": 400,
            "spacer_frame_width": 100,
            "header_height": 190,
            "separator_height": 1,
        }

    def config_fonts(self):
        """Configure app fonts."""
        self.fonts = {
            "text": ("Literata", 12),
            "tksheet": ("Literata", 12, "normal"),
            "header_info": ("Literata", 10),
            "filter": ("Literata", 12),
            "filter_combobox": ("Literata", 8),
        }

    def config_colors(self):
        """Configure app colors."""
        self.colors = {
            "text": "#333333",
            "background": "#FFFFFF",
            "sidebar": "#F7F8FC",
            "button": "#F7F8FC",
            "button_selected": "#EAEDEF",
            "separator": "#333333",
            "header_info": "#999999",
            "scrollbar_trough": "#F7F8FC",
            "scrollbar_background": "#c0c1c4",
            "scrollbar_arrow": "#333333",
            "scrollbar_active": "#878789",
            "filter_line": "#00bcf0",
        }

    # --- UI Setup Methods ---

    def setup_ui(self):
        """Set up the user interface."""
        self.root.grid_rowconfigure(0, weight=0)
        self.root.grid_rowconfigure(1, weight=1)
        self.root.grid_columnconfigure(0, weight=0)
        self.root.grid_columnconfigure(1, weight=0, minsize=self.dimensions["spacer_frame_width"])
        self.root.grid_columnconfigure(2, weight=3)

        self.create_sidebar()
        self.create_header_frame()
        self.create_spacer_frame()
        self.create_table_frame()

    def create_sidebar(self):
        """Create the sidebar."""
        sidebar = self._create_frame(self.root, self.dimensions["sidebar_width"], self.colors["sidebar"])
        sidebar.grid(row=0, column=0, rowspan=2, sticky='ns')
        sidebar.grid_propagate(False)
        sidebar.columnconfigure(0, weight=1)
        sidebar.rowconfigure(0, weight=1)

        functional_sidebar = self._create_frame(sidebar, self.dimensions["sidebar_width"], self.colors["sidebar"])
        functional_sidebar.grid(row=0, column=0, sticky='nsew')
        functional_sidebar.columnconfigure(0, weight=1)
        functional_sidebar.rowconfigure(0, weight=0)
        functional_sidebar.rowconfigure(1, weight=1)
        functional_sidebar.rowconfigure(2, weight=0)

        self._create_normal_buttons(functional_sidebar)
        self._create_scrollable_canvas(functional_sidebar)
        self._create_delete_table_section(functional_sidebar)

    def create_header_frame(self):
        """Create the header frame."""
        header_frame = self._create_frame(self.root, None, self.colors["background"])
        header_frame.grid(row=0, column=1, columnspan=2, sticky='ew')
        header_frame.config(height=self.dimensions["header_height"])
        header_frame.grid_propagate(False)
        header_frame.grid_rowconfigure(0, weight=0)
        header_frame.grid_rowconfigure(1, weight=0)
        header_frame.grid_columnconfigure(0, weight=0)
        header_frame.grid_columnconfigure(1, weight=0)
        header_frame.grid_columnconfigure(2, weight=0)
        header_frame.grid_columnconfigure(3, weight=0)
        header_frame.grid_columnconfigure(4, weight=1)

        self._create_upper_header(header_frame)
        self._create_lower_header(header_frame)

    def _create_upper_header(self, parent: tk.Frame):
        """Create the upper header."""
        upper_header = self._create_frame(parent, None, self.colors["background"])
        upper_header.grid(row=0, column=0, columnspan=5, sticky='ew', pady=(0, 10))
        upper_header.grid_columnconfigure(5, weight=1)
        self._create_data_label(upper_header)
        self._create_table_name_label(upper_header)
        self._create_settings_label(upper_header)

    def _create_lower_header(self, parent: tk.Frame):
        """Create the lower header."""
        lower_header = self._create_frame(parent, None, self.colors["background"])
        lower_header.grid(row=1, column=0, columnspan=5, sticky='ew')
        self._create_filter_controls(lower_header)

    def create_spacer_frame(self):
        """Create a spacer frame."""
        spacer = self._create_frame(self.root, self.dimensions["spacer_frame_width"], self.colors["background"])
        spacer.grid(row=1, column=1, sticky='nsew')
        spacer.grid_propagate(False)

    def create_table_frame(self):
        """Create the table frame."""
        self.table_frame = self._create_frame(self.root, None, self.colors["background"])
        self.table_frame.grid(row=1, column=2, sticky='nsew')
        self.table_frame.grid_rowconfigure(0, weight=1)
        self.table_frame.grid_columnconfigure(0, weight=1)

    def _create_frame(self, parent: tk.Widget, width: Optional[int], bg: str) -> tk.Frame:
        """Create a frame."""
        frame = tk.Frame(parent, width=width, bg=bg, bd=0, relief='flat')
        if width:
            frame.config(width=width)
        return frame

    # --- Sidebar Component Creation Methods ---

    def _create_normal_buttons(self, sidebar: tk.Frame):
        """Create normal buttons in the sidebar."""
        normal_buttons_frame = self._create_frame(sidebar, self.dimensions["sidebar_width"], self.colors["sidebar"])
        normal_buttons_frame.grid(row=0, column=0, sticky='ew', padx=10, pady=(10, 0))
        normal_buttons_frame.columnconfigure(0, weight=1)

        create_table_button = self._create_clickable_label(normal_buttons_frame, "Create New Table", self.create_new_table, anchor='center')
        create_table_button.grid(row=0, column=0, pady=10, sticky='ew')
        self.add_custom_hover(create_table_button)

        separator = tk.Frame(normal_buttons_frame, height=self.dimensions["separator_height"], bg=self.colors["separator"])
        separator.grid(row=1, column=0, sticky='ew', pady=5)

    def _create_scrollable_canvas(self, sidebar: tk.Frame):
        """Create scrollable canvas for table labels."""
        scrollable_container = self._create_frame(sidebar, self.dimensions["sidebar_width"], self.colors["sidebar"])
        scrollable_container.grid(row=1, column=0, sticky='nsew', padx=10, pady=10)
        scrollable_container.columnconfigure(0, weight=1)
        scrollable_container.rowconfigure(0, weight=1)

        self.canvas = tk.Canvas(scrollable_container, bg=self.colors["sidebar"], highlightthickness=0)
        self.canvas.grid(row=0, column=0, sticky='nsew')

        custom_scrollbar_design(self.style, self.colors)

        self.scrollbar = ttk.Scrollbar(scrollable_container, orient="vertical", command=self.canvas.yview, style="Custom.Vertical.TScrollbar")
        self.scrollbar.grid(row=0, column=1, sticky='ns')

        self.canvas.configure(yscrollcommand=self.scrollbar.set)

        self.table_labels_frame = tk.Frame(self.canvas, bg=self.colors["sidebar"])
        self.table_labels_window = self.canvas.create_window((0, 0), window=self.table_labels_frame, anchor="nw", width=self.dimensions["sidebar_width"])

        self.canvas.bind("<MouseWheel>", self._on_mouse_wheel)
        self.table_labels_frame.bind("<MouseWheel>", self._on_mouse_wheel)

        self.table_labels_frame.bind("<Configure>", lambda event: (self.canvas.configure(scrollregion=self.canvas.bbox("all")), self._update_scrollbar(scrollable_container, self.canvas, self.scrollbar)))
        scrollable_container.bind("<Configure>", lambda event: self._update_scrollbar(scrollable_container, self.canvas, self.scrollbar))
        self.canvas.bind('<Configure>', self._on_canvas_configure)

    def _on_canvas_configure(self, event):
        """Update the table_labels_frame width to match the canvas width."""
        self.canvas.itemconfig(self.table_labels_window, width=event.width)

    def _on_mouse_wheel(self, event):
        """Handle mouse wheel scrolling."""
        if self.scrollbar.winfo_viewable():
            self.canvas.yview_scroll(int(-1 * (event.delta / 120)), "units")

    def _update_scrollbar(self, scrollbar_frame, canvas, scrollbar):
        """Update scrollbar visibility."""
        canvas.update_idletasks()
        canvas_height = scrollbar_frame.winfo_height()
        content_height = self.table_labels_frame.winfo_reqheight()

        if content_height > canvas_height:
            scrollbar.grid()
            canvas.configure(yscrollcommand=scrollbar.set)
            canvas.bind("<MouseWheel>", lambda event: canvas.yview_scroll(int(-1 * (event.delta / 120)), "units"))
        else:
            scrollbar.grid_remove()
            canvas.configure(yscrollcommand=lambda *args: None)
            canvas.unbind("<MouseWheel>")

    def _create_delete_table_section(self, sidebar: tk.Frame):
        """Create delete table section in the sidebar."""
        delete_table_frame = self._create_frame(sidebar, self.dimensions["sidebar_width"], self.colors["sidebar"])
        delete_table_frame.grid(row=2, column=0, sticky='ew', padx=10, pady=(0, 10))
        delete_table_frame.columnconfigure(0, weight=1)
        delete_table_frame.rowconfigure(1, weight=1)

        separator = tk.Frame(delete_table_frame, height=self.dimensions["separator_height"], bg=self.colors["separator"])
        separator.grid(row=0, column=0, sticky='ew', pady=5)

        delete_table_button = self._create_clickable_label(delete_table_frame, "🗑 Delete Selected Table", self.delete_table, anchor='center')
        delete_table_button.grid(row=1, column=0, pady=10, sticky='ew')
        self.add_custom_hover(delete_table_button)

    # --- Header Component Creation Methods ---

    def _create_data_label(self, parent: tk.Frame):
        """Create and grid the 'Data >' label."""
        data_label = tk.Label(parent, text="Data > ", bg=self.colors["background"], fg=self.colors["header_info"], font=self.fonts["header_info"])
        data_label.grid(row=0, column=0, padx=22, pady=(22, 0), sticky='nw')

    def _create_table_name_label(self, parent: tk.Frame):
        """Create and grid the table name label."""
        self.table_name_label = tk.Label(parent, text=self.current_table_name if self.current_table_name else "No Table Selected", bg=self.colors["background"], fg=self.colors["text"], font=self.fonts["header_info"])
        self.table_name_label.grid(row=0, column=1, padx=(88, 10), pady=(22, 0), sticky='nw')

    def _create_settings_label(self, parent: tk.Frame):
        """Create and grid the settings label with its associated menu."""
        settings_label = tk.Label(parent, text="...", bg=self.colors["background"], fg=self.colors["text"], cursor="hand2", anchor='e', font=self.fonts["text"])
        settings_label.grid(row=0, column=4, padx=40, pady=20, sticky='e')

        settings_menu = self._create_settings_menu()
        self._bind_settings_label_events(settings_label, settings_menu)

    def _create_settings_menu(self) -> tk.Menu:
        """Create the settings dropdown menu."""
        menu = tk.Menu(self.root, tearoff=0)
        menu.add_command(label="Export Table", command=self.export_table)
        menu.add_command(label="Import Table", command=self.import_file)
        menu.add_command(label="Rename Headers", command=self.rename_headers)
        return menu

    def _bind_settings_label_events(self, label: tk.Label, menu: tk.Menu):
        """Bind events to the settings label."""
        label.bind("<Button-1>", lambda e: menu.post(e.x_root, e.y_root))
        label.bind("<Enter>", lambda _: label.config(bg=self.colors["button_selected"]))
        label.bind("<Leave>", lambda _: label.config(bg=self.colors["background"]))

    def _create_filter_controls(self, parent: tk.Frame):
        """Create and add filter controls."""
        filter_frame, self.filter_header_dropdown, self.filter_option_dropdown, self.filter_text_entry = custom_filter_design(
            parent, self.style, headers=["All"] + self.headers.get(self.current_table_name, []),
            filter_types=[
                "is", "is not", "contains", "does not contain",
                "starts with", "ends with", "is empty", "is not empty"
            ],
            filter_font=self.fonts["filter"], filter_combobox_font=self.fonts["filter_combobox"], colors=self.colors
        )
        filter_frame.grid(row=0, column=0, columnspan=5, padx=100, pady=0, sticky='ew')

        self.filter_header_var = tk.StringVar(value="All")
        self.filter_option_var = tk.StringVar(value="contains")
        self.filter_text_var = tk.StringVar()

        self.filter_header_dropdown['textvariable'] = self.filter_header_var
        self.filter_option_dropdown['textvariable'] = self.filter_option_var
        self.filter_text_entry['textvariable'] = self.filter_text_var

        self.filter_header_dropdown.bind("<<ComboboxSelected>>", self.apply_filter)
        self.filter_option_dropdown.bind("<<ComboboxSelected>>", lambda event: [self.update_filter_text_state(event), self.apply_filter()])
        self.filter_text_entry.bind("<KeyRelease>", self.apply_filter)
        self.filter_text_entry.bind("<Return>", self.apply_filter)

    def update_filter_text_state(self, event=None):
        """Enable or disable the filter text entry."""
        option = self.filter_option_var.get()
        if option in ["is empty", "is not empty"]:
            self.filter_text_var.set("")
            self.filter_text_entry.config(state='disabled')
            self.apply_filter()
        else:
            self.filter_text_entry.config(state='normal')

    # --- Data Management Methods ---

    def initialize_data(self):
        """Initialize data structures."""
        self.save_file_path = Path(__file__).parent / "Data.json"
        self.tables_data: Dict[str, Dict[str, Any]] = {}
        self.current_sheet: Optional[Sheet] = None
        self.headers: Dict[str, List[str]] = {}
        self.current_table_name: Optional[str] = None
        self.rename_entry: Optional[tk.Entry] = None
        self.selected_table_label: Optional[tk.Label] = None
        self.table_labels: Dict[str, tk.Label] = {}
        self.displayed_row_indices: List[int] = []


    def sort_table_labels(self):
        """Sort table labels."""
        def sort_key(name):
            m = re.match(r'^(\d+)', name)
            if m:
                return (1, int(m.group(1)))
            m = re.match(r'^([A-Za-z]+)(\d+)', name)
            if m:
                return (3, m.group(1).lower(), int(m.group(2)))
            m = re.match(r'^([A-Za-z]+)', name)
            if m:
                return (2, m.group(1).lower())
            return (4, name.lower())

        sorted_tables = sorted(self.tables_data.keys(), key=sort_key)
        for table_name in sorted_tables:
            label = self.table_labels.get(table_name)
            if label:
                label.pack_forget()
                label.pack(fill='x', padx=0, pady=5, expand=True)

    def create_new_table(self):
        """Create a new table."""
        existing_numbers = [int(name.split(" ")[1]) for name in self.tables_data 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 table from file."""
        file_path = filedialog.askopenfilename(title="Import File", filetypes=[("All Supported Files", "*.json *.csv"), ("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.")
            if not data or not isinstance(data, list) or not all(isinstance(row, list) for row in data):
                raise ValueError("Invalid data format in the file.")
            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 from file data."""
        table_name = Path(file_path).stem
        table_name = self.ensure_unique_table_name(table_name)
        self.add_table(table_name, data=table_data, headers=headers)
        self.load_selected_table(table_name)
        self.save_data()

    def ensure_unique_table_name(self, table_name: str) -> str:
        """Ensure table name is unique."""
        original_name = table_name
        counter = 1
        while table_name in self.tables_data:
            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."""
        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 current table."""
        if not self.current_table_name or self.current_table_name not in self.tables_data:
            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_data[self.current_table_name]["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: Optional[List[List[str]]] = None, headers: Optional[List[str]] = None):
        """Add a new table."""
        if headers:
            self.headers[table_name] = headers
        else:
            default_headers = ["Column 1", "Column 2", "Column 3", "Column 4", "Column 5"]
            self.headers[table_name] = default_headers
        self.tables_data[table_name] = {"headers": self.headers[table_name], "data": data or [["" for _ in range(len(self.headers[table_name]))] for _ in range(10)]}
        self.create_table_label(table_name)
        self.save_data()

    def create_table_label(self, table_name: str):
        """Create label for table."""
        label = self._create_clickable_label(self.table_labels_frame, table_name, lambda: self.load_selected_table(table_name), True)
        label.pack(fill='x', padx=0, pady=5, expand=True)
        self.table_labels[table_name] = label
        self.add_custom_hover(label)
        self.sort_table_labels()

    def delete_table(self):
        """Delete selected table."""
        if not self.current_table_name or self.current_table_name not in self.tables_data:
            messagebox.showwarning("No Table Selected", "Please select a valid 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 on_columns_deleted(self, event):
        """Handle column deletion."""
        if not self.current_table_name or not self.current_sheet:
            return
        new_headers = self.current_sheet.headers()
        self.headers[self.current_table_name] = new_headers
        self.filter_header_dropdown['values'] = ["All"] + new_headers
        self.filter_header_var.set("All")
        self.filter_option_var.set("contains")
        self.filter_text_var.set("")
        self.filter_text_entry.config(state='normal')
        self.apply_filter()

    def remove_table(self, table_name: str):
        """Remove a table."""
        if self.current_table_name == table_name and self.current_sheet:
            self.current_sheet.destroy()
            self.current_sheet = None
        label = self.table_labels.get(table_name)
        if label:
            label.destroy()
        if table_name in self.tables_data:
            del self.tables_data[table_name]
        if table_name in self.headers:
            del self.headers[table_name]
        if table_name in self.table_labels:
            del self.table_labels[table_name]
        self.current_table_name = None
        self.selected_table_label = None
        self.save_data()
        self.sort_table_labels()

    def load_tables(self):
        """Load tables from file."""
        if not self.save_file_path.exists():
            return
        try:
            with self.save_file_path.open('r', encoding='utf-8') as file:
                all_data = json.load(file)
        except Exception as e:
            messagebox.showerror("Load Error", f"Failed to load tables: {e}")
            return
        for table_name, data in all_data.items():
            if not isinstance(data, list) or not data:
                continue
            headers, table_data = data[0], data[1:]
            self.headers[table_name] = headers
            self.tables_data[table_name] = {"headers": headers, "data": table_data}
            self.create_table_label(table_name)
        self.sort_table_labels()

    def load_selected_table(self, table_name: str):
        """Display selected table."""
        if self.current_sheet:
            self.current_sheet.pack_forget()
            self.current_sheet.destroy()
            self.current_sheet = None
        if self.selected_table_label:
            try:
                self.selected_table_label.config(bg=self.colors["button"])
            except tk.TclError:
                self.selected_table_label = None

        if table_name not in self.tables_data:
            messagebox.showerror("Error", f"Table '{table_name}' does not exist.")
            self.current_table_name = None
            self.selected_table_label = None
            return

        table_info = self.tables_data[table_name]
        headers = table_info["headers"]
        data = table_info["data"]
        try:
            sheet = Sheet(
                self.table_frame,
                data=data,
                show_table=True,
                headers=headers,
                font=self.fonts["tksheet"],
                header_font=self.fonts["tksheet"],
                auto_resize_columns=True
            )
            sheet.set_options(table_fg=self.colors["text"], header_fg=self.colors["text"])
            sheet.enable_bindings()
            sheet.extra_bindings([
                ("end_edit_cell", self.on_cell_edit),
                ("end_delete_columns", self.on_columns_deleted)
            ])
            sheet.pack(expand=True, fill='both')
            self.current_sheet = sheet
            self.current_table_name = table_name

            if self.table_name_label:
                self.table_name_label.config(text=self.current_table_name)
            else:
                self.table_name_label = tk.Label(
                    self.root,
                    text=self.current_table_name,
                    bg=self.colors["background"],
                    fg=self.colors["text"],
                    font=self.fonts["header_info"]
                )
                self.table_name_label.grid(row=0, column=1, padx=(60, 10), pady=(5, 0), sticky='nw')

            label = self.table_labels.get(table_name)
            if label:
                self.selected_table_label = label
                try:
                    self.selected_table_label.config(bg=self.colors["button_selected"])
                except tk.TclError:
                    self.selected_table_label = None
                    messagebox.showerror("Error", f"Failed to update the label for '{table_name}'.")
            else:
                self.selected_table_label = None
                messagebox.showerror("Error", f"Label for '{table_name}' not found.")

            self.filter_header_var.set("All")
            self.filter_header_dropdown['values'] = ["All"] + headers

            self.filter_option_var.set("contains")
            self.update_filter_text_state()

            self.apply_filter()
        except Exception as e:
            messagebox.showerror("Sheet Error", f"Failed to load table '{table_name}': {e}")
            self.current_table_name = None
            self.selected_table_label = None

    def on_cell_edit(self, event=None):
        """Handle cell edits."""
        if self.current_table_name and self.current_sheet:
            sheet_data = self.current_sheet.get_sheet_data()
            for idx, row in enumerate(sheet_data):
                if idx < len(self.displayed_row_indices):
                    data_idx = self.displayed_row_indices[idx]
                    self.tables_data[self.current_table_name]["data"][data_idx] = row
                else:
                    self.tables_data[self.current_table_name]["data"].append(row)
            self.save_data()

    def save_data(self):
        """Save all tables data."""
        all_data = {}
        for table_name, table_info in self.tables_data.items():
            all_data[table_name] = [table_info["headers"]] + table_info["data"]
        try:
            with self.save_file_path.open('w', encoding='utf-8') as file:
                json.dump(all_data, file, indent=4)
        except Exception as e:
            print(f"Error saving data: {e}")

    def apply_filter(self, event=None):
        """Apply filter to table data."""
        if not self.current_table_name or not self.current_sheet:
            return
        header = self.filter_header_var.get()
        option = self.filter_option_var.get()
        text = self.filter_text_var.get().lower()
        original_data = self.tables_data[self.current_table_name]["data"]

        def row_matches(row):
            if header == "All":
                cells = row
                target_indices = range(len(cells))
            else:
                try:
                    target_indices = [self.headers[self.current_table_name].index(header)]
                except ValueError:
                    return False

            conditions = {
                "is": lambda cell, text: cell == text,
                "is not": lambda cell, text: cell != text,
                "contains": lambda cell, text: text in cell,
                "does not contain": lambda cell, text: text not in cell,
                "starts with": lambda cell, text: cell.startswith(text),
                "ends with": lambda cell, text: cell.endswith(text),
                "is empty": lambda cell, _: cell == "",
                "is not empty": lambda cell, _: cell != ""
            }

            for idx in target_indices:
                cell = str(row[idx]).lower()
                if conditions.get(option, lambda _, __: False)(cell, text):
                    return True
            return False

        filtered_data = []
        self.displayed_row_indices = []
        for i, row in enumerate(original_data):
            if row_matches(row):
                filtered_data.append(row)
                self.displayed_row_indices.append(i)

        try:
            self.current_sheet.set_sheet_data(filtered_data)
        except tk.TclError as e:
            print(f"Error applying filter: {e}")

    def rename_headers(self):
        """Rename table headers."""
        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(',')]
            if not header_list:
                messagebox.showerror("Invalid Headers", "Header list cannot be empty.")
                return
            self.headers[self.current_table_name] = header_list
            self.tables_data[self.current_table_name]["headers"] = header_list
            if self.current_sheet:
                try:
                    self.current_sheet.headers(header_list)
                except tk.TclError as e:
                    messagebox.showerror("Error", f"Failed to rename headers: {e}")

            self.filter_header_var.set("All")
            self.filter_header_dropdown['values'] = ["All"] + header_list
            self.apply_filter()

            self.save_data()

    # --- Table Label Rename Methods ---

    def begin_rename(self, table_name: str):
        """Start renaming a table."""
        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.colors["text"], 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 event: self.end_rename(table_name))
        self.rename_entry.bind('<FocusOut>', lambda event: self.cancel_rename())

    def end_rename(self, old_name: str):
        """Finalize table renaming."""
        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_data 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 table name in data structures."""
        self.tables_data[new_name] = self.tables_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 event: self.load_selected_table(new_name))
        label.bind("<Double-1>", lambda event: self.begin_rename(new_name))
        self.table_labels[new_name] = label
        if self.selected_table_label == label:
            try:
                label.config(bg=self.colors["button_selected"])
            except tk.TclError:
                pass
        self.save_data()
        self.sort_table_labels()

    def cancel_rename(self):
        """Cancel table renaming."""
        if self.rename_entry:
            self.rename_entry.destroy()
            self.rename_entry = None

    # --- Helper Methods ---

    def _create_clickable_label(self, parent: tk.Widget, text: str, command, allow_rename: bool = False, anchor: str = 'w') -> tk.Label:
        """Create a clickable label."""
        cursor = "arrow" if allow_rename else "hand2"
        label = tk.Label(parent, text=text, bg=self.colors["button"], fg=self.colors["text"], cursor=cursor, anchor=anchor, font=self.fonts["text"])
        label.bind("<Button-1>", lambda _: command())
        if allow_rename:
            label.bind("<Double-Button-1>", lambda _: self.begin_rename(text))
        label.bind("<MouseWheel>", self._on_mouse_wheel)
        return label

    def add_custom_hover(self, widget: tk.Widget):
        """Add hover effects to a widget."""
        widget.bind("<Enter>", lambda e: widget.config(bg=self.colors["button_selected"]))
        widget.bind("<Leave>", lambda e: widget.config(bg=self.colors["button"]))


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