# Module header
import sys

if __name__ == "__main__":
    sys.exit("This module is not intended to be executed as the main program.")

# Imports
import tkinter as tk
from tkinter import ttk
from src.core.image_handler import load_icon

# Functions
def main() -> None:
    root = tk.Tk()
    root.title("Ukázka rozložení")
    root.geometry("800x600")

    # ==== MENU ====
    menu_bar = tk.Menu(root)
    root.config(menu=menu_bar)

    file_menu = tk.Menu(menu_bar, tearoff=0)
    file_menu.add_command(label="Otevřít")
    file_menu.add_command(label="Ukončit", command=root.quit)
    menu_bar.add_cascade(label="Soubor", menu=file_menu)

    # ==== HLAVNÍ RÁM ====
    main_frame = tk.Frame(root)
    main_frame.pack(fill="both", expand=True)

    main_frame.columnconfigure(0, weight=1)
    main_frame.columnconfigure(1, weight=2)
    main_frame.rowconfigure(0, weight=1)

    # ==== Ikony ====
    unchecked = load_icon("src/resources/images/32/32_unchecked.png")
    checked = load_icon("src/resources/images/32/32_checked.png")
    icons = {"unchecked": unchecked, "checked": checked}

    # ==== VLEVO: STROM ====
    tree = ttk.Treeview(main_frame)
    tree.grid(row=0, column=0, sticky="nsew", padx=2, pady=2)

    # Slovník pro stavy checkboxů
    states = {}

    # Funkce pro přepnutí checkboxu
    def toggle(event) -> None:
        region = tree.identify("region", event.x, event.y)
        if region == "tree":
            item_id = tree.identify_row(event.y)
            if item_id:
                states[item_id] = not states[item_id]
                tree.item(item_id, image=icons["checked"] if states[item_id] else icons["unchecked"])

    tree.bind("<Button-1>", toggle)

    # Přidání uzlů se stavem
    root_node = tree.insert("", "end", text="Root", image=icons["unchecked"])
    states[root_node] = False

    child1 = tree.insert(root_node, "end", text="Child 1", image=icons["unchecked"])
    states[child1] = False
    child2 = tree.insert(root_node, "end", text="Child 2", image=icons["unchecked"])
    states[child2] = False

    tree.item(root_node, open=True)

    # ==== VPRAVO: SEZNAM ====
    listbox = tk.Listbox(main_frame)
    listbox.grid(row=0, column=1, sticky="nsew", padx=2, pady=2)

    for i in range(1, 21):
        listbox.insert("end", f"Položka {i}")

    # ==== STAVOVÝ ŘÁDEK ====
    status_bar = tk.Label(root, text="Připraven", anchor="w", relief="sunken")
    status_bar.pack(side="bottom", fill="x")

    # ==== KONTEXTOVÁ MENU ====
    tree_menu = tk.Menu(root, tearoff=0)
    tree_menu.add_command(
        label="Akce na stromu",
        command=lambda: status_bar.config(text="Klikl jsi na strom")
    )

    list_menu = tk.Menu(root, tearoff=0)
    list_menu.add_command(
        label="Akce na seznamu",
        command=lambda: status_bar.config(text="Klikl jsi na seznam")
    )

    # ==== HANDLERY ====
    def tree_right_click(event):
        item_id = tree.identify_row(event.y)
        if item_id:  # klik na uzel
            tree.selection_set(item_id)
            tree_menu.tk_popup(event.x_root, event.y_root)

    def list_right_click(event):
        index = listbox.nearest(event.y)
        if index >= 0:  # klik na položku
            listbox.selection_clear(0, "end")
            listbox.selection_set(index)
            list_menu.tk_popup(event.x_root, event.y_root)

    tree.bind("<Button-3>", tree_right_click)
    listbox.bind("<Button-3>", list_right_click)

    root.mainloop()