import tkinter as tk
from controller.MainController import MainController


class MainWindow(tk.Tk):
    """
        View - MainWindow

    dec...

    @author     Jérémi Nihart / EndMove
    @link       https://git.endmove.eu/EndMove/WebPicDownloader
    @version    1.0.0
    @since      2022-08-30
    """
    # Variables
    __controller: MainController = None
    __views: dict = None
    __frame_id: int = None

    # Constructor
    def __init__(self, controller: MainController):
        super().__init__()

        # Init view repository
        self.__views = {}

        # Save and setup main controller
        self.__controller = controller
        controller.set_view(self)

        # Init view components
        self.__init_window()
        self.__init_top_menu()

    # START Internal methods
    def __init_window(self):
        """
            [internal function]
        => Initialize window parameters
        """
        self.title('Tkinter app')
        # self.geometry('450x250')
        self.resizable(False, False)
        self.config(bg='#f7ef38')
    
    def __init_top_menu(self):
        """
            [internal function]
        => Initialize top menu of the window.
        """
        main_menu = tk.Menu(self)

        col1_menu = tk.Menu(main_menu, tearoff=0)
        col1_menu.add_command(label="Open folder", command=self.alert)
        col1_menu.add_separator()
        col1_menu.add_command(label="Quit", command=self.alert)
        main_menu.add_cascade(label="File", menu=col1_menu)

        col2_menu = tk.Menu(main_menu, tearoff=0)
        col2_menu.add_command(label="Check for update", command=self.__controller.on_check_for_update)
        col2_menu.add_command(label="About", command=self.alert)
        main_menu.add_cascade(label="Help", menu=col2_menu)

        self.config(menu=main_menu)

    def alert(self):
        # TODO remove
        print("You clicked")
    # END Internal methods

    # START App methods
    def add_view(self, frame, view):
        """
            [function for app]
        
        :frame: -> the frame id of the view to add.
        """
        self.__views[frame] = view
    # END App methods

    # START Controller methods
    def show_frame(self, frame):
        """
            [function for app & controller]
        => Allows to display the selected frame provided that it
        has been previously added to the frame dictionary.
        
        :frame: -> the frame if of the view to display.
        """
        if self.__views.get(frame):
            if self.__frame_id:
                self.__views.get(self.__frame_id).pack_forget()
            self.__views.get(frame).pack(fill=tk.BOTH, expand=False)
            self.__frame_id = frame
        else:
            raise ValueError("Unable to find the requested Frame")
    # END Controller methods