import sys
import os
import threading
import tkinter as tk
from .core.app_controller import AppController
from .gui.main_window import MainWindow

def main():
    """
    Main entry point for the PyMsc application.
    Initializes the Core Logic and the GUI.
    """
    # Initialize the root Tkinter window
    root = tk.Tk()
    root.title("PyMsc - Python Mission Computer")
    root.geometry("1200x800")

    # Initialize the Application Controller (Core Logic)
    # Pass root to controller if needed for event loop management, 
    # or keep them separate via callbacks.
    app_core = AppController()

    # Initialize the GUI, passing the controller to allow two-way communication
    gui = MainWindow(root, app_core)

    # Handle graceful shutdown
    def on_closing():
        app_core.stop()
        root.destroy()
        sys.exit(0)

    root.protocol("WM_DELETE_WINDOW", on_closing)

    # Start the application logic
    app_core.start()

    # Start the GUI event loop
    print("PyMsc Started.")
    root.mainloop()

if __name__ == "__main__":
    main()