"""
DuDONG Application Entry Point

Main entry point for the DuDONG Grading System application.
Initializes the Qt application and displays the main window.
"""

import sys
from PyQt5.QtWidgets import QApplication
from PyQt5.QtGui import QIcon
from pathlib import Path

from ui.main_window import DuDONGMainWindow


def main():
    """
    Main application entry point.
    
    Initializes QApplication, creates and shows the main window,
    and starts the event loop.
    """
    # Create Qt application
    app = QApplication(sys.argv)
    
    # Set application metadata
    app.setApplicationName("DuDONG")
    app.setOrganizationName("AIDurian")
    app.setOrganizationDomain("aidurian.org")
    
    # Set application icon (if exists)
    icon_path = Path(__file__).parent / "assets" / "logos" / "durian.png"
    if icon_path.exists():
        app.setWindowIcon(QIcon(str(icon_path)))
    
    # Set application-wide style
    app.setStyleSheet("""
        QApplication {
            font-family: Arial, sans-serif;
        }
    """)
    
    # Create and show main window
    print("=" * 80)
    print("DuDONG Grading System")
    print("=" * 80)
    print("Initializing application...")
    
    window = DuDONGMainWindow()
    window.show()
    
    print("Application started successfully!")
    print("=" * 80)
    
    # Start event loop
    sys.exit(app.exec_())


if __name__ == "__main__":
    main()