"""
Tesla Coil Spark Physics Course - Main Application Entry Point
PyQt5 Desktop Application
"""

import sys
from pathlib import Path

# Add parent directory to path so we can import app package
sys.path.insert(0, str(Path(__file__).parent.parent))

from PyQt5.QtWidgets import QApplication, QMessageBox
from PyQt5.QtCore import Qt

# Import configuration and models
from app import config
from app.database import get_database
from app.models import get_course
from app.views import MainWindow


def main():
    """Main application entry point"""

    # Create QApplication
    app = QApplication(sys.argv)
    app.setApplicationName(config.APP_NAME)
    app.setApplicationVersion(config.APP_VERSION)
    app.setOrganizationName(config.APP_AUTHOR)

    # Enable high DPI scaling
    app.setAttribute(Qt.AA_EnableHighDpiScaling, True)
    app.setAttribute(Qt.AA_UseHighDpiPixmaps, True)

    print("="*60)
    print(f"{config.APP_NAME} v{config.APP_VERSION}")
    print("="*60)

    try:
        # Initialize database
        print("[*] Initializing database...")
        db = get_database()
        print(f"[OK] Database ready: {db.db_path}")

        # Load course structure
        print("[*] Loading course structure...")
        course = get_course()
        print(f"[OK] Course loaded: {course.title}")

        # Validate lesson files
        print("[*] Validating lesson files...")
        if course.validate():
            print("[OK] All lesson files found")
        else:
            print("[WARN] Some lesson files missing (see above)")

        # Create and show main window
        print("[*] Creating main window...")
        window = MainWindow()
        window.show()

        print("[OK] Application ready!\n")

        # Run application event loop
        return app.exec_()

    except Exception as e:
        # Show error dialog
        print(f"\n[ERROR] {e}")
        import traceback
        traceback.print_exc()

        error_dialog = QMessageBox()
        error_dialog.setIcon(QMessageBox.Critical)
        error_dialog.setWindowTitle("Error")
        error_dialog.setText("Failed to initialize application")
        error_dialog.setInformativeText(str(e))
        error_dialog.setDetailedText(traceback.format_exc())
        error_dialog.exec_()

        return 1


if __name__ == '__main__':
    sys.exit(main())