main.py

import sys
import os
import tempfile
from PySide6.QtWidgets import QApplication, QMessageBox
from PySide6.QtCore import Qt, QLockFile
from PySide6.QtGui import QFontDatabase, QFont

from services.logger_service import setup_logging
logger = setup_logging()

import core.constants as const
from data.db_manager import DBManager
from core.engine import GameEngine
from services.settings_manager import SettingsManager
from services.tts import create_tts
from services.audio_service import AudioService
from ui.view_models.game_view_model import GameViewModel
from ui.windows.main_window import MainWindow

def main():
    # 1. Initialize QApplication first (Required before creating any UI elements like QMessageBox)
    app = QApplication(sys.argv)
    app.setLayoutDirection(Qt.LayoutDirection.RightToLeft)

    # 2. Prevent multiple instances using a lock file
    lock_path = os.path.join(tempfile.gettempdir(), "ilmquiz.lock")
    lock_file = QLockFile(lock_path)
    
    # Try to lock for 100ms, if fails, another instance is running
    if not lock_file.tryLock(100):
        logger.warning("Another instance of IlmQuiz is already running. Exiting.")
        # Show a warning message to the user instead of silent exit
        QMessageBox.warning(
            None,
            "اللعبة قيد التشغيل",
            "لعبة IlmQuiz تعمل بالفعل في الخلفية أو في نافذة أخرى.\nلا يمكن تشغيل أكثر من نسخة في نفس الوقت."
        )
        sys.exit(0)

    # 3. Load Cairo Font from assets
    font_path = os.path.join(const.BASE_DIR, "assets", "fonts", "Cairo-Regular.ttf")
    if os.path.exists(font_path):
        font_id = QFontDatabase.addApplicationFont(font_path)
        if font_id != -1:
            font_family = QFontDatabase.applicationFontFamilies(font_id)[0]
            app.setFont(QFont(font_family, 11))
            logger.info(f"Custom font 'Cairo' loaded and set as default.")
    else:
        logger.warning(f"Font file not found at {font_path}. Using system default.")

    # Initialize Services
    settings_manager = SettingsManager()
    db_manager = DBManager()
    audio_service = AudioService()
    game_engine = GameEngine()
    tts_service = create_tts()
    
    view_model = GameViewModel(
        db_manager=db_manager,
        game_engine=game_engine,
        tts_service=tts_service,
        audio_service=audio_service,
        settings_manager=settings_manager
    )

    view_model.apply_theme()
    window = MainWindow(view_model)
    window.show()
    
    exit_code = app.exec()
    
    if hasattr(tts_service, 'shutdown'):
        tts_service.shutdown()
        
    sys.exit(exit_code)

if __name__ == "__main__":
    main()