import os
import sys

from PyQt6.QtWidgets import QApplication

from core.app import StickyNoteApp


def main() -> int:
    os.environ["QT_AUTO_SCREEN_SCALE_FACTOR"] = "1"

    QApplication.setQuitOnLastWindowClosed(False)

    app = QApplication.instance()
    if app is None:
        app = QApplication(sys.argv)

    app.setQuitLockEnabled(False)

    existing = getattr(app, "_sticky_note_instance", None)
    if existing is not None:
        existing.raise_()
        existing.activateWindow()
        return 0

    window = StickyNoteApp()

    app._sticky_note_instance = window

    window.show()

    return app.exec()


if __name__ == "__main__":
    raise SystemExit(main())