"""
DBClient — entry point.
"""
import sys
import os
from PyQt6.QtWidgets import QApplication
from PyQt6.QtCore import Qt
from PyQt6.QtGui import QFont

from app.utils.logger import setup_logging, install_qt_message_handler, get_logger
from app.main_window import MainWindow
from app.config.theme import apply_qss

log = get_logger(__name__)


def load_stylesheet(app: QApplication) -> None:
    apply_qss(app)   # reads theme from settings, falls back to dark


def main():
    # ── Logging must be set up before anything else ───────────────────────────
    setup_logging()

    # High DPI
    os.environ.setdefault("QT_ENABLE_HIGHDPI_SCALING", "1")

    app = QApplication(sys.argv)
    app.setApplicationName("DBClient")
    app.setApplicationDisplayName("DBClient")
    app.setApplicationVersion("1.0.0")
    app.setOrganizationName("DBClient")

    # Route Qt's own warning/critical messages into the Python log
    install_qt_message_handler()

    # Default font
    font = QFont("Segoe UI", 10)
    app.setFont(font)

    load_stylesheet(app)

    log.info("Starting MainWindow")
    window = MainWindow()
    window.show()

    log.info("Entering event loop")
    exit_code = app.exec()
    log.info("Application exited with code %d", exit_code)
    sys.exit(exit_code)


if __name__ == "__main__":
    main()