"""Desktop application entry point."""

from __future__ import annotations

import os
import sys
from collections.abc import Sequence

from PySide6.QtCore import QTimer
from PySide6.QtWidgets import QApplication, QMessageBox

from javis.config.settings import ConfigurationError, Settings
from javis.core.provider_router import ApprovalChoice
from javis.core.runtime import build_javis_runtime
from javis.memory.sqlite_store import SessionStoreError
from javis.memory.usage_store import UsageStoreError
from javis.ui.chat_controller import DesktopController
from javis.ui.main_window import MainWindow
from javis.ui.workers import ApprovalBridge


def run_gui(argv: Sequence[str] | None = None) -> int:
    application = QApplication.instance() or QApplication(list(argv or []))
    application.setApplicationName("Javis Desktop")
    approval_bridge = ApprovalBridge()
    try:
        settings = Settings.from_env()
        runtime = build_javis_runtime(
            settings,
            approval_callback=lambda _decision: ApprovalChoice.CANCEL,
            notice_callback=approval_bridge.notice_received.emit,
        )
    except (ConfigurationError, SessionStoreError, UsageStoreError) as exc:
        QMessageBox.critical(None, "Javis konnte nicht starten", str(exc))
        return 2
    window = MainWindow(DesktopController(runtime), approval_bridge)
    window.show()
    smoke_exit = os.environ.get("JAVIS_GUI_SMOKE_EXIT_MS")
    if smoke_exit:
        try:
            delay = max(1, min(int(smoke_exit), 10_000))
        except ValueError:
            delay = 500
        QTimer.singleShot(delay, application.quit)
    return application.exec()


def main() -> int:
    return run_gui(sys.argv)


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