"""采购工具的最小桌面应用入口。"""

from __future__ import annotations

import sys
from collections.abc import Sequence

from .core.errors import StateError
from .logging_policy import configure_application_logger
from .runtime import LocalStateRuntime, RuntimePaths


def select_application_argv(argv: Sequence[str] | None) -> list[str]:
    """保留调用方明确给出的空参数列表，避免改变测试或打包入口的语义。"""

    return list(sys.argv if argv is None else argv)


def main(argv: Sequence[str] | None = None) -> int:
    """启动只表达当前工程状态的桌面外壳。

    真机控制和采购执行必须在完成取证并实现后才可接入，因此此入口不导入
    uiautomator2，也不提供任何会影响采购或支付状态的命令。
    """

    try:
        paths = RuntimePaths.default()
        logger = configure_application_logger(paths)
    except OSError as error:
        print(f"无法创建采购工具运行目录：{error}", file=sys.stderr)
        return 1

    try:
        from PySide6.QtWidgets import QApplication
    except ImportError:
        logger.error("缺少 PySide6，无法启动桌面界面。")
        print("无法启动采购工具：缺少 PySide6。请先安装 requirements.txt 中的依赖。", file=sys.stderr)
        return 2

    application = QApplication.instance() or QApplication(select_application_argv(argv))
    application.setApplicationName("采购工具")
    runtime: LocalStateRuntime | None = None
    coordinator = None
    try:
        runtime = LocalStateRuntime.open(paths)
        try:
            summary = runtime.store.load_profile_summary("default")
        except StateError as error:
            if error.reason != "profile_not_found":
                raise
            summary = None

        from .polling.coordinator import PollingCoordinator
        from .ui.main_window import PurchaseToolWindow

        settings = None if summary is None else summary.settings
        has_token = False if summary is None else summary.has_stored_device_token
        coordinator = PollingCoordinator(
            profile_id="default",
            store=runtime.store,
            gateway_factory=None,
            consumer=None,
            profile_settings=settings,
            poll_interval_seconds=15 if settings is None else settings.poll_interval_seconds,
            failure_threshold=3 if settings is None else settings.failure_threshold,
        )
        window = PurchaseToolWindow(
            store=runtime.store,
            coordinator=coordinator,
            profile_settings=settings,
            has_stored_device_token=has_token,
        )
        logger.info("应用已启动；单趟执行能力尚未接入，真实领取保持禁用。")
        window.show()
        return application.exec()
    except (OSError, RuntimeError, StateError):
        logger.error("无法打开采购工具本地安全状态。")
        print("无法启动采购工具：本地安全状态不可用。", file=sys.stderr)
        return 3
    finally:
        worker_stopped = True
        if coordinator is not None:
            worker_stopped = coordinator.shutdown()
        if runtime is not None and worker_stopped:
            runtime.close()