from __future__ import annotations

import sys
from pathlib import Path

import servicemanager
import win32event
import win32service
import win32serviceutil

if __package__ in {None, ""}:
    sys.path.insert(0, str(Path(__file__).resolve().parents[1]))

from bakrest.config import load_config
from bakrest.logging_setup import configure_logging
from bakrest.watcher import WatchdogRuntime


class BakRestWatchdogService(win32serviceutil.ServiceFramework):
    _svc_name_ = "BakRestWatchdog"
    _svc_display_name_ = "Bak&Rest Watchdog Service"
    _svc_description_ = "Monitors configured folders and records file changes for Bak&Rest backups."

    def __init__(self, args: list[str]) -> None:
        super().__init__(args)
        self.stop_event_handle = win32event.CreateEvent(None, 0, 0, None)
        self.runtime: WatchdogRuntime | None = None

    def SvcStop(self) -> None:
        self.ReportServiceStatus(win32service.SERVICE_STOP_PENDING)
        if self.runtime:
            self.runtime.stop()
        win32event.SetEvent(self.stop_event_handle)

    def SvcDoRun(self) -> None:
        servicemanager.LogMsg(
            servicemanager.EVENTLOG_INFORMATION_TYPE,
            servicemanager.PYS_SERVICE_STARTED,
            (self._svc_name_, ""),
        )
        config = load_config()
        logger = configure_logging(config.storage.logs_dir, "service")
        logger.info("Windows service started with configuration: %s", config.path)
        self.runtime = WatchdogRuntime(config, logger)
        try:
            self.runtime.run()
        except Exception:
            logger.exception("BakRestWatchdog failed")
            raise


def main() -> None:
    _apply_configured_startup()
    win32serviceutil.HandleCommandLine(BakRestWatchdogService)


def _apply_configured_startup() -> None:
    if len(sys.argv) < 2 or sys.argv[1].lower() != "install":
        return
    if "--startup" in sys.argv:
        return

    config = load_config()
    startup = "auto" if config.service_autostart else "manual"
    sys.argv.extend(["--startup", startup])


if __name__ == "__main__":
    main()