import type { Server } from "node:http";

import { stopScheduledJobs } from "../services/scheduler/scheduler-service.js";
import { closeOcrService } from "../services/session/ocr.js";
import { closeAllTencentBrowserSessions } from "../services/session/session.js";
import { logError, logInfo } from "../utils/logger.js";
import type { StartupState } from "./state.js";

export function createShutdownController(server: Server, startupState: StartupState) {
  let shutdownStarted = false;

  async function shutdown(signal: string) {
    if (shutdownStarted) {
      return;
    }

    shutdownStarted = true;
    startupState.phase = "shutting_down";
    logInfo("[shutdown]", `received ${signal}, closing browser sessions and HTTP server`);

    stopScheduledJobs();

    try {
      await closeAllTencentBrowserSessions({ markClosed: true });
    } catch (error) {
      logError("[shutdown]", "failed to close browser sessions", error);
    }

    try {
      await closeOcrService();
    } catch (error) {
      logError("[shutdown]", "failed to close OCR service", error);
    }

    if (!server.listening) {
      return;
    }

    await new Promise<void>((resolve) => {
      server.close((error) => {
        if (error) {
          logError("[shutdown]", "failed to close HTTP server", error);
          process.exitCode = 1;
        }

        resolve();
      });
    });
  }

  return {
    isShutdownStarted: () => shutdownStarted,
    shutdown,
  };
}