import { useEffect } from "react";

import {
  bindScriptWorkspaceApi,
  editSessionHandle,
  useScriptWorkspaceStore,
} from "../state/scriptWorkspaceStore";

type ActivePage = "home" | "scripts" | "schedules" | "system";

/**
 * 必须在 layout 层挂载，不能放在 ScriptsPage。
 * 原因：心跳 / cleanup / beforeunload 需要在用户切到 /schedules 时仍运行，
 * 否则其他 tab 中的编辑会话锁会过期。
 */
export function useEditSessionLifecycle({
  activePage,
}: {
  activePage: ActivePage;
}) {
  // 1) 切到非 scripts 页时，如果当前有 active session，结束编辑
  useEffect(() => {
    if (activePage === "scripts") return;
    const editBusy = useScriptWorkspaceStore.getState().editBusy;
    if (editBusy) return;
    if (!editSessionHandle.current) return;
    void useScriptWorkspaceStore.getState().endEditing(true, false);
  }, [activePage]);

  // 2) 心跳 + cleanup 定时器（15s 心跳，60s 检查 cleanup）
  useEffect(() => {
    let heartbeatRunning = false;
    let cleanupRunning = false;
    const heartbeatTimer = window.setInterval(() => {
      if (heartbeatRunning) return;
      heartbeatRunning = true;
      void useScriptWorkspaceStore.getState().tickHeartbeats().finally(() => {
        heartbeatRunning = false;
      });
    }, 15 * 1000);
    const cleanupTimer = window.setInterval(() => {
      if (cleanupRunning) return;
      cleanupRunning = true;
      try {
        useScriptWorkspaceStore.getState().tickCleanup();
      } finally {
        cleanupRunning = false;
      }
    }, 60 * 1000);
    return () => {
      window.clearInterval(heartbeatTimer);
      window.clearInterval(cleanupTimer);
    };
  }, []);

  // 3) 卸载前释放编辑锁
  useEffect(() => {
    const handleUnload = () => {
      useScriptWorkspaceStore.getState().releaseActiveOnUnload();
    };
    window.addEventListener("beforeunload", handleUnload);
    return () => window.removeEventListener("beforeunload", handleUnload);
  }, []);

  // 4) layout 卸载时解绑 api
  useEffect(() => {
    return () => {
      bindScriptWorkspaceApi(null);
    };
  }, []);
}