const node_schedule = require("node-schedule");
const logs = require('../tool/logs_proxy');

class Schedule {
  // 执行标记，防止并发执行
  constructor() {
    this.running_flags = {
     
    };
  }

  /**
   * 执行带锁的任务
   * @param {string} task_name - 任务名称
   * @param {Function} task_fn - 任务函数
   */
  async execute_with_lock(task_name, task_fn) {
    // 如果正在执行，跳过本次执行
    if (this.running_flags[task_name]) {
      logs.log(`[定时任务] ${task_name} 正在执行中，跳过本次执行`);
      return;
    }

    // 设置执行标记
    this.running_flags[task_name] = true;

    try {
      await task_fn();
    } catch (error) {
      logs.error(`[定时任务] ${task_name} 执行失败:`, error);
    } finally {
      // 清除执行标记
      this.running_flags[task_name] = false;
    }
  }

  async init() {
    const bizSubscriptionLogic = require("../api/service/biz_subscription_logic");

    node_schedule.scheduleJob("10 0 * * *", async () => {
      await this.execute_with_lock("biz_subscription_expire", async () => {
        const n = await bizSubscriptionLogic.expireDueSubscriptions();
        logs.log(`[定时任务] 订阅到期扫描完成，更新行数: ${n}`);
      });
    });
  }
}

const schedule = new Schedule();
module.exports = schedule;

