/**
 * 订单状态轮询Mixin
 * 用于自动刷新订单状态
 * 2026-01-24
 */

export default {
  data() {
    return {
      pollingTimer: null,
      pollingInterval: 10000, // 默认10秒
      isPolling: false
    }
  },

  methods: {
    /**
     * 开始轮询
     * @param {Number} interval - 轮询间隔(毫秒)
     * @param {Function} callback - 轮询回调函数
     */
    startPolling(interval, callback) {
      if (this.isPolling) {
        console.log('[轮询] 已在轮询中,跳过')
        return
      }

      this.pollingInterval = interval || this.pollingInterval
      this.isPolling = true

      console.log(`[轮询] 开始轮询,间隔${this.pollingInterval}ms`)

      this.pollingTimer = setInterval(() => {
        // 检查页面是否可见(仅在H5环境中检查)
        // #ifdef H5
        if (typeof document !== 'undefined' && document.hidden) {
          console.log('[轮询] 页面不可见,跳过本次轮询')
          return
        }
        // #endif

        console.log('[轮询] 执行轮询回调')
        if (typeof callback === 'function') {
          callback()
        }
      }, this.pollingInterval)
    },

    /**
     * 停止轮询
     */
    stopPolling() {
      if (this.pollingTimer) {
        clearInterval(this.pollingTimer)
        this.pollingTimer = null
        this.isPolling = false
        console.log('[轮询] 已停止轮询')
      }
    },

    /**
     * 调整轮询频率
     * @param {Number} interval - 新的轮询间隔(毫秒)
     */
    adjustPollingInterval(interval) {
      if (this.isPolling) {
        this.stopPolling()
        this.startPolling(interval, this.pollingCallback)
      }
    }
  },

  // 页面隐藏时停止轮询
  onHide() {
    this.stopPolling()
  },

  // 页面卸载时停止轮询
  onUnload() {
    this.stopPolling()
  },

  // 页面显示时恢复轮询
  onShow() {
    if (this.pollingCallback && !this.isPolling) {
      this.startPolling(this.pollingInterval, this.pollingCallback)
    }
  }
}