Component({
  data: { visible: false, intro: false, state: 'loading', message: '' },
  lifetimes: {
    attached: function() {
      this._startedAt = Date.now();
      try { this._showIntro = !wx.getStorageSync('launchIntroSeen'); } catch (e) { this._showIntro = false; }
      if (this._showIntro) {
        this.setData({ visible: true, intro: true });
        // 设备首次展示即记住，跳转页面或再次启动都不会重复展示。
        try { wx.setStorageSync('launchIntroSeen', true); } catch (e) {}
      }
      this._unobserve = getApp().observeAuth((state, message) => {
        clearTimeout(this._exitTimer);
        if (state === 'ready') {
          this._retrying = false;
          if (this._showIntro) {
            this._exitTimer = setTimeout(() => {
              this._showIntro = false;
              this.setData({ visible: false, intro: false });
            }, Math.max(0, 350 - (Date.now() - this._startedAt)));
          } else {
            this.setData({ visible: false, intro: false });
          }
        } else if (state === 'error') {
          this._showIntro = false;
          this._retrying = true;
          this.setData({ visible: true, intro: false, state: state, message: message });
        } else {
          this.setData({ visible: !!(this._showIntro || this._retrying), intro: !!this._showIntro, state: state, message: message });
        }
      });
    },
    detached: function() {
      clearTimeout(this._exitTimer);
      if (this._unobserve) this._unobserve();
    }
  },
  methods: {
    preventMove: function() {},
    retry: async function() {
      try {
        await getApp().silentLogin();
        // 重新加载失败的页面，保留分享链接、相册 id 等原始入口参数。
        var pages = getCurrentPages();
        var page = pages[pages.length - 1];
        if (!page) return;
        var query = Object.keys(page.options || {}).map(function(key) {
          return encodeURIComponent(key) + '=' + encodeURIComponent(page.options[key]);
        }).join('&');
        wx.reLaunch({ url: '/' + page.route + (query ? '?' + query : '') });
      } catch (error) {
        // App 已发布失败状态，保留重试画面。
      }
    }
  }
});