var app = getApp();

Component({
  data: {
    selected: 0,
    tabs: []
  },

  lifetimes: {
    attached() {
      this._lastRole = '';
      this.updateTabs();
    }
  },

  pageLifetimes: {
    show() {
      this.updateTabs();
    }
  },

  methods: {
    // 仅当角色实际变化时才更新 tabs，避免无意义重渲染
    updateTabs() {
      var userType = app.globalData.userType || 'C';
      if (this._lastRole === userType) return;
      this._lastRole = userType;
      var tabs = app.globalData.ROLE_TABS[userType] || app.globalData.ROLE_TABS['C'];
      this.setData({ tabs: tabs });
    },

    switchTab(e) {
      var index = e.currentTarget.dataset.index;
      var pages = ['/pages/index/index', '/pages/service/service', '/pages/order/order', '/pages/my/my'];
      if (this.data.selected === index) return;
      wx.switchTab({ url: pages[index] });
    }
  }
});