const LIST = [
  { pagePath: '/pages/home/home', text: '首页', icon: 'home' },
  { pagePath: '/pages/record/record', text: '记录', icon: 'record' },
  { pagePath: '/pages/report/report', text: '报告', icon: 'report' },
  { pagePath: '/pages/community/community', text: '社区', icon: 'community' },
  { pagePath: '/pages/mine/mine', text: '我的', icon: 'user' },
];

Component({
  data: { selected: 0, hidden: false, list: LIST },
  // 高亮由当前页面路径自己算出来。
  // 原来每个 tab 页在 onShow 里硬写 selected: 0/1/2/3/4，调一次顺序就要同时改
  // 五个文件，漏一个就高亮错位——这次把计划换成我的正好会踩到。
  pageLifetimes: {
    show() {
      this.syncSelected();
    },
  },
  lifetimes: {
    attached() {
      this.syncSelected();
    },
  },
  methods: {
    syncSelected() {
      const pages = getCurrentPages();
      const cur = pages[pages.length - 1];
      if (!cur) return;
      const path = '/' + cur.route;
      const i = LIST.findIndex((t) => t.pagePath === path);
      if (i >= 0 && i !== this.data.selected) this.setData({ selected: i });
    },
    switchTab(e) {
      wx.switchTab({ url: LIST[e.currentTarget.dataset.index].pagePath });
    },
  },
});