const app = getApp();
const svc = require('../../services/exercise');
const planSvc = require('../../services/plan');
const favSvc = require('../../services/favorite');
const { iconName } = require('../../utils/icon-name');

function greeting() {
  const h = new Date().getHours();
  if (h < 6) return '夜深了，';
  if (h < 11) return '早上好，';
  if (h < 13) return '中午好，';
  if (h < 18) return '下午好，';
  if (h < 22) return '晚上好，';
  return '夜深了，';
}

function isLogin() {
  return !!wx.getStorageSync('access_token');
}

Page({
  data: {
    statusBarHeight: 20,
    stats: null,
    bodyParts: [],
    equipment: [],
    featured: [],
    collections: [],
    loading: true,
    quickEntries: [
      { key: 'recommend', label: '智能推荐', icon: 'sparkles', url: '/pages/recommend/recommend' },
      { key: 'bodyPart', label: '按部位', icon: 'accessibility', url: '/pages/category/category?dimension=bodyPart' },
      { key: 'equipment', label: '按器械', icon: 'dumbbell', url: '/pages/category/category?dimension=equipment' },
      { key: 'official', label: '官方计划', icon: 'clipboard-list', url: '/pages/collection/collection' },
      { key: 'myPlans', label: '我的计划', icon: 'folder-open', url: '/pages/my-plans/my-plans' },
      { key: 'mine', label: '我的', icon: 'user', url: '/pages/profile/profile' }
    ],
    // —— 轻量个性化（登录后）——
    isLogin: false,
    greeting: '',
    myPlans: [],
    myFavorites: [],
    todayRecommend: []
  },

  onLoad() {
    this.setData({ statusBarHeight: app.globalData.statusBarHeight || 20 });
    this.loadData();
  },

  onShow() {
    // tab 切回：已登录则静默刷新个性化（优先缓存）
    if (isLogin()) this.loadPersonal(true);
  },

  loadData() {
    this.setData({ loading: true });
    Promise.all([
      svc.getStats().catch(() => null),
      svc.listExercises({ pageSize: 8 }).catch(() => ({ items: [] })),
      svc.listCollections().catch(() => [])
    ]).then(([stats, list, collections]) => {
      const cols = (collections || []).map((c) => ({
        ...c,
        icon: iconName(c.emoji)
      }));
      this.setData({
        stats,
        bodyParts: (stats && stats.bodyParts) || [],
        equipment: (stats && stats.equipment) || [],
        featured: (list && list.items) || [],
        collections: cols,
        loading: false
      });
      if (isLogin()) this.loadPersonal(false);
    }).catch(() => {
      this.setData({ loading: false });
    });
  },

  // 轻量个性化：复用现有 API，纯前端聚合；silent=切 tab 静默刷新
  loadPersonal(silent) {
    if (!isLogin()) return;
    this.setData({ isLogin: true, greeting: greeting() });
    if (!silent) this.setData({ personalLoading: true });

    const CACHE_KEY = 'fc_personal_cache';
    const cached = wx.getStorageSync(CACHE_KEY);
    const now = Date.now();
    if (cached && now - (cached.ts || 0) < 5 * 60 * 1000 && !silent) {
      this.applyPersonal(cached.data);
      return;
    }

    Promise.all([
      planSvc.listMine().catch(() => []),
      favSvc.listExercises().catch(() => [])
    ]).then(([plans, favs]) => {
      const planArr = Array.isArray(plans) ? plans : (plans && plans.items) || [];
      const favArr = Array.isArray(favs) ? favs : (favs && favs.items) || [];
      const data = {
        myPlans: planArr.slice(0, 3).map((p) => ({
          id: p.id, name: p.name, count: p.exerciseCount || 0
        })),
        myFavorites: favArr.slice(0, 6),
        todayRecommend: (this.data.featured || []).slice(0, 3).map((e) => ({
          id: e.id, name: e.displayName || e.name,
          reason: '为你精选 · 高效入门'
        }))
      };
      wx.setStorageSync(CACHE_KEY, { ts: now, data });
      this.applyPersonal(data);
    }).catch(() => {
      this.setData({ personalLoading: false });
    });
  },

  applyPersonal(data) {
    this.setData({
      myPlans: data.myPlans,
      myFavorites: data.myFavorites,
      todayRecommend: data.todayRecommend,
      personalLoading: false
    });
  },

  goRecommend() {
    wx.navigateTo({ url: '/pages/recommend/recommend' });
  },

  onQuick(e) {
    wx.navigateTo({ url: e.currentTarget.dataset.url });
  },

  onSearch() {
    wx.navigateTo({ url: '/pages/search/search' });
  },

  onPlanTap(e) {
    const id = e.currentTarget.dataset.id;
    if (id) wx.navigateTo({ url: '/pages/plan-detail/plan-detail?id=' + encodeURIComponent(id) });
  },

  onExercise(e) {
    const id = (e.detail && e.detail.id) || (e.currentTarget && e.currentTarget.dataset.id);
    if (!id) return;
    wx.navigateTo({ url: '/pages/detail/detail?id=' + encodeURIComponent(id) });
  },

  onScanBodyPart(e) {
    const { value, label } = e.currentTarget.dataset;
    wx.navigateTo({
      url: '/pages/category/category?dimension=bodyPart&value=' +
        encodeURIComponent(value) + '&title=' + encodeURIComponent(label)
    });
  },

  onScanEquipment(e) {
    const { value, label } = e.currentTarget.dataset;
    wx.navigateTo({
      url: '/pages/category/category?dimension=equipment&value=' +
        encodeURIComponent(value) + '&title=' + encodeURIComponent(label)
    });
  },

  onCollection(e) {
    wx.navigateTo({
      url: '/pages/collection-detail/collection-detail?slug=' +
        encodeURIComponent(e.currentTarget.dataset.slug)
    });
  }
});