const { withRecordAccess } = require('../../utils/record-access');
const { tryLoginRenewal } = require('../../utils/subscribe');
const { itemsOf, startList, applyList, failList, finishList, withListPagination } = require('../../utils/list-pagination');
const { withDataCache } = require('../../utils/page-cache');
const { getLayout } = require('../../utils/layout');
// Diary journal with server pagination.
const { api, getImageUrl } = require('../../utils/request');
const { diaryEntry } = require('../../utils/journal');
const { saveScrollPosition, getScrollPosition } = require('../../utils/scroll-pos');
Page(withRecordAccess(withDataCache(withListPagination({
  onLoginSubscribeTap: function() { return tryLoginRenewal(); },
  onResize: function() { this.setData(getLayout()); },
  data: {
    loading: true, loadError: false,
    list: [],
    page: 1,
    pageSize: 20,
    total: 0,
    loadingMore: false,
    hasMore: true,
    scrollTop: 0,
    tabType: 'all' // 'all' 全部 | 'favorite' 收藏
  },

  onLoad: function(options) {
    this.setData(getLayout());
    this.setData({ scrollTop: getScrollPosition('diary') });
  },
  onShow: function() {
    this.loadData();
  },

  // 收藏 tab 切换已移除

  onScroll: function(e) {
    this._scrollTop = e.detail.scrollTop;
    saveScrollPosition('diary', e.detail.scrollTop);
  },

  onPullDownRefresh: async function() {
    this.setData({ page: 1, list: [], hasMore: true });
    await this.loadData();
    wx.stopPullDownRefresh();
  },

  onScrollToLower: function() {
    if (this.data.loadingMore || !this.data.hasMore) return;
    this.loadMore();
  },

  onShareAppMessage: function() {
    return { title: '让所有的爱有迹可循', path: '/pages/diary/diary', imageUrl: '/images/share.png' };
  },
  onShareTimeline: function() {
    return { title: '让所有的爱有迹可循', imageUrl: '/images/share.png' };
  },

  loadData: async function(page) {
    const ticket=startList(this,page);if(!ticket)return;
    try {
      const data=await api.diaryList({page:ticket.page,page_size:20});
      applyList(this,ticket,data,this._formatItems(itemsOf(data)),'list');
      this._loadPartnerInfo();
    } catch(e) { failList(this,ticket); }
    finally { finishList(this,ticket); }
  },

  _formatItems: function(items) {
    var myUid = wx.getStorageSync('userId');
    var partnerNames = {};
    var partnerAvatars = {};
    return items.map(function(item) {
      item.creator_name = partnerNames[item.created_by] || '我';
      item.creator_avatar = partnerAvatars[item.created_by] || '';
      item.created_time = item.created_at ? item.created_at.substring(0, 16).replace('T', ' ') : '';
      var imgs = item.images || [];
      if (typeof imgs === 'string') {
        try { imgs = JSON.parse(imgs); } catch(e) { imgs = []; }
      }
      if (!Array.isArray(imgs)) imgs = [];
      item.imageUrls = imgs.map(function(p) { return getImageUrl(p); });
      // 生成摘要文本（截断内容，用于无图卡片展示）
      var summaryText = item.content || item.title || '';
      summaryText = summaryText.replace(/\s+/g, ' ');
      if (summaryText.length > 80) summaryText = summaryText.substring(0, 80) + '...';
      item.summary = summaryText;
      // 地理位置：优先显示地址名称，其次显示经纬度
      item.location_text = item.location || ((item.lat && item.lng) ? (item.lat + ', ' + item.lng) : '');
      return Object.assign(item, diaryEntry(item));
    });
  },

  _loadPartnerInfo: async function() {
    try {
      var info = await api.coupleInfo();
      var myUid = wx.getStorageSync('userId');
      var p1 = info.partner1 || {}, p2 = info.partner2 || {};
      var names = {}, avatars = {};
      names[p1.id] = p1.nickname || p1.username || 'TA';
      names[p2.id] = p2.nickname || p2.username || 'TA';
      avatars[p1.id] = getImageUrl(p1.avatar);
      avatars[p2.id] = getImageUrl(p2.avatar);
      var oldList = this.data.list;
      var changed = false;
      var updates = {};
      for (var i = 0; i < oldList.length; i++) {
        var item = oldList[i];
        var newName = names[item.created_by] || '我';
        var newAvatar = avatars[item.created_by] || '';
        if (item.creator_name !== newName || item.creator_avatar !== newAvatar) {
          updates['list[' + i + '].creator_name'] = newName;
          updates['list[' + i + '].author'] = newName;
          updates['list[' + i + '].creator_avatar'] = newAvatar;
          changed = true;
        }
      }
      if (changed) {
        this.setData(updates);
      }
    } catch (e) {}
  },

  _refreshPartnerInfo: function() {
    var self = this;
    api.coupleInfo().then(function(info) {
      var myUid = wx.getStorageSync('userId');
      var p1 = info.partner1 || {}, p2 = info.partner2 || {};
      var names = {}, avatars = {};
      names[p1.id] = p1.nickname || p1.username || 'TA';
      names[p2.id] = p2.nickname || p2.username || 'TA';
      avatars[p1.id] = getImageUrl(p1.avatar);
      avatars[p2.id] = getImageUrl(p2.avatar);
      var oldList = self.data.list;
      var changed = false;
      var updates = {};
      for (var i = 0; i < oldList.length; i++) {
        var item = oldList[i];
        var newName = names[item.created_by] || '我';
        var newAvatar = avatars[item.created_by] || '';
        if (item.creator_name !== newName || item.creator_avatar !== newAvatar) {
          updates['list[' + i + '].creator_name'] = newName;
          updates['list[' + i + '].author'] = newName;
          updates['list[' + i + '].creator_avatar'] = newAvatar;
          changed = true;
        }
      }
      if (changed) {
        self.setData(updates);
      }
    }).catch(function() {});
  },

  // 点击进入日记详情
  goToDetail: function(e) {
    var id = e.currentTarget.dataset.id;
    if (!id) return;
    saveScrollPosition('diary', this._scrollTop == null ? this.data.scrollTop : this._scrollTop);
    wx.navigateTo({ url: '/pages/diary_detail/diary_detail?id=' + id });
  },

  _savePosBeforeLeave: function() {
    saveScrollPosition('diary', this._scrollTop == null ? this.data.scrollTop : this._scrollTop);
  },

  openJournalEntry: function(e) { this.goToDetail(e); },
  goToPublish: function() { this._savePosBeforeLeave(); wx.navigateTo({ url: '/pages/publish/publish?type=diary' }); },
  goHome: function() { this._savePosBeforeLeave(); wx.switchTab({ url: '/pages/index/index' }); },
  goBack: function() { wx.navigateBack(); },
  goProfile: function() { this._savePosBeforeLeave(); wx.switchTab({ url: '/pages/profile/profile' }); }
}, 'loadData'), {"loadData": ["diaryList", "coupleInfo"]})));