const store = require('../../utils/store.js');
const api = require('../../utils/api.js');
const { toastErr } = require('../../utils/ui.js');
const recordTypes = require('../../utils/recordTypes.js');

function pad(n) {
  return n < 10 ? '0' + n : '' + n;
}
function fmtTime(iso) {
  if (!iso) return '';
  const d = new Date(iso);
  const now = new Date();
  const hm = pad(d.getHours()) + ':' + pad(d.getMinutes());
  if (d.toDateString() === now.toDateString()) return '今天 ' + hm;
  const y = new Date(now.getTime() - 86400000);
  if (d.toDateString() === y.toDateString()) return '昨天 ' + hm;
  return d.getMonth() + 1 + '月' + d.getDate() + '日';
}
// 每条记录的分组配色。这页只读历史，引一份轻量的 code→组 映射就够
function toneOf(type) {
  const t = recordTypes.get(type);
  return (t && t.tone) || 'tone-1';
}
function mapRecord(r) {
  return {
    id: r.id,
    // 图标按 type 取（可靠）；老数据 icon 字段里的 emoji 只作兜底
    type: r.type || r.icon || '',
    tone: toneOf(r.type),
    title: r.title,
    desc: fmtTime(r.occurred_at) + (r.description ? '｜' + r.description : ''),
    image: r.image_url || '',
  };
}

// 时间轴类型筛选。常用的一组，不是全部 24 种——seg-tabs 放满会挤成一条难点的横条
const REC_FILTERS = [
  { key: '', label: '全部' },
  { key: 'weight', label: '体重' },
  { key: 'poop', label: '排便' },
  { key: 'food', label: '饮食' },
  { key: 'symptom', label: '异常' },
  { key: 'vaccine', label: '疫苗' },
  { key: 'cost', label: '记账' },
  { key: 'photo', label: '照片' },
];

const REC_PAGE = 8;

Page({
  data: {
    pet: {},
    timeline: [],
    recPage: 1,
    recTotal: 0,
    recHasMore: false,
    recFilters: REC_FILTERS,
    recFilterIdx: 0,
  },
  onLoad() {
    this._unsub = store.subscribe((pet) => {
      this.setData({ pet });
      if (!this._inited) return;
      this.loadRecords();
    });
  },
  onUnload() {
    if (this._unsub) this._unsub();
  },
  onShow() {
    // 分组配色要读类型缓存。这页可能直接从报告页进来，缓存没经过首页热过，
    // 自己拉一次（load 内部只真请求一次），拉完刷新已有列表的配色
    recordTypes.load().then(() => this.setData({ timeline: this.data.timeline.map((t) => ({ ...t, tone: toneOf(t.type) })) })).catch(() => {});
    store
      .ready()
      .then(() => {
        this._inited = true;
        this.setData({ pet: store.getPet() });
        this.loadRecords();
      })
      .catch((e) => wx.showToast({ title: e.message || '加载失败', icon: 'none' }));
  },
  curFilter() {
    return this.data.recFilters[this.data.recFilterIdx].key;
  },
  onFilterTap(e) {
    const i = Number(e.detail.index);
    if (i === this.data.recFilterIdx) return;
    this.setData({ recFilterIdx: i }, () => this.loadRecords());
  },
  loadRecords() {
    const id = store.currentPetId();
    if (!id) return;
    api
      .getRecords(id, { page: 1, pageSize: REC_PAGE, type: this.curFilter() })
      .then((res) => {
        const list = (res.list || []).map(mapRecord);
        this.setData({ timeline: list, recPage: 1, recTotal: res.total || 0, recHasMore: list.length < (res.total || 0) });
      })
      .catch((e) => toastErr(e));
  },
  loadMoreRecords() {
    const id = store.currentPetId();
    if (!id) return;
    const next = this.data.recPage + 1;
    api
      .getRecords(id, { page: next, pageSize: REC_PAGE, type: this.curFilter() })
      .then((res) => {
        const merged = this.data.timeline.concat((res.list || []).map(mapRecord));
        this.setData({ timeline: merged, recPage: next, recTotal: res.total || 0, recHasMore: merged.length < (res.total || 0) });
      })
      .catch(() => {});
  },
  collapseRecords() {
    this.loadRecords();
  },
  onDeleteRecord(e) {
    const r = this.data.timeline[e.currentTarget.dataset.index];
    if (!r || !r.id) return;
    wx.showModal({
      title: '删除记录',
      content: '确定删除「' + r.title + '」？删除后不可恢复。',
      confirmColor: '#D9534F',
      success: (res) => {
        if (!res.confirm) return;
        api
          .deleteRecord(r.id)
          .then(() => {
            wx.showToast({ title: '已删除', icon: 'success' });
            this.loadRecords();
          })
          .catch((err) => wx.showToast({ title: err.message || '删除失败', icon: 'none' }));
      },
    });
  },
  previewImage(e) {
    const src = e.currentTarget.dataset.src;
    if (src) wx.previewImage({ urls: [src], current: src });
  },
  onAddPet() {
    wx.navigateTo({ url: '/pages/petform/petform' });
  },
  onShareAppMessage() {
    return { title: '用肉垫计划记录毛孩子的成长', path: '/pages/record/record' };
  },
  onShareTimeline() {
    return { title: '用肉垫计划记录毛孩子的成长' };
  },
});