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

function mapTask(t) {
  return { id: t.id, title: t.title, sub: t.description, priority: t.priority, done: t.done, sheet: t.sheet_type };
}

// 时间轴上的相对时间。首页关心的是「什么时候记的」，精确到分只在今天有意义
function fmtWhen(iso) {
  if (!iso) return '';
  const d = new Date(iso);
  if (isNaN(d.getTime())) return '';
  const p = (n) => (n < 10 ? '0' + n : '' + n);
  const now = new Date();
  const sameDay = d.toDateString() === now.toDateString();
  if (sameDay) return '今天 ' + p(d.getHours()) + ':' + p(d.getMinutes());
  const y = new Date(now.getTime() - 86400000);
  if (d.toDateString() === y.toDateString()) return '昨天 ' + p(d.getHours()) + ':' + p(d.getMinutes());
  return d.getMonth() + 1 + '月' + d.getDate() + '日';
}

const TL_PAGE = 10;

Page({
  data: {
    pet: {},
    zodiac: '',
    daysTogether: 0,
    sexIcon: '',
    sexTone: '',
    tasks: [],
    planHint: '',
    drift: {},
    needNextPlan: false,
    monthCost: 0,
    timeline: [],
    tlPage: 1,
    hasMore: false,
  },
  onLoad() {
    this._unsub = store.subscribe((pet) => {
      this.applyPet(pet);
      if (!this._inited) return;
      this.loadAll();
    });
  },
  onUnload() {
    if (this._unsub) this._unsub();
  },
  onShow() {
    syncTabBar(this);
    recordTypes.load().catch(() => {});
    store
      .ready()
      .then(() => {
        this._inited = true;
        this.applyPet(store.getPet());
        this.loadAll();
      })
      .catch((e) => wx.showToast({ title: e.message || '加载失败', icon: 'none' }));
  },
  // 门面上那几样都是本地算的，不用等接口
  applyPet(pet) {
    const p = pet || {};
    const badge = petmeta.genderBadge(p.gender);
    this.setData({
      pet: p,
      zodiac: petmeta.zodiac(p.birthday),
      daysTogether: petmeta.daysTogether(p),
      sexIcon: badge.icon,
      sexTone: badge.tone,
    });
  },
  loadAll() {
    this.loadTasks();
    this.loadTimeline(1);
    this.loadEntries();
    this.loadDrift();
  },
  loadTasks() {
    const id = store.currentPetId();
    if (!id) return;
    api
      .getTasks(id)
      .then((tasks) => this.setData({ tasks: (tasks || []).map(mapTask) }))
      .catch((e) => toastErr(e));
  },
  // 两个入口上的副标题：计划还剩几件、本月花了多少。
  // 空着的话入口就是两个没有信息量的图标
  // 阶段漂移检查。放在 loadEntries 里而不是单独一次 —— 它和「计划还剩几件」
  // 都是首页那一屏要的，一起拉省一个来回
  loadDrift() {
    const id = store.currentPetId();
    if (!id) return;
    api
      .petStageDrift(id)
      .then((d) => this.setData({ drift: d || {} }))
      .catch(() => this.setData({ drift: {} }));
  },
  loadEntries() {
    const id = store.currentPetId();
    if (!id) return;
    // 副标题优先说「该排下月计划了」——那是有时效的事；
    // 本月还剩几件是随时能看的，让位给它
    api
      .planMonthStatus(id)
      .then((st) => {
        const s = st || {};
        this.setData({
          needNextPlan: !!s.need_next,
          planHint: s.need_next
            ? (s.next_label || '下月') + '计划还没排'
            : s.this_undone > 0
              ? '本月还有 ' + s.this_undone + ' 件'
              : s.this_month > 0
                ? '本月都做完了'
                : '还没有安排',
        });
      })
      .catch(() => this.setData({ needNextPlan: false, planHint: '' }));
    api
      .getBill(id, 'month')
      .then((b) => this.setData({ monthCost: (b && b.total) || 0 }))
      .catch(() => this.setData({ monthCost: 0 }));
  },
  loadTimeline(page) {
    const id = store.currentPetId();
    if (!id) return;
    api
      .getRecords(id, { page, pageSize: TL_PAGE })
      .then((res) => {
        const list = (res.list || []).map((r) => ({
          id: r.id,
          type: r.type,
          tone: (recordTypes.get(r.type) || {}).tone || 'tone-1',
          title: r.title,
          description: r.description,
          image: r.image_url || '',
          timeText: fmtWhen(r.occurred_at),
        }));
        const merged = page === 1 ? list : this.data.timeline.concat(list);
        this.setData({ timeline: merged, tlPage: page, hasMore: merged.length < (res.total || 0) });
      })
      .catch(() => {});
  },
  loadMore() {
    if (this.data.hasMore) this.loadTimeline(this.data.tlPage + 1);
  },
  previewImage(e) {
    const url = e.currentTarget.dataset.url;
    if (url) wx.previewImage({ urls: [url], current: url });
  },
  onDeleteRecord(e) {
    const id = e.currentTarget.dataset.id;
    wx.showModal({
      title: '删掉这条记录？',
      content: '趋势和统计会跟着变。',
      confirmColor: '#EE7D73',
      success: (r) => {
        if (!r.confirm) return;
        api
          .deleteRecord(id)
          .then(() => this.loadTimeline(1))
          .catch((err) => toastErr(err, '删除失败'));
      },
    });
  },
  onTapTask(e) {
    const i = e.currentTarget.dataset.index;
    const t = this.data.tasks[i];
    // 任务关联了记录类型：去记那一笔。未完成的带上 taskId，
    // 在记录页保存成功后才回填这条任务完成（onShow 回来自动刷新任务+最近记录）
    if (t.sheet) {
      let url = '/pages/addrecord/addrecord?type=' + t.sheet;
      if (!t.done) url += '&taskId=' + t.id;
      wx.navigateTo({ url });
      return;
    }
    // 没有关联记录类型的任务（如遛狗），直接切换完成
    api
      .toggleTask(t.id)
      .then((res) => {
        const tasks = this.data.tasks.slice();
        tasks[i] = Object.assign({}, tasks[i], { done: res.done });
        this.setData({ tasks });
      })
      .catch((err) => toastErr(err, '操作失败'));
  },
  goPlan() {
    wx.navigateTo({ url: '/pages/plan/plan' });
  },
  // 去建档页改阶段。改完回来 onShow 会重新拉一次漂移状态，提示自然消失。
  // 不在首页直接改：改阶段之后要不要套新方案是同一件事，放在一起做才连贯
  // 点「一起生活的天数」空态，去建档页补到家日期
  onDaysTap() {
    const id = this.data.pet && this.data.pet.id;
    if (!this.data.daysTogether && id) wx.navigateTo({ url: '/pages/petform/petform?id=' + id });
  },
  // 身份卡：门面卡右上角进，用当前宠物
  goIDCard() {
    const id = this.data.pet && this.data.pet.id;
    if (id) wx.navigateTo({ url: '/pages/idcard/idcard?id=' + id });
  },
  goStageUpdate() {
    const id = this.data.pet && this.data.pet.id;
    if (id) wx.navigateTo({ url: '/pages/petform/petform?id=' + id });
  },
  goExpense() {
    wx.navigateTo({ url: '/pages/expense/expense' });
  },
  goRecord() {
    wx.navigateTo({ url: '/pages/record/record' });
  },
  onQuickRecord() {
    wx.navigateTo({ url: '/pages/record/record' });
  },
  onAddPet() {
    wx.navigateTo({ url: '/pages/petform/petform' });
  },
  onHeroTap() {
    const id = this.data.pet && this.data.pet.id;
    wx.navigateTo({ url: '/pages/petform/petform' + (id ? '?id=' + id : '') });
  },
  onShareAppMessage() {
    return { title: '肉垫计划 · 每天照顾好毛孩子', path: '/pages/home/home' };
  },
  onShareTimeline() {
    return { title: '肉垫计划 · 每天照顾好毛孩子' };
  },
});