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

function fmtAgo(iso) {
  if (!iso) return '';
  const d = new Date(iso);
  if (isNaN(d.getTime())) return '';
  const min = Math.floor((Date.now() - d.getTime()) / 60000);
  if (min < 1) return '刚刚';
  if (min < 60) return min + ' 分钟前';
  if (min < 60 * 24) return Math.floor(min / 60) + ' 小时前';
  if (min < 60 * 24 * 7) return Math.floor(min / 1440) + ' 天前';
  const p = (n) => (n < 10 ? '0' + n : '' + n);
  return p(d.getMonth() + 1) + '-' + p(d.getDate());
}

Page({
  data: { uid: '', card: null, posts: [], page: 1, hasMore: false, loading: true },
  onLoad(q) {
    const uid = q && q.id;
    if (!uid) return wx.showToast({ title: '缺少用户', icon: 'none' });
    this.setData({ uid });
    this.loadCard();
    this.loadPosts(1);
  },
  loadCard() {
    api
      .userCard(this.data.uid)
      .then((card) => this.setData({ card, loading: false }))
      .catch((e) => {
        this.setData({ loading: false });
        toastErr(e);
      });
  },
  loadPosts(page) {
    api
      .userPosts(this.data.uid, page)
      .then((res) => {
        const list = (res.list || []).map((p) => ({ ...p, timeText: fmtAgo(p.created_at) }));
        const merged = page === 1 ? list : this.data.posts.concat(list);
        this.setData({ posts: merged, page, hasMore: merged.length < (res.total || 0) });
      })
      .catch(() => {});
  },
  loadMore() {
    if (this.data.hasMore) this.loadPosts(this.data.page + 1);
  },
  // 关注状态先本地翻转，请求失败再翻回去——等接口返回按钮才变会显得很迟钝
  toggleFollow() {
    const c = this.data.card;
    if (!c || c.is_self) return;
    const next = !c.followed;
    this.setData({
      'card.followed': next,
      'card.follower_count': Math.max(0, c.follower_count + (next ? 1 : -1)),
    });
    (next ? api.followUser(c.id) : api.unfollowUser(c.id)).catch((e) => {
      this.setData({ 'card.followed': !next, 'card.follower_count': c.follower_count });
      toastErr(e, '操作失败');
    });
  },
  goRelations(e) {
    const kind = e.currentTarget.dataset.kind;
    wx.navigateTo({ url: `/pages/relations/relations?id=${this.data.uid}&kind=${kind}` });
  },
  previewImage(e) {
    const { urls, cur } = e.currentTarget.dataset;
    if (urls && urls.length) wx.previewImage({ urls, current: cur });
  },
  onShareAppMessage() {
    const n = (this.data.card && this.data.card.nickname) || '宠友';
    return { title: `${n} 的主页`, path: `/pages/user/user?id=${this.data.uid}` };
  },
});