import { request } from '../../utils/request'
import { ClothesItem, PagedResult, UserInfo } from '../../types/models'
import { STORAGE_KEYS } from '../../utils/config'
import { normalizePaged, hasMorePaged } from '../../utils/paged'

const CATEGORIES = [
  { name: '全部', value: '' },
  { name: '上装', value: '上装' },
  { name: '下装', value: '下装' },
  { name: '连衣裙', value: '连衣裙' },
  { name: '外套', value: '外套' },
  { name: '鞋', value: '鞋' },
  { name: '配饰', value: '配饰' },
]

const EXPIRE_OPTIONS = [
  { label: '1 天', days: 1 },
  { label: '7 天', days: 7 },
  { label: '30 天', days: 30 },
  { label: '长期有效', days: 0 },
]

const PAGE_SIZE = 50

Page({
  data: {
    view: 'config' as 'config' | 'select' | 'success',
    shareType: 1,
    expireDays: 7,
    expireOptions: EXPIRE_OPTIONS,
    selectedUuids: [] as string[],
    categories: CATEGORIES,
    activeCategory: 0,
    allClothes: [] as ClothesItem[],
    selectLoading: true,
    loadingMore: false,
    hasMore: true,
    page: 1,
    submitting: false,
    shareUuid: '',
    nickname: '微信用户',
    avatar: '',
    selectedCount: 0,
  },

  onLoad() {
    this.loadUserInfo()
  },

  loadUserInfo() {
    const cached = wx.getStorageSync(STORAGE_KEYS.USER_INFO) as Record<string, any>
    if (cached) {
      this.setData({ nickname: cached.username || '微信用户', avatar: cached.avatar || '' })
    }
    // 头像为带时间戳的签名 URL，缓存可能过期，实时刷新并回写缓存。
    request<UserInfo>({ url: '/user/info', showError: false })
      .then((user) => {
        wx.setStorageSync(STORAGE_KEYS.USER_INFO, user)
        this.setData({ nickname: user.username || '微信用户', avatar: user.avatar || '' })
      })
      .catch(() => {})
  },

  selectPartial() {
    this.setData({ shareType: 1 })
  },
  selectFull() {
    this.setData({ shareType: 2 })
  },
  selectExpire(e: WechatMiniprogram.TouchEvent) {
    const days = Number(e.currentTarget.dataset.days)
    this.setData({ expireDays: days })
  },

  openSelect() {
    this.setData({ view: 'select', selectLoading: true, page: 1, hasMore: true })
    this.fetchAllClothes(1)
  },

  fetchAllClothes(page = 1) {
    const cat = CATEGORIES[this.data.activeCategory].value
    const params: Record<string, any> = { page, page_size: PAGE_SIZE }
    if (cat) params.category_main = cat

    // 请求序号：切换分类时旧响应可能后到，序号不匹配直接丢弃
    const seq = ((this as any).reqSeq || 0) + 1
    ;(this as any).reqSeq = seq
    if (page > 1) this.setData({ loadingMore: true })

    request<PagedResult<ClothesItem>>({ url: '/clothes', data: params })
      .then((res) => {
        if ((this as any).reqSeq !== seq) return
        const { list: raw, total } = normalizePaged<ClothesItem>(res)
        const list = raw.map((it) => ({
          ...it,
          _selected: this.data.selectedUuids.indexOf(it.clothes_uuid) >= 0,
        }))
        const merged = page === 1 ? list : this.data.allClothes.concat(list)
        this.setData({
          allClothes: merged,
          selectLoading: false,
          loadingMore: false,
          page,
          hasMore: hasMorePaged(merged, total, PAGE_SIZE),
        })
      })
      .catch(() => {
        if ((this as any).reqSeq !== seq) return
        this.setData({ selectLoading: false, loadingMore: false })
      })
  },

  onCategoryTap(e: WechatMiniprogram.TouchEvent) {
    const index = Number(e.currentTarget.dataset.index)
    if (index === this.data.activeCategory) return
    this.setData({ activeCategory: index, selectLoading: true, page: 1, hasMore: true })
    this.fetchAllClothes(1)
  },

  onReachBottom() {
    if (this.data.view !== 'select') return
    if (!this.data.hasMore || this.data.selectLoading || this.data.loadingMore) return
    this.fetchAllClothes(this.data.page + 1)
  },

  onToggleSelect(e: WechatMiniprogram.CustomEvent) {
    const item = e.detail.item as ClothesItem
    const uuids = this.data.selectedUuids
    const idx = uuids.indexOf(item.clothes_uuid)
    if (idx >= 0) {
      this.syncSelect(uuids.filter((u) => u !== item.clothes_uuid))
    } else {
      this.syncSelect([...uuids, item.clothes_uuid])
    }
  },

  syncSelect(uuids: string[]) {
    this.setData({
      selectedUuids: uuids,
      allClothes: this.data.allClothes.map((it) => ({
        ...it,
        _selected: uuids.indexOf(it.clothes_uuid) >= 0,
      })),
    })
  },

  confirmSelect() {
    this.setData({ view: 'config', selectedCount: this.data.selectedUuids.length })
  },

  backToConfig() {
    this.setData({ view: 'config' })
  },

  onConfirm() {
    if (this.data.submitting) return
    const body: Record<string, any> = { share_type: this.data.shareType }
    if (this.data.shareType === 1) {
      if (!this.data.selectedUuids.length) {
        wx.showToast({ title: '请选择要分享的衣物', icon: 'none' })
        return
      }
      body.clothes_uuids = this.data.selectedUuids
    }
    const days = this.data.expireDays
    body.expire_time = days > 0 ? Math.floor(Date.now() / 1000) + days * 86400 : 0

    // 提交加锁：连点会重复创建分享、重复扣额度
    this.setData({ submitting: true })
    request<{ share_uuid: string }>({ url: '/closet-share', method: 'POST', data: body })
      .then((res) => this.setData({ shareUuid: res.share_uuid, view: 'success', submitting: false }))
      .catch(() => this.setData({ submitting: false }))
  },

  onViewShare() {
    wx.redirectTo({ url: `/pages/closet-share-detail/closet-share-detail?uuid=${this.data.shareUuid}` })
  },

  onDone() {
    wx.navigateBack()
  },
})