import { request, redirectToLogin } from '../../utils/request'
import * as auth from '../../utils/auth'
import { PagedResult, OutfitItem } from '../../types/models'
import { OutfitSource, IsPublic, STORAGE_KEYS } from '../../utils/config'
import { normalizePaged, mergePaged, hasMorePaged } from '../../utils/paged'

Page({
  data: {
    activeTab: 0,
    list: [] as OutfitItem[],
    loading: true,
    refreshing: false,
    loadingMore: false,
    page: 1,
    pageSize: 20,
    hasMore: true,
  },

  onShow() {
    this.syncTabBar()
    // 未登录直接回登录页（幂等跳转），不再发出必然 401 的请求
    if (!auth.isLoggedIn()) {
      redirectToLogin()
      return
    }
    const openCollect = wx.getStorageSync(STORAGE_KEYS.OPEN_COLLECT)
    if (openCollect) {
      wx.removeStorageSync(STORAGE_KEYS.OPEN_COLLECT)
      if (this.data.activeTab !== 1) {
        this.setData({ activeTab: 1, list: [], loading: true })
      }
    }
    this.refresh()
  },

  syncTabBar() {
    const tabBar = (this as any).getTabBar && (this as any).getTabBar()
    if (tabBar) tabBar.setData({ selected: 1 })
  },

  onTabChange(e: WechatMiniprogram.TouchEvent) {
    const index = Number(e.currentTarget.dataset.index)
    if (index === this.data.activeTab) return
    this.setData({ activeTab: index, list: [], loading: true })
    this.refresh()
  },

  refresh() {
    this.setData({ page: 1, hasMore: true, loading: this.data.list.length === 0 })
    this.fetchList(1)
  },

  onRefresh() {
    this.setData({ refreshing: true })
    this.fetchList(1).finally(() => this.setData({ refreshing: false }))
  },

  onReachBottom() {
    if (!this.data.hasMore || this.data.loading || this.data.loadingMore) return
    this.fetchList(this.data.page + 1)
  },

  fetchList(page: number): Promise<void> {
    const isCollect = this.data.activeTab === 1
    const url = isCollect ? '/collect' : '/outfit'

    const seq = ((this as any).reqSeq || 0) + 1
    ;(this as any).reqSeq = seq
    if (page > 1) this.setData({ loadingMore: true })

    return request<PagedResult<OutfitItem>>({ url, data: { page, page_size: this.data.pageSize } })
      .then(async (res) => {
        const { list: raw, total } = normalizePaged<OutfitItem>(res)
        const items = await this.decorateList(raw)
        // decorateList 是异步的，期间可能已切换 tab：序号不匹配则丢弃
        if ((this as any).reqSeq !== seq) return
        const merged = mergePaged(this.data.list, items, page === 1)
        this.setData({
          list: merged,
          hasMore: hasMorePaged(merged, total, this.data.pageSize),
          loading: false,
          loadingMore: false,
          page,
        })
      })
      .catch(() => {
        if ((this as any).reqSeq !== seq) return
        this.setData({ loading: false, loadingMore: false })
      })
  },

  decorateList(list: OutfitItem[]): Promise<OutfitItem[]> {
    return Promise.all(
      list.map(async (it) => {
        let likeCount = 0
        try {
          const like = await request<{ is_liked: boolean; like_count: number }>({
            url: `/like/${it.outfit_uuid}`,
            showError: false,
          })
          likeCount = like.like_count
        } catch (e) {}
        return { ...it, _likeCount: likeCount, _status: this.getStatusText(it) }
      })
    )
  },

  getStatusText(it: OutfitItem): { text: string; type: string } {
    if (it.source === OutfitSource.AI) return { text: 'AI 推荐', type: 'indigo' }
    if (it.is_public === IsPublic.PUBLIC) return { text: '已公开', type: 'blue' }
    return { text: '仅自己可见', type: 'gray' }
  },

  onCreate() {
    wx.navigateTo({ url: '/pages/outfit-edit/outfit-edit' })
  },

  onAiRecommend() {
    wx.navigateTo({ url: '/pages/ai-recommend/ai-recommend' })
  },

  onOutfitTap(e: WechatMiniprogram.TouchEvent) {
    const uuid = e.currentTarget.dataset.uuid as string
    const owner = this.data.activeTab === 0 ? '1' : '0'
    wx.navigateTo({ url: `/pages/outfit-detail/outfit-detail?uuid=${uuid}&owner=${owner}` })
  },
})