import { request, redirectToLogin } from '../../utils/request'
import * as auth from '../../utils/auth'
import { PagedResult, ClothesItem, QuotaItem } from '../../types/models'
import { QuotaType } from '../../utils/config'
import { normalizePaged, mergePaged, hasMorePaged } from '../../utils/paged'
import { setTabBarSelected } from '../../utils/tabbar'
import { logger } from '../../utils/logger'

// 日志模块名
const LOG = 'wardrobe'

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' },
]

Page({
  data: {
    categories: CATEGORIES,
    activeCategory: 0,
    list: [] as ClothesItem[],
    total: 0,
    uploadRemain: 0,
    loading: true,
    refreshing: false,
    loadingMore: false, // 上拉加载独立闸门，避免与首次 loading 互相干扰
    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
    }
    this.refresh()
  },

  syncTabBar() {
    setTabBarSelected(0)
  },

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

  onRefresh() {
    this.setData({ refreshing: true })
    Promise.all([this.fetchList(1), this.fetchQuota()]).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 cat = CATEGORIES[this.data.activeCategory].value
    const params: Record<string, any> = { page, page_size: this.data.pageSize }
    if (cat) params.category_main = cat

    // 请求序号：快速切分类/下拉刷新时旧响应可能后到，序号不匹配的响应直接丢弃
    const seq = ((this as any).reqSeq || 0) + 1
    ;(this as any).reqSeq = seq
    if (page > 1) this.setData({ loadingMore: true })

    return request<PagedResult<ClothesItem>>({ url: '/clothes', data: params })
      .then((res) => {
        if ((this as any).reqSeq !== seq) return
        const { list: raw, total } = normalizePaged<ClothesItem>(res)
        logger.debug(LOG, '列表加载成功, 分类=', cat || '全部', 'page=', page, '条数=', raw && raw.length)
        const list = raw.map((it) => ({
          ...it,
          _statusText: !it.category_main && !it.processed_image ? 'AI 处理中' : '',
          _statusType: 'blue',
        }))
        const merged = mergePaged(this.data.list, list, page === 1)
        this.setData({
          list: merged,
          total,
          hasMore: hasMorePaged(merged, total, this.data.pageSize),
          loading: false,
          loadingMore: false,
          page,
        })
      })
      .catch((e: any) => {
        if ((this as any).reqSeq !== seq) return
        logger.warn(LOG, '列表加载失败, page=', page, 'code=', e && e.code)
        this.setData({ loading: false, loadingMore: false })
      })
  },

  fetchQuota(): Promise<void> {
    return request<{ quotas: QuotaItem[] }>({ url: '/quota/info', showError: false, silentAuth: true })
      .then((res) => {
        const upload = res.quotas.find((q) => q.quota_type === QuotaType.UPLOAD)
        if (upload) this.setData({ uploadRemain: upload.remain })
        logger.debug(LOG, '额度加载成功, 上传剩余=', upload ? upload.remain : 0)
      })
      .catch((e: any) => logger.warn(LOG, '额度加载失败（静默降级）, code=', e && e.code))
  },

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

  onClothesTap(e: WechatMiniprogram.CustomEvent) {
    const item = e.detail.item as ClothesItem
    logger.debug(LOG, '点击衣物, uuid=', item && item.clothes_uuid)
    wx.navigateTo({
      url: `/pages/clothes-detail/clothes-detail?uuid=${item.clothes_uuid}`,
      fail: (err) => logger.warn(LOG, 'navigateTo 衣物详情失败, err=', err && err.errMsg),
    })
  },

  onUpload() {
    wx.navigateTo({
      url: '/pages/upload/upload',
      fail: (e) => logger.warn(LOG, 'navigateTo 上传页失败, err=', e && e.errMsg),
    })
  },
})