import { request, redirectToLogin } from '../../utils/request'
import * as auth from '../../utils/auth'
import { PagedResult, OutfitItem, CommunityOutfitItem } from '../../types/models'
import { OutfitSource, IsPublic, STORAGE_KEYS } from '../../utils/config'
import { normalizePaged, mergePaged, hasMorePaged } from '../../utils/paged'
import { setTabBarSelected } from '../../utils/tabbar'
import { formatRelativeTime } from '../../utils/format'
import { navScroll } from '../../utils/nav'
import { logger } from '../../utils/logger'

// 日志模块名
const LOG = 'outfit'

// 拼图封面单元：无图时前端渲染线稿占位
type CoverCell = { k: string; img: string }

// 列表行：我的穿搭/已收藏来自 OutfitItem；社区来自 CommunityOutfitItem（额外带作者与互动计数）。
// 统一为交叉类型，模板按 activeTab 条件渲染差异字段。
type OutfitRow = OutfitItem & Partial<CommunityOutfitItem> & {
  _likeCount?: number
  _collectCount?: number
  // cls 为胶囊类名（零彩色：pill--ink / pill--line / 空）
  _status?: { text: string; cls: string }
  _time?: string
  _covers?: CoverCell[]
  _collageCls?: string
  _moreCount?: number
}

Page({
  data: {
    activeTab: 0,
    list: [] as OutfitRow[],
    loading: true,
    refreshing: false,
    loadingMore: false,
    page: 1,
    pageSize: 20,
    hasMore: true,
    // 滚动收缩：由 utils/nav.ts 的共享 handler 驱动
    navScrolled: false,
  },

  // scroll-view 滚动 → 导航收缩为玻璃小标题
  onNavScroll: navScroll,

  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) {
      logger.debug(LOG, '命中打开收藏夹标记，切换到收藏 tab')
      wx.removeStorageSync(STORAGE_KEYS.OPEN_COLLECT)
      if (this.data.activeTab !== 1) {
        this.setData({ activeTab: 1, list: [], loading: true })
      }
    }
    // 首帧渲染未结束就 setData 会触发「Expected updated data but get first rendering data」，
    // 整个 webview 渲染失败，用户视觉上仍看到上一个页面。首次 onShow 的刷新延迟到下一帧
    if (!(this as any).firstShown) {
      ;(this as any).firstShown = true
      wx.nextTick(() => this.refresh())
      return
    }
    this.refresh()
  },

  syncTabBar() {
    setTabBarSelected(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 tab = this.data.activeTab
    const url = tab === 1 ? '/collect' : tab === 2 ? '/outfit/community' : '/outfit'

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

    return request<PagedResult<OutfitRow>>({ url, data: { page, page_size: this.data.pageSize } })
      .then(async (res) => {
        const { list: raw, total } = normalizePaged<OutfitRow>(res)
        logger.debug(LOG, '列表加载成功, url=', url, 'page=', page, '条数=', raw && raw.length)
        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((e: any) => {
        if ((this as any).reqSeq !== seq) return
        logger.warn(LOG, '列表加载失败, url=', url, 'page=', page, 'code=', e && e.code)
        this.setData({ loading: false, loadingMore: false })
      })
  },

  decorateList(list: OutfitRow[]): Promise<OutfitRow[]> {
    // 社区分段：作者与互动计数由后端一次性下发，本地仅补相对时间，避免逐条请求点赞接口
    if (this.data.activeTab === 2) {
      return Promise.resolve(
        list.map((it) => ({
          ...it,
          _likeCount: it.like_count || 0,
          _collectCount: it.collect_count || 0,
          _time: formatRelativeTime(it.created_at),
        })),
      )
    }
    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: any) {
          logger.warn(LOG, '点赞数拉取失败, uuid=', it.outfit_uuid, 'code=', e && e.code)
        }
        return { ...it, ...this.decorateCover(it), _likeCount: likeCount, _status: this.getStatusText(it) }
      })
    )
  },

  // 无缝拼图封面：取前 4 件，超出用 +N 角标；不足 1 件时补一个线稿占位格
  decorateCover(it: OutfitItem): { _covers: CoverCell[]; _collageCls: string; _moreCount: number } {
    const items = it.items || []
    const covers: CoverCell[] = items.slice(0, 4).map((c) => ({
      k: c.clothes_uuid,
      img: c.processed_image || '',
    }))
    if (!covers.length) covers.push({ k: 'empty', img: '' })
    return {
      _covers: covers,
      _collageCls: `collage--${covers.length}`,
      _moreCount: Math.max(items.length - 4, 0),
    }
  },

  // 零彩色状态语义：AI 来源 = 黑底白字，已公开 = 描边，仅自己可见 = 浅灰
  getStatusText(it: OutfitItem): { text: string; cls: string } {
    if (it.source === OutfitSource.AI) return { text: 'AI 推荐', cls: 'pill--ink' }
    if (it.is_public === IsPublic.PUBLIC) return { text: '已公开', cls: 'pill--line' }
    return { text: '仅自己可见', cls: '' }
  },

  onCreate() {
    wx.navigateTo({
      url: '/pages/outfit-edit/outfit-edit',
      fail: (e) => logger.warn(LOG, 'navigateTo 新建穿搭失败, err=', e && e.errMsg),
    })
  },

  onAiRecommend() {
    wx.navigateTo({
      url: '/pages/ai-recommend/ai-recommend',
      fail: (e) => logger.warn(LOG, 'navigateTo AI 推荐失败, err=', e && e.errMsg),
    })
  },

  onOutfitTap(e: WechatMiniprogram.TouchEvent) {
    const uuid = e.currentTarget.dataset.uuid as string
    const owner = this.data.activeTab === 0 ? '1' : '0'
    logger.debug(LOG, '点击穿搭, uuid=', uuid, 'owner=', owner)
    wx.navigateTo({
      url: `/pages/outfit-detail/outfit-detail?uuid=${uuid}&owner=${owner}`,
      fail: (err) => logger.warn(LOG, 'navigateTo 穿搭详情失败, err=', err && err.errMsg),
    })
  },
})