import { request, uploadFile, NOT_LOGIN_CODE } from '../../utils/request'
import { ProcessStatus } from '../../utils/config'
import { addPendingClothes, removePendingClothes } from '../../utils/pending-clothes'
import { navPageScroll } from '../../utils/nav'
import { logger } from '../../utils/logger'

// 日志模块名
const LOG = 'upload'

// 状态轮询：2s 一次、最多 90 次 ≈ 3 分钟，与后端单任务 3 分钟上限对齐。
// 预算耗尽只停轮询并转中性提示，绝不判定失败：任务可能仍在排队/执行中，
// 由后端恢复调度器兜底，最终结果由衣橱页核对补齐。
const POLL_INTERVAL_MS = 2000
const POLL_MAX_COUNT = 90

Page({
  data: {
    state: 'idle' as 'idle' | 'processing' | 'failed',
    imagePath: '',
    clothesUuid: '',
    failReason: '',
    step: 0,
    // 轮询预算耗尽：仍在处理中，只做中性提示，不算失败
    slowHint: false,
    // 失败原因是否伴随额度退回（仅后端确认失败才为真）
    quotaRefunded: false,
    // 滚动收缩：由 utils/nav.ts 的共享 handler 驱动
    navScrolled: false,
    // v2 玻璃弹层
    srcVisible: false,
    srcItems: [
      { text: '拍照', value: 'camera' },
      { text: '从相册选择', value: 'album' },
    ],
    doneVisible: false,
    doneButtons: [
      { text: '回到衣橱', value: 'back' },
      { text: '继续上传', value: 'again', type: 'main' },
    ],
    quotaVisible: false,
    quotaButtons: [
      { text: '取消', value: '' },
      { text: '去购买', value: 'ok', type: 'main' },
    ],
  },

  // 页面级滚动 → 导航收缩为玻璃小标题
  onPageScroll: navPageScroll,

  onChoose() {
    this.setData({ srcVisible: true })
  },

  onSourceCancel() {
    this.setData({ srcVisible: false })
  },

  onSourceSelect(e: WechatMiniprogram.CustomEvent) {
    const value = e.detail.value as string
    this.setData({ srcVisible: false })
    if (value !== 'camera' && value !== 'album') return
    this.chooseImage([value])
  },

  chooseImage(sourceType: Array<'camera' | 'album'>) {
    wx.chooseMedia({
      count: 1,
      mediaType: ['image'],
      sourceType,
      success: (res) => {
        const file = res.tempFiles[0]
        logger.debug(LOG, '已选择图片, 来源=', sourceType.join(','))
        this.startUpload(file.tempFilePath)
      },
      fail: (e) => logger.warn(LOG, '选择图片失败, err=', e && e.errMsg),
    })
  },

  startUpload(filePath: string) {
    this.setData({
      state: 'processing',
      imagePath: filePath,
      step: 0,
      failReason: '',
      slowHint: false,
      quotaRefunded: false,
    })

    uploadFile<{ clothes_uuid: string; image_process_status: number }>(filePath)
      .then((res) => {
        logger.info(LOG, '衣物上传成功, uuid=', res.clothes_uuid)
        // 登记待核对：即使用户立刻退出小程序，回到衣橱时也会补齐最终处理结果
        addPendingClothes(res.clothes_uuid)
        this.setData({ clothesUuid: res.clothes_uuid })
        this.askNextAction()
      })
      .catch((e: any) => {
        this.setData({ state: 'idle' })
        logger.warn(LOG, '衣物上传失败, code=', e && e.code)
        if (e && e.code === 80000) {
          this.showQuotaModal()
          return
        }
        // uploadFile 已统一 toast 业务错误与网络错误；未登录时请求并未发出，需补一次提示
        if (e && e.code === NOT_LOGIN_CODE) {
          wx.showToast({ title: '请先登录', icon: 'none' })
        }
      })
  },

  askNextAction() {
    // 后台继续轮询，仅用于更新步骤进度（不再自动跳详情）
    this.pollStatus(this.data.clothesUuid)
    // 立即弹窗让用户选择下一步，避免干等
    this.setData({ doneVisible: true })
  },

  onDoneCancel() {
    // 回到衣橱
    this.setData({ doneVisible: false })
    this.clearTimer()
    wx.navigateBack({
      delta: 1,
      fail: (e) => {
        logger.warn(LOG, 'navigateBack 失败，改跳衣橱, err=', e && e.errMsg)
        wx.switchTab({
          url: '/pages/wardrobe/wardrobe',
          fail: (e2) => logger.warn(LOG, 'switchTab 衣橱失败, err=', e2 && e2.errMsg),
        })
      },
    })
  },

  onDoneConfirm(e: WechatMiniprogram.CustomEvent) {
    this.setData({ doneVisible: false })
    this.clearTimer()
    if (e.detail.value === 'again') {
      logger.debug(LOG, '选择继续上传，重置状态')
      this.setData({
        state: 'idle',
        imagePath: '',
        clothesUuid: '',
        step: 0,
        failReason: '',
        slowHint: false,
        quotaRefunded: false,
      })
      return
    }
    this.onDoneCancel()
  },

  pollStatus(uuid: string) {
    // 先清旧定时器：onShow 续接时避免叠加成多份轮询
    this.clearTimer()
    let count = 0
    ;(this as any).pollTimer = setInterval(() => {
      count++
      request<{ image_process_status: number; fail_reason: string }>({
        url: `/clothes/${uuid}/status`,
        showError: false,
        silentAuth: true,
      })
        .then((res) => {
          const status = res.image_process_status
          if (status === ProcessStatus.MATTING) {
            this.setData({ step: 1 })
          } else if (status === ProcessStatus.CLASSIFYING) {
            this.setData({ step: 2 })
          } else if (status === ProcessStatus.SUCCESS) {
            // 处理成功不再自动跳转，由用户自行从衣橱进入详情
            this.clearTimer()
            removePendingClothes(uuid)
          } else if (status === ProcessStatus.FAILED) {
            // 仅后端确认失败才进入失败态：该路径额度已由后端自动退回
            this.clearTimer()
            removePendingClothes(uuid)
            logger.warn(LOG, 'AI 识别失败, 原因=', res.fail_reason)
            this.setData({
              state: 'failed',
              failReason: res.fail_reason || '识别失败',
              quotaRefunded: true,
            })
          }
        })
        .catch((e: any) => logger.warn(LOG, '状态轮询失败, code=', e && e.code))

      if (count >= POLL_MAX_COUNT) {
        // 只停轮询，不判失败：任务可能仍在队列/执行中，由后端兜底、衣橱页核对
        this.clearTimer()
        logger.warn(LOG, '状态轮询预算耗尽，转中性提示, uuid=', uuid)
        this.setData({ slowHint: true })
      }
    }, POLL_INTERVAL_MS)
  },

  clearTimer() {
    const t = (this as any).pollTimer
    if (t) {
      clearInterval(t)
      ;(this as any).pollTimer = null
    }
  },

  // 离开页面只停本地轮询：后端处理不中断，最终结果由衣橱页核对补齐
  onHide() {
    this.clearTimer()
  },

  // 回到前台：仍在处理中则续接轮询，恢复进度展示
  onShow() {
    if (this.data.state === 'processing' && this.data.clothesUuid) {
      logger.debug(LOG, 'onShow 续接状态轮询, uuid=', this.data.clothesUuid)
      this.pollStatus(this.data.clothesUuid)
    }
  },

  onUnload() {
    this.clearTimer()
  },

  showQuotaModal() {
    this.setData({ quotaVisible: true })
  },

  onQuotaCancel() {
    this.setData({ quotaVisible: false })
  },

  onQuotaConfirm(e: WechatMiniprogram.CustomEvent) {
    this.setData({ quotaVisible: false })
    if (e.detail.value !== 'ok') return
    wx.navigateTo({
      url: '/pages/mall/mall',
      fail: (err) => logger.warn(LOG, 'navigateTo 商城失败, err=', err && err.errMsg),
    })
  },

  onRetry() {
    this.setData({
      state: 'idle',
      imagePath: '',
      clothesUuid: '',
      failReason: '',
      step: 0,
      slowHint: false,
      quotaRefunded: false,
    })
  },

  onManualEdit() {
    if (!this.data.clothesUuid) return
    wx.redirectTo({
      url: `/pages/clothes-detail/clothes-detail?uuid=${this.data.clothesUuid}`,
      fail: (e) => logger.warn(LOG, 'redirectTo 衣物详情失败, err=', e && e.errMsg),
    })
  },
})