import { request } from '../../utils/request'
import { PagedResult, OrderItem } from '../../types/models'
import { fenToYuan, formatDateTime, formatCountdown } from '../../utils/format'
import { normalizePaged, mergePaged, hasMorePaged } from '../../utils/paged'
import { logger } from '../../utils/logger'

// 日志模块名
const LOG = 'order'

const STATUS_FILTERS = [
  { name: '全部', value: 0 },
  { name: '待支付', value: 1 },
  { name: '已支付', value: 2 },
  { name: '已取消', value: 3 },
  { name: '已过期', value: 4 },
  { name: '已退款', value: 5 },
]

const STATUS_TEXT: Record<number, string> = { 1: '待支付', 2: '已支付', 3: '已取消', 4: '已过期', 5: '已退款' }
const STATUS_TYPE: Record<number, string> = { 1: 'orange', 2: 'green', 3: 'gray', 4: 'gray', 5: 'blue' }

Page({
  data: {
    filters: STATUS_FILTERS,
    activeFilter: 0,
    list: [] as OrderItem[],
    loading: true,
    loadingMore: false,
    page: 1,
    pageSize: 20,
    hasMore: true,
  },

  onShow() {
    this.refresh()
    this.startCountdown()
  },

  onHide() {
    this.stopCountdown()
  },

  onUnload() {
    this.stopCountdown()
  },

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

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

  // 待支付倒计时需要每秒走动，仅在有倒计时项时才 setData
  startCountdown() {
    this.stopCountdown()
    ;(this as any).tickTimer = setInterval(() => this.tickCountdown(), 1000)
  },

  stopCountdown() {
    const timer = (this as any).tickTimer
    if (timer) {
      clearInterval(timer)
      ;(this as any).tickTimer = null
    }
  },

  tickCountdown() {
    const list = this.data.list
    if (!list.length) return
    const now = Math.floor(Date.now() / 1000)
    let changed = false
    const next = list.map((it: any) => {
      if (it.order_status !== 1 || !it.expire_time) return it
      const left = it.expire_time - now
      const text = left > 0 ? formatCountdown(left) : ''
      if (text === it._countdown) return it
      changed = true
      return { ...it, _countdown: text }
    })
    if (changed) this.setData({ list: next })
  },

  fetchList(page: number) {
    const params: Record<string, any> = { page, page_size: this.data.pageSize }
    const filter = this.data.activeFilter
    if (filter > 0) params.status = filter

    // 请求序号：切换筛选时旧响应可能后到，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<OrderItem>>({ url: '/order', data: params })
      .then((res) => {
        if ((this as any).reqSeq !== seq) return
        const { list: raw, total } = normalizePaged<OrderItem>(res)
        logger.debug(LOG, '订单加载成功, 筛选=', filter, 'page=', page, '条数=', raw && raw.length)
        const now = Math.floor(Date.now() / 1000)
        const list = raw.map((it) => ({
          ...it,
          _statusText: STATUS_TEXT[it.order_status] || '',
          _statusType: STATUS_TYPE[it.order_status] || 'gray',
          _amount: fenToYuan(it.pay_amount),
          _time: formatDateTime(it.created_at),
          _orderTail: `…${it.order_no.slice(-4)}`,
          _countdown: it.order_status === 1 && it.expire_time > now ? formatCountdown(it.expire_time - now) : '',
          _benefit: it.member_days > 0 ? `${it.member_days} 天会员` : '',
          _canCancel: it.order_status === 1 && it.pay_channel !== 2,
          _payChannelText: it.pay_channel === 2 ? '虚拟支付' : '',
        }))
        const merged = mergePaged(this.data.list, list, 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, '订单加载失败, page=', page, 'code=', e && e.code)
        this.setData({ loading: false, loadingMore: false })
      })
  },

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

  onCancel(e: WechatMiniprogram.TouchEvent) {
    const orderNo = e.currentTarget.dataset.no as string
    wx.showModal({
      title: '取消订单',
      content: '确认取消该订单？',
      success: (res) => {
        if (!res.confirm) return
        request({ url: `/order/${orderNo}/cancel`, method: 'POST' })
          .then(() => {
            logger.info(LOG, '取消订单成功, orderNo=', orderNo)
            wx.showToast({ title: '已取消', icon: 'success' })
            this.refresh()
          })
          .catch((e: any) => logger.warn(LOG, '取消订单失败, orderNo=', orderNo, 'code=', e && e.code))
      },
      fail: (e) => logger.warn(LOG, '取消订单弹窗失败, err=', e && e.errMsg),
    })
  },

  onPay() {
    wx.showToast({ title: '请返回商城重新下单支付', icon: 'none' })
  },

  onRefund(e: WechatMiniprogram.TouchEvent) {
    const orderNo = e.currentTarget.dataset.no as string
    wx.showModal({
      title: '申请退款',
      editable: true,
      placeholderText: '请填写退款原因',
      success: (res) => {
        if (!res.confirm) return
        const reason = (res.content || '').trim()
        if (!reason) {
          wx.showToast({ title: '请填写退款原因', icon: 'none' })
          return
        }
        request({ url: '/order/refund', method: 'POST', data: { order_no: orderNo, reason } })
          .then(() => {
            logger.info(LOG, '退款申请提交成功, orderNo=', orderNo)
            wx.showToast({ title: '退款申请已提交，等待审核', icon: 'none' })
            this.refresh()
          })
          .catch((e: any) => logger.warn(LOG, '退款申请失败, orderNo=', orderNo, 'code=', e && e.code))
      },
      fail: (e) => logger.warn(LOG, '退款弹窗失败, err=', e && e.errMsg),
    })
  },

  onGoMall() {
    wx.navigateTo({
      url: '/pages/mall/mall',
      fail: (e) => logger.warn(LOG, 'navigateTo 商城失败, err=', e && e.errMsg),
    })
  },
})