const { request, ensureLogin, cents } = require('../../utils/api.js')

Page({
  data: {
    loading: false,
    errorMessage: '',
    coupons: [],
    packages: [],
  },

  onLoad() {
    this.loadBenefits()
  },

  async loadBenefits() {
    this.setData({ loading: true, errorMessage: '' })
    try {
      await ensureLogin()
      const response = await request('/profile/benefits')
      this.setData({
        coupons: (response.data.coupons || []).map(formatCoupon),
        packages: (response.data.packages || []).map(formatPackage),
      })
    } catch (error) {
      this.setData({ errorMessage: error.message || '权益明细加载失败' })
    } finally {
      this.setData({ loading: false })
    }
  },
})

function formatCoupon(item) {
  const isTime = item.couponType === 'TIME'
  return {
    ...item,
    statusText: benefitStatus(item.status),
    valueText: isTime ? `${item.timeMinutes || 0}分钟` : cents(item.discountAmountCents),
    thresholdText: Number(item.minOrderAmountCents || 0) > 0
      ? `满${cents(item.minOrderAmountCents)}可用`
      : '无门槛',
    validText: `${formatDate(item.validFrom)} 至 ${formatDate(item.validTo)}`,
    scopeText: scopeText(item),
  }
}

function formatPackage(item) {
  return {
    ...item,
    statusText: benefitStatus(item.status),
    priceText: cents(item.priceCents),
    remainingAmountText: cents(item.remainingAmountCents),
    totalAmountText: cents(item.amountCentsTotal),
    validText: `${formatDate(item.validFrom)} 至 ${formatDate(item.validTo)}`,
    scopeText: scopeText(item),
  }
}

function benefitStatus(status) {
  return ({
    AVAILABLE: '可用',
    ACTIVE: '可用',
    FROZEN: '锁定中',
    USED: '已使用',
    EXHAUSTED: '已用尽',
    EXPIRED: '已过期',
  })[status] || status
}

function scopeText(item) {
  if (item.roomId) return `指定房间 ${item.roomId}`
  if (item.roomCategoryId) return `指定房型 ${item.roomCategoryId}`
  if (item.storeId) return `指定门店 ${item.storeId}`
  return item.holidayOnly ? '节假日可用' : '全部门店可用'
}

function formatDate(value) {
  const date = new Date(value)
  const pad = (input) => String(input).padStart(2, '0')
  return `${date.getFullYear()}-${pad(date.getMonth() + 1)}-${pad(date.getDate())}`
}