import type { Context } from '@netlify/functions'
import { guardMethod } from '../utils/method.js'
import { fail, ok } from '../utils/http.js'
import { readJson } from '../utils/request.js'
import { withErrorBoundary } from '../utils/handler.js'

type SupplierPointsRequest = {
  supplierId?: string
  token?: string
  userId?: string
}

type BridgePointsResponse = {
  resultCode?: number
  message?: string
  userPoints?: number | string
}

const normalizeBase = (base: string) => base.replace(/\/$/, '')

export default withErrorBoundary(async (request: Request, _context: Context) => {
  const methodResponse = guardMethod(request, ['POST'])
  if (methodResponse) return methodResponse

  const body = await readJson<SupplierPointsRequest>(request)
  const supplierId = String(body.supplierId || '').trim()
  const token = String(body.token || '').trim()
  const userId = String(body.userId || '').trim()

  if (!supplierId || !token || !userId) {
    return fail('供应商、用户或授权信息不能为空')
  }

  const apiBase = normalizeBase(process.env.POINTS_MALL_OPEN_API_BASE || '')

  if (!apiBase) {
    return fail('平台积分商城接口地址未配置', 500, 'OPEN_API_BASE_MISSING')
  }

  const response = await fetch(`${apiBase}/pointOrder/queryPoints`, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      token
    },
    body: JSON.stringify({
      supplierId,
      token,
      userId
    })
  })

  const pointsPayload = (await response.json().catch(() => ({}))) as BridgePointsResponse

  if (!response.ok || pointsPayload.resultCode !== 0) {
    return fail(pointsPayload.message || '查询用户积分失败', 502, 'BRIDGE_POINTS_FAILED')
  }

  return ok({
    userPoints: Number(pointsPayload.userPoints || 0)
  })
})