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 { prisma } from '../utils/prisma.js'
import { withErrorBoundary } from '../utils/handler.js'

type OrderCancelSubRequest = {
  supplierId?: string
  token?: string
  userId?: string
  orderId?: string
  mainOrderId?: string
}

type BridgeOrderResponse = {
  resultCode?: number
  message?: 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<OrderCancelSubRequest>(request)
  const supplierId = String(body.supplierId || '').trim()
  const token = String(body.token || '').trim()
  const userId = String(body.userId || '').trim()
  const orderId = String(body.orderId || '').trim()

  if (!supplierId || !token || !userId || !orderId) {
    return fail('供应商、用户、授权或子单信息不能为空')
  }

  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 subOrder = await prisma.supplierOrderSub.findFirst({
    where: {
      orderId,
      supplierId,
      userId,
      deleted: 0
    }
  })

  if (!subOrder) {
    return fail('子单不存在或已取消', 404, 'SUB_ORDER_NOT_FOUND')
  }

  const mainOrderId = String(body.mainOrderId || subOrder.mainOrderId).trim()

  const bridgeResponse = await fetch(`${apiBase}/pointOrder/pushOrderInfoMsg`, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      token
    },
    body: JSON.stringify({
      supplierId,
      orderType: 3,
      orderId,
      mainOrderId,
      userId,
      time: Date.now(),
      token
    })
  })

  const bridgePayload = (await bridgeResponse.json().catch(() => ({}))) as BridgeOrderResponse

  if (!bridgeResponse.ok || bridgePayload.resultCode !== 0) {
    return fail(bridgePayload.message || '取消子单推送失败', 502, 'BRIDGE_CANCEL_SUB_FAILED')
  }

  await prisma.$transaction(async tx => {
    await tx.supplierOrderSub.update({
      where: { orderId },
      data: {
        deleted: 1,
        updateTime: new Date()
      }
    })

    await tx.supplierOrderProduct.updateMany({
      where: {
        subOrderId: orderId,
        deleted: 0
      },
      data: {
        deleted: 1
      }
    })
  })

  return ok({
    supplierId,
    orderType: 3,
    orderId,
    mainOrderId,
    userId
  })
})