dukang/server/dukang-api/src/callbacks/wechat-refund.controller.ts

import { Controller, Headers, Post, Req, Res } from '@nestjs/common';
import type { Request, Response } from 'express';
import { PrismaService } from '../common/prisma/prisma.module';
import { AlertService } from '../common/alert/alert.service';

@Controller('callbacks/wechat')
export class WechatRefundCallbackController {
  constructor(
    private readonly prisma: PrismaService,
    private readonly alert: AlertService,
  ) {}

  @Post('refund')
  async refundNotify(
    @Req() req: Request,
    @Headers() _headers: Record<string, string | string[] | undefined>,
    @Res() res: Response,
  ) {
    try {
      const body = typeof req.body === 'object' ? req.body : {};
      const outRefundNo = String((body as Record<string, unknown>).out_refund_no ?? '');
      const refundId = String((body as Record<string, unknown>).refund_id ?? outRefundNo);

      const existing = await this.prisma.logThirdParty.findFirst({
        where: { provider: 'WECHAT_REFUND', externalNo: refundId, status: 'SUCCESS' },
      });
      if (existing) {
        return res.status(200).json({ code: 'SUCCESS', message: '成功' });
      }

      await this.prisma.logThirdParty.create({
        data: {
          provider: 'WECHAT_REFUND',
          scene: 'ORDER_REFUND_CALLBACK',
          refType: 'TICKET',
          refId: BigInt(0),
          externalNo: refundId,
          status: 'SUCCESS',
        },
      });

      return res.status(200).json({ code: 'SUCCESS', message: '成功' });
    } catch (err) {
      const message = err instanceof Error ? err.message : '处理失败';
      this.alert.notify({
        level: 'P0',
        category: 'pay',
        title: '退款回调处理失败',
        detail: message,
        dedupeKey: `refund_callback_fail|${message.slice(0, 40)}`,
        dedupeTtlSec: 120,
      });
      return res.status(500).json({ code: 'FAIL', message });
    }
  }
}