import { Body, Controller, Param, Post, Req, Res } from '@nestjs/common';
import type { Request, Response } from 'express';
import { DeliveryCallbackService } from './delivery-callback.service';

type CourierCallbackRequest = Request & { rawBody?: Buffer };

@Controller('callbacks')
export class DeliveryCallbackController {
  constructor(private readonly deliveryCallbackService: DeliveryCallbackService) {}

  /** 小飞侠/物流路由变化回调（适配器入口） */
  @Post('courier/:provider/track')
  async trackByProvider(
    @Param('provider') provider: string,
    @Body() body: unknown,
    @Req() req: CourierCallbackRequest,
    @Res() res: Response,
  ) {
    const result = await this.deliveryCallbackService.handleTrackCallback(
      provider,
      body,
      `/api/v1/callbacks/courier/${provider}/track`,
      this.buildRequestMeta(req),
    );
    // 直出承运商约定结构，避免被全局 { code:0, data } 包装
    return res.status(200).json(result);
  }

  /** 兼容旧路径，默认按小飞侠解析 */
  @Post('delivery/track')
  async trackLegacy(
    @Body() body: unknown,
    @Req() req: CourierCallbackRequest,
    @Res() res: Response,
  ) {
    const result = await this.deliveryCallbackService.handleTrackCallback(
      'xfx',
      body,
      '/api/v1/callbacks/delivery/track',
      this.buildRequestMeta(req),
    );
    return res.status(200).json(result);
  }

  private buildRequestMeta(req: CourierCallbackRequest) {
    const contentType = req.headers['content-type'];
    return {
      contentType: Array.isArray(contentType) ? contentType.join(', ') : contentType || null,
      rawBody: req.rawBody?.toString('utf8') ?? null,
      query:
        req.query && typeof req.query === 'object'
          ? (req.query as Record<string, unknown>)
          : undefined,
    };
  }
}