import {
  CallHandler,
  ExecutionContext,
  Injectable,
  NestInterceptor,
} from '@nestjs/common';
import { Observable } from 'rxjs';
import { map } from 'rxjs/operators';
import { BaseInquiryResponseDto } from '../dto/base-inquiry-response.dto';
import { normalizeInquiryResponse } from '../helpers/inquiry-response.helper';

/**
 * Ensures inquiry endpoints always emit BaseInquiryResponseDto shape.
 */
@Injectable()
export class ResponseTransformInterceptor implements NestInterceptor {
  intercept(_context: ExecutionContext, next: CallHandler): Observable<unknown> {
    return next.handle().pipe(
      map((data: BaseInquiryResponseDto) => normalizeInquiryResponse(data)),
    );
  }
}