import { CallHandler, ExecutionContext, Injectable, NestInterceptor, Optional } from '@nestjs/common';
import { Observable, tap } from 'rxjs';
import { ProtocolLogsService } from '../protocol-logs/protocol-logs.service';
import { publicOpenApiFailure } from './open-api.protocol';
import type { OpenApiRequestLike } from './open-api.types';

@Injectable()
export class OpenApiTraceInterceptor implements NestInterceptor {
  constructor(@Optional() private readonly logs?: ProtocolLogsService) {}
  intercept(context: ExecutionContext, next: CallHandler): Observable<unknown> {
    const request = context.switchToHttp().getRequest<OpenApiRequestLike>();
    const startedAt = Date.now();
    const record = (error?: unknown) =>
      this.logs?.record({
        protocol: 'http',
        direction: 'client_to_platform',
        eventType: request.method === 'GET' ? 'query_request' : 'send_request',
        status: error ? 'failed' : 'success',
        requestId: request.openApiRequestId,
        tenantId: request.openApiAuth?.application.tenantId,
        applicationId: request.openApiAuth?.application.id,
        resultCode: error ? publicOpenApiFailure(error).code : 'OK',
        durationMs: Date.now() - startedAt,
        detail: { method: request.method, operation: context.getHandler().name },
      });
    return next.handle().pipe(tap({ next: () => record(), error: (error: unknown) => record(error) }));
  }
}