/*
 * @author gs
 * @date 2020/07/27 15:40
 */

import {
  ArgumentsHost,
  Catch,
  ExceptionFilter,
  HttpException,
  HttpStatus,
  Logger
} from '@nestjs/common';
import { TowifyError } from '../../base/error';

/**
 * Implementation of the ExceptionFilter. This filter works when an error been handled.
 * @see [Exception Filters](https://docs.nestjs.com/exception-filters)
 */
@Catch()
export class AllExceptionsFilter implements ExceptionFilter {
  catch(exception: Error, host: ArgumentsHost) {
    const ctx = host.switchToHttp();
    const response = ctx.getResponse();
    const request = ctx.getRequest();
    Logger.error(exception.stack);
    let status =
      exception instanceof HttpException
        ? exception.getStatus()
        : HttpStatus.INTERNAL_SERVER_ERROR;
    if (exception instanceof TowifyError) {
      status = HttpStatus.OK;
    }
    const code = exception instanceof TowifyError ? exception.code : status;
    const { url } = request;
    const errorResponse = {
      code,
      timestamp: new Date().toISOString(),
      path: url,
      message: exception.message
    };
    Logger.error(errorResponse);
    response.status(status).json(errorResponse);
  }
}