import { ErrorMessages } from '../constants';
import type {
  SuccessResponse,
  ErrorResponse,
  NetworkResponse,
} from '../types';

export default function responseHandler<R>(
  status: number,
  response?: R | string,
): Promise<NetworkResponse<R>> {
  return new Promise((resolve) => {
    if (status >= 200 && status < 300) {
      const castResp = response as R;
      const successResponse: SuccessResponse<R> = {
        ok: true,
        status,
        response: castResp,
      };
      resolve(successResponse);
    // Usually a 422 from Flow API with validation errors
    } if (response) {
      const errorResp: ErrorResponse = {
        ok: false,
        status,
        error: response,
      };
      resolve(errorResp);
    // Handle case where response is an error and body is empty
    }
    resolve({
      ok: false,
      status,
      error: {
        messages: [ErrorMessages.NETWORK_ERROR],
      },
    });
  });
}