import IRequest from '../interfaces/IRequest';
import * as Promise from 'bluebird';
import { CoError } from '../co-error';

export default class ServiceRequest implements IRequest {

  constructor(private request: IRequest, private name: string = '', private url: string = '') {}

  public get(url: string, data?: any): Promise<any> {
    return this.getData(this.request.get(url, data));
  }
  public post(url: string, data?: any): Promise<any> {
    return this.getData(this.request.post(url, data));
  }
  public put(url: string, data?: any): Promise<any> {
    return this.getData(this.request.put(url, data));
  }
  public patch(url: string, data?: any): Promise<any> {
    return this.getData(this.request.patch(url, data));
  }
  public delete(url: string, data?: any): Promise<any> {
    return this.getData(this.request.delete(url, data));
  }
  public download(url: string, fileName: string, data?: any): Promise<void> {
    return this.request.download(url, fileName, data).catch(this.handleError.bind(this));
  }

  private getData(request: Promise<any>): Promise<any> {
    return request.bind(this)
      .get('data')
      .catch(this.handleError);
  }

  private handleError(err: CoError): never {
    if (err.code === 'SERVER_ERROR' || err.code === 'SERVER_UNAVAILABLE') {
      throw new CoError('SERVICE_UNAVAILABLE', this.name, this.url);
    }

    if (err.code === 'NOT_FOUND' || err.code === 'METHOD_NOT_ALLOWED') {
      throw new CoError('SERVICE_NOT_FOUND', this.name, this.url);
    }

    throw err;
  }
}