import { Injectable } from '@angular/core';
import {HttpClient, HttpRequest} from '@angular/common/http';
import {Observable} from 'rxjs';
import * as moment from 'moment';
import { Moment } from 'moment';
import {LoggingService} from '@app/_services/logging.service';

@Injectable({
  providedIn: 'root'
})
export class HttpWrapperService {

  constructor(
    private http: HttpClient,
    private loggingService: LoggingService,
  ) { }

  get(url: string, options?: any): Observable<Response> {
    return this.request('GET', url, null, options);
  }

  post(url: string, body: any, options?: any): Observable<Response> {
    return this.request('POST', url, body, options);
  }

  put(url: string, body: any, options?: any): Observable<Response> {
    return this.request('PUT', url, body, options);
  }

  delete(url: string, options?: any): Observable<Response> {
    return this.request('DELETE', url, null, options);
  }

  private logTime(startMoment: Moment, url: string, method: string): void {
    const requestDuration = moment().diff(startMoment, 'milliseconds');
    this.loggingService.sendInfoLevelMessage(`HTTP ${method}, URL: ${url}, Duration: ${requestDuration} ms`);
  }

  private request(method: string, url: string, body?: any, options?: any): Observable<any> {
    this.loggingService.sendInfoLevelMessage(`Options: ${options}`);
    return Observable.create((observer: any) => {
      const requestBeginTime = moment();
      this.http.request(new HttpRequest(method, url, body, options)).subscribe((response) => {
        this.loggingService.sendInfoLevelMessage(response);
        this.logTime(requestBeginTime, `${url}`, method);
        observer.next(response);
        observer.complete();
      }, (error) => {
        switch (error.status) {
          case 403:
            observer.complete();
            break;
          default:
            observer.error(error);
            break;
        }
      });
    });
  }
}