import {Injectable} from '@angular/core';
import {HttpEvent, HttpHandler, HttpInterceptor, HttpRequest, HttpResponse} from '@angular/common/http';
import {Observable, of} from 'rxjs';
// @ts-ignore
import * as dataCards from '../assets/data-cards.mock.json';
import {finalize, map} from 'rxjs/operators';
import {JsonTransformerUtil} from './json-transformer.util';
// @ts-ignore
import * as userContext from '../assets/user-context.mock.json';
import {ActiveRequests} from '../app/services/active-requests.service';


const urls = [
  {
    url: 'http://mock/api/maternity/data-card',
    json: dataCards
  },
  {
    url: 'http://mock/api/usercontext',
    json: userContext
  }
];

@Injectable()
export class HttpMockRequestInterceptor implements HttpInterceptor {
  constructor(private activeRequests: ActiveRequests) {}

  intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
    this.activeRequests._registerBlockingRequest();
    for (const element of urls) {
      if (request.url === element.url) {
        console.log('Loaded from json : ' + request.url);
        this.activeRequests._unregisterBlockingRequest();
        return of(new HttpResponse({ status: 200, body: ((element.json) as any).default }));
      }
    }
    console.log('Intercepted httpCall: ' + request.url);
    return next.handle(request).pipe(
      map((event: HttpEvent<any>) => {
        if (event instanceof HttpResponse) {
          const replaced = JsonTransformerUtil.transformDates(event.body);
          return event.clone({body: replaced});
        }
        return event;
      }),
      finalize(() => this.activeRequests._unregisterBlockingRequest())
    );
  }
}