import { Injectable, Inject } from '@angular/core';
import { BaseService } from '@common/base/base.service';
import { BehaviorSubject, Observable, interval } from 'rxjs';
import { ConfigurationService } from '@app/core/services/configuration/configuration.service';
import { isNullOrUndefined } from 'util';
import { takeUntil } from 'rxjs/operators';

@Injectable()
export class Oauth2DialogService extends BaseService{

	private code: BehaviorSubject<string> = new BehaviorSubject(undefined);

	constructor(private configurationService: ConfigurationService) {
		super();
	}

	public registerCode(code: string) {
		this.code.next(code);
	}

	public login(url: string): Observable<string> {
		const windows = window.open(this.configurationService.app + 'oauth2?url=' + encodeURIComponent(url) ,'', 'height=500px,width=500px');
		const sub = interval(300).pipe(takeUntil(this._destroyed)).subscribe(() => {
			if (windows.closed) {
				const oauthCode = localStorage.getItem('oauthCode');
				localStorage.removeItem('oauthCode');
				this.code.next(oauthCode);
				sub.unsubscribe();
			}
		});
		return this.code.asObservable();
	}

}