import { Injectable } from '@angular/core';
import { Router, CanActivate, ActivatedRouteSnapshot, RouterStateSnapshot, } from '@angular/router';
import { Observable } from 'rxjs';
  // for debugging
import { OktaAuthService } from '@okta/okta-angular';
import { environment } from './../../environments/environment';

import Utils from './utils';
import { SharedService } from './shared.service';
import { UserService } from '../services/user.service';

@Injectable({providedIn:'root'})
export class AuthGuardSerivce implements CanActivate {
    private COMPONENT_NAME: string = 'AuthGuardSerivce';
    constructor(public router: Router, 
        public oktaAuth: OktaAuthService,
        public sharedService: SharedService, 
        public userService: UserService) {
    }

    canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<boolean> | Promise<boolean> | boolean {
        const METHOD_NAME: string = 'canActivate()';
//        console.log("this.router.url>>>>"+ this.router.url);
        let isAuthenticated: boolean = true;
        if (!this.userService.getUser()) {
            isAuthenticated = false;
            this.sharedService.setAppDefault();
            this.sharedService.clearSessionStorage(true);
            this.sharedService.clearLocalStorage();
            //this.router.navigate(['login']);
            this.redirectLoginPage();//redirecting to login page
        }
        return isAuthenticated;
    }

    async redirectLoginPage(): Promise<any> {
        if(environment.oktaEnable) { 
            await this.oktaAuth.logout();
            this.oktaAuth.loginRedirect('/login')
        }else{                
            this.router.navigate(['login']);
        }
    }
}