import { CanActivate, Router, CanLoad, Route, ActivatedRouteSnapshot, RouterStateSnapshot, CanActivateChild } from '@angular/router';
import { Injectable } from '@angular/core';
import { AuthService } from './auth.service';
import { Observable } from 'rxjs';

@Injectable({
    providedIn: 'root'
})
export class AuthGuard implements CanActivate, CanActivateChild, CanLoad {

    constructor(private authService: AuthService, private router: Router) {

    }

    checkAuth() {
        if ( this.authService.isAuth() ) {
            return true;
        }
        else {
            this.router.navigate(['login']);
        }
    }

    canLoad(route: Route): Observable<boolean>|Promise<boolean>|boolean {
        return this.checkAuth();
    }

    canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot) {
        return this.checkAuth();
    }

    canActivateChild(childRoute: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<boolean> | Promise<boolean> | boolean {
        return this.checkAuth();
    }

}