import { Injectable } from '@angular/core';
import { 
        CanActivate,
        CanActivateChild,
        Router,
        ActivatedRouteSnapshot,
        RouterStateSnapshot } from '@angular/router';
import { AuthService } from '../services';

@Injectable()
export class UnauthGuard implements CanActivate{

    constructor(protected router: Router, protected auth: AuthService){}

    canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): boolean{
        /**
         * if user is logged in,
         * navigate to '/'
         */
        if(this.auth.check()){
            this.router.navigate(['/']);
            return false;
        }
        
        /**
         * if user is not logged in,
         * proceed, typically to a sign in form, 
         */
        return true;
    }
    
    canActivateChild(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): boolean{
        return this.canActivate(route, state);
    }
}