import { Injectable } from '@angular/core';
import {
  CanActivate, Router, CanLoad, Route, CanActivateChild ,
  ActivatedRouteSnapshot,
  RouterStateSnapshot
} from '@angular/router';

import { Store } from '@ngrx/store';
import { OAuthService } from 'angular-oauth2-oidc';


import * as appCommonReducer from '../reducers/app-common.reducer'
import * as appCommonActions from '../actions/app-common.actions';


@Injectable({
  providedIn: 'root',
})
export class AuthGuard implements CanActivate, CanLoad, CanActivateChild  { 
 
  private loginDispatched = false;
  private initialized = false;
  constructor(private oauthService: OAuthService, private router: Router, private store: Store<appCommonReducer.State> ) { }

  canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): boolean {
    let url: string = state.url;

    return this.checkLogin(url);
  }

  canActivateChild(childRoute: ActivatedRouteSnapshot, state: RouterStateSnapshot): boolean {
    let url: string = state.url;

    return this.checkLogin(url);
  }

  canLoad(route: Route): boolean {
    return this.checkLogin(route.path);
  }

  checkLogin(url: string): boolean {
    if (!this.oauthService.hasValidAccessToken()) {
      this.oauthService.responseType
      if(this.oauthService.responseType == "code")
        if(this.oauthService.getRefreshToken() != null ) {
          this.oauthService.refreshToken().then(() => {
            this.store.dispatch(new appCommonActions.InitUser());
            return true;
          }).catch(() => {
            this.oauthService.initCodeFlow(url);
            return false;
          }                
          )
        } else {
          this.oauthService.initCodeFlow(url);
          return false;
        }              
      else 
        this.oauthService.initImplicitFlow(url);
        return false;
    } else {
      this.store.dispatch(new appCommonActions.InitUser());
      return true;
    }
  }
}