namespace app\controllers;

use app\models\LoginForm;

class AuthController extends \yii\web\Controller
{
    public function behaviors()
    {
        return [
            /** 
             * Checks oauth2 credentions and try to perform OAuth2 authorization on logged user.
             * AuthorizeFilter uses session to store incoming oauth2 request, so 
             * you can do additional steps, such as third party oauth authorization (Facebook, Google ...)  
             */
            'oauth2Auth' => [
                'class' => \conquer\oauth2\AuthorizeFilter::className(),
                'only' => ['index'],
            ],
        ];
    }
    public function actions()
    {
        return [
            /**
             * Returns an access token.
             */
            'token' => [
                'class' => \conquer\oauth2\TokenAction::classname(),
            ],
            /**
             * OPTIONAL
             * Third party oauth providers also can be used.
             */
            'back' => [
                'class' => \yii\authclient\AuthAction::className(),
                'successCallback' => [$this, 'successCallback'],
            ],
        ];
    }
    /**
     * Display login form, signup or something else.
     * AuthClients such as Google also may be used
     */
    public function actionIndex()
    {
        $model = new LoginForm();
        if ($model->load(\Yii::$app->request->post()) && $model->login()) {
            return $this->goBack();
        } else {
            return $this->render('index', [
                'model' => $model,
            ]);
        }
    }
    /**
     * OPTIONAL
     * Third party oauth callback sample
     * @param OAuth2 $client
     */
    public function successCallback($client)
    {
        switch ($client::className()) {
            case GoogleOAuth::className():
                // Do login with automatic signup                
                break;
            ...
            default:
                break;
        }
        /**
         * If user is logged on, redirects to oauth client with success,
         * or redirects error with Access Denied
         */
        $this->finishAuthorization();
    }
    
}

class ApiController extends \yii\web\Controller
{
    public function behaviors()
    {
        return [
            /** 
             * Performs authorization by token
             */
            'tokenAuth' => [
                'class' => \conquer\oauth2\TokenAuth::className(),
            ],
        ];
    }
    public function beforeAction($action)
    {
        $this->enableCsrfValidation = false;
        \Yii::$app->response->format = Response::FORMAT_JSON;
        return parent::beforeAction($action);
    }
    /**
     * Returns username and email
     */
    public function actionIndex()
    {
        $user = \Yii::$app->user->identity;
        return [
            'username' => $user->username,
            'email' =>  $user->email,
        ];
    }
}

return [
...
   'components' => [
       'authClientCollection' => [
            'class' => 'yii\authclient\Collection',
            'clients' => [
                'myserver' => [
                    'class' => 'yii\authclient\OAuth2',
                    'clientId' => 'unique client_id',
                    'clientSecret' => 'client_secret',
                    'tokenUrl' => 'http://myserver.local/auth/token',
                    'authUrl' => 'http://myserver.local/auth/index',
                    'apiBaseUrl' => 'http://myserver.local/api',
                ],
            ],
        ],
];