<?php

namespace common\models;

use Yii;
use yii\web\IdentityInterface;
use Firebase\JWT\JWT;
use Kreait\Firebase\Factory;
use Kreait\Firebase\Exception\AuthException;
use Kreait\Firebase\Exception\FirebaseException;


class Usuario implements IdentityInterface {
  
  public $uid;
  public $correo;
  public $nombre;

  protected static function firebase() {
    $params = \Yii::$app->params;

    $firebase = (new Factory())
      ->withServiceAccount($params['firebaseKey'])
      ->createAuth();

    return $firebase;
  }

  /**
   * Finds an identity by the given id.
   *
   * @param string|int $id the id to be looked for
   * @return IdentityInterface|null the identity object that matches the given id.
   */
  public static function findIdentity($uid) {
    $firebase = self::firebase();
    try {
      $fUsuario = $firebase->getUser($uid);
      if ($fUsuario->disabled === true) {
        return null;
      }

      $usuario = new static();
      $usuario->uid = $uid;
      $usuario->nombre = "";
      if($fUsuario->displayName) {
        $usuario->nombre = $fUsuario->displayName;
      }
      $usuario->correo = $fUsuario->email;

      return $usuario;
    } catch (AuthException $e) {
      return null;
    } catch (FirebaseException $e) {
      return null;
    }
  }

  /**
   * Finds an identity by the given token.
   *
   * @param string $token the token to be looked for
   * @return IdentityInterface|null the identity object that matches the given token.
   */
  public static function findIdentityByAccessToken($token, $type = null) {
    $firebase = self::firebase();

    try {
      $verifiedIdToken = $firebase->verifyIdToken($token);
      $uid = $verifiedIdToken->claims()->get('sub');
      $fUsuario = $firebase->getUser($uid);
      if ($fUsuario->disabled === true) {
        return null;
      }

      $usuario = new static();
      $usuario->uid = $uid;
      $usuario->nombre = "";
      if($fUsuario->displayName) {
        $usuario->nombre = $fUsuario->displayName;
      }
      $usuario->correo = $fUsuario->email;

      return $usuario;
    } catch (AuthException $e) {
      return null;
    } catch (FirebaseException $e) {
      return null;
    }
  }

  /**
   * @return int|string current user ID
   */
  public function getId() {
    return $this->uid;
  }

  /**
   * @return string current user auth key
   */
  public function getAuthKey() {
    $key = Yii::$app->params['jwt.key'];
    $token = [
      "id" => $this->id,
      "pass" => $this->clave
    ];

    $jwt = JWT::encode($token, $key);
    return $jwt;
  }

  /**
   * @param string $authKey
   * @return bool if auth key is valid for current user
   */
  public function validateAuthKey($authKey) {
    $key = Yii::$app->params['jwt.key'];
    $jwt = JWT::decode($authKey, $key);
    if(!isset($jwt["id"])) {
      return false;
    }

    return $jwt["id"] == $this->id;
  }

}