<?php

namespace backend\forms;

use common\models\AccessToken;
use common\models\Client;
use common\models\User;
use components\Exception;
use Yii;

class AuthForm extends BaseForm
{
	/**
	 * @var
	 */
	public $username;

	/**
	 * @var
	 */
	public $password;

	/**
	 * @var null
	 */
	public $access_token = null;

	/**
	 * @var null
	 */
	private $_user = null;

	/**
	 * @var
	 */
	private $_response;

	/**
	 * 失效时长
	 */
	const EXPIRES = 30 * 86400;


	public function rules()
	{
		return [
			[['username', 'password'], 'required', 'on' => ['access_token']],
			[['username', 'password'], 'trim', 'on' => ['access_token']],
			//['username', 'validateUser', 'on' => 'access_token'],
			['password', 'validatePassword', 'on' => ['access_token']],
		];
	}

	public function validatePassword($attribute)
	{
		if (!$this->hasErrors()) {
			if (!$this->findUser(['username' => $this->username, 'status' => User::STATUS_ACTIVE])
				|| !$this->password
				|| !$this->_user['password']
				|| !Yii::$app->security->validatePassword($this->password, $this->_user['password']))
			{
				$this->addError($attribute, 2001);
			}
		}
	}

	/**
	 * getAccessToken
	 * @author: libingke
	 * @return string
	 */
	public function getAccessToken()
	{
		$this->generateAccessToken();
		return $this->_response;
	}

	public function generateAccessToken()
	{
		$this->access_token = Yii::$app->security->generateRandomString();

		$expires = strtotime(date('Y-m-d 23:59:59')) + static::EXPIRES;
		//insert
		if ( !($one = AccessToken::findOne(['access_token' => $this->access_token])) ) {
			$model = new AccessToken();
			$model->access_token	= $this->access_token;
			$model->user_id 		= $this->_user['uid'];
			$model->ip				= isset(Yii::$app->request->userIP) ? Yii::$app->request->userIP : '';
			$model->user_agent		= isset(Yii::$app->request->userAgent) ? Yii::$app->request->userAgent : '';
			$model->expires			= $expires;
			if (!$model->save(false))
				throw new Exception(2002);
		}

		$this->_response = array(
			"access_token" => $this->access_token,
			"expires" => $expires
		);
	}

	/**
	 * findUser
	 * @author: libingke
	 * @param array $query
	 */
	public function findUser(Array $query = [])
	{
		if (!$this->_user) {
			$user = User::findOne($query);
			if ($user)
				$this->_user = [
					'uid' => $user->id,
					'username' => $user->username,
					'password' => $user->password_hash
				];
		}

		return $this->_user;
	}
}