<?php
namespace app\modules\admin\models;
use Yii;
use app\common\models\EModel;
use app\models\LoginTimes;
use app\models\IpBanned;
use app\common\helpers\Cookie;
use app\common\helpers\Session;
class AdminLoginForm extends EModel
{
	public  $user_name;
	public  $user_pwd;
    public  $code;
	private $retryTimes;//后台登录允许尝试次数
	private $timeOut=3600;//后台登录错误次数清零时限
    public  $loginResult = array();
	public function init()
	{
		$this->retryTimes = Yii::$app->params['retryTimes'];
	}
	//表单验证规则
	public function rules()
	{
		return array(
            array(['user_name','user_pwd','code'], 'required'),
			array('user_name', 'match','pattern'=>'/^[\x{4e00}-\x{9fa5}_a-zA-Z0-9]{5,36}$/u','message'=>'无效账号或密码'),
            array('code', 'match','pattern'=>'/^[\w\_]{4,6}$/','message'=>'无效验证码'),
			array('user_pwd', 'match','pattern'=>'/^[0-9a-zA-Z_!@#$%^&*?]{6,32}$/','message'=>'无效账号或密码'),
		);
	}

	public function attributeLabels()
	{
		return array(
			'user_name' => Yii::t('attr','admin.user_name'),
			'user_pwd' => Yii::t('attr','admin.user_pwd'),
            'code' => Yii::t('attr','admin.code'),
		);
	}

	//判断是否已经超过尝试次数，超过则中断
	private function _exceededTimes()
	{
		$ip = MYIP;
        $startTime = intval(TIMESTAMP-$this->timeOut);
		$model = LoginTimes::find()->where('user_name=:user_name and ip=:ip and is_admin=1 and login_time>:login_time',array(':user_name'=>$this->user_name,':ip'=>$ip,':login_time'=>$startTime))->limit(1)->one();
		if(!empty($model))
		{
			$times = $model->times;
			if($times>=$this->retryTimes)
			{
				return true;
			}
			else
			{
				return false;
			}
		}
		else
		{
			return false;
		}
		
		
	}
	//登录尝试次数控制
	private function _failedTimes()
	{

        $ip = MYIP;
        $startTime = intval(TIMESTAMP-$this->timeOut);
        $model = LoginTimes::find()->where('user_name=:user_name and ip=:ip and is_admin=1 and login_time>:login_time',array(':user_name'=>$this->user_name,':ip'=>$ip,':login_time'=>$startTime))->limit(1)->one();;
        if(!empty($model))
        {
            $times = $model->times;
            if($times>=$this->retryTimes)
            {
                /*$ipBanned = new IpBanned();
                $ipBanned->ip = MYIP;
                $ipBanned->expires = TIMESTAMP+3600;
                $ipBanned->save();*/
                $timesInfo = '您的登录失败次数达到上限！';
            }
            else
            {
                $times++;
                $model->times=$times;
                $model->login_time = TIMESTAMP;
                $model->save();
                if($times==$this->retryTimes)
                {
                    /*$ipBanned = new IpBanned();
                    $ipBanned->ip = MYIP;
                    $ipBanned->expires = TIMESTAMP+3600;
                    $ipBanned->save();*/
                    $timesInfo = '您的登录失败次数达到上限！';

                }
                else
                {
                    $timesInfo = '您还能尝试登录'.intval($this->retryTimes-$times).'次！';

                }
            }
        }
        else
        {
            //清空超出时限的登录尝试记录
            LoginTimes::deleteAll('user_name=:user_name and is_admin=1',array(':user_name'=>$this->user_name));
            $model = new LoginTimes;
            $model->user_name = $this->user_name;
            $model->ip = $ip;
            $model->login_time = TIMESTAMP;
            $model->is_admin=1;
            $model->times = 1;
            $model->save();
            $timesInfo = '您还能尝试登录'.intval($this->retryTimes-1).'次！';

        }
        return $timesInfo;

	}
	//后台登录
	public function login()
	{

        if(empty($this->code))
        {

            $this->addError('AdminLoginForm','验证码不能为空');
            return false;

        }

        if(strtolower($this->code)!=strtolower(Session::getInitCls()->get(Yii::$app->params['capcha'])))
        {

            $this->addError('AdminLoginForm','验证码不正确');
            return false;

        }
//        if(TIMESTAMP-Yii::$app->session[Yii::$app->params['capchaTime']]>Yii::$app->params['capchaTimeout'])
//        {
//
//            $this->addError('AdminLoginForm','验证码超时，请刷新后重试');
//            return false;
//        }
		if(empty($this->user_name))
		{
			
			$this->addError('AdminLoginForm','账号不能为空');
			return false;
			
		}
		if(empty($this->user_pwd))
		{
			$this->addError('AdminLoginForm','密码不能为空');
			return false;
		}
		
		//如果已经超出尝试次数
		if($this->_exceededTimes())
		{
			$this->addError('AdminLoginForm','您的登录失败次数达到上限');
			return false;
			
		}
		//获取管理员信息
		$admin = Admin::find()->where('MD5(user_name)=:user_name',array(':user_name'=>$this->user_name))->limit(1)->one();
		//管理员不存在
		if(empty($admin))
		{
			$this->addError('AdminLoginForm','账号或密码错误'.$this->_failedTimes());
			return false;
		}
		//管理员已被禁用
		if($admin->disabled==1)
		{
			$this->addError('AdminLoginForm','账号已被禁用');
			return false;
		}
        $this->user_name = $admin->user_name;
		//密码不正确
		if(md5($this->user_pwd.$admin->encrypt)!=$admin->user_pwd)
		{
			$this->addError('AdminLoginForm','账号或密码错误'.$this->_failedTimes());
			return false;
		}
		else
		{

			$role = Role::find()->where(['role_id'=>$admin->role_id])->one();
			//角色被禁用
			if(empty($role)||$role->disabled)
			{
				$this->addError('AdminLoginForm','角色已被禁用，请联系管理员');
				return false;
			}
			else
			{
				$identityInfo = array();
				$identityInfo['admin_id']=$admin->admin_id;
				$identityInfo['user_name']=$admin->user_name;
				$identityInfo['role_id']=$admin->role_id;
				$identityInfo['email']=$admin->email;
                $identityInfo['real_name']=$admin->real_name;
				$identityInfo['role_name']=$role->role_name;
                $identityInfo['avatar']=$admin->avatar;
				$identityInfo['cookieHash'] = sys_auth($admin->user_name);
				if(!empty($admin->last_login_ip))
				{
					$identityInfo['last_login_ip']=$admin->last_login_ip;
				}
				
				if(!empty($admin->last_login_time)){
					$identityInfo['last_login_time']=$admin->last_login_time;
				}
				$identityInfo = sys_auth(array2string($identityInfo));

				Cookie::setCookie(Yii::$app->params['adminCookieName'],$identityInfo);//使用COOKIE记录用户身份信息
				//为锁屏功能设置的一个开关变量
                Cookie::setCookie('lockscreen',0);
				//更新用户最后登录时间和IP
				$admin->last_login_ip = MYIP;
				$admin->last_login_time = TIMESTAMP;
				if($admin->save(false))
				{
                    return true;
				}

			}
		}
		
	}


}