<?php
namespace Api\Controller;
use Think\Controller;
class ExtLoginController extends BaseController {


    // 根据用户名和LoginSecretToken登录
    public function bySecretKey(){
        $username = I("username") ;
        $key = I("key") ;
        $time = I("time") ;
        $token = I("token") ;
        $redirect = I("redirect") ;

        if($time < (time() - 60) ){
            $this->sendError(10101,"已过期");
            return ;
        }
        $login_secret_token = D("Options")->get("login_secret_token") ;

        $new_token = md5($username.$login_secret_token.$time);
        if($token !=  $new_token){
            $this->sendError(10101,"token不正确");
            return ;
        }
        
        $res = D("User")->where("( username='%s' ) ",array($username))->find();
        if(!$res){
            D("User")->register($username,md5("savsnyjh".time().rand()));
            $res = D("User")->where("( username='%s' ) ",array($username))->find();

        }
        if($res){
            // var_dump($res); return ;
            if($res['groupid'] == 1){
                $this->sendError(10101,"为了安全，禁止管理员通过这种方式登录");
                return ;
            }
            unset($res['password']);
            session("login_user" , $res );
            $token = D("UserToken")->createToken($res['uid'],60*60*24*180);
            cookie('cookie_token',$token,array('expire'=>60*60*24*180,'httponly'=>'httponly'));//此处由服务端控制token是否过期，所以cookies过期时间设置多久都无所谓
            if($redirect){
                $redirect = urldecode($redirect) ;
                header("location:{$redirect}");
            }else{
                header("location:../web/#/item/index");
            }
            
        }
    }

    public function oauth2(){
        $redirect = I("redirect") ;
        session('redirect',$redirect) ;
        $oauth2_open = D("Options")->get("oauth2_open" ) ;
        $oauth2_form = D("Options")->get("oauth2_form" ) ;
        $oauth2_form = json_decode($oauth2_form,1);

        if(!$oauth2_open){
            echo "尚未启用oauth2";
            return ;
        }
        

        $clientId = $oauth2_form['client_id'] ;
        $clientSecret = $oauth2_form['client_secret']  ;
        $redirectUri = $oauth2_form['redirectUri'];
        $urlAuthorize = $oauth2_form['protocol']."://".$oauth2_form['host'].$oauth2_form['authorize_path'] ;
        $urlAccessToken = $oauth2_form['protocol']."://".$oauth2_form['host'].$oauth2_form['token_path'] ;
        $urlResourceOwnerDetails = $oauth2_form['protocol']."://".$oauth2_form['host'].$oauth2_form['resource_path'] ;
        if(strstr($oauth2_form['userinfo_path'],"://")){
            $urlUserInfo = $oauth2_form['userinfo_path'] ;
        }else{
            $urlUserInfo = $oauth2_form['protocol']."://".$oauth2_form['host'].$oauth2_form['userinfo_path'] ;
        }
        
    
        $provider = new \League\OAuth2\Client\Provider\GenericProvider([
            'clientId'                => $clientId,    // The client ID assigned to you by the provider
            'clientSecret'            => $clientSecret,    // The client password assigned to you by the provider
            'redirectUri'             => $redirectUri ,
            'urlAuthorize'            => $urlAuthorize,
            'urlAccessToken'          =>  $urlAccessToken,
            'urlResourceOwnerDetails' => $urlResourceOwnerDetails,
        ],[
            'httpClient' => new \GuzzleHttp\Client(['verify' => false]),
        ]);
        
        // If we don't have an authorization code then get one
        if (!isset($_GET['code'])) {
        
            // Fetch the authorization URL from the provider; this returns the
            // urlAuthorize option and generates and applies any necessary parameters
            // (e.g. state).
            $authorizationUrl = $provider->getAuthorizationUrl();
        
            // Get the state generated for you and store it to the session.
            $_SESSION['oauth2state'] = $provider->getState();
        
            // Redirect the user to the authorization URL.
            header('Location: ' . $authorizationUrl);
            exit;
        
        // Check given state against previously stored one to mitigate CSRF attack
        } elseif (empty($_GET['state']) || (isset($_SESSION['oauth2state']) && $_GET['state'] !== $_SESSION['oauth2state'])) {
        
            if (isset($_SESSION['oauth2state'])) {
                unset($_SESSION['oauth2state']);
            }
        
            exit('Invalid state');
        
        } else {
        
            try {
        
                // Try to get an access token using the authorization code grant.
                $accessToken = $provider->getAccessToken('authorization_code', [
                    'code' => $_GET['code']
                ]);
        
                // We have an access token, which we may use in authenticated
                // requests against the service provider's API.
                //echo 'Access Token: ' . $accessToken->getToken() . "<br>";
                //echo 'Refresh Token: ' . $accessToken->getRefreshToken() . "<br>";
                //echo 'Expired in: ' . $accessToken->getExpires() . "<br>";
               // echo 'Already expired? ' . ($accessToken->hasExpired() ? 'expired' : 'not expired') . "<br>";
                
                $res = http_post($urlUserInfo,array(
                    "access_token"=>$accessToken->getToken()
                ));
                $res_array = json_decode($res, true);
                if($res_array){
                    $username = $res_array['username'] ;
                    $info = D("User")->where("username='%s'" ,array($username))->find();
                    if(!$info){
                        D("User")->register($username,md5($username.time().rand()));
                        $info = D("User")->where("username='%s'" ,array($username))->find();
                    }

                    unset($info['password']);
                    session("login_user" , $info );
                    $token = D("UserToken")->createToken($info['uid'],60*60*24*180);
                    cookie('cookie_token',$token,array('expire'=>60*60*24*180,'httponly'=>'httponly'));//此处由服务端控制token是否过期，所以cookies过期时间设置多久都无所谓
                    if(session('redirect')){
                        $redirect = urldecode(session('redirect')) ;
                        header("location:{$redirect}");
                        session('redirect',null) ;

                    }else{
                        header("location:../web/#/item/index");
                    }

                }else{
                    echo "登录成功但无法获取用户信息";
                }


            } catch (\League\OAuth2\Client\Provider\Exception\IdentityProviderException $e) {
        
                // Failed to get the access token or user details.
                exit($e->getMessage());
        
            }
        
        }
    }

    
    public function cas(){
        define("CAS_VERSION_1_0", '1.0');
        define("CAS_VERSION_2_0", '2.0');
        define("CAS_VERSION_3_0", '3.0');

        # 2 开启phpCAS debug
        \phpCAS::setDebug();

        # 3 初始化phpCAS,参数说明：
        # a) CAS协议版本号
        # b) cas server的域名
        # c) cas server的端口号
        # d) cas server的项目访问路径
        \phpCAS::client(CAS_VERSION_2_0, '192.168.8.160', 8443, '/maxkey/authz/cas/');

        # 4 开启设置证书验证。如果是开发环境可将此注释，如果是生产环境为了安全性建议将此开启
        // phpCAS::setCasServerCACert($cas_server_ca_cert_path);

        # 5 不为CAS服务器设置SSL验证
        # 为了快速测试，您可以禁用CAS服务器的SSL验证。此建议不建议用于生产环境。验证CAS服务器对CAS协议的安全性至关重要！
        \phpCAS::setNoCasServerValidation();

        # 6 这里会检测服务器端的退出的通知，就能实现php和其他语言平台间同步登出了
        # 处理登出请求。cas服务端会发送请求通知客户端。如果没有同步登出，可能是服务端跟客户端无法通信（比如我的客户端是localhost, 服务端在云上）
        \phpCAS::handleLogoutRequests();

        # 7 进行CAS服务验证，这个方法确保用户是否验证过，如果没有验证则跳转到验证界面
        # 这个是强制认证模式，查看 CAS.php 可以找到几种不同的方式：
        # a) forceAuthentication - phpCAS::forceAuthentication();
        # b) checkAuthentication - phpCAS::checkAuthentication();
        # c) renewAuthentication - phpCAS::renewAuthentication();
        # 根据自己需要调用即可。
        $auth = \phpCAS::forceAuthentication();
        if ($auth) {
            var_dump($auth);
            return ;
            # 8 验证通过，或者说已经登陆系统，可进行已经登陆之后的逻辑处理...
            # 获得登陆CAS用户的名称
            $user_name = \phpCAS::getUser();
            echo $user_name . '已经成功登陆...<br>';

            # 9 你还可打印保存的phpCAS session信息
            print_r($_SESSION);

            # 10 还可获取有关已验证用户的属性,例如：$uid = phpCAS::getAttribute('id');
            $attr = \phpCAS::getAttributes();
            print_r($attr);

            # 11 进行退出的相关操作
            # 在你的PHP项目中处理完相应的退出逻辑之后，还需执行phpCAS::logout()进行CAS系统的退出
            # 当我们访问cas服务端的logout的时候，cas服务器会发送post请求到各个已经登录的客户端
            //phpCAS::logout();

            # 登出方法一：登出成功后跳转的地址
            //phpCAS::setServerLoginUrl("https://192.168.1.120:80/cas/logout?embed=true&service=http://localhost/phpCasClient/user.php?a=login");
            //phpCAS::logout();
            # 登出方法二：退出登录后返回地址
            //$param = array("service" => "http://cas.x.com");
            //phpCAS::logout($param);

        } else {
            # 12 验证未通过，说明未进行登陆
            # 将会跳转回你配置的CAS SSO SERVER服务的域名；
            # 在你输入正确的用户名和密码之后CAS会自动跳转回service=http%3A%2F%2Fcas.x.com%2F此地址
            # 在此你可以处理验证未通过的各种逻辑
            echo '还未登陆，跳转到CAS进行登陆...<br>';
        }

    }


}