<?php
namespace app;
use app\View;
use app\RRException;
use \Firebase\JWT\JWT;
use app\MySqlite;

define('KEY', 'bf731bcb3f5e52ec1b8b12c95f503d7a'); //密钥

class Index extends View
{

	// public function __construct(){
	// 	// $this->route = new Route();
	// }
 
    public function index()
    {
        $doc = $GLOBALS['doc'];

        $doc = ltrim($doc, '/');

        if (substr($doc, -1) === '/') {
            $doc = $doc . "index.md";
        }
        // var_dump($doc);
        // exit;
        $doc = empty($doc) ? 'index.md' : $doc;
        if (pathinfo($doc,PATHINFO_EXTENSION) != 'md') {
            $doc = $doc . ".md";
        }

        $filename = DATA_PATH . $doc;
        $text = "";
        $toc = "";
        $content = "";

        if ($is_file_exists = file_exists($filename)) {
            $parsedownExtension = new \ParsedownExtension();
            $parsedownExtension->setTocEnabled(true);
            $text = file_get_contents($filename);
            $res = $parsedownExtension->text($text);
            $toc = $res['toc'];
            $content = $res['content'];
        }
        
        $this->assign('doc',$doc);
        $this->assign('is_file_exists', $is_file_exists);
        $this->assign('text',$text);
        $this->assign('toc',$toc);
        $this->assign('content',$content);

        $this->fetch();
    }

    public function editor()
    {
        $doc = $GLOBALS['doc'];
        var_dump($doc);
        exit;
        $this->fetch();
    }

    public function save()
    {
        $this->validate();

        // $doc = $_POST['doc'];
        // $content = $_POST['content'];

        // 获取payload json数据，转换成数组形式
        $postData = file_get_contents('php://input');
        $requests = !empty($postData) ? json_decode($postData, true) : [];

        $doc = $requests['doc'];
        $content = $requests['content'];

        $pathinfo = pathinfo($doc);
        
        $dir_name = DATA_PATH . $pathinfo['dirname'];

        if (!is_dir($dir_name) && !mkdir($dir_name, 0744, true)) {
            die(json_encode(['code'=>2, 'msg'=>'目录创建失败']));
        }

        $filename = DATA_PATH . $doc;

        $res = file_put_contents($filename, $content);

        if ($res === false) {
            echo json_encode(['code'=>2, 'msg'=>'保存失败']);
        } else {
            echo json_encode(['code'=>0, 'msg'=>'保存成功, 字数:' . $res]);
        }
        die();
    }

    public function login()
    {
        if ($_SERVER['REQUEST_METHOD'] == 'POST') {
            $username = htmlentities($_POST['username']);
            $password = htmlentities($_POST['password']);

            $sql = "select * from sys_user where username='" . $username . "' limit 0,1";

            $mysqlite = new MySqlite();

            $user = $mysqlite->getOne($sql);

            if ($username !== $user['username'] && md5($password) !== $user['password']) {
                throw new RRException("用户名或密码错误!", 401);
            }
    
            // 用户名和密码正确，则签发tokon
            $nowtime = time();
            $jwtInfo = [
                'iss' => 'huwhois@163.com', //签发者
                'iat' => $nowtime, //签发时间
                'nbf' => $nowtime + 10, //在什么时间之后该jwt才可用
                'exp' => $nowtime + 64800, //过期时间-18h
                'data' => [
                    'userid' => $user['id'],
                    'username' => $username
                ]
            ];
            $token = JWT::encode($jwtInfo, KEY);
            echo json_encode(['code'=>0, 'msg'=>'success', 'token'=>$token]);
        }
        die();
    }

    private function validate ()
    {
        $jwt = isset($_SERVER['HTTP_TOKEN']) ? $_SERVER['HTTP_TOKEN'] : '';
        if (empty($jwt)) {
            throw new RRException("You do not have permission to access.", 401);
        }
    
        try {
            JWT::$leeway = 60;
            $decoded = JWT::decode($jwt, KEY, ['HS256']);
            $arr = (array)$decoded;
            if ($arr['exp'] < time()) {
                throw new RRException("认证信息已过期, 请重新登录.", 401);
            }
        } catch(\Exception $e) {
            throw new RRException($e->getMessage(), 401);
        }

        return true;
    }
}