<?php

namespace App\Servers\WeChat;

use App\Servers\Common\RedisDataServer;

class WeixinServer
{

    /**
     * 单列对象
     * @var
     */
    private static $server = '';

    public $appid = '';
    public $appsecret = '';

    private function __construct(){

        $this->appid=env('WX_APPID','');
        $this->appsecret=env('WX_APPSECRET','');
    }

    /**
     * 创建对象
     * @return WeixinServer
     */
    static function creatServer()
    {
        if(empty(self::$server)){
            self::$server = new WeixinServer();
        }
        return self::$server;
    }

    /**
     * 网页授权
     * @return mixed
     */
    function authorize()
    {
        $code = request()->input('code', '');
        if (empty($code)) {
            $redirect_url = $this->getServerUrl();
            $url = "https://open.weixin.qq.com/connect/oauth2/authorize?appid={$this->appid}&redirect_uri={$redirect_url}&response_type=code&scope=snsapi_base&state=STATE#wechat_redirect";
            $this->redirect($url);
            return false;
        } else {
            $url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid={$this->appid}&secret={$this->appsecret}&code={$code}&grant_type=authorization_code";
            $result = $this->sendRequest($url);
            $result = json_decode($result, true);
            if (isset($result['errcode'])) {
                return false;
            } else {
//                $openid = $result['openid'];
//                $access_token = $result['access_token'];
//                $url = "https://api.weixin.qq.com/sns/oauth2/refresh_token?appid={$this->appid}&grant_type=refresh_token&refresh_token={$result['refresh_token']} ";
//                $result = $this->sendRequest($url);
//                $result = json_decode($result, true);
//                if (isset($result['access_token'])) {
//                    $access_token = $result['access_token'];
//                    $openid = $result['openid'];
//                }
//                $url = "https://api.weixin.qq.com/sns/userinfo?access_token={$access_token}&openid={$openid}&lang=zh_CN";
//                $result = $this->sendRequest($url);
//                $result = json_decode($result, true);
//                if (isset($result['errcode'])) {
//                    return false;
//                }
                return $result;
            }
        }

    }

    /**
     * 获取当前连接
     * @return string
     */
    function getServerUrl()
    {
        return urlencode('http://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']);
    }


    function redirect($uri = '', $method = 'location', $http_response_code = 302)
    {
        if (!preg_match('#^https?://#i', $uri)) {
            $uri = site_url($uri);
        }
        switch ($method) {
            case 'refresh'    :
                header("Refresh:0;url=" . $uri);
                break;
            default            :
                header("Location: " . $uri, TRUE, $http_response_code);
                break;
        }
        exit();
    }

    /**
     * @param $url
     * @param string $type 请求方式
     * @param string $data 数据 数组格式
     * @return mixed
     */
    protected function sendRequest($url, $type = 'get', $data = '')
    {

        $ch = curl_init();
        if ($type == 'get' && $data) {
            $url = $url . '?' . http_build_query($data);
        }
        curl_setopt($ch, CURLOPT_URL, $url); //设置访问路径
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE); //设置可以返回字符串
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
        $head = array('User-Agent:Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.103 Safari/537.36');
        curl_setopt($ch, CURLOPT_HTTPHEADER, $head);
        if ($type == 'post') {
            curl_setopt($ch, CURLOPT_POST, TRUE);//post请求
            $data = json_encode($data, JSON_UNESCAPED_UNICODE);
            curl_setopt($ch, CURLOPT_POSTFIELDS, $data);//设置传递的参数
        }
        $request = curl_exec($ch);
        curl_close($ch);
        return $request;
    }


    /**
     * 获取js授权信息
     * @return mixed
     */
    function getJsConfig($url = '')
    {
        $hash = '';
        $chars = 'ABCDEFGHIJKMNPQRSTUVWXYZabcdefghijkmnpqrstuvwxyz';
        $max = strlen($chars) - 1;
        for ($i = 0; $i < 16; $i++) {
            $hash .= $chars[mt_rand(0, $max)];
        }
        $data['noncestr'] = $hash;
        $data['jsapi_ticket'] = $this->getJsTicket();
        $data['timestamp'] = time();
        if (empty($url)) {
            $data['url'] = $this->getServerUrl();
        } else {
            $data['url'] = $url;
        }
        ksort($data);
        $str = '';
        foreach ($data as $key => $val) {
            $str .= '&';
            $str .= $key . '=' . $val;
        }
        $str = mb_substr($str, 1);
        $data['appid'] = $this->appid;
        $data['signature'] = sha1($str);
        unset($data['jsapi_ticket']);
        return $data;
    }

    /**
     * 获取 access_token
     * @return bool
     */
    protected function getAccessToken($type = 1)
    {
        $key = 'vouchername';
        $appId = $this->appid;
        $appsecret = $this->appsecret;

        $data = RedisDataServer::creatServer()->getData($key, 'json');
        if (empty($data) || $data['endtime'] < time() || true) {
            $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={$appId}&secret={$appsecret}";
            $result = $this->sendRequest($url);
            $result = json_decode($result, true);
//            $bey = Cache::set('vouchername', array('access_token' => $result['access_token'], 'endtime' => time() + 7000), 7000);
            if ( isset($result['access_token'])) {
                RedisDataServer::creatServer()->setData($key, array('access_token' => $result['access_token'], 'endtime' => time() + 1800), 'json',1800);
                return $result['access_token'];
            } else {
                return false;
            }
        } else {
            return $data['access_token'];
        }
    }

    /**
     * 获取Js调用凭证
     * @return bool
     */
    function getJsTicket()
    {
//        $data = Cache::get('js_ticket');
        $data = RedisDataServer::creatServer()->getData('js_ticket', 'json');
        if (empty($data) || $data['endtime'] < time()) {
            $access_token = $this->getAccessToken();
            $url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token={$access_token}&type=jsapi";
            $result = $this->sendRequest($url);
            $result = json_decode($result, true);
            if ($result['errcode'] == 0) {
                //file_put_contents($this->js_ticket,serialize(array('access_token'=>$result['access_token'],'endtime'=>time()+7000)));
//                Cache::set('js_ticket', array('access_token' => $result['ticket'], 'endtime' => time() + 7000), 7000);
                RedisDataServer::creatServer()->setData('js_ticket', array('access_token' => $result['ticket'], 'endtime' => time() + 7000), 'json',7000);
                return $result['ticket'];
            }
            return false;
        } else {
            return $data['access_token'];
        }
    }
}