<?php
namespace User\Lib;

use Dever;

# 小程序
class Applet
{
	public function getOpenid($uid, $system_source = 5, $project_id = 1)
	{
		$openid = false;
		$code = Dever::input('code');
		if ($code) {
			$info = $this->getInfo($code);
			if (isset($info['openid'])) {
                $openid = $info['openid'];
                Dever::load('user/lib/wechat')->update($uid, $openid, $system_source, $project_id);
            }
		}
		if (!$openid && $uid > 0) {
            $wechat = Dever::load('user/lib/wechat')->getInfo($uid, $system_source, $project_id);
            if ($wechat) {
                $openid = $wechat['openid'];
            }
        }

		return $openid;
	}

    private function getInfo($code)
    {
        $session_key = Dever::input('session_key');
        if ($session_key) {
            return array('session_key' => $session_key, 'openid' => $openid);
        }
        $applet = $this->getApplet();
        $appid = $applet['appid'];
        $secret = $applet['secret'];
        $url = $applet['url'];
        if (!$applet || !$applet['appid'] || !$applet['secret']) {
            Dever::alert('错误的appid');
        }

        $url .= '?appid=' . $appid;
        $url .= '&secret=' . $secret;
        $url .= '&js_code=' . $code;
        $url .= '&grant_type=authorization_code';

        $data = Dever::curl($url);
        Dever::log($data, 'passport_applet');
        if (strstr($data, 'errcode')) {
            Dever::alert($data);
        }

        $data = Dever::json_decode($data);

        return $data;
    }

    private function unionid($session_key)
    {
        $data = $this->decryptData($session_key);
        if ($data && isset($data->unionId)) {
            return $data->unionId;
        }
        
        return false;
    }

    private function getWechatData($session_key)
    {
        $result = array();
        $data = $this->decryptData($session_key);

        $result['openid'] = '';
        $result['unionid'] = '';
        $result['mobile'] = '';
        $result['phone'] = '';
        if ($data && isset($data->openId)) {
            $result['openid'] = $data->openId;
            if (isset($data->unionId)) {
                $result['unionid'] = $data->unionId;
            }
        }

        if ($data && isset($data->phoneNumber)) {
            if (isset($data->phoneNumber)) {
                $result['phone'] = $data->phoneNumber;
            }
        }

        if ($data && isset($data->purePhoneNumber)) {  
            if (isset($data->purePhoneNumber)) {
                $result['mobile'] = $data->purePhoneNumber;
            }
        }
        
        return $result;
    }

    private function decryptData($session_key)
    {
        $iv = Dever::input('iv');
        $encryptedData = Dever::input('encryptedData');

        if (!$iv || !$encryptedData) {
            return false;
        }
        if (strlen($session_key) != 24) {
            return false;
        }
        if (strlen($iv) != 24) {
            return false;
        }

        $aesKey = base64_decode($session_key);

        $aesIV = base64_decode($iv);

        $aesCipher = base64_decode($encryptedData);

        $result = openssl_decrypt($aesCipher, "AES-128-CBC", $aesKey, 1, $aesIV);

        $dataObj = json_decode($result);
        if ($dataObj  == NULL) {
            return false;
        }
        /*
        $applet = Dever::config('base', 'project')->applet;
        $appid = $applet['appid'];
        if($dataObj->watermark->appid != $appid) {
            return false;
        }*/
        return $dataObj;
    }

    private function getApplet()
    {
        $applet = Dever::config('base', 'project')->applet;
        $system = Dever::input('system', 1);

        $system = Dever::db('passport/system')->find($system);
        $project = false;
        if ($system && $system['token_project_id'] > 0 && Dever::project('token')) {
            $project = Dever::db('token/project')->find($system['token_project_id']);
        }

        if ($project) {
            $applet['appid'] = $project['appid'];
            $applet['secret'] = $project['secret'];
        }

        if (!$applet || !$applet['appid'] || !$applet['secret']) {
            Dever::alert('错误的appid');
        }

        return $applet;
    }
}