<?php
declare (strict_types = 1);

namespace app\service\wechat;

use app\model\WechatUser;
use app\service\BaseService;
use fast\Http;

class WechatService extends BaseService
{
    protected $token = "";
    protected $appid = "";
    protected $appsecret = "";

    protected $redis = null;

    public function __construct()
    {
        parent::__construct();

        if($token = env('wechat.token')){
            $this->token = $token;
        }

        $this->appid = env('wechat.appid');
        $this->appsecret = env('wechat.appsecret');

        $this->redis = new \Redis();
        $this->redis->connect('127.0.0.1', 6379);
    }

    public function wechatChekToken($signature, $timestamp, $nonce){

        $data = array($this->token, $timestamp, $nonce);
        sort($data, SORT_STRING);
        $str = sha1(implode( $data ));

        if($str == $signature){
            return true;
        }
        return false;
    }

    /**
     * 获取accessToken
     * @return mixed|\Redis|string
     * @throws \fast\FuncException
     */
    public function getAccessToken(){
        $access_token = $this->redis->get('wechat_access_token');
        if($access_token){
            return $access_token;
        }
        $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={$this->appid}&secret={$this->appsecret}";
        $http = new Http();
        $res = $http::get($url);
        if($res['code'] != 200){
            throw new \fast\FuncException($res['msg']);
        }
        $data = json_decode($res['data'], true);
        if(isset($data['errcode']) && $data['errcode'] != 0){
            throw new \fast\FuncException($data['errmsg']);
        }
        $this->redis->set('wechat_access_token', $data['access_token'], 7200);
        return $data['access_token'];

    }


    public function wechatEvent(){

        $data = file_get_contents("php://input");
        $obj = simplexml_load_string($data,"SimpleXMLElement", LIBXML_NOCDATA);
        $this->log->info('消息', $obj->FromUserName);

        $event = $obj->MsgType;
        switch ($event){
            case 'event':
                $event = $obj->Event.'_'.$obj->MsgType;
                $this->$event($obj);
                break;
        }


    }


    public function subscribe_event($obj){
        $url = "https://api.weixin.qq.com/cgi-bin/user/info?access_token=".$this->getAccessToken()."&openid=".$obj->FromUserName."&lang=zh_CN";
        $http = new Http();
        $res = $http::get($url);
        if($res['code'] != 200){
            throw new \fast\FuncException($res['msg']);
        }
        $data = json_decode($res['data'], true);
        if(isset($data['errcode']) && $data['errcode'] != 0){
            throw new \fast\FuncException($data['errmsg']);
        }

        $user = WechatUser::where('openid', $data['openid'])->where('unionid', $data['unionid'])->where('is_deleted', 0)->find();
        if($user){
            $user->subscribe = 1;
            $user->subscribe_time = date('Y-m-d H:i:s', $data['subscribe_time']);
            $user->save();
            return;
        }

        $user = [
            'nickname' => $data['nickname'],
            'headimgurl' => $data['headimgurl'],
            'openid' => $data['openid'],
            'unionid' => $data['unionid'],
            'subscribe_time' => date('Y-m-d H:i:s', $data['subscribe_time']),
            'subscribe' => 1,
        ];
        (new WechatUser())->save($user);
    }


    public function unsubscribe_event($obj){
        $url = "https://api.weixin.qq.com/cgi-bin/user/info?access_token=".$this->getAccessToken()."&openid=".$obj->FromUserName."&lang=zh_CN";
        $http = new Http();
        $res = $http::get($url);
        if($res['code'] != 200){
            throw new \fast\FuncException($res['msg']);
        }
        $data = json_decode($res['data'], true);
        if(isset($data['errcode']) && $data['errcode'] != 0){
            throw new \fast\FuncException($data['errmsg']);
        }

        $user = WechatUser::where('openid', $data['openid'])->where('unionid', $data['unionid'])->where('is_deleted', 0)->find();
        if($user){
            $user->subscribe = 0;
            $user->save();
        }
    }
}