<?php
/**
 * Mp.php UTF-8
 * 微信程序
 *
 * @date    : 2018/8/9 16:25
 *
 * @license 这不是一个自由软件，未经授权不许任何使用和传播。
 * @author  : wuyonghong <wyh@huosdk.com>
 * @version : Huosdk 8.0
 */

namespace huolib\oauth\driver;

use huo\controller\common\CommonFunc;
use huolib\constant\CacheConst;
use huolib\oauth\OAuth;
use huolib\tool\Http;
use think\Cache;
use think\Exception;

class Mp extends OAuth {
    /**
     * 获取requestCode的api接口
     *
     * @var string
     */
    protected $request_code_url = 'https://open.weixin.qq.com/connect/oauth2/authorize';
    /**
     * 获取Access token的api接口
     *
     * @var String
     */
    protected $access_token_url = 'https://api.weixin.qq.com/sns/jscode2session';
    /**
     * 更新Access token的api接口
     *
     * @var String
     */
    protected $refresh_token_url = 'https://api.weixin.qq.com/sns/jscode2session';
    /**
     * API根路径
     *
     * @var string
     */
    protected $api_base = 'https://api.weixin.qq.com/sns/';
    /**
     * 获取request_code的额外参数 URL查询字符串格式
     *
     * @var string
     */
    protected $authorize = 'snsapi_userinfo';

    /**
     * Weixin constructor.
     *
     * @param array      $config
     * @param array|null $token
     *
     * @throws \think\Exception
     */
    public function __construct(array $config = [], array $token = null) {
        $_config = $config;
        if (empty($config)) {
            if (file_exists(GLOBAL_CONF_PATH."extra/oauth/weixin.php")) {
                $_config = include GLOBAL_CONF_PATH."extra/oauth/weixin.php";
            } else {
                $_config = array();
            }
        }
        parent::__construct($_config, $token);
    }

    /**
     *
     * 第一步：请求CODE 跳转URL
     * 请求Authorize访问地址
     *
     * @param string $display
     *
     * @return string 跳转地址
     */
    public function getRequestCodeUrl($display = 'pc') {
        $params = array(
            'appid'         => $this->app_key,
            'redirect_uri'  => $this->callback,
            'response_type' => $this->response_type,
            'scope'         => $this->authorize,
            'state'         => $this->getState(),
        );

        return $this->request_code_url.'?'.http_build_query($params).'#wechat_redirect';
    }

    /**
     * 第二步：通过code获取access_token
     * code2Session
     *
     * @param      $code
     * @param null $extend
     *
     * @return array|null
     * @throws Exception
     */
    public function getAccessToken($code, $extend = null) {
        $_cache_key = CacheConst::CACHE_SESSION_KEY_PREFIX . $code;
        $_data = Cache::get($_cache_key);
        if (!empty($_data)) return json_decode($_data, true);
        $_params = array(
            'appid'      => $this->app_key,
            'secret'     => $this->app_secret,
            'grant_type' => $this->grant_type,
            'js_code'    => $code,
        );
        $_rdata = Http::get($this->access_token_url, $_params);
        $this->token = $this->parseToken($_rdata);
        Cache::set($_cache_key, json_encode($this->token), 300);
        return $this->token;
    }

    /**
     * 刷新access_token有效期
     *
     * @param $refresh_token
     *
     * @return array|mixed|null
     * @throws Exception
     */
    public function getRefreshAccessToken($refresh_token) {
        $_params = array(
            'appid'         => $this->app_key,
            'refresh_token' => $refresh_token,
            'grant_type'    => $this->grant_type,
        );
        $_rdata = Http::get($this->refresh_token_url, $_params);
        $this->token = $this->parseToken($_rdata);

        return $this->token;
    }

    /**
     * 第三步：通过access_token调用接口
     *
     * @param  string $api    API
     * @param  string $param  调用API的额外参数
     * @param  string $method HTTP请求方法 默认为GET
     * @param null    $multi
     *
     * @return mixed
     * @throws Exception
     */
    public function call($api, $param = '', $method = 'GET', $multi = null) {
        $params = array(
            'access_token' => $this->token['access_token'],
            'openid'       => $this->getOpenid(),
            'lang'         => 'zh_CN'
        );
        $data = Http::request($this->url($api), $params, $method);

        return json_decode($data, true);
    }

    /**
     * 获取授权用户的用户信息
     *
     * @return array
     * @throws \Exception
     * https://open.weixin.qq.com/cgi-bin/showdocument?action=dir_list&t=resource/res_list&verify=1&id=open1419316518&lang=zh_CN
     *
     * openid    普通用户的标识，对当前开发者帐号唯一
     * nickname    普通用户昵称
     * sex    普通用户性别，1为男性，2为女性
     * province    普通用户个人资料填写的省份
     * city    普通用户个人资料填写的城市
     * country    国家，如中国为CN
     * headimgurl    用户头像，最后一个数值代表正方形头像大小（有0、46、64、96、132数值可选，0代表640*640正方形头像），用户没有头像时该项为空
     * privilege    用户特权信息，json数组，如微信沃卡用户为（chinaunicom）
     * unionid    用户统一标识。针对一个微信开放平台帐号下的应用，同一用户的unionid是唯一的。
     *
     */
    public function getUserInfo() {
        $_oauth_data = array(
            'openid'   => $this->token['openid'],
            'unionid'  => isset($this->token['unionid']) ? $this->token['unionid'] : '',
            'channel'  => 'mp',
            'nickname' => '',
            'gender'   => '',
            'avatar'   => '',
            'token'    => $this->token
        );

        return $_oauth_data;
    }

    /**
     * 获取当前授权用户的SNS标识
     *
     * @throws Exception
     */
    public function getOpenid() {
        $_data = $this->token;
        if (isset($_data['openid'])) {
            return $_data['openid'];
        } else {
            throw new Exception('没有获取到微信用户ID！');
        }
    }

    /**
     * @param string $refresh_token
     *
     * @return array
     */
    protected function getRefreshParam($refresh_token = '') {
        $_params = array(
            'appid'         => $this->app_key,
            'grant_type'    => 'refresh_token',
            'refresh_token' => $refresh_token,
        );

        return $_params;
    }

    /**
     * 解析access_token方法请求后的返回值
     *
     * @param      $result
     * @param null $extend
     *
     * @return mixed
     * @throws Exception
     */
    protected function parseToken($result, $extend = null) {
        $_rdata = json_decode($result, true);
        if (!empty($_rdata) && !empty($_rdata['session_key']) && !empty($_rdata['openid'])) {
            $_rdata['access_token'] = $_rdata['session_key'];
            $_rdata['expires_in'] = 0;
            $_rdata['unionid'] = isset($_rdata['unionid']) ? $_rdata['unionid'] : '';
            if (empty($_rdata['unionid'])) {
                $_rdata['unionid'] = CommonFunc::getUnionIdByEncryptedData($this->app_key, $_rdata['session_key']);
            }
            if (empty($_rdata['unionid'])) {
                $_rdata['unionid'] = $_rdata['openid'];
            }
            unset($_rdata['session_key']);
            $this->token = $_rdata;
            $_rdata['openid'] = $this->getOpenid();

            return $_rdata;
        } else {
            throw new Exception("获取微信 ACCESS_token 出错：{$result}");
        }
    }

    /**
     * https://developers.weixin.qq.com/minigame/dev/tutorial/open-ability/http-signature.html
     *
     */
    protected function checkSession($access_token,$openid,$signature,$sig_method){

    }
}