<?php

namespace app\utils;

use app\constant\ResponseCode;
use GuzzleHttp\Client;
use support\Cache;
use think\Exception;

class WechatUtil
{
    const GENERAL_ACCESS_TOKEN = 'general_access_token';
    const CODE_ACCESS_TOKEN = 'code_access_token';
    const BASE_URI = 'https://api.weixin.qq.com';

    /**
     * @desc 获取access token
     * @return array|mixed|void
     * @throws \GuzzleHttp\Exception\GuzzleException
     */
    public static function getAccessToken()
    {
        try {
//            $str = '83_0jVm82U7ri-UENTGoTTFh2jowRpAN379ahJvK_3HpLPbdIheIr-ahgYhc5kkHv6dDYyaHklwqffKRQYOxURrQ-H8xq8kYvjoajYZQBNFhMCaBJs0VOU4PE5_-bYPUXfAAAXCF';
//            Cache::set(self::GENERAL_ACCESS_TOKEN, $str, 3500);
//            Cache::delete(self::GENERAL_ACCESS_TOKEN);
            if (Cache::has(self::GENERAL_ACCESS_TOKEN)) {
                return Cache::get(self::GENERAL_ACCESS_TOKEN);
            } else {
                $client = new Client(['base_uri' => self::BASE_URI]);
                $response = $client->request('post', 'cgi-bin/stable_token', [
                    'json' => [
                        'grant_type' => 'client_credential',
                        'appid' => getenv('APP_ID'),
                        'secret' => getenv('APP_SECRET'),
                    ]
                ]);
                $response_contents = $response->getBody()->getContents();
                raw_log('wechat/access_token', ['result' => $response_contents]);
                if ($response->getStatusCode() == 200) {
                    $result = json_decode($response_contents, true);
                    raw_log('wechat/access_token', ['result' => $result]);
                    if (isset($result['errcode'])) {
                        throw new Exception($result['errmsg']);
                    }
                    Cache::set(self::GENERAL_ACCESS_TOKEN, $result['access_token'], $result['expires_in'] - 60);

                    return $result['access_token'];
                }
            }
        } catch (Exception $e) {
            return [
                'code' => ResponseCode::FAIL,
                'msg' => $e->getMessage()
            ];
        }
    }

    /**
     * @desc 获取网页授权code的access_token
     * @param $code
     * @return array|void
     * @throws \GuzzleHttp\Exception\GuzzleException
     */
    public static function getCodeAccessToken($code)
    {
        try {
            $client = new Client(['base_uri'=>self::BASE_URI]);
            $response = $client->request('get', 'sns/oauth2/access_token', [
                'query' => [
                    'appid' => getenv('APPID'),
                    'secret' => getenv('APPSECRET'),
                    'code'=>$code,
                    'grant_type'=>'authorization_code'
                ]
            ]);

            $response_contents = $response->getBody()->getContents();
            raw_log('wechat/code_access_token', ['result' => $response_contents]);
            if ($response->getStatusCode() == 200) {
                $result = json_decode($response_contents, true);
                raw_log('wechat/code_access_token', ['result' => $result]);
                if (isset($result['errcode'])) {
                    throw new Exception($result['errmsg']);
                }
                return $result;
            }

        }catch (Exception $e){
            return [
                'code'=>ResponseCode::FAIL,
                'msg'=>$e->getMessage()
            ];
        }
    }

}