<?php

namespace app\service\wx;

use EasyWeChat\Factory;
use EasyWeChat\Kernel\Exceptions\HttpException;
use EasyWeChat\Kernel\Exceptions\InvalidArgumentException;
use EasyWeChat\Kernel\Exceptions\InvalidConfigException;
use EasyWeChat\Kernel\Exceptions\RuntimeException;
use EasyWeChat\MiniProgram\Application;
use Exception;
use GuzzleHttp\Client;
use GuzzleHttp\Exception\GuzzleException;
use think\facade\Config;
use think\facade\Log;

/**
 * 微信小程序
 * Class WechatApplets
 * @package app\service\wx
 */
class WechatApplets
{
    private static $app = null;

    /**
     * TODO 正式上线时需要替换模板配置信息和相关小程序配置信息
     */
    // 订阅消息模板：预约通知
    public const SUBSCRIBE_TPL_APPOINTMENT = 'uvGd7RqaegheGU-uVxR-uM3y2MadZeMOHdQaNiiWm8U';

    private function __construct()
    {
    }

    private function __clone()
    {
    }

    //微信小程序实例  单例模式
    public static function getInstance(): ?Application
    {
        if (self::$app == null) {
            Config::load('extra/wechat', 'wechat');
            $conf      = config('wechat');
            $config    = [
                // 必要配置
                'app_id'        => $conf['applets_appId'],
                'secret'        => $conf['applets_appSecret'],
                // 返回数据类型 array | xml
                'response_type' => 'array',
            ];
            self::$app = Factory::miniProgram($config);
        }
        return self::$app;
    }

    /**
     * 生成微信小程序链接
     *
     * @param  string  $path
     * @param  string  $sourceCode
     * @param  bool  $tokenRefresh  是否强制刷新access_token 默认false  非特殊条件请勿设为true
     * @return string
     * @throws GuzzleException
     * @throws HttpException
     * @throws InvalidArgumentException
     * @throws InvalidConfigException
     * @throws RuntimeException
     * @throws \Psr\SimpleCache\InvalidArgumentException
     */
    public static function generateActivityUrl(string $path, string $sourceCode, bool $tokenRefresh = false): string
    {
        $accessToken = self::getInstance()->access_token;

        $client = new Client();

        $url = 'https://api.weixin.qq.com/wxa/generate_urllink?access_token=';

        $params         = [];
        $query          = '';
        $params['path'] = 'pages/tabbar/pagehome/pagehome';//首页路径
        if (!empty($path)) {
            $pathArr        = explode('?', $path);
            $query          = isset($pathArr[1]) ? $pathArr[1].'&' : '';
            $params['path'] = $pathArr[0];
        }

        $params['query'] = $query.'channel=activity&source_code='.$sourceCode;
        $jsonStr         = !empty($params) ? json_encode($params, JSON_UNESCAPED_UNICODE) : '';

        Log::info('【小程序链接生成请求参数】'.$jsonStr);

        $response = $client->request('POST', $url.($accessToken->getToken($tokenRefresh)['access_token'] ?? ''), [
            'body' => $jsonStr
        ]);

        $res = json_decode($response->getBody(), true);
        Log::info('【小程序链接生成响应】'.json_encode($res, JSON_UNESCAPED_UNICODE));
        if ($res['errcode'] == 0) {
            return $res['url_link'] ?? '';
        }

        if ($res['errcode'] == 40001 && $tokenRefresh == false) {
            // 可能是token过期 刷新一次
            // tokenRefresh 防止无限循环
            return self::generateActivityUrl($path, $sourceCode, true);
        }

        throw new Exception('链接生成失败 '.$res['errmsg'] ?? '');
    }
}