<?php
namespace common\services;

use common\helpers\FuncHelper;
use EasyWeChat\Factory;
use yii\base\Exception;

class WechatService
{
    private static $instance = null;
    public $app;
    public $wechat;
    public $payment;

    private function __clone()
    {

    }

    private function __construct($module = null)
    {
        // if ($module) {
        //     // 获取另一个模块的实例的配置内容
        //     \Yii::setAlias("@{$module}", dirname(dirname(__DIR__)) . "/{$module}");
        //     $params = include \Yii::getAlias("@{$module}/config/params-local.php");
        //     $config = $params['wechat'];
        // } else {
            $config = \Yii::$app->params['wechat'];
        // }

        // ... 在应用配置之前初始化
        if(!$config['app_id'] || !$config['app_secret'] || !$config['merchant_id'] || !$config['merchant_key'] || !$config['apiclient_cert'] || !$config['apiclient_key']){
            throw new \Exception('请设置支付配置');
        }
        if ($config['apiclient_cert'] && $config['apiclient_key']) {
            list($sslCer, $sslKey) = $this->generatePem($config['apiclient_cert'], $config['apiclient_key']);
        }

        $app_id    = $config['app_id'];
        $app_secret   = $config['app_secret'];
        $mch_id   = $config['merchant_id'];
        $key    = $config['merchant_key'];
        $cert_path  = $sslCer;
        $key_path   = $sslKey;

        $config = [
            'app_id' => $app_id,
            'secret' => $app_secret,

            // 下面为可选项
            // 指定 API 调用返回结果的类型：array(default)/collection/object/raw/自定义类名
            'response_type' => 'array',

            'log' => [
                'level' => 'debug',
                'file' => \Yii::getAlias('@member').'/runtime/wechat.log',
            ],

            //支付参数
            'mch_id'             => $mch_id,
            'key'                => $key,   // API v2 密钥 (注意: 是v2密钥 是v2密钥 是v2密钥)

            // 如需使用敏感接口（如退款、发送红包等）需要配置 API 证书路径(登录商户平台下载 API 证书)
            'cert_path'          => $cert_path, // XXX: 绝对路径！！！！
            'key_path'           => $key_path,      // XXX: 绝对路径！！！！
        ];
        \Yii::error('支付参数：'.json_encode($config));
        $this->wechat   = Factory::officialAccount($config);//公众号
        $this->app  = Factory::miniProgram($config);//小程序
        $this->payment  = Factory::payment($config);//支付
    }


    public static function getInstance($module = null)
    {
        if(empty(self::$instance)){
            self::$instance = new self($module);
        }
        return self::$instance;
    }

    /**
     * @param $cert_pem
     * @param $key_pem
     */
    private function generatePem($cert_pem, $key_pem)
    {
        $pemDir = \Yii::$app->runtimePath . '/pem';
        FuncHelper::make_dir($pemDir);
        $certPemFile = $pemDir . '/' . md5($cert_pem);
        if (!file_exists($certPemFile)) {
            file_put_contents($certPemFile, $cert_pem);
        }
        $keyPemFile = $pemDir . '/' . md5($key_pem);
        if (!file_exists($keyPemFile)) {
            file_put_contents($keyPemFile, $key_pem);
        }
        return [$certPemFile, $keyPemFile];
    }
}