<?php


namespace app\mobile\logic;

//关于微信相关操作的工具类
use think\Exception;
use think\exception\ValidateException;
use think\facade\Config;
use think\facade\Validate;

class WechatLogic
{

    //获取微信网页授权URL
    //$param $callback string 微信回跳地址（接口已经默认url_encode处理，授权成功会有$_GET['code']值，可用于下个步骤）
    //$param $state string 重定向后会带上state参数（开发者可以填写a-zA-Z0-9的参数值，最多128字节）
    //$param $scope string 应用授权作用域（snsapi_base | snsapi_userinfo）
    public static function getOauthRedirect(string $callback = '', string $state = '', string $scope = 'snsapi_base'): string
    {

        $val = Validate::rule([
            'callback|微信回跳地址' => 'require|url',
            'state|携带参数' => 'require|length:1,255',
            'scope|应用授权作用域' => 'require|in:snsapi_base,snsapi_userinfo'
        ]);

        if (!$val->check(['callback' => $callback, 'state' => $state, 'scope' => $scope])) throw new ValidateException($val->getError());

        $oauth = &load_wechat('Oauth');

        $rs = $oauth->getOauthRedirect($callback, $state, $scope);

        halt('调用成功', $rs);

    }


    //通过code换取网页授权access_token(和openId)
    public static function getOauthAccessToken()
    {

        $oauth = &load_wechat('Oauth');

        $rs = $oauth->getOauthAccessToken();

        halt('最终结果：', $rs);
    }


    //获取预支付信息
    public static function getPrepayId(string $openid = '', string $body = '', string $out_trade_no = '', float $total_fee = 0, string $notify_url = '', string $trade_type = "JSAPI")
    {

        if ($notify_url == '') $notify_url = env('notify_url');

        $pay = &load_wechat('Pay');

        $rs = $pay->getPrepayId($openid, $body, $out_trade_no, bcmul($total_fee, '100'), $notify_url, $trade_type);

        halt('预支付结果：', $rs);
    }


    //支付通知回调
    public static function Notify()
    {

        //实例化支付接口
        $pay = &load_wechat('Pay');

        //获取支付通知
        $notifyInfo = $pay->getNotify();

        if ($notifyInfo === false) throw new Exception('获取微信支付通知数据失败,' . $pay->errMsg);
        elseif ($notifyInfo['result_code'] == 'SUCCESS' && $notifyInfo['return_code'] == 'SUCCESS') return $notifyInfo;// 支付状态完全成功，可以更新订单的支付状态了
        else throw new Exception('获取微信支付通知数据失败,' . json_encode($notifyInfo, JSON_UNESCAPED_UNICODE));

    }


}