package server

import (
	"context"
	"fmt"
	"github.com/go-pay/gopay"
	"github.com/go-pay/gopay/wechat/v3"
	"github.com/shopspring/decimal"
	"github.com/spf13/viper"
	"go.uber.org/zap"
	"go_zh/pkg/utils"
	"sync"
)

type WeChatServer struct {
	MchId                string
	PrivateKey           string
	CertFile             string //公钥证书地址
	PrivateKeyFile       string //私钥证书地址
	CertificateSerialNo  string
	WechatPayPublicKeyId string
	AppId                string //appid
	AppSecret            string
	AppletId             string
	AppletKey            string
	PublicKeyInfo        string
	PrivateKeyFileInfo   string
}

var (
	weChatServerInstance *WeChatServer
	weChatServerOnce     sync.Once
)

// GetWeChatServerInstance 获取单例实例
func GetWeChatServerInstance() *WeChatServer {
	weChatServerOnce.Do(func() {
		weChatServerInstance = &WeChatServer{
			MchId:                viper.GetString("weChat.mchId"),
			PrivateKey:           viper.GetString("weChat.privateKey"),
			CertFile:             viper.GetString("weChat.certFile"),
			PrivateKeyFile:       viper.GetString("weChat.keyFile"),
			CertificateSerialNo:  viper.GetString("weChat.certificateSerialNo"),
			WechatPayPublicKeyId: viper.GetString("weChat.wechatPayPublicKeyId"),
			AppId:                viper.GetString("weChat.appId"),
			AppSecret:            viper.GetString("weChat.appSecret"),
			AppletId:             viper.GetString("weChat.appletId"),
			AppletKey:            viper.GetString("weChat.appletKey"),
		}
		weChatPublicKeyStr := utils.LoadPublicKeyWithPath(weChatServerInstance.CertFile)
		weChatServerInstance.PublicKeyInfo = weChatPublicKeyStr

		weChatPrivateKeyStr := utils.LoadPrivateKeyWithPath(weChatServerInstance.PrivateKeyFile)
		weChatServerInstance.PrivateKeyFileInfo = weChatPrivateKeyStr
	})
	return weChatServerInstance
}

// GetAliWapPay 获取支付宝手机网站支付
func (weChat *WeChatServer) WeChatJsPay(orderSn string, payMoney decimal.Decimal, notifyUrl string, boby string, openId string) string {
	// NewClientV3 初始化微信客户端 v3
	// mchid：商户ID 或者服务商模式的 sp_mchid
	// serialNo：商户证书的证书序列号
	// apiV3Key：apiV3Key，商户平台获取
	// privateKey：私钥 apiclient_key.pem 读取后的内容
	client, err := wechat.NewClientV3(weChat.MchId, weChat.CertificateSerialNo, weChat.PrivateKey, weChat.PrivateKeyFileInfo)
	if err != nil {
		zap.L().Error("微信支付NewClient failed", zap.Error(err))
	}
	// 微信支付公钥自动同步验签（新微信支付用户推荐）
	err = client.AutoVerifySignByPublicKey([]byte(weChat.PublicKeyInfo), weChat.WechatPayPublicKeyId)
	if err != nil {
		zap.L().Error("微信支付同步验签err", zap.Error(err))
		return ""
	}

	bm := make(gopay.BodyMap)
	bm.Set("appid", weChat.AppId).
		Set("description", boby).
		Set("out_trade_no", orderSn).
		Set("notify_url", notifyUrl).
		SetBodyMap("amount", func(bm gopay.BodyMap) {
			bm.Set("total", payMoney.Mul(decimal.NewFromInt(100)).IntPart()).
				Set("currency", "CNY")
		}).
		SetBodyMap("payer", func(bm gopay.BodyMap) {
			bm.Set("openid", openId)
		})

	wxRsp, err := client.V3TransactionJsapi(context.Background(), bm)
	fmt.Println(wxRsp)
	return ""
}