package main

import (
	"context"
	"github.com/wechatpay-apiv3/wechatpay-go/core"
	"github.com/wechatpay-apiv3/wechatpay-go/core/option"
	"github.com/wechatpay-apiv3/wechatpay-go/services/payments/jsapi"
	"github.com/wechatpay-apiv3/wechatpay-go/services/payments/native"
	"github.com/wechatpay-apiv3/wechatpay-go/utils"
	"log"
)

func main() {
	var (
		mchID                      string = "190000****"                               // 商户号
		mchCertificateSerialNumber string = "3775B6A45ACD588826D15E583A95F5DD********" // 商户证书序列号
		mchAPIv3Key                string = "2ab9****************************"         // 商户APIv3密钥
	)
	// 使用 utils 提供的函数从本地文件中加载商户私钥，商户私钥会用来生成请求的签名
	mchPrivateKey, err := utils.LoadPrivateKeyWithPath("/path/to/merchant/apiclient_key.pem")
	if err != nil {
		log.Fatal("load merchant private key error")
	}
	ctx := context.Background()
	// 使用商户私钥等初始化 client，并使它具有自动定时获取微信支付平台证书的能力
	opts := []core.ClientOption{
		option.WithWechatPayAutoAuthCipher(mchID, mchCertificateSerialNumber, mchPrivateKey, mchAPIv3Key),
	}
	client, err := core.NewClient(ctx, opts...)
	if err != nil {
		log.Fatalf("new wechat pay client err:%s", err)
	}
	// 以 Native 支付为例
	svc := native.NativeApiService{Client: client}
	// 发送请求
	resp, result, err := svc.Prepay(ctx,
		native.PrepayRequest{
			Appid:       core.String("wxd678efh567hg6787"),
			Mchid:       core.String("1900009191"),
			Description: core.String("Image形象店-深圳腾大-QQ公仔"),
			OutTradeNo:  core.String("1217752501201407033233368018"),
			Attach:      core.String("自定义数据说明"),
			NotifyUrl:   core.String("https://www.weixin.qq.com/wxpay/pay.php"),
			Amount: &native.Amount{
				Total: core.Int64(100),
			},
		},
	)

	// 使用微信扫描 resp.code_url 对应的二维码，即可体验Native支付
	log.Printf("status=%d resp=%s", result.Response.StatusCode, resp)
	svc1 := jsapi.JsapiApiService{Client: client}
	// 得到prepay_id，以及调起支付所需的参数和签名
	resp1, result, err := svc1.PrepayWithRequestPayment(ctx,
		jsapi.PrepayRequest{
			Appid:       core.String("wxd678efh567hg6787"),
			Mchid:       core.String("1900009191"),
			Description: core.String("Image形象店-深圳腾大-QQ公仔"),
			OutTradeNo:  core.String("1217752501201407033233368018"),
			Attach:      core.String("自定义数据说明"),
			NotifyUrl:   core.String("https://www.weixin.qq.com/wxpay/pay.php"),
			Amount: &jsapi.Amount{
				Total: core.Int64(100),
			},
			Payer: &jsapi.Payer{
				Openid: core.String("oUpF8uMuAJO_M2pxb1Q9zNjWeS6o"),
			},
		},
	)

	// 使用微信扫描 resp.code_url 对应的二维码，即可体验Native支付
	log.Printf("status=%d resp=%s", result.Response.StatusCode, resp1)
}