package paymentService

import (
	"PaymentCenter/app/third/paymentService/payCommon"
	"context"
	"errors"
	"fmt"
	"github.com/go-pay/gopay"
	"github.com/go-pay/gopay/alipay"
	"strconv"
	"sync"
)

var (
	aliClient    *alipay.Client
	aliClientErr error
	aliOnce      sync.Once
)

// AliInitClient 使用提供的支付请求参数初始化支付宝客户端
func AliInitClient(aliConfig AliPay) {
	aliOnce.Do(func() {
		// 初始化支付宝客户端
		// appid：应用ID
		// privateKey：应用私钥，支持PKCS1和PKCS8
		// isProd：是否是正式环境，沙箱环境请选择新版沙箱应用。
		aliClient, aliClientErr = alipay.NewClient(aliConfig.AppId, aliConfig.PrivateKey, true)
	})
	// 自定义配置http请求接收返回结果body大小，默认 10MB
	aliClient.SetBodySize(10) // 没有特殊需求，可忽略此配置

	// 打开Debug开关，输出日志，默认关闭
	aliClient.DebugSwitch = gopay.DebugOn

	// 设置支付宝请求 公共参数
	//    注意：具体设置哪些参数，根据不同的方法而不同，此处列举出所有设置参数
	aliClient.SetLocation(alipay.LocationShanghai). // 设置时区，不设置或出错均为默认服务器时间
							SetCharset(alipay.UTF8). // 设置字符编码，不设置默认 utf-8
							SetSignType(alipay.RSA2) // 设置签名类型，不设置默认 RSA2

	// 自动同步验签（只支持证书模式）
	// 传入 alipayPublicCert.crt 内容
	aliClient.AutoVerifySign(aliConfig.AlipayPublicCert)

	// 证书内容
	aliClientErr = aliClient.SetCertSnByContent(aliConfig.AppPublicCert, aliConfig.AlipayRootCert, aliConfig.AlipayPublicCert)
}

// GetAliClient 获取已经初始化的支付宝客户端
func GetAliClient() (*alipay.Client, error) {
	if aliClient == nil {
		return nil, errors.New("client not initialized")
	}
	if aliClientErr != nil {
		return nil, aliClientErr
	}
	return aliClient, nil
}

// ALiH5PayInfo 支付宝手机网站支付
func ALiH5PayInfo(c context.Context, payOrderRequest PayOrderRequest) (string, error) {
	// 初始化支付宝客户端
	AliInitClient(payOrderRequest.Ali)

	// 获取支付宝客户端
	aliClient, err := GetAliClient()
	if err != nil {
		fmt.Println("Failed to get client:", err)
		return "", err
	}
	// 初始化 BodyMap
	amount := float64(payOrderRequest.Amount) / 100.0

	bm := make(gopay.BodyMap)
	bm.Set("out_trade_no", payOrderRequest.OrderId).
		Set("total_amount", amount).
		Set("subject", payOrderRequest.Description).
		Set("notify_url", payCommon.ALI_NOTIFY_URL)

	aliRsp, err := aliClient.TradeWapPay(c, bm)
	if err != nil {
		if bizErr, ok := alipay.IsBizError(err); ok {
			return "", bizErr
		}
		return "", err
	}
	return aliRsp, nil
}

// ALiOrderQuery 查询支付宝订单
func ALiOrderQuery(ctx context.Context, aliConfig AliPay, OrderNo string) (PayOrderQueryInfo, error) {
	// 初始化支付宝客户端
	AliInitClient(aliConfig)

	// 获取支付宝客户端
	aliClient, err := GetAliClient()
	if err != nil {
		fmt.Println("Failed to get client:", err)
		return PayOrderQueryInfo{}, err
	}
	// 请求参数
	bm := make(gopay.BodyMap)
	bm.Set("out_trade_no", OrderNo)

	// 查询订单
	aliRsp, err := aliClient.TradeQuery(ctx, bm)
	if err != nil {
		if bizErr, ok := alipay.IsBizError(err); ok {
			return PayOrderQueryInfo{}, bizErr
		}
		return PayOrderQueryInfo{}, err
	}
	// 同步返回验签
	ok, err := alipay.VerifySyncSignWithCert(aliConfig.AlipayPublicCert, aliRsp.SignData, aliRsp.Sign)
	if err != nil || !ok {
		return PayOrderQueryInfo{}, errors.New(fmt.Sprintf("验签失败,失败原因：%s", err.Error()))
	}

	//	映射交易状态
	tradeState := ""
	tradeStateDesc := ""
	switch aliRsp.Response.TradeStatus {
	case "TRADE_SUCCESS":
		tradeState = "SUCCESS"
		tradeStateDesc = "交易支付成功"
	case "REFUND":
		tradeState = "REFUND"
	case "WAIT_BUYER_PAY":
		tradeState = "NOTPAY"
		tradeStateDesc = "交易创建，等待买家付款"
	case "TRADE_CLOSED":
		tradeState = "CLOSED"
		tradeStateDesc = "未付款交易超时关闭，或支付完成后全额退款"
	}

	amountTotal, _ := strconv.Atoi(aliRsp.Response.TotalAmount)
	payerTotal, _ := strconv.Atoi(aliRsp.Response.BuyerPayAmount)
	//	构建数据
	return PayOrderQueryInfo{
		AppId:          aliConfig.AppId,
		OutTradeNo:     aliRsp.Response.OutTradeNo,
		TransactionId:  aliRsp.Response.TradeNo,
		TradeState:     tradeState,
		TradeStateDesc: tradeStateDesc,
		SuccessTime:    aliRsp.Response.SendPayDate,
		AmountTotal:    int64(amountTotal * 100),
		PayerTotal:     int64(payerTotal * 100),
	}, nil
}