package wechat

import (
	"context"
	"crypto/x509"
	"fmt"
	"github.com/go-playground/validator/v10"
	"github.com/wechatpay-apiv3/wechatpay-go/core"
	"github.com/wechatpay-apiv3/wechatpay-go/core/option"
	"github.com/wechatpay-apiv3/wechatpay-go/utils"
	"os"
	putils "plugins/utils/helper"
)

type Server struct {
	MchID                      string `validate:"required" json:"mch_id"`
	MchCertificateSerialNumber string `validate:"required" json:"mch_certificate_serial_number"`
}

func (c *Server) Validate() error {
	err := validator.New().Struct(c)
	if err != nil {
		for _, err = range err.(validator.ValidationErrors) {
			return fmt.Errorf("配置有误：" + err.Error())
		}
	}
	return nil
}

func newClient(ctx context.Context, c *Server) (*core.Client, error) {
	dir, err := os.Getwd()
	if err != nil {
		return nil, fmt.Errorf("MchID[%s] get current dir error:%v", c.MchID, err)
	}
	filePath := fmt.Sprintf("%s/%s/%s/%s", dir, "cert", "wechat", c.MchID)
	if !putils.FileExists(filePath) {
		return nil, fmt.Errorf("MchID[%s]微信密钥证书信息不存在,请联系技术人员处理", c.MchID)
	}
	// 商户相关配置,商户API私钥
	mchPrivateKey, err := utils.LoadPrivateKeyWithPath(fmt.Sprintf("%s/%s", filePath, "wechat_private_key.pem"))
	if err != nil {
		return nil, fmt.Errorf("MchID[%s] load merchant private key error:%v", c.MchID, err)
	}
	var client *core.Client
	// 微信支付平台配置
	wechatPayCertificate, err := utils.LoadCertificateWithPath(fmt.Sprintf("%s/%s", filePath, "wechat_cert.pem"))
	if err != nil {
		return nil, fmt.Errorf("平台证书有误：%v", err)
	}
	client, err = core.NewClient(
		ctx,
		option.WithMerchantCredential(
			c.MchID,
			c.MchCertificateSerialNumber,
			mchPrivateKey,
		),
		option.WithWechatPayCertificate([]*x509.Certificate{wechatPayCertificate}),
	)
	if err != nil {
		return nil, fmt.Errorf("创建 Client 失败：%v", err)
	}
	return client, nil
}