package weixin

import (
	"context"
	"crypto/x509"
	"fmt"
	"github.com/wechatpay-apiv3/wechatpay-go/core"
	"github.com/wechatpay-apiv3/wechatpay-go/core/option"
	"github.com/wechatpay-apiv3/wechatpay-go/utils"
)

type Server struct {
	MchID                      string `json:"mch_id"`
	MchCertificateSerialNumber string `json:"mch_certificate_serial_number"`
	MchAPIv3Key                string `json:"mch_ap_iv_3_key"`
	PrivateKey                 string `json:"private_key"`
	PrivateKeyPath             string `json:"private_key_path"`
	CertificatePath            string `json:"certificate_path"`
}

func newClient(ctx context.Context, c *Server) (*core.Client, error) {
	mchPrivateKey, err := utils.LoadPrivateKeyWithPath(c.PrivateKeyPath)
	if err != nil {
		return nil, fmt.Errorf("MchID[%s] load merchant private key error:%v", c.MchID, err)
	}
	opts := []core.ClientOption{
		option.WithWechatPayAutoAuthCipher(c.MchID, c.MchCertificateSerialNumber, mchPrivateKey, c.MchAPIv3Key),
	}
	if c.CertificatePath != "" {
		payCert, err := utils.LoadCertificateWithPath(c.CertificatePath)
		if err != nil {
			return nil, fmt.Errorf("MchID[%s] load pay certificate error:%v", c.MchID, err)
		}
		opts = append(opts, option.WithWechatPayCertificate([]*x509.Certificate{payCert}))
	}
	client, err := core.NewClient(ctx, opts...)
	if err != nil {
		return nil, fmt.Errorf("MchID[%s] %v", c.MchID, err)
	}
	return client, nil
}