package encrypt

import (
	"voucher/internal/pkg/cmb/encrypt/encrypt_way/sm4"
	"voucher/internal/pkg/cmb/encrypt/errcode"
)

func NewSm4(app *AppEncrypt) ApiCrypt {
	return &SM4{
		App: app,
	}
}

func (r *SM4) Encrypt(data string) (encryptData []byte, err error) {
	if r.App.MerchantPublicKey == "" || r.App.PrivateKey == "" {
		return nil, errcode.AppKeyNotFound
	}
	encryptDataString, err := sm4.Sm4Encrypt(r.App.UniKEY, r.App.PrivateKey, r.App.MerchantPublicKey, data, "", true)
	if err != nil {
		return nil, errcode.AppEncryptFail
	}
	encryptData = []byte(encryptDataString)
	return
}

func (r *SM4) Decrypt(encryptData string) (decryptData []byte, err error) {
	defer func() {
		if e := recover(); e != nil {
			err = errcode.AppDecryptFail
		}
	}()
	if r.App.PrivateKey == "" || r.App.MerchantPublicKey == "" {
		return nil, errcode.AppKeyNotFound
	}

	decryptDataString, err := sm4.Sm4Decrypt(r.App.UniKEY, r.App.PrivateKey, r.App.MerchantPublicKey, encryptData, true)
	if err != nil {
		return nil, errcode.AppDecryptFail
	}
	decryptData = []byte(decryptDataString)
	return

}