package apicrypt

import (
	"PaymentCenter/app/constants/errorcode"
	"PaymentCenter/app/models/appmodel"
	"PaymentCenter/app/utils/encrypt/rsa"
	"encoding/base64"
)

func NewRsa(app *appmodel.App) ApiCrypt {
	return &Rsa{
		App: app,
	}
}

func (r *Rsa) Encrypt(data string) (encryptData []byte, errCode int) {
	if r.App.MerchantPublicKey == "" {
		return nil, errorcode.AppRsaEncryptKeyNotFound
	}
	publicKeyPEM := `-----BEGIN PUBLIC KEY-----  
` + r.App.MerchantPublicKey + `  
-----END PUBLIC KEY-----`
	encryptByte, err := rsa.Encrypt(publicKeyPEM, data)
	if err != nil {
		return nil, errorcode.AppRsaEncryptFail
	}
	encryptData = []byte(base64.StdEncoding.EncodeToString(encryptByte))
	return
}

func (r *Rsa) Decrypt(encryptData string) (decryptData []byte, errCode int) {

	if r.App.PrivateKey == "" {
		return nil, errorcode.AppRsaDecryptKeyNotFound
	}
	privateKeyPEM := `-----BEGIN RSA PRIVATE KEY-----  
` + r.App.PrivateKey + `  
-----END RSA PRIVATE KEY-----`
	decryptData, err := rsa.Decrypt(privateKeyPEM, encryptData)
	if err != nil || decryptData == nil {
		return nil, errorcode.AppRsaDecryptFail
	}
	return
}