package cmd

import (
	"bytes"
	"encoding/base64"
	"encoding/json"
	"fmt"
	"log"
	"os"
	"os/exec"
	"path/filepath"
	"qteam/app/utils/postbank/smtypes"
)

func DeCrypt(merchantId string, priKey string, sopPublicKey string, input *smtypes.RequestData) ([]byte, error) {
	// 解密逻辑
	requestJson, err := json.Marshal(input)
	if err != nil {
		return nil, fmt.Errorf("请求体json编码失败：%s", err)
	}
	path, err := smv2()
	if err != nil {
		return nil, fmt.Errorf("解码获取当前目录失败：%s", err)
	}
	cmd := fmt.Sprintf("%s postbank decrypt --merchantId=\"%s\" --priKey=\"%s\" --sopPublicKey=\"%s\" --input=\"%s\" %s 2>&1",
		path, merchantId, priKey, sopPublicKey, base64.StdEncoding.EncodeToString(requestJson), "--isRequest")
	// 返回解密后的数据
	return toExec(cmd), nil
}

func smv2() (string, error) {
	path, err := os.Getwd()
	if err != nil {
		return "", err
	}
	return fmt.Sprintf("%s/%s/smv2", filepath.Dir(filepath.Dir(path)), "untils/sm"), nil
}

func toExec(cmdString string) []byte {
	var stdoutBuf, stderrBuf bytes.Buffer
	cmd := exec.Command(cmdString)
	cmd.Stdout = &stdoutBuf
	cmd.Stderr = &stderrBuf
	err := cmd.Run()
	if err != nil {
		log.Fatalf("cmd.Run() failed with %s\n", err)
	}
	fmt.Printf("stdout: %s\nstderr: %s\n", stdoutBuf.String(), stderrBuf.String())
	return stdoutBuf.Bytes()
}