package sandbox

import (
	"encoding/base64"
	"encoding/json"
	"os"
)

// NativeCommand encodes a native sandbox helper invocation.
func NativeCommand(cfg *Config, originalCmd []string, cwd string, env map[string]string) ([]string, error) {
	envCopy := make(map[string]string, len(env))
	for k, v := range env {
		envCopy[k] = v
	}
	data, err := json.Marshal(helperPolicy{Config: *cfg, CWD: cwd, Env: envCopy, Command: originalCmd})
	if err != nil {
		return nil, err
	}
	exe, err := os.Executable()
	if err != nil {
		return nil, err
	}
	return []string{exe, "sandbox-exec", base64.RawStdEncoding.EncodeToString(data)}, nil
}

// pathExists checks if a file or directory exists
func pathExists(path string) bool {
	_, err := os.Stat(path)
	return err == nil
}