package utils

import (
	"io"
	"log"
	"os"
	"path/filepath"
)

func CopyFile(src, dst string) error {
	log.Printf("копирую %s в %s", src, dst)
	sourceFile, err := os.Open(src)
	if err != nil {
		return err
	}
	defer sourceFile.Close()

	// create destination folder if not exist
	if err = os.MkdirAll(filepath.Dir(dst), os.ModePerm); err != nil {
		return err
	}

	destinationFile, err := os.Create(dst)
	if err != nil {
		return err
	}
	defer destinationFile.Close()

	_, err = io.Copy(destinationFile, sourceFile)
	return err
}

// CopyDir recursively copies a directory tree
func CopyDir(src string, dst string) error {
	return filepath.Walk(src, func(path string, info os.FileInfo, err error) error {
		if err != nil {
			return err
		}

		// Construct new path
		relPath, err := filepath.Rel(src, path)
		if err != nil {
			return err
		}
		targetPath := filepath.Join(dst, relPath)

		if info.IsDir() {
			// create directory
			return os.MkdirAll(targetPath, info.Mode())
		} else {
			// copy file
			return CopyFile(path, targetPath)
		}
	})
}