package virtbuf

// thank chatgpt for this because why. why write this if you can have it
// kick this out in 30 seconds

import (
	"errors"
	"fmt"
	"io"
	"os"
	"path/filepath"
)

func backupFiles(srcDir string, destDir string) error {
	// Create the destination directory
	err := os.MkdirAll(destDir, os.ModePerm)
	if err != nil {
		return errors.New(fmt.Sprintf("Failed to create directory: %v", err))
	}

	// Read the contents of the source directory
	entries, err := os.ReadDir(srcDir)
	if err != nil {
		return errors.New(fmt.Sprintf("Failed to read directory: %v", err))
	}

	// Iterate over the entries in the source directory
	for _, entry := range entries {
		// Skip directories and files that do not have the .test extension
		if entry.IsDir() || filepath.Ext(entry.Name()) != ".test" {
			continue
		}

		srcPath := filepath.Join(srcDir, entry.Name())
		destPath := filepath.Join(destDir, entry.Name())

		// Copy the file
		if err := copyFile(srcPath, destPath); err != nil {
			return errors.New(fmt.Sprintf("Failed to copy file %s: %v", entry.Name(), err))
		}
	}
	return nil
}

// copyFile copies a file from src to dest
func copyFile(src, dest string) error {
	srcFile, err := os.Open(src)
	if err != nil {
		return err
	}
	defer srcFile.Close()

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

	// Copy the content
	_, err = io.Copy(destFile, srcFile)
	return err
}