package archiver

import (
	"os"
	"path/filepath"
)

func NewErrorOnlyArchiver(conf *Config) func(string, error) {
	return func(filePath string, archiveErr error) {
		if archiveErr != nil {
			err := writeErrorFile(conf, filePath, archiveErr)
			logger.Error(err)
		}
	}
}

func writeErrorFile(conf *Config, filePath string, archiveErr error) error {
	if archiveErr != nil {
		baseName := filepath.Base(filePath)

		destFolder := getDestFolder(conf, ErrorFolder)
		globDir := extractGlobbedDir(conf.Folder, filePath)
		if globDir != "" {
			destFolder = filepath.Join(destFolder, globDir)
		}

		err := os.MkdirAll(destFolder, os.ModePerm)
		if err != nil {
			return err
		}

		f, err := os.OpenFile(filepath.Join(destFolder, baseName+".err"), os.O_WRONLY|os.O_CREATE|os.O_APPEND, os.ModePerm)
		if err != nil {
			return err
		}
		defer f.Close()
		_, err = f.Write([]byte(archiveErr.Error() + "\n"))
		if err != nil {
			return err
		}
	}
	return nil
}