package compressor

import (
	"compress/gzip"
	"io"
	"os"
)

// CompressToFile uses gzip to compress data into a file
func CompressToFile(targetFile string, data []byte) error {
	f, err := os.Create(targetFile)
	if err != nil {
		return err
	}
	defer f.Close()

	// Create gzip writer.
	w := gzip.NewWriter(f)

	// Write bytes in compressed form to the file.
	_, err = w.Write(data)
	if err != nil {
		return err
	}

	// Close the file.
	return w.Close()
	// if err := w.Close(); err != nil {
	// 	return err
	// }

	// return nil
}

// ReadDecompressedContent returns the content of the de-compressed file
func ReadDecompressedContent(file string) ([]byte, error) {
	f, err := os.Open(file)
	if err != nil {
		return nil, err
	}
	defer f.Close()

	// Create new reader to decompress gzip.
	reader, err := gzip.NewReader(f)
	if err != nil {
		return nil, err
	}
	defer reader.Close()

	result, _ := io.ReadAll(reader)
	if err != nil {
		return nil, err
	}

	return result, nil
}

// ReadCompressedContent returns the content of the compressed file as is
func ReadCompressedContent(file string) ([]byte, error) {
	f, err := os.Open(file)
	if err != nil {
		return nil, err
	}
	defer f.Close()

	result, _ := io.ReadAll(f)
	if err != nil {
		return nil, err
	}

	return result, nil
}