package utils

import (
	"bytes"

	"github.com/anacrolix/torrent/metainfo"
)

func ConvertTorrentToMagnet(torrent []byte) (string, string, error) {
	minfo, err := metainfo.Load(bytes.NewReader(torrent))
	if err != nil {
		return "", "", err
	}
	info, err := minfo.UnmarshalInfo()
	if err != nil {
		return "", "", err
	}
	var size = uint64(info.Length)
	if size == 0 {
		for _, file := range info.Files {
			size += uint64(file.Length)
		}
	}
	magnet, err := minfo.MagnetV2()
	if err != nil {
		return "", "", err
	}
	return magnet.String(), BytesToSize(size), nil
}