package rocky

import (
	"fmt"
	"log"
	"regexp"
	"strings"

	"github.com/hekmon/transmissionrpc"
	"tildegit.org/hyperreal/go-torrent-helper/common"
)

type Rocky struct {
	NameSubstr string
	Relver     string
	URL        string
}

func (r Rocky) AddNewTorrents(transmissionbt *transmissionrpc.Client) error {
	// Set torrentURLs for Rocky Linux mirror
	archs := []string{"aarch64", "ppc64le", "s390x", "x86_64"}
	var torrentURLs []string

	for _, arch := range archs {
		r.URL = fmt.Sprintf("https://download.rockylinux.org/pub/rocky/%s/isos/%s/", r.Relver, arch)
		dataInBytes, err := common.GetResponse(r.URL)
		if err != nil {
			return err
		}

		bodyText := string(dataInBytes)

		// Extract torrent URLs from web page contents
		re := regexp.MustCompile(`(http|ftp|https):\/\/([\w_-]+(?:(?:\.[\w_-]+)+))([\w.,@?^=%&:\/~+#-]*[\w@?^=%&\/~+#-])`)
		match := re.FindAllString(bodyText, 1000)
		for _, v := range match {
			if strings.Contains(v, ".torrent") {
				torrentURLs = append(torrentURLs, v)
			}
		}
	}

	// Add torrents to Transmission instance
	for _, torrentURL := range torrentURLs {
		torrent, err := transmissionbt.TorrentAdd(&transmissionrpc.TorrentAddPayload{
			Filename: &torrentURL,
		})
		if err != nil {
			return err
		}

		log.Printf("%s added\n", *torrent.Name)
	}

	return nil
}

func (r Rocky) RemoveOldTorrents(transmissionbt *transmissionrpc.Client) error {
	if err := common.RemoveTorrents(r.NameSubstr, r.Relver, transmissionbt); err != nil {
		return err
	}

	return nil
}