package fedora

import (
	"fmt"
	"io/ioutil"
	"log"
	"regexp"
	"strings"

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

type Fedora struct {
	NameSubstr string
	Relver     string
	URL        string
}

func (f Fedora) AddNewTorrents(transmissionbt *transmissionrpc.Client) error {
	// Send HTTP GET request and receive response
	f.URL = "https://torrent.fedoraproject.org/"
	torrentSubstr := fmt.Sprintf("%s.torrent", f.Relver)
	respBody, err := common.GetResponse(f.URL)
	if err != nil {
		return err
	}

	dataInBytes, err := ioutil.ReadAll(respBody)
	if err != nil {
		return fmt.Errorf("Error reading response body: %s\n", err)
	}

	bodyText := string(dataInBytes)

	// Extract torrent URLs from web page contents
	var torrentURLs []string
	re := regexp.MustCompile(`(http|ftp|https):\/\/([\w_-]+(?:(?:\.[\w_-]+)+))([\w.,@?^=%&:\/~+#-]*[\w@?^=%&\/~+#-])`)
	match := re.FindAllString(bodyText, 1000)
	for _, v := range match {
		if strings.Contains(v, torrentSubstr) {
			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 (f Fedora) RemoveOldTorrents(transmissionbt *transmissionrpc.Client) error {
	if err := common.RemoveTorrents(f.NameSubstr, f.Relver, transmissionbt); err != nil {
		return err
	}

	return nil
}