package qubes

import (
	"fmt"
	"log"
	"strings"

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

type Qubes struct {
	NameSubstr string
	Relver     string
	URL        string
}

func (q Qubes) AddNewTorrents(transmissionbt *transmissionrpc.Client) error {
	// Set torrentURLs for Qubes OS
	q.URL = "https://mirrors.edge.kernel.org/qubes/iso/"
	respBody, err := common.GetResponse(q.URL)
	if err != nil {
		return err
	}

	// Get a goquery doc from response body
	doc, err := goquery.NewDocumentFromReader(respBody)
	if err != nil {
		return err
	}

	// Extract torrent URLs from web page contents
	var torrentURLs []string
	doc.Find("a").Each(func(i int, s *goquery.Selection) {
		if strings.Contains(s.Text(), q.Relver) && strings.Contains(s.Text(), "torrent") {
			torrentURLs = append(torrentURLs, fmt.Sprintf("%s/%s", q.URL, s.Text()))
		}
	})

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

	return nil
}