package http

import (
	"fmt"
	"net/url"
	"path/filepath"
	"sort"
	"strings"

	"github.com/debridmediamanager/zurg/internal/torrent"
	"github.com/debridmediamanager/zurg/pkg/logutil"
)

func HandleListDirectories(torMgr *torrent.TorrentManager) (*string, error) {
	htmlDoc := "<ol>"
	directories := torMgr.DirectoryMap.Keys()
	sort.Strings(directories)
	for _, directory := range directories {
		if strings.HasPrefix(directory, "int__") {
			continue
		}
		directoryPath := url.PathEscape(directory)
		htmlDoc += fmt.Sprintf("<li><a href=\"/http/%s/\">%s</a></li>", directoryPath, directory)
	}

	return &htmlDoc, nil
}

func HandleListTorrents(directory string, torMgr *torrent.TorrentManager, log *logutil.Logger) (*string, error) {
	torrents, ok := torMgr.DirectoryMap.Get(directory)
	if !ok {
		return nil, fmt.Errorf("cannot find directory %s", directory)
	}

	htmlDoc := "<ol>"
	var allTorrents []*torrent.Torrent
	torrents.IterCb(func(_ string, tor *torrent.Torrent) {
		if tor.AllInProgress() {
			return
		}
		allTorrents = append(allTorrents, tor)
	})
	sort.Slice(allTorrents, func(i, j int) bool {
		return allTorrents[i].AccessKey < allTorrents[j].AccessKey
	})
	for _, tor := range allTorrents {
		htmlDoc = htmlDoc + fmt.Sprintf("<li><a href=\"/http/%s/\">%s</a></li>", filepath.Join(directory, url.PathEscape(tor.AccessKey)), tor.AccessKey)
	}
	return &htmlDoc, nil
}

func HandleListFiles(directory, torrentName string, torMgr *torrent.TorrentManager, log *logutil.Logger) (*string, error) {
	torrents, ok := torMgr.DirectoryMap.Get(directory)
	if !ok {
		return nil, fmt.Errorf("cannot find directory %s", directory)
	}
	tor, ok := torrents.Get(torrentName)
	if !ok {
		return nil, fmt.Errorf("cannot find torrent %s", torrentName)
	}

	htmlDoc := "<ol>"
	filenames := tor.SelectedFiles.Keys()
	sort.Strings(filenames)
	for _, filename := range filenames {
		file, ok := tor.SelectedFiles.Get(filename)
		if !ok || !strings.HasPrefix(file.Link, "http") {
			continue
		}
		filePath := filepath.Join(directory, torrentName, url.PathEscape(filename))
		htmlDoc += fmt.Sprintf("<li><a href=\"/http/%s\">%s</a></li>", filePath, filename)
	}
	return &htmlDoc, nil
}