package http

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

	"github.com/debridmediamanager/zurg/internal/torrent"
	"go.uber.org/zap"
)

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, t *torrent.TorrentManager, log *zap.SugaredLogger) (*string, error) {
	torrents, ok := t.DirectoryMap.Get(directory)
	if !ok {
		return nil, fmt.Errorf("cannot find directory %s", directory)
	}

	if resp, ok := t.ResponseCache.Get(directory + ".html"); !ok {
		log.Debugf("Generating html for 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
	} else {
		htmlDoc := resp.(*string)
		return htmlDoc, nil
	}
}

func HandleListFiles(directory, torrentName string, t *torrent.TorrentManager, log *zap.SugaredLogger) (*string, error) {
	torrents, ok := t.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)
	}

	if resp, ok := t.ResponseCache.Get(directory + "/" + torrentName + ".html"); !ok {
		log.Debugf("Generating html for torrent %s", torrentName)
		htmlDoc := "<ol>"
		filenames := tor.SelectedFiles.Keys()
		sort.Strings(filenames)
		for _, filename := range filenames {
			file, _ := tor.SelectedFiles.Get(filename)
			if file == nil || !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
	} else {
		htmlDoc := resp.(*string)
		return htmlDoc, nil
	}
}