package dav

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

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

func HandleListDirectories(torMgr *torrent.TorrentManager) ([]byte, error) {
	davDoc := "<?xml version=\"1.0\" encoding=\"utf-8\"?><d:multistatus xmlns:d=\"DAV:\">"
	davDoc += dav.BaseDirectory("", "")
	directories := torMgr.DirectoryMap.Keys()
	sort.Strings(directories)
	for _, directory := range directories {
		if strings.HasPrefix(directory, "int__") {
			continue
		}
		davDoc += dav.Directory(directory, "")
	}
	davDoc += "</d:multistatus>"
	return []byte(davDoc), nil
}

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

	davDoc := "<?xml version=\"1.0\" encoding=\"utf-8\"?><d:multistatus xmlns:d=\"DAV:\">"
	davDoc += dav.Directory("", "")
	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 {
		davDoc += dav.Directory(tor.AccessKey, tor.LatestAdded)
	}
	davDoc += "</d:multistatus>"
	return []byte(davDoc), nil
}

func HandleListFiles(directory, torrentName string, torMgr *torrent.TorrentManager, log *logutil.Logger) ([]byte, 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)
	}

	davDoc := "<?xml version=\"1.0\" encoding=\"utf-8\"?><d:multistatus xmlns:d=\"DAV:\">" + dav.BaseDirectory(filepath.Join(directory, tor.AccessKey), tor.LatestAdded)
	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
		}
		davDoc += dav.File(filename, file.Bytes, file.Ended)
	}
	davDoc += "</d:multistatus>"
	return []byte(davDoc), nil
}

func HandlePropfindFile(directory, torrentName, fileName string, torMgr *torrent.TorrentManager, log *logutil.Logger) ([]byte, 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)
	}
	file, ok := tor.SelectedFiles.Get(fileName)
	if !ok || !strings.HasPrefix(file.Link, "http") {
		return nil, fmt.Errorf("cannot find file %s", fileName)
	}
	davDoc := "<?xml version=\"1.0\" encoding=\"utf-8\"?><d:multistatus xmlns:d=\"DAV:\">" + dav.BaseDirectory(filepath.Join(directory, tor.AccessKey), tor.LatestAdded)
	davDoc += dav.File(fileName, file.Bytes, file.Ended)
	davDoc += "</d:multistatus>"
	return []byte(davDoc), nil
}