package torrent

type LibraryState struct {
	TotalCount           int
	ActiveCount          int
	FirstActiveTorrentId string
	FirstTorrentId       string
}

func (ls *LibraryState) Eq(a LibraryState) bool {
	if ls.TotalCount == 0 || ls.FirstActiveTorrentId == "" || ls.FirstTorrentId == "" {
		return false
	}
	return a.TotalCount == ls.TotalCount && a.ActiveCount == ls.ActiveCount && a.FirstActiveTorrentId == ls.FirstActiveTorrentId && a.FirstTorrentId == ls.FirstTorrentId
}

func (t *TorrentManager) setNewLatestState(checksum LibraryState) {
	t.latestState.ActiveCount = checksum.ActiveCount
	t.latestState.TotalCount = checksum.TotalCount
	t.latestState.FirstActiveTorrentId = checksum.FirstActiveTorrentId
	t.latestState.FirstTorrentId = checksum.FirstTorrentId
}

// generates a checksum based on the number of torrents, the first torrent id and the number of active torrents
func (t *TorrentManager) getCurrentState() LibraryState {
	var state LibraryState

	activeTorrents, _, err := t.Api.GetTorrents(1, true)
	if err != nil {
		t.log.Errorf("Checksum API Error (GetActiveTorrents): %v", err)
		return LibraryState{}
	}
	if len(activeTorrents) > 0 {
		state.FirstActiveTorrentId = activeTorrents[0].ID
	}

	torrents, totalCount, err := t.Api.GetTorrents(1, true)
	if err != nil {
		t.log.Errorf("Checksum API Error (GetTorrents): %v", err)
		return LibraryState{}
	}
	state.TotalCount = totalCount
	if len(torrents) > 0 {
		state.FirstTorrentId = torrents[0].ID
	}

	count, err := t.Api.GetActiveTorrentCount()
	if err != nil {
		t.log.Errorf("Checksum API Error (GetActiveTorrentCount): %v", err)
		return LibraryState{}
	}
	state.ActiveCount = count.DownloadingCount

	return state
}