function sortVideos() {
        videos.sort((a, b) => b.likes - a.likes);
        displayVideos();
    }

    function likeVideo(index) {
        videos[index].likes++;
        localStorage.setItem('videos', JSON.stringify(videos));
        displayVideos();
    }

    function dislikeVideo(index) {
        videos[index].dislikes++;
        localStorage.setItem('videos', JSON.stringify(videos));
        displayVideos();
    }

    function commentVideo(index) {
        const commentInput = document.getElementById(`comment-input-${index}`);
        if (commentInput.style.display === 'none' || commentInput.style.display === '') {
            commentInput.style.display = 'block';
        } else {
            commentInput.style.display = 'none';
        }
    }

    function addComment(index) {
        const commentText = document.getElementById(`comment-input-${index}`).value.trim();
        if (commentText) {
            videos[index].comments.push({ text: commentText, user: tempUser ? tempUser.nick : 'Гость' });
            localStorage.setItem('videos', JSON.stringify(videos));
            displayComments(index);
            document.getElementById(`comment-input-${index}`).value = '';
        }
    }

    function displayComments(index) {
        const commentsContainer = document.getElementById(`comments-${index}`);
        commentsContainer.innerHTML = '';
        videos[index].comments.forEach((comment) => {
            const commentItem = document.createElement('p');
            commentItem.textContent = `${comment.user}: ${comment.text}`;
            commentsContainer.appendChild(commentItem);
        });
    }

    function deleteVideo(index) {
        videos.splice(index, 1);
        localStorage.setItem('videos', JSON.stringify(videos));
        displayVideos();
    }

    function editVideo(index) {
        const newTitle = prompt('Введите новое название видео:', videos[index].title);
        if (newTitle) {
            videos[index].title = newTitle;
            localStorage.setItem('videos', JSON.stringify(videos));
            displayVideos();
        }
    }

    function createChannel() {
        const channelName = document.getElementById('channel-name').value.trim();
        if (!channelName) {
            alert('Пожалуйста, введите название канала.');
            return;
        }
        if (channels.find(channel => channel.name === channelName)) {
            alert('Канал с таким названием уже существует.');
            return;
        }

        const newChannel = {
            name: channelName,
            user: tempUser ? tempUser.nick : 'Гость',
            videos: []
        };

        channels.push(newChannel);
        localStorage.setItem('channels', JSON.stringify(channels));
        displayChannelInfo(newChannel);
        document.getElementById('channel-name').value = '';
    }

    function displayChannelInfo(channel) {
        const channelInfo = document.getElementById('channel-info');
        channelInfo.textContent = `Канал "${channel.name}" создан. Пользователь: ${channel.user}.`;
    }

    function showAllVideos() {
        displayVideos();
    }

    document.addEventListener('DOMContentLoaded', displayVideos);
</script>