app/static/js/main.js

// Common functionality

// Initialize on page load
document.addEventListener('DOMContentLoaded', () => {
    // Display recent videos in the footer on page load
    loadFooterRecentVideos();
    
    // Handle theme switching
    const themeItems = document.querySelectorAll('.theme-item');
    themeItems.forEach(item => {
        item.addEventListener('click', () => {
            const theme = item.dataset.theme;
            document.documentElement.setAttribute('data-theme', theme);
            localStorage.setItem('theme', theme);
        });
    });
    
    // Apply saved theme from localStorage if available
    const savedTheme = localStorage.getItem('theme');
    if (savedTheme) {
        document.documentElement.setAttribute('data-theme', savedTheme);
    }
    
    // Handle global search
    const searchButton = document.getElementById('global-search-button');
    const searchInput = document.getElementById('global-search');
    
    if (searchButton && searchInput) {
        searchButton.addEventListener('click', () => {
            handleGlobalSearch();
        });
        
        searchInput.addEventListener('keypress', (e) => {
            if (e.key === 'Enter') {
                handleGlobalSearch();
            }
        });
    }
});

// Format seconds to HH:MM:SS format
function formatTime(seconds) {
    const hours = Math.floor(seconds / 3600);
    const mins = Math.floor((seconds % 3600) / 60);
    const secs = Math.floor(seconds % 60);
    
    if (hours > 0) {
        return `${hours}:${mins.toString().padStart(2, '0')}:${secs.toString().padStart(2, '0')}`;
    } else {
        return `${mins}:${secs.toString().padStart(2, '0')}`;
    }
}

// Error handling function
function handleError(error) {
    console.error('Error:', error);
    return `<div role="alert" class="alert alert-error">
        <svg xmlns="http://www.w3.org/2000/svg" class="stroke-current shrink-0 h-6 w-6" fill="none" viewBox="0 0 24 24">
            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M10 14l2-2m0 0l2-2m-2 2l-2-2m2 2l2 2m7-2a9 9 0 11-18 0 9 9 0 0118 0z" />
        </svg>
        <span>Error: ${error.message || 'Something went wrong'}</span>
        <div>
            <button class="btn btn-sm btn-ghost" onclick="window.location.reload()">Retry</button>
        </div>
    </div>`;
}

// Toast notification function
function showToast(message, type = 'info') {
    const toast = document.createElement('div');
    toast.className = `alert alert-${type} fixed bottom-4 right-4 max-w-xs z-50 shadow-lg`;
    
    // Different icon based on type
    let icon = '';
    switch(type) {
        case 'success':
            icon = `<svg xmlns="http://www.w3.org/2000/svg" class="stroke-current shrink-0 h-6 w-6" fill="none" viewBox="0 0 24 24">
                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z" />
                </svg>`;
            break;
        case 'warning':
            icon = `<svg xmlns="http://www.w3.org/2000/svg" class="stroke-current shrink-0 h-6 w-6" fill="none" viewBox="0 0 24 24">
                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 9v2m0 4h.01m-6.938 4h13.856c1.54 0 2.502-1.667 1.732-3L13.732 4c-.77-1.333-2.694-1.333-3.464 0L3.34 16c-.77 1.333.192 3 1.732 3z" />
                </svg>`;
            break;
        case 'error':
            icon = `<svg xmlns="http://www.w3.org/2000/svg" class="stroke-current shrink-0 h-6 w-6" fill="none" viewBox="0 0 24 24">
                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M10 14l2-2m0 0l2-2m-2 2l-2-2m2 2l2 2m7-2a9 9 0 11-18 0 9 9 0 0118 0z" />
                </svg>`;
            break;
        default: // info
            icon = `<svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" class="stroke-current shrink-0 w-6 h-6">
                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M13 16h-1v-4h-1m1-4h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z"></path>
                </svg>`;
    }
    
    toast.innerHTML = `
        ${icon}
        <span>${message}</span>
        <div>
            <button class="btn btn-sm btn-ghost" onclick="this.parentElement.parentElement.remove()">
                <svg xmlns="http://www.w3.org/2000/svg" class="h-4 w-4" fill="none" viewBox="0 0 24 24" stroke="currentColor">
                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12" />
                </svg>
            </button>
        </div>
    `;
    document.body.appendChild(toast);
    
    // Auto-dismiss after 3 seconds
    setTimeout(() => {
        toast.classList.add('opacity-0', 'transition-opacity', 'duration-500');
        setTimeout(() => toast.remove(), 500);
    }, 3000);
}

// Extract video ID from YouTube URL
function extractVideoId(url) {
    const regExp = /^.*((youtu.be\/)|(v\/)|(\/u\/\w\/)|(embed\/)|(watch\?))\??v?=?([^#&?]*).*/;
    const match = url.match(regExp);
    return (match && match[7].length === 11) ? match[7] : null;
}

// Handle global search
function handleGlobalSearch() {
    const searchInput = document.getElementById('global-search');
    const searchTerm = searchInput.value.trim();
    
    if (searchTerm) {
        // Get modal elements
        const searchModal = document.getElementById('search-results-modal');
        const searchResultsContainer = document.getElementById('search-results-container');
        const modalTitle = searchModal.querySelector('h3');
        
        // Update modal title with search term
        modalTitle.textContent = `Search Results for "${searchTerm}"`;
        
        // Show the modal
        searchModal.showModal();
        
        // Clear previous results and show loading state
        searchResultsContainer.innerHTML = `
            <div class="flex justify-center items-center p-4">
                <span class="loading loading-spinner loading-md"></span>
                <span class="ml-2">Searching...</span>
            </div>
        `;
        
        // Fetch search results from API
        fetch(`/api/video/search?query=${encodeURIComponent(searchTerm)}&limit=10`)
            .then(response => {
                if (!response.ok) {
                    throw new Error('Failed to perform search');
                }
                return response.json();
            })
            .then(results => {
                if (results && results.length > 0) {
                    // Group results by video
                    const videoGroups = {};
                    // First pass: collect all video IDs that need titles
                    const videoIds = [];
                    results.forEach(result => {
                        const videoId = result.segment.video_id;
                        if (!videoGroups[videoId]) {
                            videoGroups[videoId] = {
                                videoId: videoId,
                                title: `Video ${videoId}`,  // Default title, will be updated
                                segments: []
                            };
                            // Add to list of IDs to fetch titles for
                            videoIds.push(videoId);
                        }
                        videoGroups[videoId].segments.push(result);
                    });
                    
                    // If we have video IDs, fetch their proper titles
                    const videoPromises = videoIds.map(videoId => {
                        return fetch(`/api/video/info/${videoId}`)
                            .then(response => response.ok ? response.json() : null)
                            .then(videoInfo => {
                                if (videoInfo && videoInfo.title && videoGroups[videoId]) {
                                    videoGroups[videoId].title = videoInfo.title;
                                }
                            })
                            .catch(error => console.error(`Error fetching video info for ${videoId}:`, error));
                    });
                    
                    // After all video titles are fetched, continue with rendering
                    Promise.all(videoPromises).then(() => {
                        // Generate results HTML
                        const resultsHTML = Object.values(videoGroups).map(group => {
                            const segmentsHTML = group.segments.map(result => {
                                return `
                                    <a href="/video/${group.videoId}?t=${Math.floor(result.segment.start)}" 
                                       class="block p-2 hover:bg-base-200 rounded-md transition-colors duration-150 mb-2">
                                        <div class="flex items-start">
                                            <div class="text-primary font-mono mr-2">${formatTime(result.segment.start)}</div>
                                            <div class="flex-grow">
                                                <p class="truncate-3-lines">${result.segment.text}</p>
                                                <div class="text-xs opacity-70 mt-1">Score: ${(result.score * 100).toFixed(1)}%</div>
                                            </div>
                                        </div>
                                    </a>
                                `;
                            }).join('');
                            
                            return `
                                <div class="mb-6">
                                    <div class="flex items-center mb-2">
                                        <img src="https://img.youtube.com/vi/${group.videoId}/default.jpg" alt="Thumbnail" 
                                             class="w-12 h-12 rounded-md mr-2">
                                        <h3 class="text-lg font-bold">
                                            <a href="/video/${group.videoId}" class="link">${group.title}</a>
                                        </h3>
                                    </div>
                                    <div class="pl-4 border-l-2 border-primary">
                                        ${segmentsHTML}
                                    </div>
                                </div>
                            `;
                        }).join('');
                        
                        // Update search results container
                        searchResultsContainer.innerHTML = resultsHTML;
                    });
                } else {
                    // No results found - display immediately, no need to wait for titles
                    searchResultsContainer.innerHTML = `
                        <div class="alert alert-info">
                            <svg xmlns="http://www.w3.org/2000/svg" class="stroke-current shrink-0 h-6 w-6" fill="none" viewBox="0 0 24 24">
                                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M13 16h-1v-4h-1m1-4h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z" />
                            </svg>
                            <span>No results found. Try a different search term or process more videos.</span>
                        </div>
                    `;
                }
            })
            .catch(error => {
                console.error('Search error:', error);
                searchResultsContainer.innerHTML = `
                    <div class="alert alert-error">
                        <svg xmlns="http://www.w3.org/2000/svg" class="stroke-current shrink-0 h-6 w-6" fill="none" viewBox="0 0 24 24">
                            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M10 14l2-2m0 0l2-2m-2 2l-2-2m2 2l2 2m7-2a9 9 0 11-18 0 9 9 0 0118 0z" />
                        </svg>
                        <span>Error performing search: ${error.message}</span>
                    </div>
                `;
            });
    } else {
        // Show notification if search is empty
        showToast('Please enter a search term', 'warning');
    }
}

// Load recent videos into the footer from the API
function loadFooterRecentVideos() {
    const footerRecentVideos = document.getElementById('footer-recent-videos');
    if (!footerRecentVideos) return;
    
    // Show loading state
    footerRecentVideos.innerHTML = '<p class="text-sm opacity-70">Loading recent videos...</p>';
    
    // Fetch recent videos from server API
    fetch('/api/video/recent?limit=3')
        .then(response => {
            if (!response.ok) {
                throw new Error('Failed to fetch recent videos');
            }
            return response.json();
        })
        .then(videos => {
            if (videos && videos.length > 0) {
                // Generate HTML for recent videos
                const videoLinks = videos.map(video => {
                    return `
                        <a href="/video/${video.video_id}" class="link link-hover block py-1 truncate">
                            <span class="text-xs text-primary">▶</span> ${video.title || `Video ${video.video_id}`}
                        </a>
                    `;
                }).join('');
                
                // Add videos to the footer
                footerRecentVideos.innerHTML = videoLinks;
            } else {
                footerRecentVideos.innerHTML = '<p class="text-sm opacity-70">No recent videos</p>';
            }
        })
        .catch(error => {
            console.error('Error loading footer videos:', error);
            footerRecentVideos.innerHTML = '<p class="text-sm opacity-70">Failed to load recent videos</p>';
        });
}