// Art Gallery Data
const artworks = [
    {
        id: 1,
        title: "Cyberpunk City Nights",
        artist: "NeonDreamer",
        category: "digital",
        image: "https://static.photos/technology/640x480/1",
        avatar: "https://static.photos/people/200x200/1",
        likes: 2453,
        views: "12.5K",
        comments: 89,
        description: "A futuristic cityscape inspired by Blade Runner and cyberpunk aesthetics. Created in Blender and Photoshop over 3 weeks.",
        tags: ["cyberpunk", "cityscape", "digital", "scifi"]
    },
    {
        id: 2,
        title: "Ethereal Forest Spirit",
        artist: "MysticArt",
        category: "digital",
        image: "https://static.photos/nature/640x360/2",
        avatar: "https://static.photos/people/200x200/2",
        likes: 1892,
        views: "8.2K",
        comments: 56,
        description: "Digital painting of an ancient forest guardian. Exploring light and atmosphere in fantasy environments.",
        tags: ["fantasy", "forest", "spirit", "digitalpainting"]
    },
    {
        id: 3,
        title: "Portrait Study #42",
        artist: "ArtStudent_99",
        category: "traditional",
        image: "https://static.photos/people/640x480/3",
        avatar: "https://static.photos/people/200x200/3",
        likes: 567,
        views: "2.1K",
        comments: 23,
        description: "Oil on canvas. 40x50cm. Working on skin tones and lighting from natural window light.",
        tags: ["oilpainting", "portrait", "traditional", "study"]
    },
    {
        id: 4,
        title: "Abstract Emotions",
        artist: "ColorSplash",
        category: "digital",
        image: "https://static.photos/abstract/640x360/4",
        avatar: "https://static.photos/people/200x200/4",
        likes: 3201,
        views: "15K",
        comments: 134,
        description: "Exploring the relationship between color and emotion. Digital abstract composition using custom brushes.",
        tags: ["abstract", "colors", "emotional", "digital"]
    },
    {
        id: 5,
        title: "Mountain Mist",
        artist: "NatureLens",
        category: "photography",
        image: "https://static.photos/nature/640x480/5",
        avatar: "https://static.photos/people/200x200/5",
        likes: 892,
        views: "4.5K",
        comments: 45,
        description: "Early morning shot in the Alps. Sony A7III with 24-70mm lens. f/8, 1/125s, ISO 100.",
        tags: ["photography", "landscape", "mountains", "nature"]
    },
    {
        id: 6,
        title: "Mecha Warrior",
        artist: "RobotDesigner",
        category: "3d",
        image: "https://static.photos/technology/640x360/6",
        avatar: "https://static.photos/people/200x200/6",
        likes: 4521,
        views: "22K",
        comments: 201,
        description: "Hard surface modeling practice. Rendered in Octane. Concept inspired by Gundam and Pacific Rim.",
        tags: ["3d", "mecha", "robot", "scifi", "blender"]
    },
    {
        id: 7,
        title: "Cherry Blossom Dreams",
        artist: "SakuraArtist",
        category: "anime",
        image: "https://static.photos/nature/640x480/7",
        avatar: "https://static.photos/people/200x200/7",
        likes: 5678,
        views: "28K",
        comments: 312,
        description: "Original character illustration. Clip Studio Paint. Focusing on soft lighting and spring atmosphere.",
        tags: ["anime", "manga", "illustration", "sakura"]
    },
    {
        id: 8,
        title: "Urban Decay",
        artist: "StreetWalker",
        category: "photography",
        image: "https://static.photos/cityscape/640x360/8",
        avatar: "https://static.photos/people/200x200/8",
        likes: 1234,
        views: "6.7K",
        comments: 78,
        description: "Abandoned factory exploration. High contrast black and white processing to emphasize texture.",
        tags: ["urban", "abandoned", "blackwhite", "photography"]
    },
    {
        id: 9,
        title: "Dragon's Lair",
        artist: "FantasyMaster",
        category: "digital",
        image: "https://static.photos/abstract/640x480/9",
        avatar: "https://static.photos/people/200x200/9",
        likes: 3892,
        views: "18K",
        comments: 156,
        description: "Epic fantasy scene. Photoshop and Wacom Cintiq. 40+ hours of work on the scales alone!",
        tags: ["dragon", "fantasy", "epic", "creature"]
    },
    {
        id: 10,
        title: "Minimalist Architecture",
        artist: "CleanLines",
        category: "photography",
        image: "https://static.photos/minimal/640x360/10",
        avatar: "https://static.photos/people/200x200/10",
        likes: 2156,
        views: "9.3K",
        comments: 67,
        description: "Geometry in modern architecture. Shot in Tokyo. Minimal post-processing to maintain clean lines.",
        tags: ["architecture", "minimal", "geometry", "modern"]
    },
    {
        id: 11,
        title: "Space Station Omega",
        artist: "StarTraveler",
        category: "3d",
        image: "https://static.photos/technology/640x480/11",
        avatar: "https://static.photos/people/200x200/11",
        likes: 1789,
        views: "7.8K",
        comments: 89,
        description: "Environment design for sci-fi game project. Blender and Unreal Engine 5. Real-time rendering.",
        tags: ["3d", "environment", "scifi", "space"]
    },
    {
        id: 12,
        title: "Watercolor Sunset",
        artist: "BrushAndPaint",
        category: "traditional",
        image: "https://static.photos/nature/640x360/12",
        avatar: "https://static.photos/people/200x200/12",
        likes: 923,
        views: "3.4K",
        comments: 34,
        description: "Wet-on-wet technique. Winsor & Newton watercolors. Arches cold press 300gsm.",
        tags: ["watercolor", "traditional", "sunset", "seascape"]
    }
];

let currentCategory = 'all';
let currentSort = 'newest';
let likedArtworks = new Set();

// Initialize
document.addEventListener('DOMContentLoaded', () => {
    lucide.createIcons();
    renderGallery();
    setupEventListeners();
    checkNullUndefined();
});

// Error handling demonstration for undefined/null
function checkNullUndefined() {
    // Simulating safe data access patterns
    const safeGet = (obj, path, defaultValue = null) => {
        try {
            return path.split('.').reduce((acc, part) => 
                acc && acc[part] !== undefined ? acc[part] : defaultValue, obj);
        } catch (e) {
            console.warn('Null/Undefined value encountered:', path);
            return defaultValue;
        }
    };

    // Example of handling potentially undefined data
    const testData = { artwork: { title: "Test", stats: null } };
    
    // Safe access without errors
    const title = safeGet(testData, 'artwork.title', 'Untitled');
    const likes = safeGet(testData, 'artwork.stats.likes', 0);
    
    console.log('Null/Undefined handling demo:', { title, likes });
}

function renderGallery() {
    const gallery = document.getElementById('gallery');
    const filtered = filterArtworks();
    const sorted = sortArtworks(filtered);
    
    gallery.innerHTML = sorted.map(artwork => createArtworkCard(artwork)).join('');
    lucide.createIcons();
    
    // Update count
    document.getElementById('resultCount').textContent = `Showing ${sorted.length} artworks`;
}

function createArtworkCard(artwork) {
    const isLiked = likedArtworks.has(artwork.id);
    const likeClass = isLiked ? 'text-red-500 fill-current' : 'text-white';
    
    return `
        <div class="group relative bg-card rounded-lg overflow-hidden cursor-pointer transition-transform hover:scale-[1.02] hover:shadow-2xl" 
             onclick="openModal(${artwork.id})">
            <div class="aspect-w-4 aspect-h-3 relative overflow-hidden">
                <img src="${artwork.image}" 
                     alt="${artwork.title}" 
                     class="w-full h-64 object-cover transition-transform duration-500 group-hover:scale-110"
                     loading="lazy"
                     onerror="this.src='https://static.photos/abstract/640x480/999'">
                
                <!-- Hover Overlay -->
                <div class="absolute inset-0 opacity-0 group-hover:opacity-100 transition-opacity duration-300">
                    <div class="absolute inset-0 hover-overlay"></div>
                    <div class="absolute bottom-0 left-0 right-0 p-4 transform translate-y-2 group-hover:translate-y-0 transition-transform">
                        <h3 class="font-bold text-white text-lg mb-1 line-clamp-1">${artwork.title}</h3>
                        <p class="text-gray-300 text-sm mb-2">by ${artwork.artist}</p>
                        <div class="flex items-center justify-between">
                            <div class="flex items-center gap-3 text-xs text-gray-300">
                                <span class="flex items-center gap-1">
                                    <i data-lucide="heart" class="w-3 h-3"></i>
                                    ${formatNumber(artwork.likes)}
                                </span>
                                <span class="flex items-center gap-1">
                                    <i data-lucide="message-circle" class="w-3 h-3"></i>
                                    ${artwork.comments}
                                </span>
                            </div>
                            <button onclick="toggleLike(event, ${artwork.id})" 
                                    class="p-2 rounded-full bg-white/20 hover:bg-white/30 transition-colors ${likeClass}">
                                <i data-lucide="heart" class="w-4 h-4 ${isLiked ? 'fill-current'}"></i>
                            </button>
                        </div>
                    </div>
                </div>
                
                <!-- Category Badge -->
                <div class="absolute top-3 left-3">
                    <span class="px-2 py-1 bg-black/60 backdrop-blur-sm rounded text-xs font-medium text-white capitalize">
                        ${artwork.category}
                    </span>
                </div>
            </div>
        </div>
    `;
}

function filterArtworks() {
    if (currentCategory === 'all') return artworks;
    return artworks.filter(art => art.category === currentCategory);
}

function sortArtworks(artworks) {
    const sorted = [...artworks];
    switch(currentSort) {
        case 'popular':
            return sorted.sort((a, b) => b.likes - a.likes);
        case 'comments':
            return sorted.sort((a, b) => b.comments - a.comments);
        default:
            return sorted.sort((a, b) => b.id - a.id);
    }
}

function formatNumber(num) {
    if (num >= 1000) {
        return (num / 1000).toFixed(1) + 'K';
    }
    return num;
}

function toggleLike(event, id) {
    event.stopPropagation();
    
    if (likedArtworks.has(id)) {
        likedArtworks.delete(id);
        showToast('Removed from favorites');
    } else {
        likedArtworks.add(id);
        showToast('Added to favorites');
        
        // Add animation class
        const btn = event.currentTarget;
        btn.classList.add('like-anim');
        setTimeout(() => btn.classList.remove('like-anim'), 300);
    }
    
    renderGallery();
}

function openModal(id) {
    const artwork = artworks.find(a => a.id === id);
    if (!artwork) {
        console.error('Artwork not found:', id);
        return;
    }
    
    document.getElementById('modalImage').src = artwork.image;
    document.getElementById('modalTitle').textContent = artwork.title;
    document.getElementById('modalCategory').textContent = artwork.category.charAt(0).toUpperCase() + artwork.category.slice(1);
    document.getElementById('modalArtist').textContent = artwork.artist;
    document.getElementById('modalAvatar').src = artwork.avatar;
    document.getElementById('modalDescription').textContent = artwork.description;
    document.getElementById('modalViews').textContent = artwork.views;
    document.getElementById('modalComments').textContent = artwork.comments;
    document.getElementById('modalLikes').textContent = artwork.likes;
    
    // Render tags
    const tagsContainer = document.getElementById('modalTags');
    tagsContainer.innerHTML = artwork.tags.map(tag => 
        `<span class="px-3 py-1 bg-gray-800 rounded-full text-xs text-gray-300 hover:bg-accent hover:text-dark cursor-pointer transition-colors">#${tag}</span>`
    ).join('');
    
    // Setup like button in modal
    const likeBtn = document.getElementById('modalLikeBtn');
    const isLiked = likedArtworks.has(id);
    updateModalLikeButton(likeBtn, isLiked);
    
    likeBtn.onclick = () => {
        if (likedArtworks.has(id)) {
            likedArtworks.delete(id);
            updateModalLikeButton(likeBtn, false);
            showToast('Removed from favorites');
        } else {
            likedArtworks.add(id);
            updateModalLikeButton(likeBtn, true);
            showToast('Added to favorites');
        }
        renderGallery();
    };
    
    document.getElementById('imageModal').classList.remove('hidden');
    document.body.style.overflow = 'hidden';
    lucide.createIcons();
}

function updateModalLikeButton(btn, isLiked) {
    const icon = btn.querySelector('i');
    if (isLiked) {
        icon.classList.add('text-red-500', 'fill-current');
        icon.classList.remove('text-white');
    } else {
        icon.classList.remove('text-red-500', 'fill-current');
        icon.classList.add('text-white');
    }
}

function closeModal() {
    document.getElementById('imageModal').classList.add('hidden');
    document.body.style.overflow = '';
}

function showToast(message) {
    const toast = document.getElementById('toast');
    const toastMessage = document.getElementById('toastMessage');
    toastMessage.textContent = message;
    
    toast.classList.remove('translate-y-20', 'opacity-0');
    
    setTimeout(() => {
        toast.classList.add('translate-y-20', 'opacity-0');
    }, 3000);
}

function setupEventListeners() {
    // Filter buttons
    document.querySelectorAll('.filter-btn').forEach(btn => {
        btn.addEventListener('click', (e) => {
            document.querySelectorAll('.filter-btn').forEach(b => {
                b.classList.remove('active', 'bg-accent', 'text-dark');
                b.classList.add('bg-card', 'border-gray-700');
            });
            e.target.classList.remove('bg-card', 'border-gray-700');
            e.target.classList.add('active', 'bg-accent', 'text-dark');
            
            currentCategory = e.target.dataset.category;
            renderGallery();
        });
    });
    
    // Sort select
    document.getElementById('sortSelect').addEventListener('change', (e) => {
        currentSort = e.target.value;
        renderGallery();
    });
    
    // Search
    document.getElementById('searchInput').addEventListener('input', (e) => {
        const query = e.target.value.toLowerCase();
        if (query === '') {
            renderGallery();
            return;
        }
        
        const filtered = artworks.filter(art => 
            art.title.toLowerCase().includes(query) || 
            art.artist.toLowerCase().includes(query) ||
            art.tags.some(tag => tag.toLowerCase().includes(query))
        );
        
        const gallery = document.getElementById('gallery');
        gallery.innerHTML = filtered.map(artwork => createArtworkCard(artwork)).join('');
        lucide.createIcons();
        document.getElementById('resultCount').textContent = `Found ${filtered.length} artworks`;
    });
    
    // Modal close
    document.getElementById('closeModal').addEventListener('click', closeModal);
    document.getElementById('imageModal').addEventListener('click', (e) => {
        if (e.target.id === 'imageModal') closeModal();
    });
    
    // Keyboard navigation
    document.addEventListener('keydown', (e) => {
        if (e.key === 'Escape') closeModal();
    });
    
    // Load more (simulation)
    document.getElementById('loadMoreBtn').addEventListener('click', () => {
        const loadingState = document.getElementById('loadingState');
        const btn = document.getElementById('loadMoreBtn');
        
        btn.classList.add('hidden');
        loadingState.classList.remove('hidden');
        
        setTimeout(() => {
            loadingState.classList.add('hidden');
            btn.classList.remove('hidden');
            showToast('More artworks loaded!');
            
            // Duplicate existing artworks with new IDs to simulate more data
            const newArtworks = artworks.map(art => ({
                ...art,
                id: art.id + artworks.length,
                likes: Math.floor(Math.random() * 5000)
            }));
            artworks.push(...newArtworks);
            renderGallery();
        }, 1500);
    });
    
    // Theme toggle
    let isDark = true;
    document.getElementById('themeToggle').addEventListener('click', () => {
        isDark = !isDark;
        const icon = document.querySelector('#themeToggle i');
        if (isDark) {
            document.documentElement.classList.remove('light');
            icon.setAttribute('data-lucide', 'moon');
        } else {
            document.documentElement.classList.add('light');
            icon.setAttribute('data-lucide', 'sun');
        }
        lucide.createIcons();
    });
}

// Handle null/undefined image errors globally
window.addEventListener('error', (e) => {
    if (e.target.tagName === 'IMG') {
        console.warn('Image failed to load:', e.target.src);
        e.target.src = 'https://static.photos/abstract/640x480/999';
        e.target.onerror = null; // Prevent infinite loop
    }
}, true);