/**
 * Asset Preview Module
 * 
 * Handles asset preview thumbnails, lightbox, and detail views
 */

export class AssetPreview {
    constructor() {
        this.lightbox = null;
        this.init();
    }

    init() {
        this.setupThumbnailClicks();
        this.setupLightbox();
        this.setupCopyUrl();
        this.setupVariantDeletion();
    }

    setupThumbnailClicks() {
        document.addEventListener('click', (e) => {
            const thumbnail = e.target.closest('.asset-preview-thumbnail');
            if (!thumbnail) return;

            const assetId = thumbnail.dataset.assetId;
            if (!assetId) return;

            // Navigate to detail view
            window.location.href = `/admin/assets/${assetId}`;
        });
    }

    setupLightbox() {
        // Create lightbox HTML
        const lightboxHTML = `
            <div class="asset-lightbox" id="asset-lightbox" style="display: none;">
                <div class="asset-lightbox__content">
                    <img class="asset-lightbox__image" src="" alt="Asset Preview" />
                    <button class="asset-lightbox__close" data-close-lightbox>×</button>
                    <div class="asset-lightbox__info">
                        <p class="asset-lightbox__filename"></p>
                        <p class="asset-lightbox__size"></p>
                    </div>
                </div>
            </div>
        `;

        // Add lightbox to body if not exists
        if (!document.getElementById('asset-lightbox')) {
            document.body.insertAdjacentHTML('beforeend', lightboxHTML);
            this.lightbox = document.getElementById('asset-lightbox');
        } else {
            this.lightbox = document.getElementById('asset-lightbox');
        }

        // Setup image clicks for lightbox
        document.addEventListener('click', (e) => {
            const img = e.target.closest('img[data-lightbox]');
            if (!img) return;

            e.preventDefault();
            this.openLightbox(img.src, img.alt, img.dataset.filename, img.dataset.size);
        });

        // Close lightbox
        document.addEventListener('click', (e) => {
            if (e.target.closest('[data-close-lightbox]') || e.target === this.lightbox) {
                this.closeLightbox();
            }
        });

        // Close on Escape key
        document.addEventListener('keydown', (e) => {
            if (e.key === 'Escape' && this.lightbox && this.lightbox.style.display !== 'none') {
                this.closeLightbox();
            }
        });
    }

    openLightbox(imageUrl, alt, filename, size) {
        if (!this.lightbox) return;

        const img = this.lightbox.querySelector('.asset-lightbox__image');
        const filenameEl = this.lightbox.querySelector('.asset-lightbox__filename');
        const sizeEl = this.lightbox.querySelector('.asset-lightbox__size');

        img.src = imageUrl;
        img.alt = alt;
        if (filenameEl) filenameEl.textContent = filename || alt;
        if (sizeEl) sizeEl.textContent = size || '';

        this.lightbox.style.display = 'flex';
        document.body.style.overflow = 'hidden';
    }

    closeLightbox() {
        if (!this.lightbox) return;

        this.lightbox.style.display = 'none';
        document.body.style.overflow = '';
    }

    setupCopyUrl() {
        document.addEventListener('click', async (e) => {
            const copyButton = e.target.closest('[data-copy-url]');
            if (!copyButton) return;

            e.preventDefault();

            try {
                const url = copyButton.href;
                const response = await fetch(url);
                const data = await response.json();
                const assetUrl = data.url || url;

                await navigator.clipboard.writeText(assetUrl);
                
                // Show success feedback
                const originalText = copyButton.textContent;
                copyButton.textContent = 'Copied!';
                copyButton.classList.add('copied');
                
                setTimeout(() => {
                    copyButton.textContent = originalText;
                    copyButton.classList.remove('copied');
                }, 2000);
            } catch (error) {
                console.error('Failed to copy URL:', error);
                alert('Failed to copy URL');
            }
        });
    }

    setupVariantDeletion() {
        document.addEventListener('click', async (e) => {
            const deleteButton = e.target.closest('[data-delete-variant]');
            if (!deleteButton) return;

            e.preventDefault();

            const variant = deleteButton.dataset.variant;
            const assetId = deleteButton.closest('[data-asset-id]')?.dataset.assetId || 
                           window.location.pathname.split('/').pop();

            if (!confirm(`Are you sure you want to delete variant "${variant}"?`)) {
                return;
            }

            try {
                deleteButton.disabled = true;
                deleteButton.textContent = 'Deleting...';

                const response = await fetch(`/api/v1/assets/${assetId}/variants/${variant}`, {
                    method: 'DELETE',
                    headers: {
                        'X-Requested-With': 'XMLHttpRequest',
                    },
                });

                if (!response.ok) {
                    throw new Error(`HTTP ${response.status}`);
                }

                // Remove variant item from DOM
                deleteButton.closest('.variant-item')?.remove();

                // Show success message
                if (window.Toast) {
                    window.Toast.success(`Variant "${variant}" deleted successfully`);
                }
            } catch (error) {
                console.error('Failed to delete variant:', error);
                deleteButton.disabled = false;
                deleteButton.textContent = 'Delete';
                
                if (window.Toast) {
                    window.Toast.error(`Failed to delete variant: ${error.message}`);
                } else {
                    alert(`Failed to delete variant: ${error.message}`);
                }
            }
        });
    }
}

// Auto-initialize
document.addEventListener('DOMContentLoaded', () => {
    new AssetPreview();
});