// ── Assets (images, audio, PDFs) ──

import { $, esc, api, getCsrf } from './util.js';

const AUDIO_EXT = /\.(mp3|ogg|wav|m4a)$/i;
const PDF_EXT   = /\.pdf$/i;
const IMAGE_EXT = /\.(png|jpe?g|gif|webp)$/i;

function fileType(url) {
    if (IMAGE_EXT.test(url)) return 'image';
    if (AUDIO_EXT.test(url)) return 'audio';
    if (PDF_EXT.test(url))   return 'pdf';
    return 'other';
}
function isAudio(url) { return AUDIO_EXT.test(url); }

function mediaTile(url, extraClass = '') {
    const type = fileType(url);
    if (type === 'audio') {
        return `<div class="aspect-square bg-t-bg border ${extraClass} rounded overflow-hidden flex flex-col items-center justify-center gap-2 p-2">
            <i class="ph ph-music-note text-2xl text-t-dim"></i>
            <audio controls preload="metadata" src="${url}" class="w-full" style="height:28px"></audio>
        </div>`;
    }
    if (type === 'pdf') {
        const name = url.split('/').pop();
        return `<div class="aspect-square bg-t-bg border ${extraClass} rounded overflow-hidden flex flex-col items-center justify-center gap-2 p-3">
            <i class="ph ph-file-pdf text-3xl text-t-danger"></i>
            <span class="font-pixel text-[8px] text-t-muted truncate w-full text-center">${esc(name)}</span>
        </div>`;
    }
    return `<div class="aspect-square bg-t-bg border ${extraClass} rounded overflow-hidden">
        <img src="${url}" class="w-full h-full object-cover ${extraClass.includes('danger') ? 'opacity-60' : ''}" loading="lazy">
    </div>`;
}

let activeFilter = 'all';
import { state } from './state.js';
import { showDialog } from './dialog.js';

// Cards with full bodies — fetched fresh by openGallery so we don't
// depend on state.cards which may have body=null during the two-phase
// lazy load (loadCards loads /api/cards/meta first, then batches of 25
// with bodies). Without this, most cards look body-less and every file
// appears orphaned until the last batch completes.
let galleryCards = [];

function getReferencedUrls() {
    const urls = new Set();
    for (const card of galleryCards) {
        const body = card.body || '';
        let m;
        // Markdown images: ![alt](url)
        const mdRe = /!\[[^\]]*\]\(([^)]+)\)/g;
        while ((m = mdRe.exec(body)) !== null) urls.add(m[1].split(/\s/)[0]);
        // HTML images
        const htmlRe = /<img[^>]+src=["']([^"']+)["'][^>]*>/gi;
        while ((m = htmlRe.exec(body)) !== null) urls.add(m[1]);
        // Slide-image blocks
        const slideRe = /```slide-image\s*\n([\s\S]*?)(?:\n```|$)/g;
        while ((m = slideRe.exec(body)) !== null) {
            const srcMatch = m[1].match(/^\s*src\s*:\s*([^\n]+)/m);
            if (srcMatch) urls.add(srcMatch[1].trim());
        }
        // Markdown links to uploads (PDFs, other assets): [text](uploads/...)
        const linkRe = /\[[^\]]*\]\((uploads\/[^)]+)\)/g;
        while ((m = linkRe.exec(body)) !== null) urls.add(m[1]);
        // Plain URL mentions (catches any format we missed above)
        const plainRe = /uploads\/[a-f0-9]{32}\.[a-z0-9]+/gi;
        while ((m = plainRe.exec(body)) !== null) urls.add(m[0]);
    }
    return urls;
}

function findCardForUrl(url) {
    for (const card of galleryCards) {
        const body = card.body || '';
        if (body.includes(url)) return card;
    }
    return null;
}

export async function openGallery() {
    const el = $('gallery');
    if (!el) return;

    // Fetch both file list and full card bodies in parallel. Using
    // api('api/cards') (not state.cards) guarantees bodies are present
    // — state.cards may still be in the two-phase lazy-load with
    // body=null on most entries.
    let files = [], cards = [];
    try {
        [files, cards] = await Promise.all([
            api('api/uploads'),
            api('api/cards'),
        ]);
    } catch {}
    files = Array.isArray(files) ? files : [];
    galleryCards = Array.isArray(cards) ? cards : [];
    const referenced = getReferencedUrls();
    const grid = $('gallery-grid');
    const count = $('gallery-count');

    const linked = [];
    const orphaned = [];
    for (const f of files) {
        const card = findCardForUrl(f.url);
        if (card) {
            linked.push({ ...f, cardId: card.id, cardTitle: card.title, cardColor: card.color });
        } else {
            orphaned.push(f);
        }
    }

    const total = linked.length + orphaned.length;
    if (count) count.textContent = `${total} asset${total !== 1 ? 's' : ''}${orphaned.length ? ` · ${orphaned.length} orphaned` : ''}`;

    // Tab filter
    const allFiles = [...orphaned, ...linked];
    const applyFilter = (filter) => {
        activeFilter = filter;
        document.querySelectorAll('#gallery-tabs .gallery-tab').forEach(t => {
            t.classList.toggle('active', t.dataset.filter === filter);
        });
        let visibleCount = 0;
        grid.querySelectorAll('.gallery-item').forEach(item => {
            const url = item.dataset.url || '';
            const type = fileType(url);
            const show = filter === 'all' || type === filter;
            item.style.display = show ? '' : 'none';
            if (show) visibleCount++;
        });
        // Hide section headers when no items in that section are visible
        grid.querySelectorAll('[data-section]:not(.gallery-item)').forEach(hdr => {
            const section = hdr.dataset.section;
            const hasVisible = !!grid.querySelector(`.gallery-item[data-section="${section}"]:not([style*="display: none"])`);
            hdr.style.display = hasVisible ? '' : 'none';
        });
        // Show/hide the empty-filter placeholder
        let placeholder = grid.querySelector('.gallery-filter-empty');
        if (visibleCount === 0 && total > 0) {
            if (!placeholder) {
                placeholder = document.createElement('div');
                placeholder.className = 'gallery-filter-empty col-span-full text-center py-16';
                const icons = { image: 'ph-image', audio: 'ph-music-note', pdf: 'ph-file-pdf' };
                const icon = icons[filter] || 'ph-folder-open';
                placeholder.innerHTML = `<i class="ph ${icon} text-4xl text-t-dim mb-2 block"></i><p class="font-pixel text-[10px] text-t-dim">no ${filter} assets</p>`;
                grid.appendChild(placeholder);
            }
            placeholder.style.display = '';
        } else if (placeholder) {
            placeholder.style.display = 'none';
        }
    };
    document.querySelectorAll('#gallery-tabs .gallery-tab').forEach(t => {
        t.onclick = () => applyFilter(t.dataset.filter);
    });

    if (!total) {
        grid.innerHTML = `<div class="col-span-full text-center py-16">
            <i class="ph ph-folder-open text-4xl text-t-dim mb-2 block"></i>
            <p class="font-pixel text-[10px] text-t-dim cursor-blink">no assets</p></div>`;
    } else {
        let html = '';

        if (orphaned.length) {
            html += `<div class="col-span-full font-pixel text-[10px] text-t-danger flex items-center gap-1.5 pt-2" data-section="orphaned"><i class="ph ph-warning text-xs"></i>orphaned (not used by any card)</div>`;
            html += orphaned.map(f => `
                <div class="gallery-item group cursor-pointer" data-orphan="${f.name}" data-url="${esc(f.url)}" data-section="orphaned">
                    <div class="relative">
                        ${mediaTile(f.url, 'border-t-danger/30 opacity-60')}
                        <div style="position:absolute;top:4px;right:4px;display:flex;gap:4px;" class="opacity-0 group-hover:opacity-100 transition-opacity">
                            <button class="w-6 h-6 flex items-center justify-center bg-black/80 text-t-accent rounded border-0 cursor-pointer hover:bg-t-accent hover:text-t-bg transition-colors" data-new-orphan="${f.name}" data-tip="new card"><i class="ph ph-plus text-sm"></i></button>
                            <button class="w-6 h-6 flex items-center justify-center bg-black/80 text-t-accent rounded border-0 cursor-pointer hover:bg-t-accent hover:text-t-bg transition-colors" data-new-slide="${f.name}" data-tip="new slide"><i class="ph ph-image-square text-sm"></i></button>
                            <button class="w-6 h-6 flex items-center justify-center bg-black/80 text-t-danger rounded border-0 cursor-pointer hover:bg-t-danger hover:text-t-bg transition-colors" data-del-orphan="${f.name}" data-tip="delete"><i class="ph ph-trash text-sm"></i></button>
                        </div>
                    </div>
                    <div class="mt-1 font-pixel text-[8px] text-t-dim truncate">${esc(f.name)}</div>
                </div>`).join('');
        }

        if (linked.length) {
            if (orphaned.length) html += `<div class="col-span-full font-pixel text-[10px] text-t-muted flex items-center gap-1.5 pt-3" data-section="linked"><i class="ph ph-link text-xs"></i>linked to cards</div>`;
            html += linked.map(img => `
                <div class="gallery-item group relative cursor-pointer" data-card-id="${img.cardId}" data-gallery-origin="${encodeURIComponent(img.url)}" data-url="${esc(img.url)}" data-section="linked">
                    ${mediaTile(img.url, 'border-t-border')}
                    <div class="absolute inset-0 bg-black/60 opacity-0 group-hover:opacity-100 transition-opacity rounded flex flex-col justify-end p-2">
                        <div class="flex items-center gap-1.5">
                            <span class="w-2 h-2 rounded-full shrink-0" style="background:${img.cardColor}"></span>
                            <span class="font-pixel text-[9px] text-white truncate">${esc(img.cardTitle)}</span>
                        </div>
                    </div>
                </div>`).join('');
        }

        grid.innerHTML = html;

        // Linked image clicks → open card
        grid.querySelectorAll('[data-card-id]').forEach(item => {
            item.addEventListener('click', () => {
                window._openDetail(item.dataset.cardId, {
                    fromGallery: true,
                    galleryOrigin: item.dataset.galleryOrigin || null,
                });
            });
        });

        // Orphan: click to enlarge (images) or open in new tab (PDFs)
        grid.querySelectorAll('[data-orphan]').forEach(item => {
            item.addEventListener('click', e => {
                if (e.target.closest('button')) return;
                const name = item.dataset.orphan;
                const f = orphaned.find(o => o.name === name);
                if (!f) return;
                const type = fileType(f.url);
                if (type === 'pdf') window.open(f.url, '_blank');
                else if (type === 'image') openOrphanLightbox(f);
            });
        });

        // Orphan: inline new card button
        grid.querySelectorAll('[data-new-orphan]').forEach(btn => {
            btn.addEventListener('click', e => {
                e.stopPropagation();
                const name = btn.dataset.newOrphan;
                const label = name.replace(/\.[^.]+$/, '');
                closeGallery();
                const type = fileType('uploads/' + name);
                const body = type === 'pdf'
                    ? `[📄 ${name}](uploads/${name})`
                    : `![${label}](uploads/${name})`;
                window._openModal({ id: null, title: label, body, color: '#38bdf8', bucket_id: null });
            });
        });

        // Orphan: inline new slide button (creates image slide with slide-image block)
        grid.querySelectorAll('[data-new-slide]').forEach(btn => {
            btn.addEventListener('click', e => {
                e.stopPropagation();
                const name = btn.dataset.newSlide;
                const label = name.replace(/\.[^.]+$/, '');
                closeGallery();
                const body = '```slide-image\nsrc: uploads/' + name + '\n```';
                window._openModal({ id: null, title: label, body, color: '#38bdf8', bucket_id: null });
            });
        });

        // Orphan: inline delete button
        grid.querySelectorAll('[data-del-orphan]').forEach(btn => {
            btn.addEventListener('click', async e => {
                e.stopPropagation();
                const name = btn.dataset.delOrphan;
                if (localStorage.getItem('hyprcrd-confirm-delete') !== '0') {
                    const ok = await showDialog({ title: 'delete_image', message: `Delete "${name}"?`, danger: true, okLabel: 'Delete' });
                    if (!ok) return;
                }
                await fetch(`api/uploads/${name}`, { method: 'DELETE', headers: { 'X-CSRF-Token': getCsrf() } });
                openGallery();
            });
        });
    }

    // Apply the active filter (persists across re-opens within a session)
    applyFilter(activeFilter);

    el.classList.add('open');
}

function openOrphanLightbox(file) {
    let overlay = document.querySelector('.orphan-lightbox');
    if (overlay) overlay.remove();

    overlay = document.createElement('div');
    overlay.className = 'orphan-lightbox';
    overlay.style.cssText = 'position:fixed;inset:0;z-index:200;display:flex;align-items:center;justify-content:center;background:rgba(2,6,23,0.92);';
    overlay.innerHTML = `
        <img src="${file.url}" style="max-width:min(92vw,1400px);max-height:85vh;object-fit:contain;border:1px solid var(--t-border);box-shadow:0 16px 60px rgba(0,0,0,0.55);">
        <div style="position:fixed;bottom:24px;left:50%;transform:translateX(-50%);display:flex;gap:8px;">
            <button class="orphan-lb-create flex items-center gap-1.5 px-3 py-1.5 text-xs border border-t-accent text-t-accent hover:bg-t-accent hover:text-t-bg transition-colors" style="border-radius:4px;">
                <i class="ph ph-plus text-sm"></i><span class="font-pixel text-[10px]">New card</span>
            </button>
            <button class="orphan-lb-slide flex items-center gap-1.5 px-3 py-1.5 text-xs border border-t-accent text-t-accent hover:bg-t-accent hover:text-t-bg transition-colors" style="border-radius:4px;">
                <i class="ph ph-image-square text-sm"></i><span class="font-pixel text-[10px]">New slide</span>
            </button>
            <button class="orphan-lb-delete flex items-center gap-1.5 px-3 py-1.5 text-xs border border-t-danger text-t-danger hover:bg-t-danger hover:text-t-bg transition-colors" style="border-radius:4px;">
                <i class="ph ph-trash text-sm"></i><span class="font-pixel text-[10px]">Delete</span>
            </button>
        </div>
        <button style="position:fixed;top:12px;right:12px;color:rgba(255,255,255,0.6);font-size:20px;background:none;border:none;cursor:pointer;" class="orphan-lb-close">
            <i class="ph ph-x"></i>
        </button>
    `;

    const close = () => overlay.remove();
    overlay.addEventListener('click', e => { if (e.target === overlay) close(); });
    overlay.querySelector('.orphan-lb-close').addEventListener('click', close);

    overlay.querySelector('.orphan-lb-create').addEventListener('click', async () => {
        const name = file.url.split('/').pop().replace(/\.[^.]+$/, '');
        close();
        closeGallery();
        window._openModal({ id: null, title: name, body: `![${name}](${file.url})`, color: '#38bdf8', bucket_id: null });
    });

    overlay.querySelector('.orphan-lb-slide').addEventListener('click', async () => {
        const name = file.url.split('/').pop().replace(/\.[^.]+$/, '');
        close();
        closeGallery();
        const body = '```slide-image\nsrc: ' + file.url + '\n```';
        window._openModal({ id: null, title: name, body, color: '#38bdf8', bucket_id: null });
    });

    overlay.querySelector('.orphan-lb-delete').addEventListener('click', async () => {
        const ok = await showDialog({ title: 'delete_image', message: `Delete "${file.name}"?`, danger: true, okLabel: 'Delete' });
        if (!ok) return;
        await fetch(`api/uploads/${file.name}`, { method: 'DELETE', headers: { 'X-CSRF-Token': getCsrf() } });
        close();
        openGallery();
    });

    document.body.appendChild(overlay);
}

export function closeGallery() {
    $('gallery')?.classList.remove('open');
}

$('gallery-close')?.addEventListener('click', closeGallery);
$('gallery')?.addEventListener('click', e => { if (e.target === $('gallery')) closeGallery(); });
$('gallery-btn')?.addEventListener('click', openGallery);

// Upload button
$('gallery-upload')?.addEventListener('click', () => $('gallery-upload-file')?.click());
$('gallery-upload-file')?.addEventListener('change', async e => {
    const files = Array.from(e.target.files || []);
    if (!files.length) return;
    for (const file of files) {
        const form = new FormData();
        form.append('file', file, file.name);
        try {
            await fetch('api/upload', {
                method: 'POST',
                body: form,
                headers: { 'X-CSRF-Token': getCsrf() },
            });
        } catch {}
    }
    e.target.value = '';
    await openGallery();
});