// ── Bookmarks Plugin ──
//
// A bookmark list is a card tagged #bookmarks. Its body is a JSON
// blob: { type:"bookmarks", columns:[{name, items:[{url,title,favicon}]}], columnWidth }.
// On the board the card renders as a coloured tile with a link icon
// and no body preview. Clicking opens a column-based overlay; each
// item is a small box with favicon + title. Click → open URL.
//
// Phase 1+2: skeleton, board decoration, overlay (read + write),
//            add/delete/rename, clipboard paste + server-side meta fetch.

const hyprcrd = window.hyprcrd;
if (!hyprcrd) throw new Error('[bookmarks] window.hyprcrd missing');

const $ = (id) => document.getElementById(id);

function esc(s) {
    return String(s ?? '').replace(/&/g, '&amp;').replace(/</g, '&lt;')
        .replace(/>/g, '&gt;').replace(/"/g, '&quot;').replace(/'/g, '&#39;');
}

const TAG = 'bookmarks';
let activeCardId = null;   // card id currently open in the overlay
let data = null;           // parsed JSON body of the active card

// ── Helpers ──────────────────────────────────────────────────────

function isBookmarkCard(card) {
    return (card.tags || '').split(',').map(s => s.trim()).includes(TAG);
}

function emptyData() {
    return { type: 'bookmarks', columns: [{ name: 'General', items: [] }], columnWidth: 220 };
}

function parseBody(body) {
    const text = (body || '').trim();
    // Full string might be pure JSON (legacy) or JSON + trailing
    // "\n\n#bookmarks" tag line that extractTags needs on the server.
    try {
        const d = JSON.parse(text);
        if (d?.type === 'bookmarks' && Array.isArray(d.columns)) return d;
    } catch {}
    // Strip trailing tag line and retry.
    const jsonEnd = text.lastIndexOf('}');
    if (jsonEnd >= 0) {
        try {
            const d = JSON.parse(text.substring(0, jsonEnd + 1));
            if (d?.type === 'bookmarks' && Array.isArray(d.columns)) return d;
        } catch {}
    }
    return emptyData();
}

function isUrl(s) {
    return /^https?:\/\/.+/i.test((s || '').trim());
}

function isCardLink(s) {
    return /^card:\d+$/i.test((s || '').trim());
}

function parseCardId(s) {
    const m = /^card:(\d+)$/i.exec((s || '').trim());
    return m ? m[1] : null;
}

async function save() {
    if (!activeCardId || !data) return;
    // The trailing #bookmarks tag is essential: the server's
    // extractTags() parses hashtags from the body text to populate
    // the `tags` column. Without it, isBookmarkCard (which checks
    // tags, not body) wouldn't recognise the card on meta-only
    // loads where body is still null.
    const body = JSON.stringify(data) + '\n\n#bookmarks';
    await hyprcrd.api(`api/cards/${activeCardId}`, {
        method: 'PATCH',
        body: { body },
    });
}

// ── Board card decoration ────────────────────────────────────────
// MutationObserver on #board: any card whose tags include "bookmarks"
// gets the .bm-card class + a link icon. Click is intercepted to
// open the overlay instead of the detail view.

function decorateBoard() {
    const board = $('board');
    if (!board) return;
    const cards = window.state?.cards || [];
    board.querySelectorAll('.board-card[data-id]').forEach(el => {
        const card = cards.find(c => String(c.id) === el.dataset.id);
        if (!card || !isBookmarkCard(card)) return;
        if (el.dataset.bmDone) return;
        el.dataset.bmDone = '1';
        el.classList.add('bm-card');
        // Replace the entire card content with a coloured tile
        // showing just a big link icon and the title. The original
        // innerHTML (bar + body preview + tags + meta) is noise for
        // a bookmark list card.
        const color = card.color || '#38bdf8';
        el.style.background = `color-mix(in srgb, ${color} 70%, var(--t-surface))`;
        el.style.borderColor = color;
        const date = (card.updated_at || card.created_at || '').substring(0, 10);
        const bucket = card.bucket_name || '';
        el.innerHTML = `
            <div class="bm-card-inner">
                <div class="bm-card-center">
                    <i class="ph ph-link bm-card-icon"></i>
                    <span class="bm-card-title">${esc(card.title)}</span>
                </div>
                <div class="bm-card-meta">
                    <span><i class="ph ph-clock"></i>${esc(date)}</span>
                    ${bucket ? `<span><i class="ph ph-folder"></i>${esc(bucket)}</span>` : ''}
                </div>
            </div>
        `;
        el.addEventListener('click', (e) => {
            e.preventDefault(); e.stopPropagation(); e.stopImmediatePropagation();
            openOverlay(card.id);
        }, true);
        el.addEventListener('dblclick', (e) => {
            e.preventDefault(); e.stopPropagation(); e.stopImmediatePropagation();
            openOverlay(card.id);
        }, true);
    });
}

// Re-decorate after every board render.
new MutationObserver(decorateBoard).observe(
    $('board') || document.body,
    { childList: true, subtree: true }
);

// ── Overlay ──────────────────────────────────────────────────────

const overlay = $('bookmarks-overlay');
const colsEl  = $('bookmarks-columns');
const slider  = $('bookmarks-col-width');

async function openOverlay(cardId) {
    activeCardId = cardId;
    let card = (window.state?.cards || []).find(c => c.id == cardId);
    if (!card) return;
    // Body might still be null if Phase-2 hasn't loaded it yet.
    // Fetch it explicitly so we don't clobber the stored JSON
    // (including columnWidth) with emptyData() defaults.
    if (card.body == null) {
        const full = await hyprcrd.api('api/cards?ids=' + cardId);
        if (Array.isArray(full) && full[0]) {
            const idx = (window.state?.cards || []).findIndex(c => c.id == cardId);
            if (idx >= 0) window.state.cards[idx] = full[0];
            card = full[0];
        }
    }
    $('bookmarks-title').textContent = card.title || 'Bookmarks';
    data = parseBody(card.body);
    if (slider) slider.value = data.columnWidth || 220;
    applyColumnWidth();
    renderColumns();
    overlay?.classList.add('open');
}

function closeOverlay() {
    overlay?.classList.remove('open');
    activeCardId = null;
    data = null;
    hideCtx();
}

function applyColumnWidth() {
    const w = slider ? parseInt(slider.value) : 220;
    colsEl?.style.setProperty('--bm-col-w', w + 'px');
    if (data) data.columnWidth = w;
}

function renderColumns() {
    if (!colsEl || !data) return;
    colsEl.innerHTML = '';
    data.columns.forEach((col, ci) => {
        const div = document.createElement('div');
        div.className = 'bm-col';
        div.dataset.col = ci;

        // Header
        const hdr = document.createElement('div');
        hdr.className = 'bm-col-header';
        hdr.innerHTML = `
            <span class="bm-col-name" title="${esc(col.name)}">${esc(col.name)}</span>
            <button class="bm-col-add" data-col="${ci}" title="add bookmark"><i class="ph ph-plus"></i></button>
        `;
        hdr.querySelector('.bm-col-name').addEventListener('click', () => renameColumn(ci));
        hdr.querySelector('.bm-col-name').addEventListener('contextmenu', (e) => {
            e.preventDefault();
            showColCtx(ci, e.clientX, e.clientY);
        });
        hdr.querySelector('.bm-col-add').addEventListener('click', () => addBookmark(ci));
        div.appendChild(hdr);

        // Items
        const items = document.createElement('div');
        items.className = 'bm-col-items';
        items.dataset.col = ci;
        if (!col.items.length) {
            items.innerHTML = '<div class="bm-col-empty">no bookmarks</div>';
        } else {
            col.items.forEach((it, ii) => {
                const el = document.createElement('div');
                el.className = 'bm-item';
                el.dataset.col = ci;
                el.dataset.idx = ii;
                el.draggable = true;
                const cardId = parseCardId(it.url);
                const isCard = !!cardId;
                let fav;
                if (isCard) {
                    // Card link: show a card icon instead of a web favicon.
                    const linked = (window.state?.cards || []).find(c => String(c.id) === cardId);
                    const linkedColor = linked?.color || 'var(--t-accent)';
                    fav = `<i class="ph ph-card bm-favicon-placeholder" style="color:${esc(linkedColor)}"></i>`;
                } else {
                    fav = it.favicon
                        ? `<img class="bm-favicon" src="${esc(it.favicon)}" onerror="this.outerHTML='<i class=\\'ph ph-globe bm-favicon-placeholder\\'></i>'">`
                        : '<i class="ph ph-globe bm-favicon-placeholder"></i>';
                }
                el.innerHTML = `${fav}<span class="bm-item-title" title="${esc(it.title || it.url)}">${esc(it.title || it.url)}</span>`;
                el.addEventListener('click', () => {
                    if (isCard) {
                        // Check if the linked card is itself a bookmark list.
                        const linked = (window.state?.cards || []).find(c => String(c.id) === cardId);
                        if (linked && isBookmarkCard(linked)) {
                            openOverlay(linked.id);
                        } else {
                            closeOverlay();
                            window._openDetail?.(parseInt(cardId));
                        }
                        return;
                    }
                    if (it.url) window.open(it.url, '_blank', 'noopener');
                });
                el.addEventListener('contextmenu', (e) => {
                    e.preventDefault();
                    showItemCtx(ci, ii, e.clientX, e.clientY);
                });
                // Drag
                el.addEventListener('dragstart', (e) => {
                    e.dataTransfer.setData('application/x-bm', JSON.stringify({ col: ci, idx: ii }));
                    e.dataTransfer.effectAllowed = 'move';
                    el.classList.add('dragging');
                });
                el.addEventListener('dragend', () => el.classList.remove('dragging'));
                items.appendChild(el);
            });
        }
        // Drop target — positional: a drop indicator line appears
        // between items based on the cursor's vertical position.
        // The item is inserted AT that position, not always at the end.
        items.addEventListener('dragover', (e) => {
            if (!e.dataTransfer.types.includes('application/x-bm')) return;
            e.preventDefault();
            e.dataTransfer.dropEffect = 'move';
            // Show a drop indicator between items.
            clearDropIndicator(items);
            const after = getDropIndex(items, e.clientY);
            const children = [...items.querySelectorAll('.bm-item')];
            if (after < children.length) {
                children[after].classList.add('bm-drop-above');
            } else if (children.length) {
                children[children.length - 1].classList.add('bm-drop-below');
            }
        });
        items.addEventListener('dragleave', () => clearDropIndicator(items));
        items.addEventListener('drop', (e) => {
            clearDropIndicator(items);
            const raw = e.dataTransfer.getData('application/x-bm');
            if (!raw) return;
            e.preventDefault();
            const src = JSON.parse(raw);
            const destCol = ci;
            if (!data) return;
            const [item] = data.columns[src.col].items.splice(src.idx, 1);
            if (!item) return;
            // Compute insertion index from cursor position.
            const insertAt = getDropIndex(items, e.clientY);
            // If source and dest are the same column, the splice above
            // shifted indices — getDropIndex already sees the shortened
            // list, so insertAt is correct as-is.
            data.columns[destCol].items.splice(insertAt, 0, item);
            save();
            renderColumns();
        });
        div.appendChild(items);
        colsEl.appendChild(div);
    });
}

// ── Drag-and-drop helpers ─────────────────────────────────────────

function getDropIndex(container, clientY) {
    const children = [...container.querySelectorAll('.bm-item')];
    for (let i = 0; i < children.length; i++) {
        const r = children[i].getBoundingClientRect();
        if (clientY < r.top + r.height / 2) return i;
    }
    return children.length;
}

function clearDropIndicator(container) {
    container.querySelectorAll('.bm-drop-above,.bm-drop-below').forEach(el => {
        el.classList.remove('bm-drop-above', 'bm-drop-below');
    });
}

// ── Wheel → horizontal scroll ────────────────────────────────────
colsEl?.addEventListener('wheel', (e) => {
    if (e.deltaY === 0) return;
    if (colsEl.scrollWidth <= colsEl.clientWidth) return;
    e.preventDefault();
    colsEl.scrollLeft += e.deltaY;
}, { passive: false });

// ── Slider ───────────────────────────────────────────────────────
slider?.addEventListener('input', () => {
    applyColumnWidth();
    renderColumns();
});
slider?.addEventListener('change', () => save());

// ── Context menus ────────────────────────────────────────────────

let ctxEl = null;

function hideCtx() {
    ctxEl?.remove();
    ctxEl = null;
}

function showCtx(x, y, buttons) {
    hideCtx();
    ctxEl = document.createElement('div');
    ctxEl.className = 'bm-ctx';
    ctxEl.style.left = x + 'px';
    ctxEl.style.top = y + 'px';
    buttons.forEach(([label, icon, cls, fn]) => {
        const b = document.createElement('button');
        if (cls) b.className = cls;
        b.innerHTML = `<i class="ph ${icon} text-sm"></i>${esc(label)}`;
        b.addEventListener('click', () => { hideCtx(); fn(); });
        ctxEl.appendChild(b);
    });
    document.body.appendChild(ctxEl);
    // Clamp to viewport
    const r = ctxEl.getBoundingClientRect();
    if (r.right > window.innerWidth - 8) ctxEl.style.left = Math.max(8, window.innerWidth - r.width - 8) + 'px';
    if (r.bottom > window.innerHeight - 8) ctxEl.style.top = Math.max(8, window.innerHeight - r.height - 8) + 'px';
    setTimeout(() => {
        const off = (e) => { if (!ctxEl?.contains(e.target)) { hideCtx(); document.removeEventListener('mousedown', off, true); } };
        document.addEventListener('mousedown', off, true);
    }, 0);
}

function showItemCtx(col, idx, x, y) {
    const item = data?.columns?.[col]?.items?.[idx];
    if (!item) return;
    showCtx(x, y, [
        ['Rename', 'ph-pencil-simple', '', async () => {
            const name = await hyprcrd.dialog.show({ title: 'rename bookmark', input: true, defaultValue: item.title || '', okLabel: 'Save' });
            if (name === false || name === null) return;
            item.title = name;
            await save();
            renderColumns();
        }],
        ['Delete', 'ph-trash', 'danger', async () => {
            data.columns[col].items.splice(idx, 1);
            await save();
            renderColumns();
        }],
    ]);
}

async function renameColumn(col) {
    const column = data?.columns?.[col];
    if (!column) return;
    const name = await hyprcrd.dialog.show({ title: 'rename column', input: true, defaultValue: column.name, okLabel: 'Save' });
    if (name === false || name === null || name.trim() === '') return;
    column.name = name.trim();
    await save();
    renderColumns();
}

function showColCtx(col, x, y) {
    const column = data?.columns?.[col];
    if (!column) return;
    showCtx(x, y, [
        ['Rename column', 'ph-pencil-simple', '', () => renameColumn(col)],
        ['Delete column', 'ph-trash', 'danger', async () => {
            if (column.items.length) {
                const ok = await hyprcrd.dialog.show({ title: 'delete column', message: `"${column.name}" has ${column.items.length} bookmark(s). Delete anyway?`, danger: true, okLabel: 'Delete' });
                if (!ok) return;
            }
            data.columns.splice(col, 1);
            if (!data.columns.length) data.columns.push({ name: 'General', items: [] });
            await save();
            renderColumns();
        }],
    ]);
}

// ── Add bookmark (clipboard + meta-fetch) ────────────────────────

async function addBookmark(colIdx) {
    let url = '';
    try {
        const clip = await navigator.clipboard.readText();
        if (isUrl(clip) || isCardLink(clip)) url = clip.trim();
    } catch {}

    if (!url) {
        const entered = await hyprcrd.dialog.show({
            title: 'new bookmark',
            input: true,
            placeholder: 'https://... or card:123',
            okLabel: 'Add',
        });
        if (!entered || !entered.trim()) return;
        url = entered.trim();
    }

    const item = { url, title: url, favicon: '' };

    if (isCardLink(url)) {
        // Resolve card title for the display label.
        const cid = parseCardId(url);
        const card = (window.state?.cards || []).find(c => String(c.id) === cid);
        if (card) item.title = card.title || url;
    } else if (isUrl(url)) {
        try {
            const meta = await hyprcrd.api('api/bookmarks/fetch-meta?url=' + encodeURIComponent(url));
            if (meta?.ok) {
                if (meta.title) item.title = meta.title;
                if (meta.favicon) item.favicon = meta.favicon;
                if (meta.url) item.url = meta.url;
            }
        } catch {}
    }

    data.columns[colIdx].items.push(item);
    await save();
    renderColumns();
}

// ── Add column ───────────────────────────────────────────────────

async function addColumn() {
    const name = await hyprcrd.dialog.show({
        title: 'new column',
        input: true,
        placeholder: 'column name',
        okLabel: 'Create',
    });
    if (!name || !name.trim()) return;
    data.columns.push({ name: name.trim(), items: [] });
    await save();
    renderColumns();
    // Scroll to the new column
    setTimeout(() => { colsEl.scrollLeft = colsEl.scrollWidth; }, 50);
}

// ── Header button injection ──────────────────────────────────────
// Creates a new #bookmarks card (or opens the most recent one).

function injectHeaderButton() {
    if ($('bookmarks-btn')) return;
    const header = document.querySelector('header#main-header');
    if (!header) return;
    const rows = header.querySelectorAll('.flex.items-center.gap-3');
    const group = rows[rows.length - 1];
    if (!group) return;
    const btn = document.createElement('button');
    btn.id = 'bookmarks-btn';
    btn.className = 'flex items-center gap-2 px-2.5 py-1.5 text-xs border border-t-border text-t-muted hover:border-t-accent hover:text-t-accent transition-colors';
    btn.innerHTML = '<i class="ph ph-link text-sm"></i><span class="font-pixel text-[10px]">Bookmarks</span>';
    btn.addEventListener('click', () => {
        const cards = (window.state?.cards || []).filter(isBookmarkCard)
            .sort((a, b) => (b.updated_at || '').localeCompare(a.updated_at || ''));
        if (cards.length === 0) {
            createBookmarkCard();
        } else {
            // Always show picker so the user can create new lists
            // even when only one exists.
            showBookmarkPicker(btn, cards);
        }
    });
    group.insertBefore(btn, group.firstChild);
}

// ── Rename the currently open bookmark card ──────────────────

async function renameCard() {
    if (!activeCardId) return;
    const card = (window.state?.cards || []).find(c => c.id == activeCardId);
    const current = card?.title || '';
    const name = await hyprcrd.dialog.show({
        title: 'rename bookmark list',
        input: true,
        defaultValue: current,
        okLabel: 'Save',
    });
    if (name === false || name === null || !name.trim()) return;
    await hyprcrd.api(`api/cards/${activeCardId}`, {
        method: 'PATCH',
        body: { title: name.trim() },
    });
    $('bookmarks-title').textContent = name.trim();
    await window._reloadAll?.();
}

// ── Create bookmark card with name prompt ────────────────────

async function createBookmarkCard() {
    const name = await hyprcrd.dialog.show({
        title: 'new bookmark list',
        input: true,
        placeholder: 'list name...',
        okLabel: 'Create',
    });
    if (!name || !name.trim()) return;
    const active = window.state?.activeBucket;
    const virtualBuckets = ['all', 'none', 'current', 'favorites', 'journal'];
    const bucketId = active && !virtualBuckets.includes(active) ? active : null;
    const created = await hyprcrd.api('api/cards', {
        method: 'POST',
        body: {
            title: name.trim(),
            body: JSON.stringify(emptyData()) + '\n\n#bookmarks',
            color: '#38bdf8',
            bucket_id: bucketId,
        },
    });
    if (created?.id) {
        await window._reloadAll?.();
        openOverlay(created.id);
    }
}

// ── Picker popup (multiple bookmark cards) ───────────────────

function showBookmarkPicker(anchor, cards) {
    document.querySelector('.bm-picker')?.remove();
    const rect = anchor.getBoundingClientRect();
    const pop = document.createElement('div');
    pop.className = 'bm-picker';
    pop.style.cssText = `position:fixed;left:${rect.left}px;top:${rect.bottom + 4}px;z-index:200;background:var(--t-surface);border:1px solid var(--t-border);box-shadow:0 4px 20px rgba(0,0,0,0.4);min-width:200px;max-height:300px;display:flex;flex-direction:column;border-radius:var(--ui-radius-modal,4px);`;

    const list = document.createElement('div');
    list.style.cssText = 'overflow-y:auto;flex:1;';
    cards.forEach(c => {
        const row = document.createElement('button');
        row.style.cssText = 'display:flex;align-items:center;gap:8px;width:100%;padding:8px 12px;background:none;border:none;color:var(--t-muted);font-size:12px;cursor:pointer;text-align:left;';
        row.innerHTML = `<span style="width:10px;height:10px;border-radius:2px;background:${c.color || '#38bdf8'};flex-shrink:0;"></span><span style="font-family:var(--t-font-pixel);font-size:10px;flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;">${esc(c.title)}</span>`;
        row.addEventListener('mouseenter', () => { row.style.color = 'var(--t-bright)'; });
        row.addEventListener('mouseleave', () => { row.style.color = 'var(--t-muted)'; });
        row.addEventListener('click', () => { pop.remove(); openOverlay(c.id); });
        list.appendChild(row);
    });
    pop.appendChild(list);

    const addBtn = document.createElement('button');
    addBtn.style.cssText = 'display:flex;align-items:center;gap:6px;width:100%;padding:8px 12px;background:none;border:none;border-top:1px solid var(--t-border);color:var(--t-accent);font-size:10px;font-family:var(--t-font-pixel);cursor:pointer;text-align:left;';
    addBtn.innerHTML = '<i class="ph ph-plus text-xs"></i> new list';
    addBtn.addEventListener('click', () => { pop.remove(); createBookmarkCard(); });
    pop.appendChild(addBtn);

    document.body.appendChild(pop);
    // Clamp
    const r = pop.getBoundingClientRect();
    if (r.right > window.innerWidth - 8) pop.style.left = Math.max(8, window.innerWidth - r.width - 8) + 'px';
    if (r.bottom > window.innerHeight - 8) pop.style.top = Math.max(8, window.innerHeight - r.height - 8) + 'px';

    const close = (e) => { if (!pop.contains(e.target) && e.target !== anchor) { pop.remove(); document.removeEventListener('mousedown', close, true); } };
    setTimeout(() => document.addEventListener('mousedown', close, true), 0);
}

// ── Init ─────────────────────────────────────────────────────────

function init() {
    injectHeaderButton();
    $('bookmarks-close')?.addEventListener('click', closeOverlay);
    $('bookmarks-col-add')?.addEventListener('click', addColumn);
    $('bookmarks-add-btn')?.addEventListener('click', () => {
        if (data?.columns?.length) addBookmark(0);
    });
    $('bookmarks-title')?.addEventListener('click', renameCard);
    overlay?.addEventListener('click', (e) => { if (e.target === overlay) closeOverlay(); });
    document.addEventListener('keydown', (e) => {
        if (e.key === 'Escape' && overlay?.classList.contains('open')) {
            e.stopPropagation();
            closeOverlay();
        }
    }, true);
    decorateBoard();
}

if (document.readyState === 'loading') {
    document.addEventListener('DOMContentLoaded', init);
} else {
    init();
}

hyprcrd.registerPlugin?.({
    name: 'bookmarks',
    version: '1.0.0',
    description: 'Column-based bookmark manager stored as cards',
});