// ── Terminal plugin — in-app command line ──

const h = window.hyprcrd;
const $ = id => document.getElementById(id);

const panel = $('hterm');
const output = $('hterm-output');
const input = $('hterm-input');

let visible = false;
let history = [];
let historyIdx = -1;

function toggle() {
    visible = !visible;
    panel.classList.toggle('hidden', !visible);
    if (visible) { input.focus(); scrollBottom(); }
    else { document.activeElement?.blur(); }
}

function scrollBottom() {
    output.scrollTop = output.scrollHeight;
}

function print(text, cls = '') {
    const line = document.createElement('div');
    line.className = 'hterm-line' + (cls ? ' ' + cls : '');
    line.textContent = text;
    output.appendChild(line);
    scrollBottom();
}

function printHtml(html, cls = '') {
    const line = document.createElement('div');
    line.className = 'hterm-line' + (cls ? ' ' + cls : '');
    line.innerHTML = html;
    output.appendChild(line);
    scrollBottom();
}

// ── API helpers ──

async function api(path, opts = {}) {
    return h?.api?.(path, opts) || fetch(path, {
        headers: { 'Content-Type': 'application/json' },
        ...opts,
        body: opts.body ? JSON.stringify(opts.body) : undefined,
    }).then(r => r.json());
}

function fuzzy(needle, haystack) {
    const n = needle.toLowerCase();
    return haystack.filter(s => s.toLowerCase().includes(n));
}

function findCard(query) {
    const q = query.toLowerCase();
    return window.state?.cards?.find(c => c.title.toLowerCase() === q)
        || window.state?.cards?.find(c => c.title.toLowerCase().includes(q));
}

function findBucket(query) {
    const q = query.toLowerCase();
    return window.state?.buckets?.find(b => b.name.toLowerCase() === q)
        || window.state?.buckets?.find(b => b.name.toLowerCase().includes(q));
}

// ── Commands ──

const COMMANDS = {};

function register(name, desc, fn) {
    COMMANDS[name] = { desc, fn };
}

register('help', 'show available commands', () => {
    print('COMMANDS', 'heading');
    const maxLen = Math.max(...Object.keys(COMMANDS).map(k => k.length));
    for (const [name, cmd] of Object.entries(COMMANDS)) {
        print(`  ${name.padEnd(maxLen + 2)} ${cmd.desc}`, 'dim');
    }
});

register('clear', 'clear terminal output', () => {
    output.innerHTML = '';
});

register('go', 'go <bucket> — switch to bucket', (args) => {
    const name = args.join(' ');
    if (!name) { print('usage: go <bucket name>', 'err'); return; }
    const specials = { all: 'all', current: 'current', favorites: 'favorites', journal: 'journal', unsorted: 'none' };
    if (specials[name.toLowerCase()]) {
        window.state.activeBucket = specials[name.toLowerCase()];
        window._renderBoard?.();
        print(`switched to ${name}`, 'ok');
        return;
    }
    const b = findBucket(name);
    if (!b) { print(`bucket not found: ${name}`, 'err'); return; }
    window.state.activeBucket = b.id;
    window._renderBoard?.();
    print(`switched to ${b.name}`, 'ok');
});

register('open', 'open <card> — open card preview', async (args) => {
    const q = args.join(' ');
    if (!q) { print('usage: open <card title>', 'err'); return; }
    const c = findCard(q);
    if (!c) { print(`card not found: ${q}`, 'err'); return; }
    window._openDetail?.(c.id);
    print(`opened: ${c.title}`, 'ok');
});

register('edit', 'edit <card> — open card in editor', async (args) => {
    const q = args.join(' ');
    if (!q) { print('usage: edit <card title>', 'err'); return; }
    const c = findCard(q);
    if (!c) { print(`card not found: ${q}`, 'err'); return; }
    window._openModal?.(c);
    print(`editing: ${c.title}`, 'ok');
});

register('new', 'new <title> — create card in active bucket', async (args) => {
    const title = args.join(' ');
    if (!title) { print('usage: new <title>', 'err'); return; }
    const bucketId = window.state?.activeBucket;
    const numBucket = Number.isFinite(Number(bucketId)) ? Number(bucketId) : null;
    const res = await api('api/cards', { method: 'POST', body: { title, body: '', color: '#38bdf8', bucket_id: numBucket } });
    if (res?.id) {
        print(`created: ${title} (id: ${res.id})`, 'ok');
        await window._reloadAll?.();
    } else {
        print(res?.error || 'failed', 'err');
    }
});

register('delete', 'delete <card> — delete a card', async (args) => {
    const q = args.join(' ');
    if (!q) { print('usage: delete <card title>', 'err'); return; }
    const c = findCard(q);
    if (!c) { print(`card not found: ${q}`, 'err'); return; }
    await api(`api/cards/${c.id}`, { method: 'DELETE' });
    print(`deleted: ${c.title}`, 'ok');
    await window._reloadAll?.();
});

register('tag', 'tag <card> <tag> — add tag to card', async (args) => {
    if (args.length < 2) { print('usage: tag <card title> <tag>', 'err'); return; }
    const tag = args.pop();
    const q = args.join(' ');
    const c = findCard(q);
    if (!c) { print(`card not found: ${q}`, 'err'); return; }
    const body = (c.body || '') + `\n#${tag}`;
    await api(`api/cards/${c.id}`, { method: 'PATCH', body: { body } });
    print(`tagged ${c.title} with #${tag}`, 'ok');
    await window._reloadAll?.();
});

register('untag', 'untag <card> <tag> — remove tag from card', async (args) => {
    if (args.length < 2) { print('usage: untag <card title> <tag>', 'err'); return; }
    const tag = args.pop();
    const q = args.join(' ');
    const c = findCard(q);
    if (!c) { print(`card not found: ${q}`, 'err'); return; }
    const body = (c.body || '').replace(new RegExp(`\\s*#${tag}\\b`, 'g'), '');
    await api(`api/cards/${c.id}`, { method: 'PATCH', body: { body } });
    print(`removed #${tag} from ${c.title}`, 'ok');
    await window._reloadAll?.();
});

register('color', 'color <card> <hex> — change card color', async (args) => {
    if (args.length < 2) { print('usage: color <card title> <#hex>', 'err'); return; }
    const hex = args.pop();
    const q = args.join(' ');
    const c = findCard(q);
    if (!c) { print(`card not found: ${q}`, 'err'); return; }
    await api(`api/cards/${c.id}`, { method: 'PATCH', body: { color: hex } });
    print(`${c.title} → ${hex}`, 'ok');
    await window._reloadAll?.();
});

register('move', 'move <card> <bucket> — move card to bucket', async (args) => {
    if (args.length < 2) { print('usage: move <card title> <bucket name>', 'err'); return; }
    const bucketName = args.pop();
    const q = args.join(' ');
    const c = findCard(q);
    if (!c) { print(`card not found: ${q}`, 'err'); return; }
    const b = findBucket(bucketName);
    if (!b) { print(`bucket not found: ${bucketName}`, 'err'); return; }
    await api(`api/cards/${c.id}`, { method: 'PATCH', body: { bucket_id: b.id } });
    print(`moved ${c.title} → ${b.name}`, 'ok');
    await window._reloadAll?.();
});

register('search', 'search <query> — open search with query', (args) => {
    const q = args.join(' ');
    window._closeSearch?.();
    const searchInput = document.getElementById('search-input');
    const overlay = document.getElementById('search');
    if (overlay) overlay.classList.add('open');
    if (searchInput) { searchInput.value = q; searchInput.dispatchEvent(new Event('input')); searchInput.focus(); }
    print(`searching: ${q}`, 'ok');
});

register('calendar', 'open calendar', () => { window._openCalendar?.(); print('calendar opened', 'ok'); });
register('assets', 'open assets gallery', () => { window._openGallery?.(); print('assets opened', 'ok'); });

register('export', 'download export ZIP', () => {
    document.getElementById('export-btn')?.click();
    print('export started', 'ok');
});

register('sort', 'sort <mode> — manual/newest/oldest/alpha/tag', (args) => {
    const mode = args[0];
    if (!mode) { print('usage: sort <manual|newest|oldest|alpha|tag>', 'err'); return; }
    const sortBtn = document.getElementById('sort-toggle');
    if (sortBtn) {
        const label = document.getElementById('sort-label');
        if (label) label.textContent = mode;
        window.state.sortMode = mode;
        window._renderBoard?.();
        print(`sort: ${mode}`, 'ok');
    }
});

register('split', 'toggle split preview', () => {
    document.getElementById('board-split-toggle')?.click();
    print('split toggled', 'ok');
});

register('zen', 'toggle zen mode on current detail', () => {
    document.getElementById('detail-zen')?.click();
    print('zen toggled', 'ok');
});

register('count', 'show card and bucket counts', () => {
    const cards = window.state?.cards?.length || 0;
    const buckets = window.state?.buckets?.length || 0;
    print(`${cards} cards · ${buckets} buckets`, 'ok');
});

register('tags', 'list all tags', () => {
    const tagSet = new Set();
    for (const c of window.state?.cards || []) {
        for (const t of (c.tags || '').split(',').filter(Boolean)) tagSet.add(t);
    }
    if (!tagSet.size) { print('no tags', 'dim'); return; }
    const sorted = [...tagSet].sort();
    print(`${sorted.length} tags:`, 'heading');
    print(sorted.map(t => '#' + t).join('  '));
});

register('buckets', 'list all buckets', () => {
    const bs = window.state?.buckets || [];
    if (!bs.length) { print('no buckets', 'dim'); return; }
    print(`${bs.length} buckets:`, 'heading');
    for (const b of bs) print(`  ${b.name} (${b.id})${b.parent_id ? ` → child of ${b.parent_id}` : ''}`);
});

register('history', 'history <card> — show edit history', async (args) => {
    const q = args.join(' ');
    if (!q) { print('usage: history <card title>', 'err'); return; }
    const c = findCard(q);
    if (!c) { print(`card not found: ${q}`, 'err'); return; }
    let entries;
    try {
        const res = await fetch(`api/cards/${c.id}/history`);
        entries = await res.json();
    } catch (e) { print('failed to fetch history', 'err'); return; }
    if (!entries || !entries.length) { print(`${c.title}: no edit history`, 'dim'); return; }
    print(`${c.title} — ${entries.length} changes:`, 'heading');
    for (const e of entries) {
        const old = (e.old_value || '(empty)').replace(/\n/g, '↵').substring(0, 60);
        const nw = (e.new_value || '(empty)').replace(/\n/g, '↵').substring(0, 60);
        const time = e.changed_at?.substring(0, 16) || '?';
        print(`  ${time}  ${e.field}: ${old} → ${nw}`, 'dim');
    }
});

register('find', 'find <text> — list matching cards', (args) => {
    const q = args.join(' ').toLowerCase();
    if (!q) { print('usage: find <text>', 'err'); return; }
    const hits = (window.state?.cards || []).filter(c =>
        c.title.toLowerCase().includes(q) || (c.body || '').toLowerCase().includes(q) || (c.tags || '').toLowerCase().includes(q)
    );
    if (!hits.length) { print('no matches', 'dim'); return; }
    print(`${hits.length} matches:`, 'heading');
    for (const c of hits.slice(0, 20)) {
        print(`  ${c.title}${c.tags ? '  ' + (c.tags || '').split(',').map(t => '#' + t).join(' ') : ''}`, 'dim');
    }
    if (hits.length > 20) print(`  ... and ${hits.length - 20} more`, 'dim');
});

register('version', 'show app version', () => {
    const v = document.querySelector('[data-app-version]')?.textContent || '?';
    print(v, 'ok');
});

// ── Tab completion ──

function tabComplete() {
    const val = input.value;
    const parts = val.split(/\s+/);
    if (parts.length <= 1) {
        const matches = fuzzy(parts[0] || '', Object.keys(COMMANDS));
        if (matches.length === 1) { input.value = matches[0] + ' '; }
        else if (matches.length > 1) { print(matches.join('  '), 'dim'); }
    }
}

// ── Execute ──

async function exec(line) {
    const trimmed = line.trim();
    if (!trimmed) return;

    history.push(trimmed);
    historyIdx = history.length;
    print(trimmed, 'cmd');

    const parts = trimmed.split(/\s+/);
    const cmd = parts.shift().toLowerCase();
    const command = COMMANDS[cmd];

    if (!command) {
        print(`unknown command: ${cmd}. Type "help" for a list.`, 'err');
        return;
    }
    try {
        await command.fn(parts);
    } catch (e) {
        print(`error: ${e.message}`, 'err');
    }
}

// ── Event handlers ──

input?.addEventListener('keydown', e => {
    if (e.key === 'Enter') {
        e.preventDefault();
        const val = input.value;
        input.value = '';
        exec(val);
    } else if (e.key === 'Tab') {
        e.preventDefault();
        tabComplete();
    } else if (e.key === 'ArrowUp') {
        e.preventDefault();
        if (historyIdx > 0) { historyIdx--; input.value = history[historyIdx]; }
    } else if (e.key === 'ArrowDown') {
        e.preventDefault();
        if (historyIdx < history.length - 1) { historyIdx++; input.value = history[historyIdx]; }
        else { historyIdx = history.length; input.value = ''; }
    } else if (e.key === 'Escape') {
        e.preventDefault(); e.stopPropagation();
        toggle();
    }
});

// Shift+T toggle (capture, before shortcuts)
window.addEventListener('keydown', e => {
    if (e.key === 'T' && e.shiftKey && !e.ctrlKey && !e.altKey && !e.metaKey) {
        const tag = document.activeElement?.tagName;
        if (tag === 'INPUT' || tag === 'TEXTAREA' || tag === 'SELECT' || document.activeElement?.isContentEditable) return;
        e.preventDefault(); e.stopPropagation(); e.stopImmediatePropagation();
        toggle();
    }
}, { capture: true });

print('hyprcrd terminal — type "help" for commands, Shift+T to toggle', 'dim');

h?.registerPlugin({ name: 'terminal', version: '1.0.0' });