/**
 * VenueFlow — Queue Management UI
 */

// Filter queue stations by category
document.addEventListener('DOMContentLoaded', () => {
    const filterBtns = document.querySelectorAll('.queue-filter');

    filterBtns.forEach(btn => {
        btn.addEventListener('click', () => {
            const category = btn.dataset.category;

            // Update active state
            filterBtns.forEach(b => {
                b.classList.remove('active');
                b.classList.replace('btn-primary', 'btn-secondary');
                b.setAttribute('aria-selected', 'false');
            });
            btn.classList.add('active');
            btn.classList.replace('btn-secondary', 'btn-primary');
            btn.setAttribute('aria-selected', 'true');

            // Filter cards
            const cards = document.querySelectorAll('#queue-stations-list .queue-card');
            cards.forEach(card => {
                if (category === 'all' || card.dataset.category === category) {
                    card.style.display = 'flex';
                } else {
                    card.style.display = 'none';
                }
            });
        });
    });

    // Auto-refresh queue data
    setInterval(refreshQueues, 5000);
});

async function refreshQueues() {
    try {
        const data = await apiCall('/api/queue/summary');
        if (!data || !data.stations) return;

        data.stations.forEach(station => {
            const card = document.querySelector(`[data-station-id="${station.id}"]`);
            if (!card) return;

            const waitEl = card.querySelector('.queue-wait');
            if (waitEl) {
                waitEl.textContent = Math.round(station.estimated_wait_minutes) + ' min';
                waitEl.style.color = station.wait_color;
            }

            const metaEl = card.querySelector('.queue-meta');
            if (metaEl) {
                metaEl.textContent = `${station.category_label} • ${station.current_length} in line`;
            }

            const progressBar = card.querySelector('.progress-bar');
            if (progressBar) {
                const w = Math.min(station.estimated_wait_minutes * 3.3, 100);
                progressBar.style.width = w + '%';
                progressBar.className = `progress-bar ${station.wait_level}`;
            }
        });
    } catch (e) {
        // Silent fail for background refresh
    }
}

async function joinQueue(stationId) {
    try {
        const ticket = await apiCall('/api/queue/join', {
            method: 'POST',
            body: JSON.stringify({ station_id: stationId }),
        });

        if (ticket && ticket.id) {
            showToast(
                'Queue Joined! 🎫',
                `Ticket #${ticket.id} — Position ${ticket.position} at ${ticket.station_name}`,
                'success',
                8000
            );

            // Refresh the page to show updated tickets
            setTimeout(() => location.reload(), 1500);
        }
    } catch (err) {
        showToast('Could not join queue', err.message || 'Please try again', 'error');
    }
}

async function cancelTicket(ticketId) {
    if (!confirm('Cancel this virtual queue ticket?')) return;

    try {
        await apiCall('/api/queue/cancel', {
            method: 'POST',
            body: JSON.stringify({ ticket_id: ticketId }),
        });

        showToast('Ticket Cancelled', 'Your virtual queue spot has been released.', 'info');
        setTimeout(() => location.reload(), 1000);
    } catch (err) {
        showToast('Could not cancel', err.message || 'Please try again', 'error');
    }
}

console.log('⏱️ Queue UI loaded');