const AMENITY_ICONS = {
    has_ac: { icon: 'fa-snowflake', label: 'Кондиционер' },
    has_tv: { icon: 'fa-tv', label: 'ТВ' },
    has_fridge: { icon: 'fa-sink', label: 'Холодильник' },
    has_wifi: { icon: 'fa-wifi', label: 'WiFi' },
    has_kettle: { icon: 'fa-mug-hot', label: 'Чайник' },
    has_hairdryer: { icon: 'fa-wind', label: 'Фен' },
    has_shower: { icon: 'fa-shower', label: 'Душ в номере' },
    has_sea_view: { icon: 'fa-water', label: 'Вид на море' }
};

let cachedRooms = [];

async function loadRoomsPublic() {
    try {
        const res = await fetch('/api/rooms');
        if (!res.ok) throw new Error('Failed to load rooms');
        cachedRooms = await res.json();
        renderRoomsPublic(cachedRooms);
        updateRoomPrices(cachedRooms);
    } catch (err) {
        console.error('Error loading rooms:', err);
        document.getElementById('roomsEmpty').style.display = 'block';
    }
}

function renderRoomsPublic(rooms) {
    const grid = document.getElementById('roomsGrid');
    const empty = document.getElementById('roomsEmpty');
    
    if (!rooms || rooms.length === 0) {
        grid.innerHTML = '';
        empty.style.display = 'block';
        return;
    }
    
    empty.style.display = 'none';
    
    grid.innerHTML = rooms.map((room, index) => {
        const amenities = Array.isArray(room.amenities) ? room.amenities : [];
        const floors = Array.isArray(room.floors) ? room.floors : [];
        const images = Array.isArray(room.images) ? room.images : [];
        
        const primaryImg = images.find(i => i.is_primary) || images[0];
        let imageSrc = room.image_path || 'data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 400 250"%3E%3Crect fill="%23274151" width="400" height="250"/%3E%3Ctext fill="%2364748b" font-family="sans-serif" font-size="16" x="50%25" y="50%25" text-anchor="middle" dy=".3em"%3EФото%3C/text%3E%3C/svg%3E';
        if (primaryImg && primaryImg.image_path) {
            imageSrc = primaryImg.image_path;
        }
        const fullImageSrc = imageSrc.startsWith('uploads') ? '/' + imageSrc : imageSrc;

        const allImages = images.length > 0 ? images : (room.image_path ? [{ image_path: room.image_path, is_primary: 1 }] : []);
        
        let imagesHtml = '';
        if (allImages.length > 1) {
            const dotsHtml = allImages.map((img, i) => {
                const src = img.image_path.startsWith('uploads') ? '/' + img.image_path : img.image_path;
                return `<span class="room-img-dot ${i === 0 ? 'active' : ''}" data-index="${i}" data-src="${escapeHtml(src)}"></span>`;
            }).join('');
            imagesHtml = `<div class="room-img-carousel">
                <img src="${fullImageSrc}" alt="${room.name}" class="room-carousel-img" id="roomCarouselImg${index}"
                     onerror="this.src='data:image/svg+xml,%3Csvg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 400 250%22%3E%3Crect fill=%22%23274151%22 width=%22400%22 height=%22250%22/%3E%3Ctext fill=%22%2364748b%22 font-family=%22sans-serif%22 font-size=%2216%22 x=%2250%25%22 y=%2250%25%22 text-anchor=%22middle%22 dy=%22.3em%22%3EФото%3C/text%3E%3C/svg%3E'">
                <button class="room-carousel-prev" onclick="roomCarouselPrev(${index})">‹</button>
                <button class="room-carousel-next" onclick="roomCarouselNext(${index})">›</button>
                <div class="room-img-dots">${dotsHtml}</div>
            </div>`;
        } else {
            imagesHtml = `<img src="${fullImageSrc}" alt="${room.name}" class="room-carousel-img"
                 onerror="this.src='data:image/svg+xml,%3Csvg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 400 250%22%3E%3Crect fill=%22%23274151%22 width=%22400%22 height=%22250%22/%3E%3Ctext fill=%22%2364748b%22 font-family=%22sans-serif%22 font-size=%2216%22 x=%2250%25%22 y=%2250%25%22 text-anchor=%22middle%22 dy=%22.3em%22%3EФото%3C/text%3E%3C/svg%3E'">`;
        }
        
        const amenitiesHtml = amenities.map(a => {
            const info = AMENITY_ICONS[a];
            if (!info) return '';
            return `<span class="room-feature-tag"><i class="fas ${info.icon}"></i> ${info.label}</span>`;
        }).join('');
        
        const floorsStr = floors.length > 0 ? 'Этажи ' + floors.join(', ') : '';
        
        const extraBedsHtml = room.extra_beds > 0 
            ? `<div class="room-extra-hint">Возможно +${room.extra_beds} доп. мест (${room.extra_bed_price} ₽)</div>` 
            : '';
        
        const featuredClass = room.type === 'Семейный' ? ' featured' : '';
        
        return `
            <div class="col-lg-4">
                <div class="room-card${featuredClass}">
                    <div class="room-image">
                        ${imagesHtml}
                        <div class="room-category">${room.type}</div>
                        <div class="room-availability" id="roomAvail${index}" style="display:none;position:absolute;bottom:8px;left:8px;background:rgba(0,0,0,0.75);color:#fff;font-size:0.75rem;padding:3px 8px;border-radius:10px;"></div>
                    </div>
                    <div class="room-body">
                        <h3 class="room-name">${escapeHtml(room.name)}</h3>
                        <p class="room-desc">${escapeHtml(room.description || '')}</p>
                        <div class="room-meta">
                            <span><i class="fas fa-door-open"></i> ${room.area_sqm || 20} м²</span>
                            ${floorsStr ? `<span><i class="fas fa-layer-group"></i> ${floorsStr}</span>` : ''}
                            ${amenities.includes('has_shower') ? '<span><i class="fas fa-shower"></i> Душ в номере</span>' : ''}
                        </div>
                        <div class="room-features">
                            ${amenitiesHtml}
                        </div>
                        ${extraBedsHtml}
                        <div class="room-footer">
                            <div class="room-price">
                                <span class="amount">от ${room.price_per_night || 0} ₽</span>
                                <span class="period"> / ночь</span>
                            </div>
                            <button class="btn-book" data-bs-toggle="modal" data-bs-target="#bookingModal" data-room-id="${room.id}" data-room-type="${room.type}" data-room-name="${escapeHtml(room.name)}" data-max-guests="${room.max_guests}">Забронировать</button>
                        </div>
                    </div>
                </div>
            </div>
        `;
    }).join('');
    
    initRoomBookingHandlers();
}

let roomCarouselState = {};
let roomCarouselTimers = {};

function roomCarouselPrev(index) {
    if (!roomCarouselState[index]) roomCarouselState[index] = 0;
    const imgs = getRoomImagesForIndex(index);
    if (roomCarouselState[index] > 0) roomCarouselState[index]--;
    else roomCarouselState[index] = imgs.length - 1;
    applyCarouselFrame(index, imgs);
}

function roomCarouselNext(index) {
    if (!roomCarouselState[index]) roomCarouselState[index] = 0;
    const imgs = getRoomImagesForIndex(index);
    if (roomCarouselState[index] < imgs.length - 1) roomCarouselState[index]++;
    else roomCarouselState[index] = 0;
    applyCarouselFrame(index, imgs);
}

function getRoomImagesForIndex(index) {
    const room = cachedRooms[index];
    if (!room) return [];
    const images = Array.isArray(room.images) && room.images.length > 0 ? room.images : (room.image_path ? [{ image_path: room.image_path, is_primary: 1 }] : []);
    return images;
}

function applyCarouselFrame(index, images) {
    const img = document.getElementById('roomCarouselImg' + index);
    const dots = document.querySelectorAll(`#roomCarouselImg${index} ~ .room-img-dots .room-img-dot`);
    if (!img || images.length === 0) return;
    const state = roomCarouselState[index];
    const src = images[state].image_path.startsWith('uploads') ? '/' + images[state].image_path : images[state].image_path;
    img.src = src;
    dots.forEach((d, i) => d.classList.toggle('active', i === state));
}

function updateRoomPrices(rooms) {
    const prices = {};
    const maxGuests = {};
    rooms.forEach(room => {
        prices[room.type] = room.price_per_night;
        maxGuests[room.type] = room.max_guests;
    });
    if (window.updateRoomPricesData) {
        window.updateRoomPricesData(prices, maxGuests);
    }
}

function initRoomBookingHandlers() {
    document.querySelectorAll('.btn-book').forEach(btn => {
        btn.addEventListener('click', function() {
            const roomId = this.getAttribute('data-room-id');
            const roomType = this.getAttribute('data-room-type');
            const roomName = this.getAttribute('data-room-name');
            const maxGuests = parseInt(this.getAttribute('data-max-guests')) || 4;
            document.getElementById('selectedRoom').value = roomType;
            document.getElementById('selectedRoomId').value = roomId;
            updateGuestOptionsDynamic(roomType, maxGuests);
            hidePriceInfo();
        });
    });
}

function updateGuestOptionsDynamic(roomType, maxGuests) {
    const guestsSelect = document.querySelector('[name="guests"]');
    if (!guestsSelect) return;
    
    let options = [];
    for (let i = 1; i <= maxGuests; i++) {
        let text = i === 1 ? '1 гость' : (i < 5 ? `${i} гостя` : `${i} гостей`);
        options.push(`<option value="${i}">${text}</option>`);
    }
    
    guestsSelect.innerHTML = options.join('');
}

async function checkRoomAvailability() {
    const checkin = document.querySelector('[name="checkin"]').value;
    const checkout = document.querySelector('[name="checkout"]').value;
    if (!checkin || !checkout) return;

    try {
        const res = await fetch(`/api/rooms/availability?checkin=${checkin}&checkout=${checkout}`);
        if (!res.ok) return;
        const data = await res.json();
        cachedRooms.forEach((room, i) => {
            const avail = data.find(a => a.id === room.id);
            const el = document.getElementById('roomAvail' + i);
            if (el && avail) {
                el.style.display = 'block';
                if (avail.available === 0) {
                    el.textContent = 'Нет мест';
                    el.style.background = 'rgba(239,68,68,0.85)';
                } else if (avail.available <= 2) {
                    el.textContent = 'Мест: ' + avail.available;
                    el.style.background = 'rgba(245,158,11,0.85)';
                } else {
                    el.textContent = 'Свободно: ' + avail.available;
                    el.style.background = 'rgba(22,163,74,0.85)';
                }
            }
        });
    } catch (e) {}
}

function escapeHtml(text) {
    if (!text) return '';
    const div = document.createElement('div');
    div.textContent = text;
    return div.innerHTML;
}

document.addEventListener('DOMContentLoaded', () => {
    loadRoomsPublic();
});