// Preloader
window.addEventListener('load', () => {
  setTimeout(() => {
    document.getElementById('preloader').classList.add('hidden');
  }, 1500);
});

// Navbar scroll effect
const navbar = document.querySelector('.navbar');
window.addEventListener('scroll', () => {
  if (window.scrollY > 80) {
    navbar.classList.add('scrolled');
  } else {
    navbar.classList.remove('scrolled');
  }
});

// Scroll animations
const observerOptions = {
  threshold: 0.1,
  rootMargin: '0px 0px -50px 0px'
};

const observer = new IntersectionObserver((entries) => {
  entries.forEach(entry => {
    if (entry.isIntersecting) {
      entry.target.classList.add('animated');
    }
  });
}, observerOptions);

document.querySelectorAll('.animate-on-scroll').forEach(el => {
  observer.observe(el);
});

// Counter animation
const counterObserver = new IntersectionObserver((entries) => {
  entries.forEach(entry => {
    if (entry.isIntersecting) {
      const counters = entry.target.querySelectorAll('.counter');
      counters.forEach(counter => {
        const target = parseInt(counter.getAttribute('data-target'));
        const duration = 2000;
        const step = target / (duration / 16);
        let current = 0;
        const timer = setInterval(() => {
          current += step;
          if (current >= target) {
            counter.textContent = target;
            clearInterval(timer);
          } else {
            counter.textContent = Math.floor(current);
          }
        }, 16);
      });
      counterObserver.unobserve(entry.target);
    }
  });
}, { threshold: 0.5 });

const statsSection = document.querySelector('.hero-stats');
if (statsSection) counterObserver.observe(statsSection);

// Set min date for checkin to today
const today = new Date().toISOString().split('T')[0];
document.querySelector('[name="checkin"]').min = today;
document.querySelector('[name="checkout"]').min = today;

// Booking modal - set room name
document.querySelectorAll('.btn-book').forEach(btn => {
  btn.addEventListener('click', function() {
    const room = this.getAttribute('data-room');
    document.getElementById('selectedRoom').value = room;
    const maxGuests = parseInt(this.getAttribute('data-max-guests')) || ROOM_MAX_GUESTS[room] || 4;
    updateGuestOptionsFallback(room);
    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('');
}

window.updateRoomPricesData = function(prices, maxGuests) {
  Object.assign(ROOM_PRICES, prices);
  Object.assign(ROOM_MAX_GUESTS, maxGuests);
};

function updateGuestOptions(room) {
  const guestsSelect = document.querySelector('[name="guests"]');
  if (!guestsSelect) return;
  
  const maxGuests = ROOM_MAX_GUESTS[room] || 4;
  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('');
}

function updateGuestOptionsFallback(room) {
  const guestsSelect = document.querySelector('[name="guests"]');
  if (!guestsSelect) return;
  
  const options2x = [
    { value: 1, text: '1 гость' },
    { value: 2, text: '2 гостя' }
  ];
  
  const options3x = [
    { value: 1, text: '1 гость' },
    { value: 2, text: '2 гостя' },
    { value: 3, text: '3 гостя' }
  ];
  
  const optionsDefault = [
    { value: 1, text: '1 гость' },
    { value: 2, text: '2 гостя' },
    { value: 3, text: '3 гостя' },
    { value: 4, text: '4 гостя' }
  ];
  
  let options = optionsDefault;
  if (room === '2x-местный') options = options2x;
  else if (room === '3х-местный') options = options3x;
  
  guestsSelect.innerHTML = options.map(o => `<option value="${o.value}">${o.text}</option>`).join('');
}

function hideGuestOptionsUpdate() {}

// Price calculation
const ROOM_PRICES = { '2x-местный': 1500, '3х-местный': 2000, 'Семейный': 3000, 'Люкс': 4500 };
const ROOM_MAX_GUESTS = { '2x-местный': 2, '3х-местный': 3, 'Семейный': 4, 'Люкс': 4 };
let currentPromocodeData = null;

function calculateNights(checkin, checkout) {
    const ci = new Date(checkin);
    const co = new Date(checkout);
    return Math.ceil((co - ci) / (1000 * 60 * 60 * 24));
}

function validateBookingDates() {
    const checkinInput = document.querySelector('[name="checkin"]');
    const checkoutInput = document.querySelector('[name="checkout"]');
    const today = new Date();
    today.setHours(0, 0, 0, 0);
    
    if (checkinInput.value) {
        const checkinDate = new Date(checkinInput.value);
        if (checkinDate < today) {
            checkinInput.setCustomValidity('Дата заезда не может быть в прошлом');
        } else {
            checkinInput.setCustomValidity('');
        }
    }
    
    if (checkinInput.value && checkoutInput.value) {
        const checkinDate = new Date(checkinInput.value);
        const checkoutDate = new Date(checkoutInput.value);
        
        if (checkoutDate <= checkinDate) {
            checkoutInput.setCustomValidity('Дата выезда должна быть позже даты заезда');
        } else {
            checkoutInput.setCustomValidity('');
        }
    }
    
    return checkinInput.checkValidity() && checkoutInput.checkValidity();
}

document.querySelector('[name="checkin"]').addEventListener('change', validateBookingDates);
document.querySelector('[name="checkout"]').addEventListener('change', validateBookingDates);

function updatePriceDisplay(basePrice, discountPercent, discountAmount, totalPrice) {
    document.getElementById('basePriceDisplay').textContent = basePrice + ' ₽';
    document.getElementById('discountPercentDisplay').textContent = discountPercent;
    document.getElementById('discountAmountDisplay').textContent = '-' + discountAmount + ' ₽';
    document.getElementById('totalPriceDisplay').textContent = totalPrice + ' ₽';
    document.getElementById('priceInfo').style.display = 'block';
}

function hidePriceInfo() {
    document.getElementById('priceInfo').style.display = 'none';
    currentPromocodeData = null;
}

function getFormData() {
    return {
        room: document.getElementById('selectedRoom').value,
        checkin: document.querySelector('[name="checkin"]').value,
        checkout: document.querySelector('[name="checkout"]').value,
        promocode: document.getElementById('promocodeInput').value.trim()
    };
}

async function checkPromocode() {
    const { room, checkin, checkout, promocode } = getFormData();
    if (!room || !checkin || !checkout) {
        hidePriceInfo();
        return;
    }

    const basePrice = ROOM_PRICES[room] ? ROOM_PRICES[room] * calculateNights(checkin, checkout) : 0;

    if (!promocode) {
        updatePriceDisplay(basePrice, 0, 0, basePrice);
        currentPromocodeData = null;
        return;
    }

    try {
        const response = await fetch('/api/promocodes/validate', {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify({ code: promocode, room_type: room, checkin, checkout })
        });
        const data = await response.json();

        if (data.valid) {
            currentPromocodeData = data;
            updatePriceDisplay(data.base_price, data.discount_percent, data.discount_amount, data.total_price);
        } else {
            hidePriceInfo();
            currentPromocodeData = null;
        }
    } catch (error) {
        console.error('Promocode validation error:', error);
        hidePriceInfo();
    }
}

document.getElementById('checkPromocodeBtn').addEventListener('click', checkPromocode);
document.getElementById('promocodeInput').addEventListener('blur', checkPromocode);
document.querySelector('[name="checkin"]').addEventListener('change', checkPromocode);
document.querySelector('[name="checkout"]').addEventListener('change', checkPromocode);
document.querySelectorAll('.btn-book').forEach(btn => {
    btn.addEventListener('click', function() {
        setTimeout(checkPromocode, 100);
    });
});

// Form submission
document.getElementById('bookingForm').addEventListener('submit', async function(e) {
  e.preventDefault();
  const btn = this.querySelector('.btn-submit-booking');
  const originalText = btn.innerHTML;
  
  btn.innerHTML = '<i class="fas fa-spinner fa-spin me-2"></i>Отправка...';
  btn.disabled = true;

  const formData = {
    name: this.querySelector('[name="name"]').value,
    phone: this.querySelector('[name="phone"]').value,
    adults: parseInt(this.querySelector('[name="guests"]').value),
    children: 0,
    checkin: this.querySelector('[name="checkin"]').value,
    checkout: this.querySelector('[name="checkout"]').value,
    wishes: this.querySelector('[name="wishes"]').value,
    room: document.getElementById('selectedRoom').value,
    promocode: document.getElementById('promocodeInput').value.trim() || null
  };

  try {
    const response = await fetch('/api/bookings', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify(formData)
    });

    if (response.ok) {
      btn.innerHTML = '<i class="fas fa-check me-2"></i>Заявка отправлена Рауфу Алексеевичу!';
      btn.style.background = '#25d366';
      this.reset();
      hidePriceInfo();
      setTimeout(() => {
        btn.innerHTML = originalText;
        btn.style.background = '';
        btn.disabled = false;
        bootstrap.Modal.getInstance(document.getElementById('bookingModal')).hide();
      }, 2500);
    } else {
      const errorData = await response.json();
      throw new Error(errorData.error || 'Ошибка сервера');
    }
  } catch (error) {
    console.error('Booking error:', error);
    btn.innerHTML = '<i class="fas fa-exclamation-triangle me-2"></i>Ошибка отправки';
    btn.style.background = '#c9302c';
    setTimeout(() => {
      btn.innerHTML = originalText;
      btn.style.background = '';
      btn.disabled = false;
    }, 3000);
  }
});

// Smooth scroll for nav links
document.querySelectorAll('a[href^="#"]').forEach(anchor => {
  anchor.addEventListener('click', function(e) {
    e.preventDefault();
    const target = document.querySelector(this.getAttribute('href'));
    if (target) {
      target.scrollIntoView({ behavior: 'smooth', block: 'start' });
      // Close mobile menu
      const navCollapse = document.querySelector('.navbar-collapse');
      if (navCollapse.classList.contains('show')) {
        bootstrap.Collapse.getInstance(navCollapse).hide();
      }
    }
  });
});

// Parallax effect on hero
window.addEventListener('scroll', () => {
  const hero = document.querySelector('.hero-bg');
  if (hero) {
    const scrolled = window.scrollY;
    hero.style.transform = `scale(${1 + scrolled * 0.0001}) translateY(${scrolled * 0.3}px)`;
  }
});