(function() {
  'use strict';

  // Check for reduced motion preference
  const prefersReducedMotion = window.matchMedia('(prefers-reduced-motion: reduce)').matches;

  // Set current year in footer
  const yearEl = document.getElementById('current-year');
  if (yearEl) {
    yearEl.textContent = new Date().getFullYear();
  }

  // Navigation scroll behavior
  const nav = document.querySelector('.nav');
  let lastScrollY = window.scrollY;
  let ticking = false;

  function updateNav() {
    const currentScrollY = window.scrollY;
    
    if (currentScrollY > 100) {
      nav.classList.add('nav--scrolled');
    } else {
      nav.classList.remove('nav--scrolled');
    }
    
    if (currentScrollY > lastScrollY && currentScrollY > 500) {
      nav.classList.add('nav--hidden');
    } else {
      nav.classList.remove('nav--hidden');
    }
    
    lastScrollY = currentScrollY;
    ticking = false;
  }

  window.addEventListener('scroll', function() {
    if (!ticking) {
      requestAnimationFrame(updateNav);
      ticking = true;
    }
  }, { passive: true });

  // Mobile menu toggle
  const navToggle = document.querySelector('.nav__toggle');
  const navMenu = document.querySelector('.nav__menu');

  if (navToggle && navMenu) {
    navToggle.addEventListener('click', function() {
      const isExpanded = this.getAttribute('aria-expanded') === 'true';
      this.setAttribute('aria-expanded', !isExpanded);
      navMenu.classList.toggle('is-open');
    });

    // Close mobile menu on link click
    navMenu.querySelectorAll('a').forEach(link => {
      link.addEventListener('click', function() {
        navToggle.setAttribute('aria-expanded', 'false');
        navMenu.classList.remove('is-open');
      });
    });
  }

  // Fade out scroll indicator after delay
  const heroScroll = document.querySelector('.hero__scroll');
  if (heroScroll && !prefersReducedMotion) {
    setTimeout(() => {
      heroScroll.classList.add('is-faded');
    }, 4000);
  }

  // Reveal animations with Intersection Observer
  const revealElements = document.querySelectorAll('.reveal');
  
  if (prefersReducedMotion) {
    // Show all elements immediately if reduced motion is preferred
    revealElements.forEach(el => {
      el.classList.add('is-visible');
    });
  } else {
    let revealDelay = 0;
    
    const revealObserver = new IntersectionObserver((entries) => {
      entries.forEach((entry) => {
        if (entry.isIntersecting) {
          // Use a stagger based on when elements enter viewport
          setTimeout(() => {
            entry.target.classList.add('is-visible');
          }, revealDelay);
          revealDelay += 80;
          
          // Reset delay after a batch
          setTimeout(() => {
            revealDelay = 0;
          }, 500);
          
          revealObserver.unobserve(entry.target);
        }
      });
    }, {
      threshold: 0.15,
      rootMargin: '0px 0px -40px 0px'
    });

    revealElements.forEach(el => revealObserver.observe(el));
  }

  // Animated counters
  function animateCounter(element, target, duration = 1800) {
    if (prefersReducedMotion) {
      element.textContent = target;
      return;
    }

    const start = performance.now();
    
    function updateCounter(currentTime) {
      const elapsed = currentTime - start;
      const progress = Math.min(elapsed / duration, 1);
      
      // Ease out cubic
      const easeOut = 1 - Math.pow(1 - progress, 3);
      const current = Math.floor(easeOut * target);
      
      element.textContent = current;
      
      if (progress < 1) {
        requestAnimationFrame(updateCounter);
      } else {
        element.textContent = target;
      }
    }
    
    requestAnimationFrame(updateCounter);
  }

  const statNumbers = document.querySelectorAll('.stat__number');
  
  const statsObserver = new IntersectionObserver((entries) => {
    entries.forEach(entry => {
      if (entry.isIntersecting) {
        const target = parseInt(entry.target.dataset.target, 10);
        animateCounter(entry.target, target);
        statsObserver.unobserve(entry.target);
      }
    });
  }, {
    threshold: 0.5
  });

  statNumbers.forEach(stat => statsObserver.observe(stat));

  // Smooth scroll for anchor links
  document.querySelectorAll('a[href^="#"]').forEach(anchor => {
    anchor.addEventListener('click', function(e) {
      const href = this.getAttribute('href');
      if (href === '#') return;
      
      e.preventDefault();
      const target = document.querySelector(href);
      
      if (target) {
        const navHeight = nav ? nav.offsetHeight : 0;
        const targetPosition = target.getBoundingClientRect().top + window.scrollY - navHeight - 20;
        
        window.scrollTo({
          top: targetPosition,
          behavior: prefersReducedMotion ? 'auto' : 'smooth'
        });
        
        // Set focus for accessibility
        target.setAttribute('tabindex', '-1');
        target.focus({ preventScroll: true });
      }
    });
  });

  // Hero title animation
  if (!prefersReducedMotion) {
    const heroTitle = document.querySelector('.hero__title');
    if (heroTitle) {
      heroTitle.style.opacity = '0';
      heroTitle.style.transform = 'translateY(30px)';
      
      setTimeout(() => {
        heroTitle.style.transition = 'opacity 0.8s ease, transform 0.8s ease';
        heroTitle.style.opacity = '1';
        heroTitle.style.transform = 'translateY(0)';
      }, 200);
    }
  }

  // Email validation helper
  function isValidEmail(email) {
    return /^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(email);
  }

  // Form submission handling
  const contactForm = document.querySelector('.contact__form');
  const formStatus = document.querySelector('.form-status');
  
  if (contactForm && formStatus) {
    const nameInput = document.getElementById('name');
    const emailInput = document.getElementById('email');
    const nameError = document.getElementById('name-error');
    const emailError = document.getElementById('email-error');

    // Clear error on input
    if (nameInput && nameError) {
      nameInput.addEventListener('input', function() {
        this.removeAttribute('aria-invalid');
        nameError.textContent = '';
      });
    }

    if (emailInput && emailError) {
      emailInput.addEventListener('input', function() {
        this.removeAttribute('aria-invalid');
        emailError.textContent = '';
      });
    }

    contactForm.addEventListener('submit', function(e) {
      e.preventDefault();
      
      const submitBtn = this.querySelector('.form-submit');
      const originalText = submitBtn.textContent;
      let isValid = true;
      
      // Validate name
      if (nameInput && !nameInput.value.trim()) {
        isValid = false;
        nameInput.setAttribute('aria-invalid', 'true');
        if (nameError) nameError.textContent = 'נא להזין שם מלא';
      }
      
      // Validate email
      if (emailInput) {
        if (!emailInput.value.trim()) {
          isValid = false;
          emailInput.setAttribute('aria-invalid', 'true');
          if (emailError) emailError.textContent = 'נא להזין כתובת דוא״ל';
        } else if (!isValidEmail(emailInput.value.trim())) {
          isValid = false;
          emailInput.setAttribute('aria-invalid', 'true');
          if (emailError) emailError.textContent = 'כתובת דוא״ל לא תקינה';
        }
      }
      
      if (!isValid) {
        formStatus.textContent = 'נא לתקן את השגיאות בטופס';
        formStatus.className = 'form-status form-status--error';
        return;
      }
      
      submitBtn.textContent = 'שולח...';
      submitBtn.disabled = true;
      formStatus.textContent = '';
      
      // Simulate form submission
      setTimeout(() => {
        submitBtn.textContent = 'נשלח בהצלחה! ✓';
        submitBtn.style.background = 'var(--tertiary)';
        formStatus.textContent = 'ההודעה נשלחה בהצלחה. ניצור איתכם קשר בהקדם.';
        formStatus.className = 'form-status form-status--success';
        
        setTimeout(() => {
          submitBtn.textContent = originalText;
          submitBtn.style.background = '';
          submitBtn.disabled = false;
          contactForm.reset();
          formStatus.textContent = '';
          formStatus.className = 'form-status';
        }, 4000);
      }, 1500);
    });
  }

  // Keyboard navigation enhancement
  document.addEventListener('keydown', function(e) {
    if (e.key === 'Escape' && navToggle && navMenu) {
      navToggle.setAttribute('aria-expanded', 'false');
      navMenu.classList.remove('is-open');
    }
  });

  // Detect scroll on table
  const tableWrap = document.querySelector('.schedule__table-wrap');
  const scrollHint = document.querySelector('.schedule__scroll-hint');
  
  if (tableWrap && scrollHint) {
    tableWrap.addEventListener('scroll', function() {
      if (this.scrollLeft > 10) {
        scrollHint.style.opacity = '0';
      } else {
        scrollHint.style.opacity = '1';
      }
    }, { passive: true });
  }

})();