(function() {
  'use strict';

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

  // Header scroll effect
  const header = document.querySelector('.site-header');

  function handleHeaderScroll() {
    if (window.scrollY > 50) {
      header.classList.add('scrolled');
    } else {
      header.classList.remove('scrolled');
    }
  }

  window.addEventListener('scroll', handleHeaderScroll, { passive: true });

  // Mobile navigation
  const mobileToggle = document.querySelector('.mobile-toggle');
  const navLinks = document.querySelector('.nav-links');

  function closeMobileNav() {
    navLinks.classList.remove('open');
    mobileToggle.classList.remove('open');
    mobileToggle.setAttribute('aria-expanded', 'false');
    mobileToggle.setAttribute('aria-label', 'פתח תפריט ניווט');
  }

  function openMobileNav() {
    navLinks.classList.add('open');
    mobileToggle.classList.add('open');
    mobileToggle.setAttribute('aria-expanded', 'true');
    mobileToggle.setAttribute('aria-label', 'סגור תפריט ניווט');
  }

  mobileToggle.addEventListener('click', function() {
    const isOpen = navLinks.classList.contains('open');
    if (isOpen) {
      closeMobileNav();
    } else {
      openMobileNav();
    }
  });

  navLinks.querySelectorAll('a').forEach(function(link) {
    link.addEventListener('click', closeMobileNav);
  });

  // Close mobile nav on escape
  document.addEventListener('keydown', function(e) {
    if (e.key === 'Escape' && navLinks.classList.contains('open')) {
      closeMobileNav();
      mobileToggle.focus();
    }
  });

  // Smooth scroll for anchor links
  document.querySelectorAll('a[href^="#"]').forEach(function(anchor) {
    anchor.addEventListener('click', function(e) {
      const targetId = this.getAttribute('href');
      if (targetId === '#') return;
      
      const target = document.querySelector(targetId);
      if (target) {
        e.preventDefault();
        const headerOffset = 80;
        const elementPosition = target.getBoundingClientRect().top;
        const offsetPosition = elementPosition + window.scrollY - headerOffset;

        window.scrollTo({
          top: offsetPosition,
          behavior: prefersReducedMotion ? 'auto' : 'smooth'
        });

        // Set focus to target for accessibility
        target.setAttribute('tabindex', '-1');
        target.focus({ preventScroll: true });
      }
    });
  });

  // Contact form handling
  const contactForm = document.getElementById('contactForm');
  const formSuccess = document.getElementById('formSuccess');
  const successClose = document.getElementById('successClose');
  const nameInput = document.getElementById('name');
  const phoneInput = document.getElementById('phone');
  const nameError = document.getElementById('nameError');
  const phoneError = document.getElementById('phoneError');

  function validateName() {
    const value = nameInput.value.trim();
    if (!value) {
      nameInput.classList.add('error');
      nameError.textContent = 'נא להזין שם';
      return false;
    }
    nameInput.classList.remove('error');
    nameError.textContent = '';
    return true;
  }

  function validatePhone() {
    const value = phoneInput.value.replace(/\D/g, '');
    if (!value || value.length < 9) {
      phoneInput.classList.add('error');
      phoneError.textContent = 'נא להזין מספר טלפון תקין';
      return false;
    }
    phoneInput.classList.remove('error');
    phoneError.textContent = '';
    return true;
  }

  nameInput.addEventListener('blur', validateName);
  phoneInput.addEventListener('blur', validatePhone);

  contactForm.addEventListener('submit', function(e) {
    e.preventDefault();

    const isNameValid = validateName();
    const isPhoneValid = validatePhone();

    if (!isNameValid || !isPhoneValid) {
      if (!isNameValid) {
        nameInput.focus();
      } else {
        phoneInput.focus();
      }
      return;
    }

    const submitBtn = contactForm.querySelector('.btn-submit');
    const originalText = submitBtn.innerHTML;
    submitBtn.innerHTML = '<span>שולח...</span>';
    submitBtn.disabled = true;

    // Simulate form submission
    setTimeout(function() {
      submitBtn.innerHTML = originalText;
      submitBtn.disabled = false;
      formSuccess.hidden = false;
      contactForm.reset();
      
      successClose.focus();
    }, 1200);
  });

  function closeSuccessModal() {
    formSuccess.hidden = true;
  }

  successClose.addEventListener('click', closeSuccessModal);
  
  formSuccess.addEventListener('click', function(e) {
    if (e.target === formSuccess) {
      closeSuccessModal();
    }
  });

  document.addEventListener('keydown', function(e) {
    if (e.key === 'Escape' && !formSuccess.hidden) {
      closeSuccessModal();
    }
  });

  // Phone number formatting
  phoneInput.addEventListener('input', function(e) {
    let value = e.target.value.replace(/\D/g, '');
    
    if (value.length > 10) {
      value = value.slice(0, 10);
    }
    
    if (value.length > 3 && value.length <= 6) {
      value = value.slice(0, 3) + '-' + value.slice(3);
    } else if (value.length > 6) {
      value = value.slice(0, 3) + '-' + value.slice(3, 6) + '-' + value.slice(6);
    }
    
    e.target.value = value;
  });

  // Keyboard navigation detection
  document.body.addEventListener('keydown', function(e) {
    if (e.key === 'Tab') {
      document.body.classList.add('keyboard-nav');
    }
  });

  document.body.addEventListener('mousedown', function() {
    document.body.classList.remove('keyboard-nav');
  });

})();