(function() {
  'use strict';

  // Scroll reveal with staggered animations
  const revealElements = document.querySelectorAll('.reveal');
  
  if ('IntersectionObserver' in window) {
    const revealObserver = new IntersectionObserver((entries) => {
      entries.forEach((entry) => {
        if (entry.isIntersecting) {
          entry.target.classList.add('visible');
          revealObserver.unobserve(entry.target);
        }
      });
    }, {
      threshold: 0.1,
      rootMargin: '0px 0px -40px 0px'
    });

    revealElements.forEach((el) => {
      revealObserver.observe(el);
    });
  } else {
    // Fallback for browsers without IntersectionObserver
    revealElements.forEach((el) => {
      el.classList.add('visible');
    });
  }

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

  // Form handling
  const contactForm = document.getElementById('contactForm');
  const formFeedback = document.getElementById('formFeedback');
  
  function showFeedback(message, isSuccess) {
    formFeedback.textContent = message;
    formFeedback.className = 'form-feedback ' + (isSuccess ? 'success' : 'error');
  }
  
  function clearFeedback() {
    formFeedback.textContent = '';
    formFeedback.className = 'form-feedback';
  }
  
  if (contactForm) {
    contactForm.addEventListener('submit', function(e) {
      e.preventDefault();
      clearFeedback();
      
      const formData = new FormData(this);
      const name = formData.get('name').trim();
      const phone = formData.get('phone').trim();
      
      // Validation
      if (!name) {
        showFeedback('אנא הזינו את שמכם', false);
        document.getElementById('name').focus();
        return;
      }
      
      if (!phone) {
        showFeedback('אנא הזינו מספר טלפון', false);
        document.getElementById('phone').focus();
        return;
      }
      
      // Phone validation (Israeli format)
      const phoneRegex = /^0[0-9]{8,9}$/;
      const cleanPhone = phone.replace(/[-\s]/g, '');
      
      if (!phoneRegex.test(cleanPhone)) {
        showFeedback('אנא הזינו מספר טלפון ישראלי תקין', false);
        document.getElementById('phone').focus();
        return;
      }
      
      // Simulate form submission
      const submitBtn = this.querySelector('button[type="submit"]');
      const originalText = submitBtn.textContent;
      
      submitBtn.disabled = true;
      submitBtn.textContent = 'שולח...';
      
      // In production, replace with actual form submission
      setTimeout(() => {
        contactForm.reset();
        submitBtn.disabled = false;
        submitBtn.textContent = originalText;
        
        showFeedback('תודה! פנייתכם התקבלה. אחזור אליכם בהקדם.', true);
        
        setTimeout(() => {
          clearFeedback();
        }, 5000);
      }, 1000);
    });
    
    // Clear feedback when user starts typing
    contactForm.querySelectorAll('input, textarea').forEach(function(field) {
      field.addEventListener('input', clearFeedback);
    });
  }

  // Header scroll effect
  const header = document.querySelector('.site-header');
  let lastScrollY = 0;
  
  if (header) {
    function updateHeaderShadow() {
      if (window.pageYOffset > 100) {
        header.style.boxShadow = 'var(--shadow)';
      } else {
        header.style.boxShadow = 'none';
      }
      lastScrollY = window.pageYOffset;
    }
    
    window.addEventListener('scroll', updateHeaderShadow, { passive: true });
    updateHeaderShadow();
  }

})();