(function() {
  'use strict';

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

  // Reveal on scroll
  if (!prefersReducedMotion) {
    const revealElements = document.querySelectorAll('.reveal');
    
    const revealObserver = new IntersectionObserver((entries) => {
      entries.forEach((entry) => {
        if (entry.isIntersecting) {
          entry.target.classList.add('revealed');
          revealObserver.unobserve(entry.target);
        }
      });
    }, {
      threshold: 0.1,
      rootMargin: '0px 0px -30px 0px'
    });

    revealElements.forEach(el => revealObserver.observe(el));
  } else {
    document.querySelectorAll('.reveal').forEach(el => {
      el.classList.add('revealed');
    });
  }

  // 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 nav = document.querySelector('.nav');
        const navHeight = nav ? nav.offsetHeight : 0;
        const targetPosition = target.getBoundingClientRect().top + window.pageYOffset - navHeight;
        
        window.scrollTo({
          top: targetPosition,
          behavior: prefersReducedMotion ? 'auto' : 'smooth'
        });
      }
    });
  });

  // Form handling
  const form = document.querySelector('.contact__form');
  if (form) {
    form.addEventListener('submit', function(e) {
      e.preventDefault();
      
      const formData = new FormData(form);
      const data = Object.fromEntries(formData);
      
      // Clear previous errors
      clearFormErrors();
      
      // Basic validation
      let hasErrors = false;
      
      if (!data.name || data.name.trim().length < 2) {
        showFieldError('name', 'אנא הזינו שם מלא');
        hasErrors = true;
      }

      // Phone validation (Israeli format)
      const phoneRegex = /^0[0-9]{8,9}$/;
      const cleanPhone = data.phone ? data.phone.replace(/[-\s]/g, '') : '';
      if (!phoneRegex.test(cleanPhone)) {
        showFieldError('phone', 'אנא הזינו מספר טלפון תקין');
        hasErrors = true;
      }

      if (hasErrors) return;

      // Simulate form submission
      const submitBtn = form.querySelector('button[type="submit"]');
      const originalText = submitBtn.textContent;
      submitBtn.textContent = 'שולח...';
      submitBtn.disabled = true;

      setTimeout(() => {
        showFormMessage('תודה! קיבלתי את הפנייה ואחזור אליכם בהקדם.', 'success');
        form.reset();
        submitBtn.textContent = originalText;
        submitBtn.disabled = false;
      }, 800);
    });
  }

  function showFieldError(fieldId, message) {
    const field = document.getElementById(fieldId);
    if (!field) return;
    
    field.style.borderColor = '#e57373';
    
    const errorEl = document.createElement('span');
    errorEl.className = 'field-error';
    errorEl.textContent = message;
    errorEl.style.cssText = `
      display: block;
      color: #e57373;
      font-size: 0.8rem;
      margin-top: 0.25rem;
    `;
    
    field.parentNode.appendChild(errorEl);
  }

  function clearFormErrors() {
    const errors = form.querySelectorAll('.field-error');
    errors.forEach(el => el.remove());
    
    const inputs = form.querySelectorAll('.form-input');
    inputs.forEach(input => {
      input.style.borderColor = '';
    });
    
    const msg = form.querySelector('.form-message');
    if (msg) msg.remove();
  }

  function showFormMessage(message, type) {
    const existingMsg = document.querySelector('.form-message');
    if (existingMsg) existingMsg.remove();

    const msgEl = document.createElement('div');
    msgEl.className = `form-message form-message--${type}`;
    msgEl.textContent = message;
    msgEl.setAttribute('role', 'alert');
    msgEl.style.cssText = `
      padding: 1rem;
      margin-bottom: 1rem;
      border-radius: 8px;
      font-size: 0.9rem;
      text-align: center;
      background: ${type === 'success' ? 'rgba(129, 199, 132, 0.1)' : 'rgba(229, 115, 115, 0.1)'};
      color: ${type === 'success' ? '#81c784' : '#e57373'};
      border: 1px solid ${type === 'success' ? '#81c784' : '#e57373'};
    `;

    form.insertBefore(msgEl, form.firstChild);

    if (type === 'success') {
      setTimeout(() => {
        if (msgEl.parentNode) msgEl.remove();
      }, 6000);
    }
  }

  // Nav background on scroll
  const nav = document.querySelector('.nav');
  if (nav) {
    window.addEventListener('scroll', () => {
      const currentScroll = window.pageYOffset;
      
      if (currentScroll > 50) {
        nav.style.background = 'rgba(15, 15, 15, 0.98)';
      } else {
        nav.style.background = 'rgba(15, 15, 15, 0.9)';
      }
    }, { passive: true });
  }

})();