(function() {
  'use strict';

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

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

  // Custom cursor
  const cursor = document.querySelector('.cursor-follower');
  let mouseX = 0, mouseY = 0;
  let cursorX = 0, cursorY = 0;
  let cursorVisible = false;
  let animationFrameId = null;

  if (cursor && !prefersReducedMotion && window.matchMedia('(pointer: fine)').matches) {
    function startCursorAnimation() {
      if (animationFrameId) return;
      animateCursor();
    }

    function stopCursorAnimation() {
      if (animationFrameId) {
        cancelAnimationFrame(animationFrameId);
        animationFrameId = null;
      }
    }

    document.addEventListener('mousemove', (e) => {
      mouseX = e.clientX;
      mouseY = e.clientY;
      if (!cursorVisible) {
        cursorVisible = true;
        cursor.classList.add('active');
        startCursorAnimation();
      }
    });

    document.addEventListener('mouseleave', () => {
      cursorVisible = false;
      cursor.classList.remove('active');
      stopCursorAnimation();
    });

    const interactiveElements = document.querySelectorAll('a, button, input, textarea, [tabindex]');
    interactiveElements.forEach(el => {
      el.addEventListener('mouseenter', () => cursor.classList.add('hover'));
      el.addEventListener('mouseleave', () => cursor.classList.remove('hover'));
    });

    function animateCursor() {
      const ease = 0.15;
      cursorX += (mouseX - cursorX) * ease;
      cursorY += (mouseY - cursorY) * ease;
      cursor.style.left = cursorX + 'px';
      cursor.style.top = cursorY + 'px';
      if (cursorVisible) {
        animationFrameId = requestAnimationFrame(animateCursor);
      }
    }
  }

  // Navigation scroll effect
  const nav = document.querySelector('.main-nav');

  window.addEventListener('scroll', () => {
    if (window.scrollY > 50) {
      nav.classList.add('scrolled');
    } else {
      nav.classList.remove('scrolled');
    }
  }, { passive: true });

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

  if (navToggle && navLinks) {
    navToggle.addEventListener('click', () => {
      const isOpen = navToggle.getAttribute('aria-expanded') === 'true';
      navToggle.setAttribute('aria-expanded', !isOpen);
      navLinks.classList.toggle('open');
      document.body.style.overflow = isOpen ? '' : 'hidden';
    });

    navLinks.querySelectorAll('a').forEach(link => {
      link.addEventListener('click', () => {
        navToggle.setAttribute('aria-expanded', 'false');
        navLinks.classList.remove('open');
        document.body.style.overflow = '';
      });
    });

    // Close on escape
    document.addEventListener('keydown', (e) => {
      if (e.key === 'Escape' && navLinks.classList.contains('open')) {
        navToggle.setAttribute('aria-expanded', 'false');
        navLinks.classList.remove('open');
        document.body.style.overflow = '';
        navToggle.focus();
      }
    });
  }

  // Reveal animations with Intersection Observer
  if (!prefersReducedMotion) {
    const reveals = document.querySelectorAll('.reveal');
    let revealDelay = 0;
    
    const revealObserver = new IntersectionObserver((entries) => {
      entries.forEach((entry) => {
        if (entry.isIntersecting) {
          setTimeout(() => {
            entry.target.classList.add('visible');
          }, revealDelay);
          revealDelay += 80;
          setTimeout(() => { revealDelay = 0; }, 500);
          revealObserver.unobserve(entry.target);
        }
      });
    }, {
      threshold: 0.1,
      rootMargin: '0px 0px -50px 0px'
    });

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

  // Smooth scroll for anchor links
  document.querySelectorAll('a[href^="#"]').forEach(anchor => {
    anchor.addEventListener('click', function(e) {
      e.preventDefault();
      const target = document.querySelector(this.getAttribute('href'));
      if (target) {
        const offsetTop = target.offsetTop - 80;
        window.scrollTo({
          top: offsetTop,
          behavior: prefersReducedMotion ? 'auto' : 'smooth'
        });
        // Move focus to target for accessibility
        target.setAttribute('tabindex', '-1');
        target.focus({ preventScroll: true });
      }
    });
  });

  // Form handling with validation
  const contactForm = document.getElementById('contact-form');
  if (contactForm) {
    const nameInput = contactForm.querySelector('#name');
    const emailInput = contactForm.querySelector('#email');

    function validateField(input, errorEl) {
      let isValid = true;
      let message = '';

      if (input.required && !input.value.trim()) {
        isValid = false;
        message = 'שדה חובה';
      } else if (input.type === 'email' && input.value) {
        const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
        if (!emailRegex.test(input.value)) {
          isValid = false;
          message = 'כתובת דוא״ל לא תקינה';
        }
      }

      if (errorEl) {
        errorEl.textContent = message;
      }
      input.classList.toggle('error', !isValid);
      return isValid;
    }

    [nameInput, emailInput].forEach(input => {
      if (input) {
        const errorEl = input.parentElement.querySelector('.error-message');
        input.addEventListener('blur', () => validateField(input, errorEl));
        input.addEventListener('input', () => {
          if (input.classList.contains('error')) {
            validateField(input, errorEl);
          }
        });
      }
    });

    contactForm.addEventListener('submit', function(e) {
      e.preventDefault();
      
      const nameError = nameInput.parentElement.querySelector('.error-message');
      const emailError = emailInput.parentElement.querySelector('.error-message');
      
      const nameValid = validateField(nameInput, nameError);
      const emailValid = validateField(emailInput, emailError);

      if (!nameValid || !emailValid) {
        const firstInvalid = contactForm.querySelector('.error');
        if (firstInvalid) firstInvalid.focus();
        return;
      }

      const btn = this.querySelector('.submit-btn');
      const btnText = btn.querySelector('span');
      const status = this.querySelector('.form-status');
      const originalText = btnText.textContent;

      btnText.textContent = 'שולח...';
      btn.disabled = true;

      // Simulate submission
      setTimeout(() => {
        btnText.textContent = 'נשלח בהצלחה!';
        btn.classList.add('success');
        status.textContent = 'תודה! נחזור אליכם בהקדם.';
        
        setTimeout(() => {
          btnText.textContent = originalText;
          btn.classList.remove('success');
          btn.disabled = false;
          status.textContent = '';
          contactForm.reset();
          // Clear any error states
          contactForm.querySelectorAll('.error').forEach(el => el.classList.remove('error'));
          contactForm.querySelectorAll('.error-message').forEach(el => el.textContent = '');
        }, 3000);
      }, 1500);
    });
  }

  // Kanji rotation on scroll (only if motion is allowed)
  if (!prefersReducedMotion) {
    const kanji = document.querySelector('.kanji-overlay');
    const aboutSection = document.querySelector('.about');
    
    if (kanji && aboutSection) {
      const kanjiObserver = new IntersectionObserver((entries) => {
        entries.forEach(entry => {
          if (entry.isIntersecting) {
            window.addEventListener('scroll', handleKanjiScroll, { passive: true });
          } else {
            window.removeEventListener('scroll', handleKanjiScroll);
          }
        });
      }, { threshold: 0 });
      
      function handleKanjiScroll() {
        const rect = aboutSection.getBoundingClientRect();
        const progress = 1 - (rect.bottom / (window.innerHeight + rect.height));
        const rotation = Math.max(0, Math.min(progress * 10, 10));
        const isRTL = document.documentElement.dir === 'rtl';
        const translateX = isRTL ? '50%' : '-50%';
        kanji.style.transform = `translate(${translateX}, -50%) rotate(${rotation}deg)`;
      }
      
      kanjiObserver.observe(aboutSection);
    }
  }

})();