// Initialize when DOM is loaded
document.addEventListener('DOMContentLoaded', function() {
    // Initialize animations
    initScrollAnimations();
    
    // Initialize smooth scrolling
    initSmoothScroll();
    
    // Initialize contact form
    initContactForm();
    
    // Initialize theme toggle
    initThemeToggle();
});

// Scroll animations
function initScrollAnimations() {
    const observerOptions = {
        threshold: 0.1,
        rootMargin: '0px 0px -50px 0px'
    };

    const observer = new IntersectionObserver((entries) => {
        entries.forEach(entry => {
            if (entry.isIntersecting) {
                entry.target.classList.add('animated');
            }
        });
    }, observerOptions);

    // Observe all animated elements
    document.querySelectorAll('.animate-on-scroll').forEach(el => {
        observer.observe(el);
    });
}

// Smooth scrolling for anchor links
function initSmoothScroll() {
    document.querySelectorAll('a[href^="#"]').forEach(anchor => {
        anchor.addEventListener('click', function (e) {
            e.preventDefault();
            const target = document.querySelector(this.getAttribute('href'));
            if (target) {
                target.scrollIntoView({
                    behavior: 'smooth',
                    block: 'start'
                });
            }
        });
    });
}

// Contact form handling
function initContactForm() {
    const form = document.getElementById('contactForm');
    if (form) {
        form.addEventListener('submit', function(e) {
            e.preventDefault();
            
            // Get form data
            const formData = new FormData(form);
            const data = Object.fromEntries(formData);
            
            // Show success message
            showNotification('Thank you for your message! We\'ll get back to you soon.', 'success');
            
            // Reset form
            form.reset();
        });
    }
}

// Theme toggle
function initThemeToggle() {
    const themeToggle = document.getElementById('themeToggle');
    if (themeToggle) {
        themeToggle.addEventListener('click', function() {
            document.documentElement.classList.toggle('dark');
            localStorage.setItem('theme', document.documentElement.classList.contains('dark') ? 'dark' : 'light');
        });
    }

    // Load saved theme
    const savedTheme = localStorage.getItem('theme');
    if (savedTheme === 'dark' || (!savedTheme && window.matchMedia('(prefers-color-scheme: dark)').matches)) {
        document.documentElement.classList.add('dark');
    }
}

// Notification system
function showNotification(message, type = 'info') {
    const notification = document.createElement('div');
    notification.className = `fixed bottom-4 right-4 px-6 py-4 rounded-lg shadow-lg transform translate-y-full transition-transform duration-300 z-50`;
    
    // Set background color based on type
    if (type === 'success') {
        notification.classList.add('bg-green-500', 'text-white');
    } else if (type === 'error') {
        notification.classList.add('bg-red-500', 'text-white');
    } else {
        notification.classList.add('bg-blue-500', 'text-white');
    }
    
    notification.innerHTML = `
        <div class="flex items-center">
            <svg class="w-5 h-5 mr-2" fill="currentColor" viewBox="0 0 20 20">
                ${type === 'success' ? 
                    '<path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z" clip-rule="evenodd"></path>' :
                    '<path fill-rule="evenodd" d="M18 10a8 8 0 11-16 0 8 8 0 0116 0zm-7-4a1 1 0 11-2 0 1 1 0 012 0zM9 9a1 1 0 000 2v3a1 1 0 001 1h1a1 1 0 100-2v-3a1 1 0 00-1-1H9z" clip-rule="evenodd"></path>'
                }
            </svg>
            <span>${message}</span>
        </div>
    `;
    
    document.body.appendChild(notification);
    
    // Slide in
    setTimeout(() => {
        notification.style.transform = 'translateY(0)';
    }, 100);
    
    // Remove after 3 seconds
    setTimeout(() => {
        notification.style.transform = 'translateY(100%)';
        setTimeout(() => {
            notification.remove();
        }, 300);
    }, 3000);
}

// Add parallax effect to hero section
window.addEventListener('scroll', () => {
    const scrolled = window.pageYOffset;
    const parallax = document.querySelector('.hero-parallax');
    if (parallax) {
        parallax.style.transform = `translateY(${scrolled * 0.5}px)`;
    }
});

// Add hover effect to engine cards
document.querySelectorAll('.engine-card').forEach(card => {
    card.addEventListener('mouseenter', function() {
        this.style.transform = 'translateY(-10px) rotateX(5deg)';
    });
    
    card.addEventListener('mouseleave', function() {
        this.style.transform = 'translateY(0) rotateX(0)';
    });
});

// Typing effect for hero title
function typeWriter(element, text, speed = 50) {
    let i = 0;
    element.innerHTML = '';
    
    function type() {
        if (i < text.length) {
            element.innerHTML += text.charAt(i);
            i++;
            setTimeout(type, speed);
        }
    }
    
    type();
}

// Initialize typing effect when page loads
window.addEventListener('load', () => {
    const heroTitle = document.querySelector('.hero-title');
    if (heroTitle) {
        const originalText = heroTitle.textContent;
        typeWriter(heroTitle, originalText, 80);
    }
});