// Mobile Menu Toggle
const mobileToggle = document.getElementById('mobileToggle');
const navMenu = document.getElementById('navMenu');

mobileToggle.addEventListener('click', () => {
    navMenu.classList.toggle('active');
    
    // Animate hamburger to X
    const spans = mobileToggle.querySelectorAll('span');
    if (navMenu.classList.contains('active')) {
        spans[0].style.transform = 'rotate(45deg) translate(5px, 5px)';
        spans[1].style.opacity = '0';
        spans[2].style.transform = 'rotate(-45deg) translate(7px, -6px)';
    } else {
        spans[0].style.transform = 'none';
        spans[1].style.opacity = '1';
        spans[2].style.transform = 'none';
    }
});

// Close mobile menu when clicking on a link
const navLinks = document.querySelectorAll('.nav-link');
navLinks.forEach(link => {
    link.addEventListener('click', () => {
        navMenu.classList.remove('active');
        const spans = mobileToggle.querySelectorAll('span');
        spans[0].style.transform = 'none';
        spans[1].style.opacity = '1';
        spans[2].style.transform = 'none';
    });
});

// Navbar scroll effect
const nav = document.getElementById('nav');
let lastScroll = 0;

window.addEventListener('scroll', () => {
    const currentScroll = window.pageYOffset;
    
    if (currentScroll > 50) {
        nav.classList.add('scrolled');
    } else {
        nav.classList.remove('scrolled');
    }
    
    lastScroll = currentScroll;
});

// 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: 'smooth'
            });
        }
    });
});

// Animate on Scroll (AOS) implementation
function initAOS() {
    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('aos-animate');
            }
        });
    }, observerOptions);

    // Observe all elements with data-aos attribute
    document.querySelectorAll('[data-aos]').forEach(element => {
        observer.observe(element);
    });
}

// Initialize AOS when DOM is loaded
document.addEventListener('DOMContentLoaded', initAOS);

// Animate skill bars when they come into view
const skillObserver = new IntersectionObserver((entries) => {
    entries.forEach(entry => {
        if (entry.isIntersecting) {
            const progressBars = entry.target.querySelectorAll('.skill-progress');
            progressBars.forEach(bar => {
                const width = bar.style.width;
                bar.style.width = '0';
                setTimeout(() => {
                    bar.style.width = width;
                }, 100);
            });
            skillObserver.unobserve(entry.target);
        }
    });
}, { threshold: 0.5 });

const skillsSection = document.querySelector('.skills');
if (skillsSection) {
    skillObserver.observe(skillsSection);
}

// Contact Form Handling
const contactForm = document.getElementById('contactForm');

contactForm.addEventListener('submit', (e) => {
    e.preventDefault();
    
    // Get form data
    const formData = {
        name: document.getElementById('name').value,
        email: document.getElementById('email').value,
        subject: document.getElementById('subject').value,
        message: document.getElementById('message').value
    };
    
    // In a real application, you would send this data to a server
    console.log('Form submitted:', formData);
    
    // Show success message
    showNotification('Thank you for your message! I\'ll get back to you soon.', 'success');
    
    // Reset form
    contactForm.reset();
});

// Notification function
function showNotification(message, type = 'info') {
    const notification = document.createElement('div');
    notification.className = `notification notification-${type}`;
    notification.textContent = message;
    
    notification.style.cssText = `
        position: fixed;
        top: 100px;
        right: 20px;
        background: ${type === 'success' ? '#10b981' : '#3b82f6'};
        color: white;
        padding: 1rem 1.5rem;
        border-radius: 8px;
        box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
        z-index: 10000;
        animation: slideIn 0.3s ease;
    `;
    
    document.body.appendChild(notification);
    
    setTimeout(() => {
        notification.style.animation = 'slideOut 0.3s ease';
        setTimeout(() => {
            document.body.removeChild(notification);
        }, 300);
    }, 3000);
}

// Add animation keyframes
const style = document.createElement('style');
style.textContent = `
    @keyframes slideIn {
        from {
            transform: translateX(400px);
            opacity: 0;
        }
        to {
            transform: translateX(0);
            opacity: 1;
        }
    }
    
    @keyframes slideOut {
        from {
            transform: translateX(0);
            opacity: 1;
        }
        to {
            transform: translateX(400px);
            opacity: 0;
        }
    }
`;
document.head.appendChild(style);

// Parallax effect for hero section
window.addEventListener('scroll', () => {
    const scrolled = window.pageYOffset;
    const hero = document.querySelector('.hero');
    
    if (hero && scrolled < window.innerHeight) {
        const parallaxElements = hero.querySelectorAll('.floating-card');
        parallaxElements.forEach((element, index) => {
            const speed = 0.5 + (index * 0.1);
            element.style.transform = `translateY(${scrolled * speed}px)`;
        });
    }
});

// Add active state to navigation based on scroll position
window.addEventListener('scroll', () => {
    const sections = document.querySelectorAll('section[id]');
    const scrollY = window.pageYOffset;
    
    sections.forEach(section => {
        const sectionHeight = section.offsetHeight;
        const sectionTop = section.offsetTop - 100;
        const sectionId = section.getAttribute('id');
        const navLink = document.querySelector(`.nav-link[href="#${sectionId}"]`);
        
        if (navLink && scrollY > sectionTop && scrollY <= sectionTop + sectionHeight) {
            document.querySelectorAll('.nav-link').forEach(link => {
                link.style.color = '';
            });
            navLink.style.color = 'var(--primary-color)';
        }
    });
});

// Preload animation for page load
window.addEventListener('load', () => {
    document.body.style.opacity = '0';
    setTimeout(() => {
        document.body.style.transition = 'opacity 0.5s ease';
        document.body.style.opacity = '1';
    }, 100);
});