// Main JavaScript for CodeCanvas Noir Portfolio

class PortfolioApp {
    constructor() {
        this.init();
    }

    init() {
        this.setupScrollAnimations();
        this.setupIntersectionObserver();
        this.setupSmoothScrolling();
        this.setupProjectCards();
    }

    setupScrollAnimations() {
        // Add scroll-triggered animations
        window.addEventListener('scroll', this.handleScroll.bind(this));
    }

    setupIntersectionObserver() {
        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('animate-fade-in');
                }
            });
        }, observerOptions);

        // Observe all sections for animation
        document.querySelectorAll('section').forEach(section => {
            observer.observe(section);
        });
    }

    setupSmoothScrolling() {
        // Smooth scrolling 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) {
                    target.scrollIntoView({
                        behavior: 'smooth',
                        block: 'start'
                    });
                }
            });
        });
    }

    setupProjectCards() {
        // Add tilt effect to project cards
        const projectCards = document.querySelectorAll('.project-card');
        
        projectCards.forEach(card => {
            card.addEventListener('mousemove', this.handleTilt.bind(this));
            card.addEventListener('mouseleave', this.resetTilt.bind(this));
        });
    }

    handleTilt(e) {
        const card = e.currentTarget;
        const cardRect = card.getBoundingClientRect();
        const cardCenterX = cardRect.left + cardRect.width / 2;
        const cardCenterY = cardRect.top + cardRect.height / 2;
        
        const mouseX = e.clientX - cardCenterX;
        const mouseY = e.clientY - cardCenterY;
        
        const rotateX = (mouseY / cardRect.height) * 10;
        const rotateY = -(mouseX / cardRect.width) * 10;
        
        card.style.transform = `perspective(1000px) rotateX(${rotateX}deg) rotateY(${rotateY}deg) scale3d(1.02, 1.02, 1.02);
    }

    resetTilt(e) {
        const card = e.currentTarget;
        card.style.transform = 'perspective(1000px) rotateX(0) rotateY(0) scale3d(1, 1, 1)';
    }

    handleScroll() {
        // Update navigation active state based on scroll position
        this.updateNavigation();
    }

    updateNavigation() {
        const sections = document.querySelectorAll('section');
        const navLinks = document.querySelectorAll('nav a');
        
        let currentSection = '';
        
        sections.forEach(section => {
            const sectionTop = section.offsetTop;
            const sectionHeight = section.clientHeight;
            
            if (window.scrollY >= sectionTop - 100 && window.scrollY < sectionTop + sectionHeight - 100) {
                currentSection = section.getAttribute('id');
            }
        });
        
        navLinks.forEach(link => {
            link.classList.remove('nav-active');
            if (link.getAttribute('href') === `#${currentSection}`) {
                link.classList.add('nav-active');
            }
        });
    }

    // Utility method for debouncing
    debounce(func, wait) {
        let timeout;
        return function executedFunction(...args) {
            const later = () => {
                clearTimeout(timeout);
                func(...args);
            };
            clearTimeout(timeout);
            timeout = setTimeout(later, wait);
        };
    }
}

// Initialize the portfolio app when DOM is loaded
document.addEventListener('DOMContentLoaded', () => {
    new PortfolioApp();
});

// Handle page visibility changes for performance
document.addEventListener('visibilitychange', () => {
    if (document.hidden) {
        // Page is hidden, pause heavy animations if any
    } else {
        // Page is visible, resume animations
    }
});

// Handle resize events with debouncing
window.addEventListener('resize', debounce(() => {
    // Handle responsive adjustments
}, 250));

// Helper function for debouncing
function debounce(func, wait) {
    let timeout;
    return function executedFunction(...args) {
        const later = () => {
            clearTimeout(timeout);
            func(...args);
        };
        clearTimeout(timeout);
        timeout = setTimeout(later, wait);
    };
}