// Initialize animations and interactions
document.addEventListener('DOMContentLoaded', function() {
    // Reveal animations on scroll
    const reveals = document.querySelectorAll('.reveal');
    
    function checkReveal() {
        reveals.forEach(element => {
            const windowHeight = window.innerHeight;
            const elementTop = element.getBoundingClientRect().top;
            const elementVisible = 150;
            
            if (elementTop < windowHeight - elementVisible) {
                element.classList.add('active');
            }
        });
    }
    
    window.addEventListener('scroll', checkReveal);
    checkReveal();
    
    // 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) {
                target.scrollIntoView({
                    behavior: 'smooth',
                    block: 'start'
                });
            }
        });
    });
    
    // Parallax effect
    const parallaxElements = document.querySelectorAll('.parallax');
    
    window.addEventListener('scroll', () => {
        const scrolled = window.pageYOffset;
        
        parallaxElements.forEach(element => {
            const speed = element.dataset.speed || 0.5;
            element.style.transform = `translateY(${scrolled * speed}px)`;
        });
    });
    
    // Counter animation
    const counters = document.querySelectorAll('[data-counter]');
    const speed = 200;
    
    const countUp = () => {
        counters.forEach(counter => {
            const updateCount = () => {
                const target = +counter.getAttribute('data-counter');
                const count = +counter.innerText;
                const inc = target / speed;
                
                if (count < target) {
                    counter.innerText = Math.ceil(count + inc);
                    setTimeout(updateCount, 1);
                } else {
                    counter.innerText = target;
                }
            };
            
            updateCount();
        });
    };
    
    // Trigger counter animation when in view
    const observerOptions = {
        threshold: 0.5
    };
    
    const observer = new IntersectionObserver((entries) => {
        entries.forEach(entry => {
            if (entry.isIntersecting) {
                countUp();
                observer.unobserve(entry.target);
            }
        });
    }, observerOptions);
    
    counters.forEach(counter => {
        observer.observe(counter);
    });
    
    // Interactive hover effects
    const cards = document.querySelectorAll('.card-hover');
    
    cards.forEach(card => {
        card.addEventListener('mousemove', (e) => {
            const rect = card.getBoundingClientRect();
            const x = e.clientX - rect.left;
            const y = e.clientY - rect.top;
            
            const centerX = rect.width / 2;
            const centerY = rect.height / 2;
            
            const rotateX = (y - centerY) / 10;
            const rotateY = (centerX - x) / 10;
            
            card.style.transform = `perspective(1000px) rotateX(${rotateX}deg) rotateY(${rotateY}deg) scale3d(1.05, 1.05, 1.05)`;
        });
        
        card.addEventListener('mouseleave', () => {
            card.style.transform = 'perspective(1000px) rotateX(0) rotateY(0) scale3d(1, 1, 1)';
        });
    });
    
    // Form validation
    const forms = document.querySelectorAll('form');
    
    forms.forEach(form => {
        form.addEventListener('submit', (e) => {
            e.preventDefault();
            
            const formData = new FormData(form);
            const data = Object.fromEntries(formData);
            
            // Basic validation
            let isValid = true;
            const requiredFields = form.querySelectorAll('[required]');
            
            requiredFields.forEach(field => {
                if (!field.value.trim()) {
                    field.classList.add('border-red-500');
                    isValid = false;
                } else {
                    field.classList.remove('border-red-500');
                }
            });
            
            if (isValid) {
                // Show success message
                const successMessage = document.createElement('div');
                successMessage.className = 'fixed top-4 right-4 bg-green-500 text-white px-6 py-3 rounded-lg shadow-lg z-50';
                successMessage.textContent = 'Form submitted successfully!';
                document.body.appendChild(successMessage);
                
                setTimeout(() => {
                    successMessage.remove();
                }, 3000);
                
                form.reset();
            }
        });
    });
    
    // Dynamic year in footer
    const yearElements = document.querySelectorAll('[data-year]');
    const currentYear = new Date().getFullYear();
    
    yearElements.forEach(element => {
        element.textContent = currentYear;
    });
    
    // Theme switcher
    const themeToggle = document.querySelector('[data-theme-toggle]');
    
    if (themeToggle) {
        themeToggle.addEventListener('click', () => {
            document.body.classList.toggle('dark');
            const isDark = document.body.classList.contains('dark');
            localStorage.setItem('theme', isDark ? 'dark' : 'light');
        });
        
        // Load saved theme
        const savedTheme = localStorage.getItem('theme');
        if (savedTheme === 'dark') {
            document.body.classList.add('dark');
        }
    }
});

// Utility functions
const utils = {
    debounce: (func, wait) => {
        let timeout;
        return function executedFunction(...args) {
            const later = () => {
                clearTimeout(timeout);
                func(...args);
            };
            clearTimeout(timeout);
            timeout = setTimeout(later, wait);
        };
    },
    
    throttle: (func, limit) => {
        let inThrottle;
        return function(...args) {
            if (!inThrottle) {
                func.apply(this, args);
                inThrottle = true;
                setTimeout(() => inThrottle = false, limit);
            }
        };
    },
    
    animateValue: (element, start, end, duration) => {
        let startTimestamp = null;
        const step = (timestamp) => {
            if (!startTimestamp) startTimestamp = timestamp;
            const progress = Math.min((timestamp - startTimestamp) / duration, 1);
            element.textContent = Math.floor(progress * (end - start) + start);
            if (progress < 1) {
                window.requestAnimationFrame(step);
            }
        };
        window.requestAnimationFrame(step);
    }
};

// Export utilities for use in components
window.utils = utils;