// Main JavaScript functionality for Unity Fleet website

document.addEventListener('DOMContentLoaded', function() {
    // Initialize animations and interactions
    initScrollAnimations();
    initAccordion();
    initParallaxEffect();
    initHeroAnimation();
    
    // Mobile navigation toggle
    const navLinks = document.querySelector('.nav-links');
    const mobileNavToggle = document.createElement('div');
    mobileNavToggle.className = 'mobile-nav-toggle';
    mobileNavToggle.innerHTML = '<i class="fas fa-bars"></i>';
    document.querySelector('nav').appendChild(mobileNavToggle);
    
    mobileNavToggle.addEventListener('click', function() {
        navLinks.classList.toggle('active');
        this.innerHTML = navLinks.classList.contains('active') 
            ? '<i class="fas fa-times"></i>' 
            : '<i class="fas fa-bars"></i>';
    });
});

// Scroll animations for elements
function initScrollAnimations() {
    const animatedElements = document.querySelectorAll('.section-header, .feature-item, .subscription-card, .impact-metric, .token-diagram, .rural-content, .timeline-item');
    
    const observer = new IntersectionObserver((entries) => {
        entries.forEach(entry => {
            if (entry.isIntersecting) {
                entry.target.classList.add('animate');
                observer.unobserve(entry.target);
            }
        });
    }, {
        threshold: 0.1
    });
    
    animatedElements.forEach(element => {
        element.classList.add('pre-animation');
        observer.observe(element);
    });
    
    // Add CSS for animations
    const style = document.createElement('style');
    style.textContent = `
        .pre-animation {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        
        .animate {
            opacity: 1;
            transform: translateY(0);
        }
        
        .subscription-card.pre-animation {
            transform: translateY(50px);
            transition-delay: calc(var(--animation-order, 0) * 0.1s);
        }
        
        .feature-item.pre-animation {
            transform: translateX(-30px);
            transition-delay: calc(var(--animation-order, 0) * 0.1s);
        }
        
        .timeline-item.pre-animation {
            transform: translateX(-30px);
            transition-delay: calc(var(--animation-order, 0) * 0.15s);
        }
    `;
    document.head.appendChild(style);
    
    // Set animation order for staggered animations
    document.querySelectorAll('.subscription-card').forEach((card, index) => {
        card.style.setProperty('--animation-order', index);
    });
    
    document.querySelectorAll('.feature-item').forEach((item, index) => {
        item.style.setProperty('--animation-order', index);
    });
    
    document.querySelectorAll('.timeline-item').forEach((item, index) => {
        item.style.setProperty('--animation-order', index);
    });
}

// Accordion functionality for grant proposal section
function initAccordion() {
    const accordionItems = document.querySelectorAll('.accordion-item');
    
    accordionItems.forEach(item => {
        const header = item.querySelector('.accordion-header');
        const content = item.querySelector('.accordion-content');
        
        header.addEventListener('click', () => {
            // Close all other accordion items
            accordionItems.forEach(otherItem => {
                if (otherItem !== item && otherItem.classList.contains('active')) {
                    otherItem.classList.remove('active');
                    otherItem.querySelector('.accordion-content').style.maxHeight = '0px';
                }
            });
            
            // Toggle current item
            item.classList.toggle('active');
            
            if (item.classList.contains('active')) {
                content.style.display = 'block';
                content.style.maxHeight = content.scrollHeight + 'px';
            } else {
                content.style.maxHeight = '0px';
                setTimeout(() => {
                    content.style.display = 'none';
                }, 300);
            }
        });
    });
    
    // Open first accordion item by default
    if (accordionItems.length > 0) {
        accordionItems[0].classList.add('active');
        const firstContent = accordionItems[0].querySelector('.accordion-content');
        firstContent.style.display = 'block';
        firstContent.style.maxHeight = firstContent.scrollHeight + 'px';
    }
    
    // Add CSS for accordion animations
    const style = document.createElement('style');
    style.textContent = `
        .accordion-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
        }
    `;
    document.head.appendChild(style);
}

// Parallax effect for sections
function initParallaxEffect() {
    window.addEventListener('scroll', () => {
        const scrollPosition = window.pageYOffset;
        
        // Parallax for hero section
        const heroImage = document.querySelector('.hero-image');
        if (heroImage) {
            heroImage.style.transform = `translateY(${scrollPosition * 0.4}px)`;
        }
        
        // Subtle parallax for section backgrounds
        document.querySelectorAll('.section-gradient').forEach(section => {
            const sectionTop = section.offsetTop;
            const sectionHeight = section.offsetHeight;
            const sectionMiddle = sectionTop + sectionHeight / 2;
            const distanceFromMiddle = scrollPosition - sectionMiddle;
            const parallaxValue = distanceFromMiddle * 0.05;
            
            section.style.backgroundPosition = `center ${50 + parallaxValue}%`;
        });
    });
}

// Hero section animations
function initHeroAnimation() {
    const heroContent = document.querySelector('.hero-content');
    const heroElements = heroContent.querySelectorAll('h1, h2, p, .cta-buttons');
    
    // Add CSS for hero animations
    const style = document.createElement('style');
    style.textContent = `
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        .hero-animate {
            animation: fadeInUp 0.8s forwards;
            opacity: 0;
        }
    `;
    document.head.appendChild(style);
    
    // Apply staggered animations to hero elements
    heroElements.forEach((element, index) => {
        element.classList.add('hero-animate');
        element.style.animationDelay = `${0.3 + (index * 0.2)}s`;
    });
    
    // Add hover effect to CTA buttons
    document.querySelectorAll('.cta-buttons .btn').forEach(button => {
        button.addEventListener('mouseenter', function() {
            this.style.transform = 'translateY(-5px)';
            this.style.boxShadow = '0 15px 30px rgba(0, 224, 255, 0.3)';
        });
        
        button.addEventListener('mouseleave', function() {
            this.style.transform = '';
            this.style.boxShadow = '';
        });
    });
}

// Add smooth scrolling for navigation links
document.querySelectorAll('a[href^="#"]').forEach(anchor => {
    anchor.addEventListener('click', function(e) {
        e.preventDefault();
        
        const targetId = this.getAttribute('href');
        const targetElement = document.querySelector(targetId);
        
        if (targetElement) {
            // Close mobile navigation if open
            document.querySelector('.nav-links').classList.remove('active');
            document.querySelector('.mobile-nav-toggle').innerHTML = '<i class="fas fa-bars"></i>';
            
            // Scroll to target
            window.scrollTo({
                top: targetElement.offsetTop - 80, // Offset for fixed header
                behavior: 'smooth'
            });
        }
    });
});

// Add fixed navigation on scroll
window.addEventListener('scroll', function() {
    const nav = document.querySelector('nav');
    if (window.scrollY > 100) {
        nav.classList.add('nav-scrolled');
    } else {
        nav.classList.remove('nav-scrolled');
    }
});

// Add CSS for fixed navigation
const navStyle = document.createElement('style');
navStyle.textContent = `
    .nav-scrolled {
        position: fixed;
        background: rgba(11, 11, 15, 0.9);
        backdrop-filter: blur(10px);
        box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
        animation: slideDown 0.3s forwards;
    }
    
    @keyframes slideDown {
        from {
            transform: translateY(-100%);
        }
        to {
            transform: translateY(0);
        }
    }
    
    @media (max-width: 768px) {
        .mobile-nav-toggle {
            display: block;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--accent-color-1);
        }
        
        .nav-links {
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            background: rgba(11, 11, 15, 0.95);
            flex-direction: column;
            padding: 1rem 0;
            clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
            transition: clip-path 0.4s ease;
        }
        
        .nav-links.active {
            clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
        }
        
        .nav-links a {
            padding: 1rem 2rem;
        }
    }
`;
document.head.appendChild(navStyle);

// Add token orbit animation
const orbitStyle = document.createElement('style');
orbitStyle.textContent = `
    .orbit-item {
        transition: transform 0.3s ease, background 0.3s ease;
    }
    
    .orbit-item:hover {
        transform: scale(1.2) !important;
        background: var(--accent-color-1);
        color: var(--bg-color);
    }
`;
document.head.appendChild(orbitStyle);

// Add hover effects to image cards
document.querySelectorAll('.image-card').forEach(card => {
    card.addEventListener('mouseenter', function() {
        this.querySelector('img').style.transform = 'scale(1.05)';
        this.querySelector('.image-overlay').style.opacity = '1';
    });
    
    card.addEventListener('mouseleave', function() {
        this.querySelector('img').style.transform = 'scale(1)';
        this.querySelector('.image-overlay').style.opacity = '0.8';
    });
});

// Add CSS for image card hover effects
const imageCardStyle = document.createElement('style');
imageCardStyle.textContent = `
    .image-card img {
        transition: transform 0.5s ease;
    }
    
    .image-overlay {
        opacity: 0.8;
        transition: opacity 0.3s ease;
    }
`;
document.head.appendChild(imageCardStyle);