// Modern Project Detail Page Enhancements
document.addEventListener('DOMContentLoaded', function() {
    
    // Animate counter numbers
    function animateCounters() {
        const counters = document.querySelectorAll('.stat-number[data-target]');
        
        const observer = new IntersectionObserver((entries) => {
            entries.forEach(entry => {
                if (entry.isIntersecting) {
                    const counter = entry.target;
                    const target = parseInt(counter.dataset.target);
                    const duration = 2000; // 2 seconds
                    const step = target / (duration / 16); // 60fps
                    let current = 0;
                    
                    const timer = setInterval(() => {
                        current += step;
                        counter.textContent = Math.floor(current);
                        
                        if (current >= target) {
                            counter.textContent = target;
                            clearInterval(timer);
                        }
                    }, 16);
                    
                    observer.unobserve(counter);
                }
            });
        }, {
            threshold: 0.5
        });
        
        counters.forEach(counter => observer.observe(counter));
    }
    
    // Scroll-triggered animations
    function initScrollAnimations() {
        const animatedElements = document.querySelectorAll('.content-section, .tech-item, .info-item');
        
        const observer = new IntersectionObserver((entries) => {
            entries.forEach((entry, index) => {
                if (entry.isIntersecting) {
                    setTimeout(() => {
                        entry.target.style.opacity = '1';
                        entry.target.style.transform = 'translateY(0)';
                    }, index * 100);
                }
            });
        }, {
            threshold: 0.1,
            rootMargin: '0px 0px -50px 0px'
        });
        
        animatedElements.forEach(el => {
            el.style.opacity = '0';
            el.style.transform = 'translateY(30px)';
            el.style.transition = 'opacity 0.6s ease, transform 0.6s ease';
            observer.observe(el);
        });
    }
    
    // Share functionality
    function initShareButton() {
        const shareBtn = document.querySelector('.share-btn');
        if (shareBtn) {
            shareBtn.addEventListener('click', async function() {
                const projectTitle = document.querySelector('.hero-title').textContent;
                const url = window.location.href;
                
                if (navigator.share) {
                    try {
                        await navigator.share({
                            title: projectTitle,
                            text: `Посмотрите на этот проект: ${projectTitle}`,
                            url: url
                        });
                    } catch (err) {
                        console.log('Sharing failed:', err);
                        fallbackShare(url);
                    }
                } else {
                    fallbackShare(url);
                }
            });
        }
    }
    
    function fallbackShare(url) {
        // Copy to clipboard as fallback
        if (navigator.clipboard) {
            navigator.clipboard.writeText(url).then(() => {
                showToast('Ссылка скопирована в буфер обмена!');
            });
        }
    }
    
    function showToast(message) {
        // Create toast notification
        const toast = document.createElement('div');
        toast.className = 'toast-notification';
        toast.textContent = message;
        toast.style.cssText = `
            position: fixed;
            top: 20px;
            right: 20px;
            background: linear-gradient(135deg, #48bb78, #38a169);
            color: white;
            padding: 1rem 1.5rem;
            border-radius: 10px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.2);
            z-index: 10000;
            transform: translateX(400px);
            transition: transform 0.3s ease;
        `;
        
        document.body.appendChild(toast);
        
        setTimeout(() => {
            toast.style.transform = 'translateX(0)';
        }, 100);
        
        setTimeout(() => {
            toast.style.transform = 'translateX(400px)';
            setTimeout(() => document.body.removeChild(toast), 300);
        }, 3000);
    }
    
    // Tech item hover effects
    function initTechInteractions() {
        const techItems = document.querySelectorAll('.tech-item');
        
        techItems.forEach(item => {
            item.addEventListener('mouseenter', function() {
                this.style.transform = 'translateY(-8px) scale(1.02)';
            });
            
            item.addEventListener('mouseleave', function() {
                this.style.transform = 'translateY(-5px) scale(1)';
            });
        });
    }
    
    // Parallax effect for hero background
    function initParallaxEffect() {
        const heroBackground = document.querySelector('.hero-pattern');
        if (!heroBackground) return;
        
        let ticking = false;
        
        function updateParallax() {
            const scrolled = window.pageYOffset;
            const rate = scrolled * -0.3;
            
            heroBackground.style.transform = `translateY(${rate}px)`;
            ticking = false;
        }
        
        function requestTick() {
            if (!ticking) {
                requestAnimationFrame(updateParallax);
                ticking = true;
            }
        }
        
        window.addEventListener('scroll', requestTick);
    }
    
    // Smooth scroll for internal links
    function initSmoothScroll() {
        const links = document.querySelectorAll('a[href^="#"]');
        
        links.forEach(link => {
            link.addEventListener('click', function(e) {
                e.preventDefault();
                
                const targetId = this.getAttribute('href');
                const targetSection = document.querySelector(targetId);
                
                if (targetSection) {
                    targetSection.scrollIntoView({
                        behavior: 'smooth',
                        block: 'start'
                    });
                }
            });
        });
    }
    
    // Initialize all enhancements
    animateCounters();
    initScrollAnimations();
    initShareButton();
    initTechInteractions();
    initParallaxEffect();
    initSmoothScroll();
    
    // Add loading class removal after page load
    window.addEventListener('load', function() {
        document.body.classList.add('page-loaded');
    });
});

// CSS for page loading animation
const loadingStyles = `
    body:not(.page-loaded) .project-hero {
        opacity: 0;
        transform: translateY(50px);
        transition: opacity 0.8s ease, transform 0.8s ease;
    }
    
    body.page-loaded .project-hero {
        opacity: 1;
        transform: translateY(0);
    }
    
    .toast-notification {
        font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        font-size: 0.9rem;
        font-weight: 500;
    }
`;

// Inject loading styles
const styleSheet = document.createElement('style');
styleSheet.textContent = loadingStyles;
document.head.appendChild(styleSheet);