// 页面加载完成后执行
document.addEventListener('DOMContentLoaded', function() {
    // 设置当前年份
    const yearElement = document.querySelector('.footer-bottom p');
    if (yearElement) {
        yearElement.innerHTML = yearElement.innerHTML.replace('{{ current_year }}', new Date().getFullYear());
    }

    // 初始化SHA-256容器，默认隐藏
    const sha256Containers = document.querySelectorAll('.sha256-container');
    sha256Containers.forEach(container => {
        container.style.display = 'none';
    });

    // 绑定SHA-256按钮事件
    const sha256Buttons = document.querySelectorAll('.sha256-btn');
    sha256Buttons.forEach(button => {
        button.addEventListener('click', function() {
            const category = this.getAttribute('data-category');
            const filename = this.getAttribute('data-filename');
            const containerId = `sha256-${category}-${filename}`;
            const container = document.getElementById(containerId);

            // 切换显示/隐藏状态
            if (container.style.display === 'none' || container.style.display === '') {
                container.style.display = 'flex';
                this.innerHTML = '<i class="fas fa-times"></i> 隐藏';
                this.classList.add('active');
            } else {
                container.style.display = 'none';
                this.innerHTML = '<i class="fas fa-hashtag"></i> SHA-256';
                this.classList.remove('active');
            }
        });
    });

    // 平滑滚动
    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) {
                window.scrollTo({
                    top: targetElement.offsetTop - 80, // 减去导航栏高度
                    behavior: 'smooth'
                });
            }
        });
    });

    // 为文件卡片添加hover效果
    const fileCards = document.querySelectorAll('.file-card');
    fileCards.forEach(card => {
        card.addEventListener('mouseenter', function() {
            this.style.transform = 'translateY(-5px)';
            this.style.boxShadow = '0 10px 20px rgba(0,0,0,0.1)';
        });
        
        card.addEventListener('mouseleave', function() {
            this.style.transform = 'translateY(0)';
            this.style.boxShadow = '';
        });
    });

    // 为下载按钮添加点击效果
    const downloadButtons = document.querySelectorAll('.download-btn');
    downloadButtons.forEach(button => {
        button.addEventListener('mousedown', function() {
            this.style.transform = 'scale(0.95)';
        });
        
        button.addEventListener('mouseup', function() {
            this.style.transform = 'scale(1)';
        });
        
        button.addEventListener('click', function() {
            showNotification('开始下载文件...');
        });
    });
});

// 复制SHA-256到剪贴板
function copyToClipboard(id) {
    const containerId = `sha256-${id}`;
    const container = document.getElementById(containerId);
    const codeElement = container.querySelector('code');
    const textToCopy = codeElement.textContent;
    
    navigator.clipboard.writeText(textToCopy).then(function() {
        showNotification('SHA-256校验和已复制到剪贴板');
    }).catch(function(err) {
        console.error('复制失败:', err);
        showNotification('复制失败，请手动复制', 'error');
    });
}

// 显示通知
function showNotification(message, type = 'success') {
    const notification = document.getElementById('notification');
    const notificationMessage = document.getElementById('notification-message');
    
    notificationMessage.textContent = message;
    
    // 设置不同类型的样式
    if (type === 'error') {
        notification.style.backgroundColor = '#d73a49';
    } else {
        notification.style.backgroundColor = '#2ea44f';
    }
    
    // 显示通知
    notification.classList.add('show');
    
    // 3秒后隐藏通知
    setTimeout(function() {
        notification.classList.remove('show');
    }, 3000);
}

// 监听滚动事件，动态调整导航栏样式
window.addEventListener('scroll', function() {
    const navbar = document.querySelector('.navbar');
    if (window.scrollY > 50) {
        navbar.style.boxShadow = '0 4px 6px rgba(0,0,0,0.1)';
        navbar.style.padding = '12px 0';
    } else {
        navbar.style.boxShadow = '';
        navbar.style.padding = '16px 0';
    }
});

// 图片懒加载效果
function lazyLoadImages() {
    const images = document.querySelectorAll('img[data-src]');
    
    const imgObserver = new IntersectionObserver((entries, observer) => {
        entries.forEach(entry => {
            if (entry.isIntersecting) {
                const img = entry.target;
                img.src = img.dataset.src;
                img.removeAttribute('data-src');
                observer.unobserve(img);
            }
        });
    });
    
    images.forEach(img => imgObserver.observe(img));
}

// 加载更多文件时的平滑动画
function animateFileIn(fileElement) {
    fileElement.style.opacity = '0';
    fileElement.style.transform = 'translateY(20px)';
    
    setTimeout(() => {
        fileElement.style.transition = 'opacity 0.5s ease, transform 0.5s ease';
        fileElement.style.opacity = '1';
        fileElement.style.transform = 'translateY(0)';
    }, 10);
}