// 主要JavaScript功能文件

// DOM加载完成后执行
document.addEventListener('DOMContentLoaded', function() {
    // 初始化所有功能
    initNavbar();
    initScrollAnimations();
    initFloatingCards();
    initSmoothScroll();
});

// 导航栏功能
function initNavbar() {
    const navbar = document.querySelector('.navbar');
    const navLinks = document.querySelectorAll('.nav-link');
    
    // 滚动时改变导航栏样式
    window.addEventListener('scroll', function() {
        if (window.scrollY > 50) {
            navbar.style.background = 'rgba(255, 255, 255, 0.98)';
            navbar.style.boxShadow = '0 4px 6px -1px rgb(0 0 0 / 0.1)';
        } else {
            navbar.style.background = 'rgba(255, 255, 255, 0.95)';
            navbar.style.boxShadow = 'none';
        }
    });
    
    // 导航链接点击效果
    navLinks.forEach(link => {
        link.addEventListener('click', function(e) {
            // 移除所有活动状态
            navLinks.forEach(l => l.classList.remove('active'));
            // 添加当前活动状态
            this.classList.add('active');
        });
    });
}

// 滚动动画
function initScrollAnimations() {
    // 创建Intersection Observer
    const observer = new IntersectionObserver((entries) => {
        entries.forEach(entry => {
            if (entry.isIntersecting) {
                entry.target.style.opacity = '1';
                entry.target.style.transform = 'translateY(0)';
            }
        });
    }, {
        threshold: 0.1,
        rootMargin: '0px 0px -50px 0px'
    });
    
    // 观察需要动画的元素
    const animatedElements = document.querySelectorAll(
        '.solution-card, .comparison-side, .flow-item, .concept-content'
    );
    
    animatedElements.forEach(el => {
        // 设置初始状态
        el.style.opacity = '0';
        el.style.transform = 'translateY(30px)';
        el.style.transition = 'opacity 0.6s ease, transform 0.6s ease';
        
        // 开始观察
        observer.observe(el);
    });
}

// 浮动卡片动画增强
function initFloatingCards() {
    const cards = document.querySelectorAll('.floating-card');
    
    cards.forEach((card, index) => {
        // 鼠标悬停效果
        card.addEventListener('mouseenter', function() {
            this.style.transform = 'translateY(-10px) scale(1.05)';
            this.style.boxShadow = '0 20px 25px -5px rgb(0 0 0 / 0.2)';
        });
        
        card.addEventListener('mouseleave', function() {
            this.style.transform = 'translateY(0) scale(1)';
            this.style.boxShadow = '0 20px 25px -5px rgb(0 0 0 / 0.1)';
        });
        
        // 随机浮动动画
        setInterval(() => {
            const randomY = Math.random() * 20 - 10;
            const randomX = Math.random() * 10 - 5;
            card.style.transform += ` translate(${randomX}px, ${randomY}px)`;
            
            setTimeout(() => {
                card.style.transform = card.style.transform.replace(
                    /translate\([^)]*\)/g, ''
                );
            }, 2000);
        }, 3000 + index * 1000);
    });
}

// 平滑滚动
function initSmoothScroll() {
    // 为所有内部链接添加平滑滚动
    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'
                });
            }
        });
    });
}

// 按钮点击效果
document.addEventListener('click', function(e) {
    if (e.target.classList.contains('btn')) {
        // 创建波纹效果
        const ripple = document.createElement('span');
        const rect = e.target.getBoundingClientRect();
        const size = Math.max(rect.width, rect.height);
        const x = e.clientX - rect.left - size / 2;
        const y = e.clientY - rect.top - size / 2;
        
        ripple.style.cssText = `
            position: absolute;
            width: ${size}px;
            height: ${size}px;
            left: ${x}px;
            top: ${y}px;
            background: rgba(255, 255, 255, 0.3);
            border-radius: 50%;
            transform: scale(0);
            animation: ripple 0.6s linear;
            pointer-events: none;
        `;
        
        e.target.style.position = 'relative';
        e.target.style.overflow = 'hidden';
        e.target.appendChild(ripple);
        
        setTimeout(() => {
            ripple.remove();
        }, 600);
    }
});

// 添加CSS动画关键帧
const style = document.createElement('style');
style.textContent = `
    @keyframes ripple {
        to {
            transform: scale(4);
            opacity: 0;
        }
    }
    
    @keyframes fadeInUp {
        from {
            opacity: 0;
            transform: translateY(30px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
    
    .animate-fade-in-up {
        animation: fadeInUp 0.6s ease forwards;
    }
`;
document.head.appendChild(style);

// 性能优化：节流函数
function throttle(func, limit) {
    let inThrottle;
    return function() {
        const args = arguments;
        const context = this;
        if (!inThrottle) {
            func.apply(context, args);
            inThrottle = true;
            setTimeout(() => inThrottle = false, limit);
        }
    };
}

// 优化滚动事件
window.addEventListener('scroll', throttle(function() {
    // 滚动到顶部按钮显示/隐藏
    const scrollTop = window.pageYOffset || document.documentElement.scrollTop;
    
    // 可以在这里添加更多滚动相关的功能
}, 100));

// 响应式菜单（移动端）
function initMobileMenu() {
    const navMenu = document.querySelector('.nav-menu');
    const mobileMenuBtn = document.createElement('button');
    
    mobileMenuBtn.innerHTML = '☰';
    mobileMenuBtn.className = 'mobile-menu-btn';
    mobileMenuBtn.style.cssText = `
        display: none;
        background: none;
        border: none;
        font-size: 1.5rem;
        color: var(--text-primary);
        cursor: pointer;
    `;
    
    // 在移动端显示菜单按钮
    const mediaQuery = window.matchMedia('(max-width: 768px)');
    function handleMediaQuery(e) {
        if (e.matches) {
            mobileMenuBtn.style.display = 'block';
            document.querySelector('.nav-container').appendChild(mobileMenuBtn);
        } else {
            mobileMenuBtn.style.display = 'none';
        }
    }
    
    mediaQuery.addListener(handleMediaQuery);
    handleMediaQuery(mediaQuery);
    
    // 菜单切换功能
    mobileMenuBtn.addEventListener('click', function() {
        navMenu.style.display = navMenu.style.display === 'flex' ? 'none' : 'flex';
    });
}

// 初始化移动端菜单
initMobileMenu();

// 错误处理
window.addEventListener('error', function(e) {
    console.error('JavaScript错误:', e.error);
});

// 页面加载完成提示
console.log('码上有酒 - 新零售系统已加载完成');