// 导航组件 - 统一管理所有页面的导航栏
(function() {
    // 检测当前页面路径，自动调整链接
    const currentPath = window.location.pathname;
    const isInPagesFolder = currentPath.includes('/pages/');
    const currentPage = currentPath.split('/').pop() || 'index.html';
    
    // 导航项配置
    const navItems = [
        { href: 'index.html', icon: 'fa-home', text: '首页', id: 'index' },
        { href: 'overview.html', icon: 'fa-info-circle', text: '展会概览', id: 'overview' },
        { href: 'exhibition.html', icon: 'fa-th-large', text: '展览内容', id: 'exhibition' },
        { href: 'operation.html', icon: 'fa-drafting-compass', text: '布局设计', id: 'operation' },
        { href: 'marketing.html', icon: 'fa-bullhorn', text: '营销推广', id: 'marketing' },
        { href: 'budget.html', icon: 'fa-chart-pie', text: '预算分析', id: 'budget' },
        { href: 'risk.html', icon: 'fa-shield-alt', text: '风险评估', id: 'risk' }
    ];
    
    // 根据当前页面位置调整路径
    function getCorrectPath(href) {
        // 移除可能存在的 pages/ 前缀
        if (href.startsWith('pages/')) {
            return href.substring(6); // 移除 'pages/' 前缀
        }
        return href;
    }
    
    // 判断是否为当前激活页面
    function isActive(href) {
        return currentPage === href || 
               (currentPage === '' && href === 'index.html');
    }
    
    // 生成导航HTML
    function generateNavHTML() {
        return `
        <div class="nav-container container mx-auto px-6 py-4">
            <div class="flex items-center justify-between">
                <div class="flex items-center nav-logo">
                    <div class="logo-icon w-10 h-10 bg-gradient-to-br from-emerald-400 to-blue-500 rounded-lg flex items-center justify-center mr-3 transition-transform hover:scale-110">
                        <i class="fas fa-charging-station text-white"></i>
                    </div>
                    <div>
                        <h1 class="text-lg font-bold text-gray-800">NEVIT 2024</h1>
                        <p class="text-xs text-gray-500">新能源汽车产业博览会</p>
                    </div>
                </div>
                <div class="hidden md:flex space-x-6 lg:space-x-8">
                    ${navItems.map(item => `
                        <a href="${getCorrectPath(item.href)}" 
                           class="nav-link ${isActive(item.href) ? 'active text-emerald-500' : 'text-gray-700'} hover:text-emerald-500 transition-all duration-300 relative group"
                           data-nav="${item.id}">
                            <i class="fas ${item.icon} mr-2"></i>${item.text}
                            ${isActive(item.href) ? '<span class="absolute bottom-0 left-0 w-full h-0.5 bg-emerald-500"></span>' : '<span class="absolute bottom-0 left-0 w-0 h-0.5 bg-emerald-500 transition-all duration-300 group-hover:w-full"></span>'}
                        </a>
                    `).join('')}
                </div>
                <button class="md:hidden menu-toggle" id="mobile-menu-button">
                    <span class="menu-icon">
                        <span></span>
                        <span></span>
                        <span></span>
                    </span>
                </button>
            </div>
        </div>
        
        <!-- Mobile Menu -->
        <div class="mobile-menu-overlay hidden" id="mobile-menu-overlay"></div>
        <div class="mobile-menu transform translate-x-full transition-transform duration-300 fixed top-0 right-0 h-full w-80 bg-white shadow-2xl z-50" id="mobile-menu">
            <div class="p-6">
                <button class="absolute top-6 right-6 text-gray-500 hover:text-gray-700" id="close-menu">
                    <i class="fas fa-times text-2xl"></i>
                </button>
                <div class="mb-8">
                    <h2 class="text-2xl font-bold text-gray-800">NEVIT 2024</h2>
                    <p class="text-sm text-gray-500">新能源汽车产业博览会</p>
                </div>
                <div class="space-y-4">
                    ${navItems.map(item => `
                        <a href="${getCorrectPath(item.href)}" 
                           class="block py-3 px-4 rounded-lg ${isActive(item.href) ? 'bg-emerald-50 text-emerald-500' : 'text-gray-700 hover:bg-gray-50'} transition-all duration-300"
                           data-nav="${item.id}">
                            <i class="fas ${item.icon} mr-3 w-5"></i>${item.text}
                        </a>
                    `).join('')}
                </div>
                <div class="mt-8 pt-8 border-t border-gray-200">
                    <p class="text-sm text-gray-500">2024年9月12-15日</p>
                    <p class="text-sm text-gray-500">国家会展中心（上海）</p>
                </div>
            </div>
        </div>`;
    }
    
    // 添加样式
    function addStyles() {
        const style = document.createElement('style');
        style.textContent = `
            .nav-container {
                transition: all 0.3s ease;
            }
            .navbar-scrolled {
                box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            }
            .navbar-scrolled .nav-container {
                padding-top: 0.75rem;
                padding-bottom: 0.75rem;
            }
            .nav-logo {
                animation: fadeInLeft 0.6s ease-out;
            }
            .nav-link {
                position: relative;
                padding: 0.5rem 0;
                font-weight: 500;
            }
            .menu-icon {
                width: 24px;
                height: 20px;
                position: relative;
                display: block;
                cursor: pointer;
            }
            .menu-icon span {
                display: block;
                position: absolute;
                width: 100%;
                height: 2px;
                background-color: #374151;
                transition: all 0.3s ease;
            }
            .menu-icon span:nth-child(1) {
                top: 0;
            }
            .menu-icon span:nth-child(2) {
                top: 50%;
                transform: translateY(-50%);
            }
            .menu-icon span:nth-child(3) {
                bottom: 0;
            }
            .menu-open .menu-icon span:nth-child(1) {
                transform: rotate(45deg) translate(6px, 6px);
            }
            .menu-open .menu-icon span:nth-child(2) {
                opacity: 0;
            }
            .menu-open .menu-icon span:nth-child(3) {
                transform: rotate(-45deg) translate(6px, -6px);
            }
            .mobile-menu-overlay {
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                bottom: 0;
                background-color: rgba(0, 0, 0, 0.5);
                z-index: 40;
                opacity: 0;
                transition: opacity 0.3s ease;
            }
            .mobile-menu-overlay.show {
                opacity: 1;
            }
            .mobile-menu.show {
                transform: translateX(0);
            }
            @keyframes fadeInLeft {
                from {
                    opacity: 0;
                    transform: translateX(-20px);
                }
                to {
                    opacity: 1;
                    transform: translateX(0);
                }
            }
            @media (max-width: 768px) {
                .nav-container {
                    padding: 1rem 1.5rem;
                }
            }
        `;
        document.head.appendChild(style);
    }
    
    // 初始化导航
    function initNav() {
        const navElement = document.querySelector('nav') || document.getElementById('navbar');
        if (navElement) {
            // 统一设置导航栏样式
            navElement.className = 'fixed top-0 w-full bg-white z-50 transition-all duration-300';
            navElement.id = 'navbar';
            
            // 添加样式
            addStyles();
            
            // 更新导航内容
            navElement.innerHTML = generateNavHTML();
            
            // 添加滚动效果
            let lastScrollTop = 0;
            window.addEventListener('scroll', function() {
                const scrollTop = window.pageYOffset || document.documentElement.scrollTop;
                
                // 添加滚动阴影
                if (scrollTop > 50) {
                    navElement.classList.add('navbar-scrolled');
                } else {
                    navElement.classList.remove('navbar-scrolled');
                }
                
                lastScrollTop = scrollTop;
            });
            
            // 移动端菜单交互
            const mobileMenuButton = document.getElementById('mobile-menu-button');
            const mobileMenu = document.getElementById('mobile-menu');
            const mobileMenuOverlay = document.getElementById('mobile-menu-overlay');
            const closeMenuButton = document.getElementById('close-menu');
            
            if (mobileMenuButton && mobileMenu) {
                // 打开菜单
                mobileMenuButton.addEventListener('click', function() {
                    mobileMenu.classList.add('show');
                    if (mobileMenuOverlay) {
                        mobileMenuOverlay.classList.remove('hidden');
                        setTimeout(function() {
                            mobileMenuOverlay.classList.add('show');
                        }, 10);
                    }
                    mobileMenuButton.classList.add('menu-open');
                    document.body.style.overflow = 'hidden';
                });
                
                // 关闭菜单功能
                const closeMenu = function() {
                    mobileMenu.classList.remove('show');
                    if (mobileMenuOverlay) {
                        mobileMenuOverlay.classList.remove('show');
                        setTimeout(function() {
                            mobileMenuOverlay.classList.add('hidden');
                        }, 300);
                    }
                    mobileMenuButton.classList.remove('menu-open');
                    document.body.style.overflow = '';
                };
                
                // 点击关闭按钮
                closeMenuButton.addEventListener('click', closeMenu);
                
                // 点击遮罩关闭
                mobileMenuOverlay.addEventListener('click', closeMenu);
                
                // 点击菜单项后关闭
                mobileMenu.querySelectorAll('a').forEach(function(link) {
                    link.addEventListener('click', closeMenu);
                });
            }
        }
    }
    
    // DOM加载完成后初始化
    if (document.readyState === 'loading') {
        document.addEventListener('DOMContentLoaded', initNav);
    } else {
        initNav();
    }
})();