/**
 * 商家后台侧边栏通用脚本
 * 提供侧边栏的HTML结构和交互逻辑
 */

// 生成侧边栏HTML
function generateSidebarHTML(currentPage) {
    const menuItems = [
        { href: '/merchant/dashboard.html', icon: 'bi-speedometer2', text: '首页', page: 'dashboard' },
        { href: '/merchant/products.html', icon: 'bi-box-seam', text: '商品管理', page: 'products' },
        { href: '/merchant/orders.html', icon: 'bi-receipt-cutoff', text: '订单管理', page: 'orders' },
        { href: '/merchant/inventory.html', icon: 'bi-archive', text: '库存管理', page: 'inventory' },
        { href: '/merchant/statistics.html', icon: 'bi-bar-chart', text: '数据统计', page: 'statistics' },
        { href: '/merchant/announcements.html', icon: 'bi-megaphone', text: '公告管理', page: 'announcements' },
        { href: '/merchant/messages.html', icon: 'bi-chat-dots', text: '留言管理', page: 'messages' },
        { href: '/merchant/reviews.html', icon: 'bi-star', text: '评价管理', page: 'reviews' },
        { href: '/merchant/users.html', icon: 'bi-people', text: '用户管理', page: 'users' }
    ];
    
    const menuHTML = menuItems.map(item => {
        const activeClass = item.page === currentPage ? 'active' : '';
        return `
            <li class="nav-item">
                <a class="nav-link ${activeClass}" href="${item.href}" data-page="${item.page}">
                    <i class="bi ${item.icon}"></i>
                    <span class="nav-text">${item.text}</span>
                </a>
            </li>
        `;
    }).join('');
    
    return `
        <!-- 侧边栏导航 -->
        <div class="sidebar" id="sidebar">
            <div class="sidebar-header">
                <div class="d-flex align-items-center">
                    <i class="bi bi-shop fs-4 me-2"></i>
                    <span class="sidebar-brand">商家后台</span>
                </div>
                <button class="btn btn-link text-white p-0 d-md-none" id="sidebarCloseBtn">
                    <i class="bi bi-x-lg"></i>
                </button>
            </div>
            <nav class="sidebar-nav">
                <ul class="nav flex-column">
                    ${menuHTML}
                </ul>
            </nav>
            <div class="sidebar-footer">
                <a href="/merchant/logout" class="btn btn-outline-light w-100">
                    <i class="bi bi-box-arrow-right"></i>
                    <span class="ms-2">退出登录</span>
                </a>
            </div>
        </div>
        
        <!-- 侧边栏遮罩层（移动端） -->
        <div class="sidebar-overlay" id="sidebarOverlay"></div>
        
        <!-- 顶部导航栏（移动端） -->
        <nav class="top-navbar d-md-none">
            <div class="container-fluid d-flex align-items-center">
                <button class="btn btn-link text-white p-0" id="sidebarToggleBtn">
                    <i class="bi bi-list fs-4"></i>
                </button>
                <span class="ms-3 text-white fw-bold">商家后台</span>
            </div>
        </nav>
    `;
}

// 添加侧边栏CSS样式
function addSidebarStyles() {
    if (document.getElementById('sidebar-styles')) return;
    
    const style = document.createElement('style');
    style.id = 'sidebar-styles';
    style.textContent = `
        /* 侧边栏样式 */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: 260px;
            height: 100vh;
            background: linear-gradient(180deg, #2c3e50 0%, #34495e 100%);
            color: #fff;
            z-index: 1050;
            display: flex;
            flex-direction: column;
            transition: transform 0.3s ease;
            box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
        }
        
        .sidebar-header {
            padding: 1.5rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .sidebar-brand {
            font-size: 1.25rem;
            font-weight: 600;
        }
        
        .sidebar-nav {
            flex: 1;
            overflow-y: auto;
            padding: 1rem 0;
        }
        
        .sidebar-nav .nav-link {
            color: rgba(255, 255, 255, 0.8);
            padding: 0.75rem 1.5rem;
            transition: all 0.3s;
            border-left: 3px solid transparent;
            display: flex;
            align-items: center;
            text-decoration: none;
        }
        
        .sidebar-nav .nav-link:hover {
            background-color: rgba(255, 255, 255, 0.1);
            color: #fff;
            border-left-color: #0d6efd;
        }
        
        .sidebar-nav .nav-link.active {
            background-color: rgba(13, 110, 253, 0.2);
            color: #fff;
            border-left-color: #0d6efd;
            font-weight: 600;
        }
        
        .sidebar-nav .nav-link i {
            width: 24px;
            font-size: 1.1rem;
            margin-right: 0.75rem;
        }
        
        .sidebar-nav .nav-text {
            flex: 1;
        }
        
        .sidebar-footer {
            padding: 1rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }
        
        /* 移动端样式 */
        @media (max-width: 767.98px) {
            .sidebar {
                transform: translateX(-100%);
            }
            
            .sidebar.show {
                transform: translateX(0);
            }
            
            .sidebar-overlay {
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                bottom: 0;
                background-color: rgba(0, 0, 0, 0.5);
                z-index: 1049;
                display: none;
                transition: opacity 0.3s;
            }
            
            .sidebar-overlay.show {
                display: block;
            }
            
            .top-navbar {
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                height: 56px;
                background: linear-gradient(180deg, #2c3e50 0%, #34495e 100%);
                z-index: 1048;
                box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
            }
            
            body {
                padding-top: 56px;
            }
        }
        
        /* 桌面端主内容区域 */
        @media (min-width: 768px) {
            .main-content {
                margin-left: 260px;
                min-height: 100vh;
            }
        }
        
        /* 滚动条样式 */
        .sidebar-nav::-webkit-scrollbar {
            width: 6px;
        }
        
        .sidebar-nav::-webkit-scrollbar-track {
            background: rgba(255, 255, 255, 0.05);
        }
        
        .sidebar-nav::-webkit-scrollbar-thumb {
            background: rgba(255, 255, 255, 0.2);
            border-radius: 3px;
        }
        
        .sidebar-nav::-webkit-scrollbar-thumb:hover {
            background: rgba(255, 255, 255, 0.3);
        }
    `;
    document.head.appendChild(style);
}

// 初始化侧边栏交互
function initSidebar() {
    const sidebar = document.getElementById('sidebar');
    const sidebarOverlay = document.getElementById('sidebarOverlay');
    const sidebarToggleBtn = document.getElementById('sidebarToggleBtn');
    const sidebarCloseBtn = document.getElementById('sidebarCloseBtn');
    
    if (!sidebar) return;
    
    // 移动端切换侧边栏
    if (sidebarToggleBtn) {
        sidebarToggleBtn.addEventListener('click', function() {
            sidebar.classList.add('show');
            if (sidebarOverlay) sidebarOverlay.classList.add('show');
            document.body.style.overflow = 'hidden';
        });
    }
    
    // 关闭侧边栏
    function closeSidebar() {
        sidebar.classList.remove('show');
        if (sidebarOverlay) sidebarOverlay.classList.remove('show');
        document.body.style.overflow = '';
    }
    
    if (sidebarCloseBtn) {
        sidebarCloseBtn.addEventListener('click', closeSidebar);
    }
    
    if (sidebarOverlay) {
        sidebarOverlay.addEventListener('click', closeSidebar);
    }
    
    // 点击导航项时，移动端自动关闭侧边栏
    const navLinks = document.querySelectorAll('.sidebar-nav .nav-link');
    navLinks.forEach(link => {
        link.addEventListener('click', function() {
            if (window.innerWidth < 768) {
                closeSidebar();
            }
        });
    });
}

// 初始化侧边栏（自动检测当前页面）
function initMerchantSidebar() {
    addSidebarStyles();
    
    // 检测当前页面
    const path = window.location.pathname;
    let currentPage = 'dashboard';
    
    if (path.includes('products')) currentPage = 'products';
    else if (path.includes('orders')) currentPage = 'orders';
    else if (path.includes('inventory')) currentPage = 'inventory';
    else if (path.includes('statistics')) currentPage = 'statistics';
    else if (path.includes('announcements')) currentPage = 'announcements';
    else if (path.includes('messages')) currentPage = 'messages';
    else if (path.includes('reviews')) currentPage = 'reviews';
    else if (path.includes('users')) currentPage = 'users';
    
    // 查找并替换旧的导航栏
    const oldNav = document.querySelector('nav.navbar');
    if (oldNav) {
        oldNav.outerHTML = generateSidebarHTML(currentPage);
        initSidebar();
    }
}

// 页面加载完成后初始化
if (document.readyState === 'loading') {
    document.addEventListener('DOMContentLoaded', initMerchantSidebar);
} else {
    initMerchantSidebar();
}