/**
 * 共享侧边栏加载器
 * 动态加载侧边栏组件，支持高亮当前页面
 */

(function() {
    'use strict';

    // 侧边栏容器占位样式（防止加载时闪烁）
    const containerStyles = `
        #sidebar-container {
            width: 16rem;
            min-width: 16rem;
            height: 100vh;
            background-color: #001529;
            flex-shrink: 0;
        }
        @media (max-width: 768px) {
            #sidebar-container {
                display: none;
            }
        }
    `;

    // 侧边栏样式
    const sidebarStyles = `
        .sidebar-section-title {
            padding: 0.5rem 1rem;
            font-size: 0.75rem;
            color: rgba(191, 203, 217, 0.7);
            font-weight: 500;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }
        .nav-link:hover {
            background-color: rgba(0, 21, 41, 0.2);
        }
        .sidebar-item-active {
            background-color: rgba(24, 144, 255, 0.1) !important;
            color: #1890ff !important;
            border-left: 4px solid #1890ff;
        }
        .sidebar-slider {
            position: absolute;
            left: 0;
            width: 4px;
            height: 0;
            background-color: #1890ff;
            border-radius: 0 2px 2px 0;
            transition: top 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                        height 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                        opacity 0.3s ease;
            pointer-events: none;
            z-index: 10;
            opacity: 0;
        }
        .nav-item-wrapper {
            position: relative;
        }
        .nav-link {
            position: relative;
            z-index: 1;
        }
    `;

    // 立即注入容器样式（防止闪烁）
    (function injectContainerStyles() {
        const styleEl = document.createElement('style');
        styleEl.id = 'sidebar-container-styles';
        styleEl.textContent = containerStyles;
        document.head.appendChild(styleEl);
    })();

    // 根据当前页面路径确定活动页面
    function getCurrentPage() {
        const path = window.location.pathname;
        const search = window.location.search;
        const fileName = path.split('/').pop().replace('.html', '');

        // 检查 URL 参数
        const urlParams = new URLSearchParams(search);
        const pageParam = urlParams.get('page');
        if (pageParam) {
            return pageParam;
        }

        // 根据文件名映射
        const pageMap = {
            'main': 'fine-tune',
            'hardware': 'hardware',
            'logs': 'logs',
            'tools': 'tools',
            'fine-tune-create': 'fine-tune',
            'training-log': 'fine-tune',
            'dataset-create': 'dataset-manage',
            'dataset-preview': 'dataset-manage',
            'model-manage': 'model-manage',
            'model-manage-create': 'model-manage',
            'model-eval': 'model-eval',
            'model-eval-create': 'model-eval',
            'model-compare-create': 'model-compare',
            'model-compare-chat': 'model-compare',
            'model-compare-result': 'model-compare',
            'model-dimension-create': 'model-eval',
            'model-inference': 'model-manage',
            'custom-tool-create': 'tools'
        };

        return pageMap[fileName] || 'fine-tune';
    }

    // 加载侧边栏
    async function loadSidebar() {
        const container = document.getElementById('sidebar-container');
        if (!container) {
            console.warn('未找到 sidebar-container 元素');
            return;
        }

        try {
            // 计算组件路径
            const currentPath = window.location.pathname;
            let basePath = '';
            if (currentPath.includes('/pages/')) {
                basePath = 'components/';
            } else {
                basePath = 'pages/components/';
            }

            const response = await fetch(basePath + 'sidebar.html');
            if (!response.ok) {
                throw new Error('加载侧边栏失败: ' + response.status);
            }

            const html = await response.text();
            container.innerHTML = html;

            // 注入样式
            if (!document.getElementById('sidebar-styles')) {
                const styleEl = document.createElement('style');
                styleEl.id = 'sidebar-styles';
                styleEl.textContent = sidebarStyles;
                document.head.appendChild(styleEl);
            }

            // 修正 logo 路径
            const logo = container.querySelector('#sidebar-logo');
            if (logo) {
                const depth = currentPath.split('/pages/').length > 1 ? '../' : '';
                logo.src = depth + 'assets/logo/logo.png';
            }

            // 高亮当前页面
            const currentPage = window.sidebarCurrentPage || getCurrentPage();
            highlightCurrentPage(currentPage);

            // 初始化滑块
            initSlider();

        } catch (error) {
            console.error('加载侧边栏出错:', error);
        }
    }

    // 高亮当前页面
    function highlightCurrentPage(currentPage) {
        document.querySelectorAll('.nav-link').forEach(link => {
            const page = link.dataset.page;
            if (page === currentPage) {
                link.classList.add('sidebar-item-active');
                link.classList.remove('hover:bg-[#001529]/20', 'transition-colors');
            } else {
                link.classList.remove('sidebar-item-active');
                link.classList.add('hover:bg-[#001529]/20', 'transition-colors');
            }
        });
    }

    // 初始化滑块
    function initSlider() {
        const slider = document.getElementById('sidebar-slider');
        if (!slider) return;

        // 找到当前活动项
        const activeLink = document.querySelector('.nav-link.sidebar-item-active');
        if (activeLink) {
            const wrapper = activeLink.closest('.nav-item-wrapper');
            if (wrapper) {
                updateSliderPosition(wrapper);
            }
        }

        // 绑定导航点击事件
        document.querySelectorAll('.nav-link').forEach(link => {
            link.addEventListener('click', function(e) {
                const wrapper = this.closest('.nav-item-wrapper');
                if (wrapper) {
                    updateSliderPosition(wrapper);
                }
            });
        });
    }

    // 更新滑块位置
    function updateSliderPosition(targetWrapper) {
        const slider = document.getElementById('sidebar-slider');
        if (!slider || !targetWrapper) return;

        const nav = document.querySelector('nav');
        if (!nav) return;

        const navRect = nav.getBoundingClientRect();
        const wrapperRect = targetWrapper.getBoundingClientRect();

        const top = wrapperRect.top - navRect.top + nav.scrollTop;
        const height = wrapperRect.height;

        slider.style.top = top + 'px';
        slider.style.height = height + 'px';
        slider.style.opacity = '1';
    }

    // 导出到全局
    window.SidebarLoader = {
        load: loadSidebar,
        highlight: highlightCurrentPage,
        getCurrentPage: getCurrentPage
    };

    // DOM 加载完成后自动加载侧边栏
    if (document.readyState === 'loading') {
        document.addEventListener('DOMContentLoaded', loadSidebar);
    } else {
        loadSidebar();
    }
})();