// 最简导航组件 - 原生DOM操作（无h函数）
(function() {
  console.log('[Nav] 脚本加载');

  function injectStyles() {
    if (document.getElementById('navigation-styles')) return;
    const styles = `
      .navigation-wrapper { position: relative; }
      .navigation-wrapper .sidebar {
        position: fixed; top: 60px; left: 0; bottom: 0; width: 180px;
        background: #ffffff; padding: 12px; box-shadow: 2px 0 8px rgba(0,0,0,0.1);
        overflow-y: auto; z-index: 99999; border-right: 1px solid #ebeef5;
      }
      .navigation-wrapper .sidebar-header { padding: 12px 8px 16px; border-bottom: 1px solid #ebeef5; margin-bottom: 12px; }
      .navigation-wrapper .sidebar-header h3 { margin: 0; font-size: 16px; font-weight: 600; color: #303133; }
      .navigation-wrapper .sidebar-btn {
        width: 100%; text-align: left; padding: 10px 12px; border: none; background: transparent; border-radius: 8px;
        margin-bottom: 6px; cursor: pointer; transition: all 0.3s; color: #606266; font-size: 14px; display: flex; align-items: center; gap: 6px;
      }
      .navigation-wrapper .sidebar-btn:hover { background: #f5f7fa; color: #409eff; }
      .navigation-wrapper .sidebar-btn.active { background: #ecf5ff; color: #409eff; font-weight: 600 !important; }
      .navigation-wrapper .mobile-nav {
        display: none; position: fixed; bottom: 0; left: 0; right: 0; background: #1890ff;
        box-shadow: 0 -2px 8px rgba(0,0,0,0.2); padding: 8px 0; z-index: 99999; justify-content: space-around;
      }
      .navigation-wrapper .mobile-nav-btn {
        flex: 1; border: none; background: transparent; padding: 10px 4px; text-align: center;
        font-size: 12px; color: white !important; cursor: pointer; display: flex; flex-direction: column; align-items: center; gap: 2px;
        transition: background 0.2s;
      }
      .navigation-wrapper .mobile-nav-btn:hover { background: rgba(255,255,255,0.2); color: white !important; }
      .navigation-wrapper .mobile-nav-btn.active { background: rgba(255,255,255,0.3); font-weight: 600 !important; }
      @media (max-width: 768px) {
        .navigation-wrapper .sidebar { display: none !important; }
        .navigation-wrapper .mobile-nav { display: flex !important; }
      }
      @media (min-width: 769px) { .navigation-wrapper .mobile-nav { display: none !important; } }
      body > #app > .main-content { margin-left: 180px !important; padding-top: 60px !important; }
      @media (max-width: 768px) { body > #app > .main-content { margin-left: 0 !important; padding-bottom: 60px !important; } }
    `;
    const styleEl = document.createElement('style');
    styleEl.id = 'navigation-styles';
    styleEl.textContent = styles;
    document.head.appendChild(styleEl);
    console.log('[Nav] 样式已注入');
  }

  const installNavigation = (app) => {
    console.log('[Nav] installNavigation called');
    injectStyles();

    // 定义组件选项
    const component = {
      name: 'NavigationComponent',
      props: { currentPage: { type: String, required: true }, isAdmin: { type: Boolean, default: false } },
      mounted() { 
        console.log('[NavigationComponent] 已挂载', this.currentPage, this.isAdmin);
        
        // 在组件挂载后立即渲染导航栏到DOM
        setTimeout(() => {
          const container = this.$el; // 组件根元素
          container.innerHTML = '';
          
          // 渲染侧边栏
          const sidebar = document.createElement('aside');
          sidebar.className = 'sidebar';
          
          const header = document.createElement('div');
          header.className = 'sidebar-header';
          const headerTitle = document.createElement('h3');
          headerTitle.textContent = '宇之然平台';
          header.appendChild(headerTitle);
          
          const nav = document.createElement('nav');
          nav.className = 'sidebar-nav';
          
          const items = [
            { icon: '📊', label: '系统概览', page: '/' },
            { icon: '📋', label: '选题管理', page: 'topics.html' },
            { icon: '📄', label: '系统日志', page: 'logs.html' },
            ...(this.isAdmin ? [{ icon: '👥', label: '用户管理', page: 'users.html' }, { icon: '⚙️', label: '系统管理', page: 'admin.html' }] : [])
          ];
          
          items.forEach(item => {
            const btn = document.createElement('button');
            btn.className = this.currentPage === (item.page === '/' ? 'dashboard' : item.page.replace('.html',''))
              ? 'sidebar-btn active' : 'sidebar-btn';
            btn.textContent = item.icon + ' ' + item.label;
            
            btn.addEventListener('click', () => {
              console.log('[NavigationComponent] 点击导航到:', item.page);
              this.$emit('navigate', item.page);
            });
            
            nav.appendChild(btn);
          });
          
          sidebar.appendChild(header);
          sidebar.appendChild(nav);
          container.appendChild(sidebar);

          // 渲染移动端底部导航
          if (window.innerWidth <= 768) {
            const mobileNav = document.createElement('nav');
            mobileNav.className = 'mobile-nav';
            
            const mobileItems = [
              { icon: '📊', label: '', page: '/' },
              { icon: '📋', label: '选题', page: 'topics.html' },
              { icon: '📄', label: '日志', page: 'logs.html' },
              ...(this.isAdmin ? [{ icon: '👥', label: '用户', page: 'users.html' }, { icon: '⚙️', label: '系统', page: 'admin.html' }] : [])
            ];
            
            mobileItems.forEach(item => {
              const btn = document.createElement('button');
              btn.className = this.currentPage === (item.page === '/' ? 'dashboard' : item.page.replace('.html',''))
                ? 'mobile-nav-btn active' : 'mobile-nav-btn';
              
              const content = item.label ? (item.icon + ' ' + item.label) : item.icon;
              btn.textContent = content;
              
              btn.addEventListener('click', () => {
                console.log('[NavigationComponent] 点击导航到:', item.page);
                this.$emit('navigate', item.page);
              });
              
              mobileNav.appendChild(btn);
            });
            
            container.appendChild(mobileNav);
          }
        }, 0);
      }
    };

    app.component('navigation-component', component);
    console.log('[Nav] 组件已注册');
    return app;
  };

  window.installNavigation = installNavigation;
  console.log('[Nav] 脚本已加载');
})();