// 初始化检查
window.onload = async () => {
    try {
        const res = await fetch('./api/auth/status', { credentials: 'include' });
        if(res.status === 401) { window.location.href = './index.html'; return; }
        const data = await res.json();
        if(!data.authenticated) { window.location.href = './index.html'; return; }
        
        document.getElementById('uname').textContent = data.username || 'Admin';
        loadPage('dashboard'); // 默认加载
    } catch(e) { window.location.href = './index.html'; }
};

// 路由加载器

async function loadPage(pageName) {
    const content = document.getElementById('page-content');
    const bar = document.getElementById('progress');
    
    // 侧边栏高亮
    document.querySelectorAll('.nav-item').forEach(el => el.classList.remove('active'));
    document.querySelector(`.nav-item[data-page="${pageName}"]`)?.classList.add('active');
    
    // 进度条动画
    bar.classList.add('active'); bar.style.width = '0%';
    await new Promise(r => requestAnimationFrame(() => { bar.style.width = '80%'; setTimeout(r, 100); }));
    
    try {
        // 🟢 关键修改：fetch 路径必须包含 /static/
        const html = await fetch(`./static/pages/${pageName}.html`).then(r => {
            if(!r.ok) throw new Error('404');
            return r.text();
        });
        content.innerHTML = html;
        
        // 动态加载对应 JS 模块
        // 🟢 关键修改：script src 路径必须包含 /static/
        const script = document.createElement('script');
        script.src = `./static/pages/${pageName}.js?t=${Date.now()}`;
        
        script.onload = () => {
            // 触发模块初始化
            const moduleName = pageName.charAt(0).toUpperCase() + pageName.slice(1) + 'Module';
            if(window[moduleName]?.init) {
                window[moduleName].init();
            }
            bar.style.width = '100%';
            setTimeout(() => bar.classList.remove('active'), 200);
        };
        script.onerror = () => {
             throw new Error('JS Load Failed');
        };
        document.head.appendChild(script);
    } catch(e) {
        content.innerHTML = `<div style="color:var(--error); text-align:center; margin-top:20vh;">页面加载失败: ${e.message}</div>`;
        bar.style.background = 'var(--error)';
        setTimeout(() => { bar.style.width = '100%'; setTimeout(() => { bar.classList.remove('active'); bar.style.background = 'var(--accent)'; }, 200); }, 100);
    }
}


// 侧边栏切换
function toggleSidebar() {
    document.getElementById('app').classList.toggle('collapsed');
}

// 退出登录
async function doLogout() {
    await fetch('./api/logout', { method: 'POST', credentials: 'include' });
    window.location.href = './index.html';
}

// 点击侧边栏事件委托
document.addEventListener('click', (e) => {
    const nav = e.target.closest('.nav-item');
    if(nav) { loadPage(nav.dataset.page); e.preventDefault(); }
});