/**
 * 认证相关功能
 */
document.addEventListener('DOMContentLoaded', function () {
    // 检查是否已登录
    checkLogin();

    // 登录按钮点击事件
    document.getElementById('btn-login').addEventListener('click', login);

    // 退出按钮点击事件
    document.getElementById('btn-logout').addEventListener('click', logout);

    // 页面加载时自动刷新账号名
    updateAccountName();
});

/**
 * 检查是否已登录
 */
function checkLogin() {
    const token = localStorage.getItem('token');

    if (!token) {
        // 未登录，显示登录模态框
        showLoginModal();
    }
}

/**
 * 登录
 */
async function login() {
    const username = document.getElementById('login-username').value;
    const password = document.getElementById('login-password').value;

    if (!username || !password) {
        showToast('请输入用户名和密码', 'danger');
        return;
    }

    try {
        const response = await fetch('/adminLogin', {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json'
            },
            body: JSON.stringify({
                account: username,
                password: password
            })
        });

        if (!response.ok) {
            const error = await response.text();
            throw new Error(error || '登录失败');
        }

        const data = await response.json();

        // 保存token和账号名到本地存储
        localStorage.setItem('token', data.token);
        localStorage.setItem('account', username);

        // 关闭登录模态框
        const loginModal = bootstrap.Modal.getInstance(document.getElementById('loginModal'));
        loginModal.hide();

        // 显示成功消息
        showToast('登录成功', 'success');

        // 切换到版本管理页面并加载数据
        switchPage('version');
        
        // 加载数据
        loadCategories();
        loadResources();
        // 移除所有modal-backdrop元素
        document.querySelectorAll('.modal-backdrop.fade.show').forEach(el => el.remove());

        // 登录后刷新账号名显示
        updateAccountName();
    } catch (error) {
        showToast(error.message, 'danger');
    }
}

/**
 * 退出登录
 */
async function logout() {
    try {
        const token = localStorage.getItem('token');

        if (token) {
            await fetch('/logout', {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json',
                    'Authorization': `Bearer ${token}`
                },
                body: JSON.stringify({
                    token: token
                })
            });
            showToast("退出登录成功", 'success');
        } else {
            showToast("程序异常", 'danger');
        }
    } catch (error) {
        showToast("退出登录失败", 'danger');
        console.error('退出登录失败:', error);
    } finally {
        // 清除本地存储的token和账号名
        localStorage.removeItem('token');
        localStorage.removeItem('account');

        // 清除分类和资源列表
        const categoryList = document.getElementById('category-list');
        if (categoryList) categoryList.innerHTML = '';
        const resourceList = document.getElementById('resource-list');
        if (resourceList) resourceList.innerHTML = '';
        const versionList = document.getElementById('version-list');
        if (versionList) versionList.innerHTML = '';
        const totalCountEl = document.getElementById('total-count');
        if (totalCountEl) totalCountEl.textContent = '0';

        // 退出后刷新账号名显示
        updateAccountName();

        location.reload();
    }
}

// 新增：页面加载和登录/退出后自动刷新账号名显示
function updateAccountName() {
    const account = localStorage.getItem('account');
    const accountNameSpan = document.getElementById('account-name');
    if (accountNameSpan) {
        accountNameSpan.textContent = account ? account : '未登录';
    }
}
// 页面加载时自动刷新账号名
if (document.readyState === 'loading') {
    document.addEventListener('DOMContentLoaded', updateAccountName);
} else {
    updateAccountName();
}