// Admin Panel JavaScript

let currentArticles = [];
let currentResources = [];
let currentTeamMembers = [];

// 检查管理员权限
async function checkAdminAccess() {
    try {
        const response = await window.DAELAPI.auth.checkAuth();
        if (!response.authenticated || !response.user.is_admin) {
            alert('需要管理员权限才能访问此页面');
            window.location.href = 'website.html';
            return false;
        }
        document.getElementById('admin-user').textContent = `管理员: ${response.user.username}`;
        return true;
    } catch (error) {
        alert('无法验证权限，请先登录');
        window.location.href = 'login.html';
        return false;
    }
}

// Tab切换
document.querySelectorAll('.admin-tab').forEach(tab => {
    tab.addEventListener('click', () => {
        const tabName = tab.dataset.tab;
        
        // 更新tab样式
        document.querySelectorAll('.admin-tab').forEach(t => {
            t.classList.remove('active', 'border-black', 'text-black');
            t.classList.add('text-gray-500');
        });
        tab.classList.add('active', 'border-black', 'text-black');
        tab.classList.remove('text-gray-500');
        
        // 更新内容
        document.querySelectorAll('.admin-tab-content').forEach(content => {
            content.classList.add('hidden');
        });
        document.getElementById(`tab-${tabName}`).classList.remove('hidden');
        
        // 加载对应内容
        if (tabName === 'articles') loadArticles();
        else if (tabName === 'resources') loadResources();
        else if (tabName === 'team') loadTeamMembers();
    });
});

// 加载文章列表
async function loadArticles() {
    try {
        const response = await window.DAELAPI.content.getArticles('news', false);
        currentArticles = response.articles;
        displayArticles(currentArticles);
    } catch (error) {
        console.error('Failed to load articles:', error);
        document.getElementById('articles-list').innerHTML = '<p class="text-red-600">加载失败</p>';
    }
}

// 显示文章列表
function displayArticles(articles) {
    const container = document.getElementById('articles-list');
    if (articles.length === 0) {
        container.innerHTML = '<p class="text-gray-500">暂无文章</p>';
        return;
    }
    
    container.innerHTML = articles.map(article => `
        <div class="bg-white border border-gray-200 p-6 rounded">
            <div class="flex justify-between items-start">
                <div class="flex-1">
                    <h3 class="text-lg font-bold mb-2">${article.title}</h3>
                    <p class="text-sm text-gray-500 mb-2">${article.summary || article.content.substring(0, 100)}...</p>
                    <div class="flex gap-4 text-xs text-gray-400">
                        <span>分类: ${article.category}</span>
                        <span>${article.is_protected ? '🔒 受保护' : '公开'}</span>
                        <span>${article.published ? '已发布' : '草稿'}</span>
                        <span>${new Date(article.created_at).toLocaleDateString()}</span>
                    </div>
                </div>
                <div class="flex gap-2 ml-4">
                    <button onclick="editArticle(${article.id})" class="text-sm text-blue-600 hover:text-blue-800">编辑</button>
                    <button onclick="deleteArticle(${article.id})" class="text-sm text-red-600 hover:text-red-800">删除</button>
                </div>
            </div>
        </div>
    `).join('');
}

// 显示文章表单
function showArticleForm(articleId = null) {
    const modal = document.getElementById('article-modal');
    const form = document.getElementById('article-form');
    const title = document.getElementById('article-modal-title');
    
    if (articleId) {
        const article = currentArticles.find(a => a.id === articleId);
        if (article) {
            title.textContent = '编辑文章';
            document.getElementById('article-id').value = article.id;
            document.getElementById('article-title').value = article.title;
            document.getElementById('article-summary').value = article.summary || '';
            document.getElementById('article-content').value = article.content;
            document.getElementById('article-category').value = article.category;
            document.getElementById('article-published').value = article.published.toString();
            document.getElementById('article-protected').checked = article.is_protected;
        }
    } else {
        title.textContent = '新建文章';
        form.reset();
        document.getElementById('article-id').value = '';
    }
    
    modal.classList.remove('hidden');
}

// 关闭文章表单
function closeArticleForm() {
    document.getElementById('article-modal').classList.add('hidden');
}

// 保存文章
async function saveArticle(event) {
    event.preventDefault();
    
    const articleId = document.getElementById('article-id').value;
    const articleData = {
        title: document.getElementById('article-title').value,
        summary: document.getElementById('article-summary').value,
        content: document.getElementById('article-content').value,
        category: document.getElementById('article-category').value,
        published: document.getElementById('article-published').value === 'true',
        is_protected: document.getElementById('article-protected').checked
    };
    
    try {
        if (articleId) {
            await window.DAELAPI.content.updateArticle(articleId, articleData);
        } else {
            await window.DAELAPI.content.createArticle(articleData);
        }
        closeArticleForm();
        loadArticles();
    } catch (error) {
        alert('保存失败: ' + error.message);
    }
}

// 编辑文章
function editArticle(articleId) {
    showArticleForm(articleId);
}

// 删除文章
async function deleteArticle(articleId) {
    if (!confirm('确定要删除这篇文章吗？')) return;
    
    try {
        await window.DAELAPI.content.deleteArticle(articleId);
        loadArticles();
    } catch (error) {
        alert('删除失败: ' + error.message);
    }
}

// 加载资源列表
async function loadResources() {
    try {
        const response = await window.DAELAPI.content.getResources();
        currentResources = response.resources;
        displayResources(currentResources);
    } catch (error) {
        console.error('Failed to load resources:', error);
        document.getElementById('resources-list').innerHTML = '<p class="text-red-600">加载失败</p>';
    }
}

// 显示资源列表
function displayResources(resources) {
    const container = document.getElementById('resources-list');
    if (resources.length === 0) {
        container.innerHTML = '<p class="text-gray-500">暂无资源</p>';
        return;
    }
    
    container.innerHTML = resources.map(resource => `
        <div class="bg-white border border-gray-200 p-6 rounded">
            <div class="flex justify-between items-start">
                <div class="flex-1">
                    <h3 class="text-lg font-bold mb-2">${resource.name}</h3>
                    <p class="text-sm text-gray-500 mb-2">${resource.description || ''}</p>
                    <div class="flex gap-4 text-xs text-gray-400">
                        <span>分类: ${resource.category}</span>
                        <span>${resource.is_protected ? '🔒 受保护' : '公开'}</span>
                        <span>大小: ${(resource.file_size / 1024 / 1024).toFixed(2)} MB</span>
                        <span>下载: ${resource.download_count} 次</span>
                    </div>
                </div>
                <div class="flex gap-2 ml-4">
                    <button onclick="window.DAELAPI.api.downloadResource(${resource.id})" class="text-sm text-blue-600 hover:text-blue-800">下载</button>
                    <button onclick="deleteResource(${resource.id})" class="text-sm text-red-600 hover:text-red-800">删除</button>
                </div>
            </div>
        </div>
    `).join('');
}

// 显示资源表单
function showResourceForm() {
    document.getElementById('resource-modal').classList.remove('hidden');
}

// 关闭资源表单
function closeResourceForm() {
    document.getElementById('resource-modal').classList.add('hidden');
    document.getElementById('resource-form').reset();
}

// 保存资源
async function saveResource(event) {
    event.preventDefault();
    
    const fileInput = document.getElementById('resource-file');
    if (!fileInput.files[0]) {
        alert('请选择文件');
        return;
    }
    
    try {
        await window.DAELAPI.content.uploadResource(
            fileInput.files[0],
            document.getElementById('resource-name').value,
            document.getElementById('resource-description').value,
            document.getElementById('resource-category').value,
            document.getElementById('resource-protected').checked
        );
        closeResourceForm();
        loadResources();
    } catch (error) {
        alert('上传失败: ' + error.message);
    }
}

// 删除资源
async function deleteResource(resourceId) {
    if (!confirm('确定要删除这个资源吗？')) return;
    // 注意：需要添加删除资源的API端点
    alert('删除功能需要后端支持');
}

// 加载团队成员
async function loadTeamMembers() {
    try {
        const response = await window.DAELAPI.content.getTeam();
        currentTeamMembers = response.members;
        displayTeamMembers(currentTeamMembers);
    } catch (error) {
        console.error('Failed to load team members:', error);
        document.getElementById('team-list').innerHTML = '<p class="text-red-600">加载失败</p>';
    }
}

// 显示团队成员
function displayTeamMembers(members) {
    const container = document.getElementById('team-list');
    if (members.length === 0) {
        container.innerHTML = '<p class="text-gray-500">暂无成员</p>';
        return;
    }
    
    container.innerHTML = members.map(member => `
        <div class="bg-white border border-gray-200 p-6 rounded">
            <div class="flex justify-between items-start">
                <div class="flex-1">
                    <h3 class="text-lg font-bold mb-2">${member.name}</h3>
                    <p class="text-sm text-gray-600 mb-2">${member.title || ''}</p>
                    <p class="text-sm text-gray-500 mb-2">${member.bio || ''}</p>
                    <div class="flex gap-4 text-xs text-gray-400">
                        <span>角色: ${member.role}</span>
                        <span>排序: ${member.order}</span>
                    </div>
                </div>
                <div class="flex gap-2 ml-4">
                    <button onclick="editTeamMember(${member.id})" class="text-sm text-blue-600 hover:text-blue-800">编辑</button>
                    <button onclick="deleteTeamMember(${member.id})" class="text-sm text-red-600 hover:text-red-800">删除</button>
                </div>
            </div>
        </div>
    `).join('');
}

// 显示团队成员表单
function showTeamForm(memberId = null) {
    const modal = document.getElementById('team-modal');
    const form = document.getElementById('team-form');
    
    if (memberId) {
        const member = currentTeamMembers.find(m => m.id === memberId);
        if (member) {
            document.getElementById('team-id').value = member.id;
            document.getElementById('team-name').value = member.name;
            document.getElementById('team-title').value = member.title || '';
            document.getElementById('team-title-en').value = member.title_en || '';
            document.getElementById('team-bio').value = member.bio || '';
            document.getElementById('team-bio-en').value = member.bio_en || '';
            document.getElementById('team-role').value = member.role;
            document.getElementById('team-order').value = member.order;
            document.getElementById('team-email').value = member.email || '';
            document.getElementById('team-website').value = member.website || '';
        }
    } else {
        form.reset();
        document.getElementById('team-id').value = '';
    }
    
    modal.classList.remove('hidden');
}

// 关闭团队成员表单
function closeTeamForm() {
    document.getElementById('team-modal').classList.add('hidden');
}

// 保存团队成员
async function saveTeamMember(event) {
    event.preventDefault();
    
    const memberId = document.getElementById('team-id').value;
    const memberData = {
        name: document.getElementById('team-name').value,
        title: document.getElementById('team-title').value,
        title_en: document.getElementById('team-title-en').value,
        bio: document.getElementById('team-bio').value,
        bio_en: document.getElementById('team-bio-en').value,
        role: document.getElementById('team-role').value,
        order: parseInt(document.getElementById('team-order').value) || 0,
        email: document.getElementById('team-email').value,
        website: document.getElementById('team-website').value
    };
    
    try {
        if (memberId) {
            // 更新功能需要后端支持
            alert('更新功能需要后端支持');
        } else {
            await window.DAELAPI.content.createTeamMember(memberData);
        }
        closeTeamForm();
        loadTeamMembers();
    } catch (error) {
        alert('保存失败: ' + error.message);
    }
}

// 编辑团队成员
function editTeamMember(memberId) {
    showTeamForm(memberId);
}

// 删除团队成员
async function deleteTeamMember(memberId) {
    if (!confirm('确定要删除这个成员吗？')) return;
    // 注意：需要添加删除成员的API端点
    alert('删除功能需要后端支持');
}

// 初始化
document.addEventListener('DOMContentLoaded', async () => {
    if (await checkAdminAccess()) {
        loadArticles();
        
        // 退出按钮
        document.getElementById('logout-btn').addEventListener('click', async () => {
            await logout();
        });
    }
});