{% extends "admin_base.html" %}

{% block title %}用户管理 - 智联青云管理后台{% endblock %}

{% block admin_content %}
<div class="space-y-6">
    <h1 class="text-2xl font-bold text-slate-900">用户管理</h1>

    <div class="flex gap-4">
        <input id="search-input" type="text" placeholder="搜索用户名/邮箱..." class="flex-1 px-4 py-2 border border-slate-300 rounded-lg text-sm focus:outline-none focus:ring-2 focus:ring-blue-500">
        <select id="role-filter" class="px-4 py-2 border border-slate-300 rounded-lg text-sm focus:outline-none focus:ring-2 focus:ring-blue-500">
            <option value="">全部角色</option>
            <option value="admin">管理员</option>
            <option value="teacher">教师</option>
            <option value="student">学生</option>
        </select>
        <button onclick="loadUsers()" class="px-4 py-2 bg-blue-600 text-white rounded-lg text-sm hover:bg-blue-700">搜索</button>
    </div>

    <div class="bg-white shadow-sm rounded-lg border border-slate-200 overflow-hidden">
        <table class="min-w-full divide-y divide-slate-200">
            <thead class="bg-slate-50">
                <tr>
                    <th class="px-6 py-3 text-left text-xs font-medium text-slate-500 uppercase">ID</th>
                    <th class="px-6 py-3 text-left text-xs font-medium text-slate-500 uppercase">用户名</th>
                    <th class="px-6 py-3 text-left text-xs font-medium text-slate-500 uppercase">邮箱</th>
                    <th class="px-6 py-3 text-left text-xs font-medium text-slate-500 uppercase">角色</th>
                    <th class="px-6 py-3 text-left text-xs font-medium text-slate-500 uppercase">状态</th>
                    <th class="px-6 py-3 text-left text-xs font-medium text-slate-500 uppercase">注册时间</th>
                    <th class="px-6 py-3 text-left text-xs font-medium text-slate-500 uppercase">操作</th>
                </tr>
            </thead>
            <tbody id="users-tbody" class="bg-white divide-y divide-slate-200"></tbody>
        </table>
        <div id="loading-spinner" class="text-center py-8 text-slate-400 hidden">
            <svg class="animate-spin h-6 w-6 mx-auto" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24">
                <circle class="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" stroke-width="4"></circle>
                <path class="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4zm2 5.291A7.962 7.962 0 014 12H0c0 3.042 1.135 5.824 3 7.938l3-2.647z"></path>
            </svg>
            <span class="text-sm">加载中...</span>
        </div>
        <div id="empty-msg" class="text-center py-12 text-slate-400 hidden">暂无用户</div>
    </div>
</div>
{% endblock %}
{% block scripts %}
<script>
const roleMap = {
    'admin': ['管理员', 'bg-red-100 text-red-800'],
    'teacher': ['教师', 'bg-blue-100 text-blue-800'],
    'student': ['学生', 'bg-green-100 text-green-800']
};

async function loadUsers() {
    const q = document.getElementById('search-input').value;
    const role = document.getElementById('role-filter').value;
    const tbody = document.getElementById('users-tbody');
    const spinner = document.getElementById('loading-spinner');
    const empty = document.getElementById('empty-msg');

    tbody.innerHTML = '';
    spinner.classList.remove('hidden');
    empty.classList.add('hidden');

    try {
        const params = new URLSearchParams();
        if (q) params.set('q', q);
        if (role) params.set('role', role);
        const res = await fetch('/api/admin/users?' + params);
        const data = await res.json();
        spinner.classList.add('hidden');

        if (!data.success || !data.users.length) {
            empty.classList.remove('hidden');
            return;
        }

        let html = '';
        data.users.forEach(u => {
            const [roleText, roleClass] = roleMap[u.role] || ['未知', 'bg-slate-100 text-slate-800'];
            const banned = u.is_banned;
            html += `<tr>
                <td class="px-6 py-4 text-sm text-slate-900">${u.id}</td>
                <td class="px-6 py-4 text-sm text-slate-900">${u.name}</td>
                <td class="px-6 py-4 text-sm text-slate-500">${u.email || '-'}</td>
                <td class="px-6 py-4">
                    <span class="px-2 py-1 text-xs rounded-full ${roleClass}">${roleText}</span>
                </td>
                <td class="px-6 py-4">
                    <span class="px-2 py-1 text-xs rounded-full ${banned ? 'bg-red-100 text-red-800' : 'bg-green-100 text-green-800'}">${banned ? '已封禁' : '正常'}</span>
                </td>
                <td class="px-6 py-4 text-sm text-slate-500">${u.created_at}</td>
                <td class="px-6 py-4 space-x-2">
                    <button onclick="toggleBan(${u.id}, ${banned})" class="px-2 py-1 text-xs ${banned ? 'bg-green-100 text-green-700 border-green-300' : 'bg-yellow-100 text-yellow-700 border-yellow-300'} border rounded hover:opacity-80">${banned ? '解封' : '封禁'}</button>
                    <button onclick="deleteUser(${u.id}, '${u.name.replace(/'/g, "\\'")}')" class="px-2 py-1 text-xs bg-red-100 text-red-700 border border-red-300 rounded hover:bg-red-200">删除</button>
                </td>
            </tr>`;
        });
        tbody.innerHTML = html;
    } catch(e) {
        spinner.classList.add('hidden');
        empty.textContent = '加载失败，请稍后重试';
        empty.classList.remove('hidden');
    }
}
async function toggleBan(id, currentlyBanned) {
    if (!confirm(currentlyBanned ? '确定解封该用户？' : '确定封禁该用户？')) return;
    try {
        const res = await fetch(`/api/admin/users/${id}/ban`, {method: 'PUT'});
        const data = await res.json();
        if (data.success) { loadUsers(); } else { alert(data.message || '操作失败'); }
    } catch(e) { alert('网络错误'); }
}

async function deleteUser(id, name) {
    if (!confirm(`确定删除用户「${name}」？此操作不可恢复！`)) return;
    try {
        const res = await fetch(`/api/admin/users/${id}`, {method: 'DELETE'});
        const data = await res.json();
        if (data.success) { loadUsers(); } else { alert(data.message || '操作失败'); }
    } catch(e) { alert('网络错误'); }
}

document.getElementById('search-input').addEventListener('keydown', e => { if (e.key === 'Enter') loadUsers(); });
document.addEventListener('DOMContentLoaded', loadUsers);
</script>
{% endblock %}