{% extends "base.html" %}

{% block title %}分类管理 - ToNav{% endblock %}

{% block content %}
<div class="container admin-layout">
    <!-- 顶部导航 -->
    <div class="admin-header">
        <div class="header-left">
            <h1>📂 分类管理</h1>
            <a href="/admin" class="back-link">← 返回首页</a>
        </div>
        <button class="btn btn-primary" onclick="showCreateModal()">+ 新建分类</button>
    </div>

    <!-- 分类列表 -->
    <div class="categories-list">
        <div class="loading">加载中...</div>
    </div>

    <!-- 创建/编辑弹窗 -->
    <div class="modal" id="categoryModal">
        <div class="modal-content">
            <div class="modal-header">
                <h2 id="modalTitle">新建分类</h2>
                <button class="close-btn" onclick="closeModal()">×</button>
            </div>
            <form id="categoryForm" class="modal-body">
                <input type="hidden" id="categoryId">

                <div class="form-group">
                    <label>分类名称 *</label>
                    <input type="text" id="categoryName" class="input" required>
                </div>

                <div class="form-group">
                    <label>排序权重</label>
                    <input type="number" id="categorySort" class="input" value="0">
                </div>

                <div class="form-actions">
                    <button type="button" class="btn" onclick="closeModal()">取消</button>
                    <button type="submit" class="btn btn-primary">保存</button>
                </div>
            </form>
        </div>
    </div>
</div>

<style>
    :root {
        --main-red: #ff4d4f;
    }

    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }

    body {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        min-height: 100vh;
        padding: 20px;
    }

    .container {
        max-width: 600px;
        margin: 0 auto;
    }

    .admin-header {
        background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
        color: #fff;
        padding: 25px 30px;
        border-radius: 20px 20px 0 0;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    .header-left h1 {
        font-size: 22px;
        font-weight: 700;
    }

    .back-link {
        color: #8c8c8c;
        font-size: 13px;
        text-decoration: none;
    }

    .back-link:hover {
        color: #bfbfbf;
    }

    .categories-list {
        background: #fff;
        padding: 30px;
        border-radius: 0 0 20px 20px;
    }

    .category-item {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 15px 20px;
        background: #fafafa;
        border-radius: 12px;
        margin-bottom: 10px;
        transition: all 0.3s;
    }

    .category-item:hover {
        background: #f0f0f0;
        transform: translateX(5px);
    }

    .category-info {
        display: flex;
        align-items: center;
        gap: 15px;
    }

    .category-icon {
        font-size: 24px;
    }

    .category-name {
        font-size: 16px;
        font-weight: 600;
        color: #262626;
    }

    .category-meta {
        font-size: 12px;
        color: #999;
        margin-left: 10px;
    }

    .category-actions {
        display: flex;
        gap: 8px;
    }

    .action-btn-sm {
        padding: 8px 14px;
        border: 1px solid #d9d9d9;
        background: #fff;
        border-radius: 8px;
        font-size: 13px;
        cursor: pointer;
        transition: all 0.3s;
    }

    .action-btn-sm:hover {
        border-color: var(--main-red);
        color: var(--main-red);
    }

    .action-btn-sm.danger:hover {
        background: #fff2f0;
        border-color: #ff4d4f;
        color: #ff4d4f;
    }

    /* Modal */
    .modal {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0,0,0,0.6);
        z-index: 1000;
        align-items: center;
        justify-content: center;
        animation: fadeIn 0.3s ease;
    }

    .modal.active {
        display: flex;
    }

    @keyframes fadeIn {
        from { opacity: 0; }
        to { opacity: 1; }
    }

    .modal-content {
        background: #fff;
        border-radius: 20px;
        max-width: 500px;
        width: 90%;
        animation: slideUp 0.3s ease;
    }

    @keyframes slideUp {
        from { transform: translateY(50px); opacity: 0; }
        to { transform: translateY(0); opacity: 1; }
    }

    .modal-header {
        padding: 20px 25px;
        background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
        color: #fff;
        display: flex;
        justify-content: space-between;
        align-items: center;
        border-radius: 20px 20px 0 0;
    }

    .modal-header h2 {
        font-size: 18px;
        font-weight: 600;
    }

    .close-btn {
        background: none;
        border: none;
        color: #fff;
        font-size: 28px;
        cursor: pointer;
        padding: 0;
        width: 32px;
        height: 32px;
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: 50%;
    }

    .close-btn:hover {
        background: rgba(255,255,255,0.2);
    }

    .modal-body {
        padding: 25px;
    }

    .form-group {
        margin-bottom: 20px;
    }

    .form-group label {
        display: block;
        margin-bottom: 8px;
        font-size: 14px;
        font-weight: 500;
        color: #262626;
    }

    .input {
        width: 100%;
        padding: 10px 12px;
        border: 1px solid #d9d9d9;
        border-radius: 8px;
        font-size: 14px;
        transition: all 0.3s;
    }

    .input:focus {
        outline: none;
        border-color: var(--main-red);
        box-shadow: 0 0 0 3px rgba(255, 77, 79, 0.1);
    }

    .form-actions {
        display: flex;
        justify-content: flex-end;
        gap: 10px;
    }

    .btn {
        padding: 10px 20px;
        border: none;
        border-radius: 8px;
        font-size: 14px;
        font-weight: 600;
        cursor: pointer;
        transition: all 0.3s;
    }

    .btn-primary {
        background: var(--main-red);
        color: #fff;
        box-shadow: 0 4px 15px rgba(255, 77, 79, 0.4);
    }

    .btn-primary:hover {
        background: #ff7875;
    }

    .loading {
        text-align: center;
        padding: 40px;
        color: #999;
    }

    .empty-state {
        text-align: center;
        padding: 40px;
        color: #999;
    }
</style>
{% endblock %}

{% block scripts %}
<script>
    let allCategories = [];
    let allServices = [];

    // 初始化
    document.addEventListener('DOMContentLoaded', function() {
        loadData();
        setupForm();
    });

    // 加载数据
    async function loadData() {
        try {
            const [catResp, svcResp] = await Promise.all([
                fetch('/api/admin/categories'),
                fetch('/api/admin/services')
            ]);

            if (!catResp.ok) {
                window.location.href = '/admin/login';
                return;
            }

            allCategories = await catResp.json();
            allServices = await svcResp.json();

            renderCategories();
        } catch (err) {
            console.error('加载失败:', err);
            window.location.href = '/admin/login';
        }
    }

    // 渲染分类列表
    function renderCategories() {
        const container = document.querySelector('.categories-list');

        if (allCategories.length === 0) {
            container.innerHTML = '<div class="empty-state">暂无分类</div>';
            return;
        }

        let html = '';
        allCategories.forEach(category => {
            const serviceCount = allServices.filter(s => s.category === category.name).length;

            html += `
                <div class="category-item">
                    <div class="category-info">
                        <span class="category-icon">📂</span>
                        <div>
                            <span class="category-name">${category.name}</span>
                            <span class="category-meta">${serviceCount} 个服务 · 排序 ${category.sort_order}</span>
                        </div>
                    </div>
                    <div class="category-actions">
                        <button class="action-btn-sm" onclick="editCategory(${category.id})">编辑</button>
                        <button class="action-btn-sm danger" onclick="deleteCategory(${category.id}, '${category.name}')">删除</button>
                    </div>
                </div>
            `;
        });

        container.innerHTML = html;
    }

    // 设置表单
    function setupForm() {
        document.getElementById('categoryForm').addEventListener('submit', function(e) {
            e.preventDefault();
            saveCategory();
        });
    }

    // 显示创建弹窗
    function showCreateModal() {
        document.getElementById('modalTitle').textContent = '新建分类';
        document.getElementById('categoryId').value = '';
        document.getElementById('categoryForm').reset();
        document.getElementById('categorySort').value = '0';
        document.getElementById('categoryModal').classList.add('active');
    }

    // 编辑分类
    function editCategory(id) {
        const category = allCategories.find(c => c.id === id);
        if (!category) return;

        document.getElementById('modalTitle').textContent = '编辑分类';
        document.getElementById('categoryId').value = category.id;
        document.getElementById('categoryName').value = category.name;
        document.getElementById('categorySort').value = category.sort_order;

        document.getElementById('categoryModal').classList.add('active');
    }

    // 保存分类
    async function saveCategory() {
        const id = document.getElementById('categoryId').value;
        const data = {
            name: document.getElementById('categoryName').value.trim(),
            sort_order: parseInt(document.getElementById('categorySort').value) || 0
        };

        if (!data.name) {
            alert('分类名称不能为空');
            return;
        }

        try {
            const url = id ? `/api/admin/categories/${id}` : '/api/admin/categories';
            const method = id ? 'PUT' : 'POST';

            const response = await fetch(url, {
                method: method,
                headers: {'Content-Type': 'application/json'},
                body: JSON.stringify(data)
            });

            if (response.ok) {
                closeModal();
                loadData();
            } else {
                const result = await response.json();
                alert(result.error || '保存失败');
            }
        } catch (err) {
            alert('请求失败: ' + err.message);
        }
    }

    // 删除分类
    async function deleteCategory(id, name) {
        const serviceCount = allServices.filter(s => s.category === name).length;
        if (serviceCount > 0) {
            alert(`该分类下有 ${serviceCount} 个服务，无法删除`);
            return;
        }

        if (!confirm(`确定要删除分类"${name}"吗？此操作不可恢复。`)) return;

        try {
            const response = await fetch(`/api/admin/categories/${id}`, {
                method: 'DELETE'
            });

            if (response.ok) {
                loadData();
            } else {
                const result = await response.json();
                alert(result.error || '删除失败');
            }
        } catch (err) {
            alert('请求失败: ' + err.message);
        }
    }

    // 关闭弹窗
    function closeModal() {
        document.getElementById('categoryModal').classList.remove('active');
    }

    // 点击外部关闭弹窗
    document.getElementById('categoryModal').addEventListener('click', function(e) {
        if (e.target === this) {
            closeModal();
        }
    });
</script>
{% endblock %}