import 'package:flutter/material.dart';
import '../../constants/app_constants.dart';
import '../../utils/responsive_layout.dart';

/// 时间: 2026-03-25
/// 功能: 分类页面
/// 介绍: 展示诗词分类，包括场景分类和朝代分类
/// 最新变化: 新建分类页面，支持场景和朝代两大分类

class CategoryPage extends StatefulWidget {
  const CategoryPage({super.key});

  @override
  State<CategoryPage> createState() => _CategoryPageState();
}

class _CategoryPageState extends State<CategoryPage> with SingleTickerProviderStateMixin {
  late TabController _tabController;
  final List<String> _tabCategories = ['场景分类', '朝代分类'];

  static const sceneData = {
    "节日": ["七夕节", "中秋节", "元宵节", "寒食节", "清明节", "端午节", "重阳节", "春节", "节日"],
    "季节": ["三月", "二月", "冬天", "夏天", "春天", "春季", "秋天"],
    "古籍": ["三国志", "三国演义", "三字经", "中庸", "列子", "史记", "后汉书", "吕氏春秋", "商君书", "围炉夜话", "增广贤文", "墨子", "孙子兵法", "孟子", "小窗幽记", "尚书", "左传", "幼学琼林", "庄子", "战国策", "文心雕龙", "易传", "晋书", "汉书", "淮南子", "礼记", "管子", "红楼梦", "老子", "荀子", "菜根谭", "警世通言", "论语", "资治通鉴", "韩非子", "鬼谷子", "古籍", "格言联璧"],
    "情感": ["伤感", "励志", "友情", "思乡", "思念", "感恩", "爱国", "爱情", "离别"],
    "景物": ["庐山", "泰山", "西湖", "长江", "黄河", "边塞", "田园", "山水", "夜景"],
    "天文气象": ["写云", "写雨", "写雪", "写风", "星星", "月亮", "流星"],
    "动植物": ["写鸟", "柳树", "桃花", "梅花", "竹子", "荷花", "菊花"],
    "语言文学": ["对联", "谚语", "一言", "读书", "哲理"],
    "其他": ["母亲", "老师", "户外", "礼物", "酒"]
  };

  static const dynastyData = {
    "主要朝代": ["唐代", "宋代", "元代", "明代", "清代"],
    "古代朝代": ["南北朝", "五代", "隋代"],
    "近现代": ["近现代", "用户投稿", "管理员测试"],
    "其他": ["暂无朝代"]
  };

  @override
  void initState() {
    super.initState();
    _tabController = TabController(length: _tabCategories.length, vsync: this);
  }

  @override
  void dispose() {
    _tabController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    final isDesktop = ResponsiveLayout.isDesktop(context);
    final isTablet = ResponsiveLayout.isTablet(context);
    
    return Scaffold(
      backgroundColor: Theme.of(context).scaffoldBackgroundColor,
      body: Column(
        children: [
          // 自定义标题栏
 
          // Tab栏
          Container(
            padding: const EdgeInsets.symmetric(horizontal: 16),
            child: TabBar(
              controller: _tabController,
              tabs: _tabCategories.map((category) => Tab(text: category)).toList(),
              labelColor: AppConstants.primaryColor,
              unselectedLabelColor: Colors.grey[600],
              indicatorColor: AppConstants.primaryColor,
              indicatorWeight: 3,
              labelStyle: const TextStyle(fontWeight: FontWeight.bold),
            ),
          ),
          // 内容区域
          Expanded(
            child: TabBarView(
              controller: _tabController,
              children: [
                _buildCategoryGrid(sceneData, '场景分类'),
                _buildCategoryGrid(dynastyData, '朝代分类'),
              ],
            ),
          ),
        ],
      ),
    );
  }

  Widget _buildCategoryGrid(Map<String, List<String>> data, String categoryType) {
    return Padding(
      padding: const EdgeInsets.all(16.0),
      child: ListView.builder(
        itemCount: data.keys.length,
        itemBuilder: (context, index) {
          final category = data.keys.elementAt(index);
          final items = data[category]!;
          
          return Card(
            margin: const EdgeInsets.only(bottom: 16.0),
            elevation: 2,
            shape: RoundedRectangleBorder(
              borderRadius: BorderRadius.circular(12),
            ),
            child: Padding(
              padding: const EdgeInsets.all(16.0),
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Text(
                    category,
                    style: Theme.of(context).textTheme.titleLarge?.copyWith(
                      fontWeight: FontWeight.bold,
                      color: Theme.of(context).primaryColor,
                    ),
                  ),
                  const SizedBox(height: 12),
                  Wrap(
                    spacing: 8,
                    runSpacing: 8,
                    children: items.map((item) {
                      return _buildCategoryChip(item, categoryType);
                    }).toList(),
                  ),
                ],
              ),
            ),
          );
        },
      ),
    );
  }

  Widget _buildCategoryChip(String label, String categoryType) {
    return GestureDetector(
      onTap: () {
        // TODO: 跳转到对应分类的诗词列表页面
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(
            content: Text('点击了 $label'),
            duration: const Duration(seconds: 1),
          ),
        );
      },
      child: Container(
        padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 6),
        decoration: BoxDecoration(
          color: Theme.of(context).primaryColor.withValues(alpha: 0.1),
          borderRadius: BorderRadius.circular(16),
          border: Border.all(
            color: Theme.of(context).primaryColor.withValues(alpha: 0.3),
            width: 1,
          ),
        ),
        child: Text(
          label,
          style: TextStyle(
            color: Theme.of(context).primaryColor,
            fontSize: 12,
            fontWeight: FontWeight.w500,
          ),
        ),
      ),
    );
  }
}