import 'package:chicken_farm/components/vb_app_bar.dart';
import 'package:chicken_farm/core/config/default_dicts.dart';
import 'package:chicken_farm/modes/system/dict.dart';
import 'package:chicken_farm/stores/dict_stroe.dart';
import 'package:flutter/material.dart';

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

  @override
  State<DictManagePage> createState() => _DictManagePageState();
}

class _DictManagePageState extends State<DictManagePage> {
  final DictStore _dictStore = DictStore();
  late Future<Map<String, List<DictDataModel>>> _dictsFuture;
  final Set<String> _expandedTypes = <String>{};

  @override
  void initState() {
    super.initState();
    _loadDicts();
  }

  void _loadDicts() {
    setState(() {
      _dictsFuture = _dictStore.getAllOfflineDicts();
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: VberAppBar(title: '字典维护'),
      body: FutureBuilder<Map<String, List<DictDataModel>>>(
        future: _dictsFuture,
        builder: (context, snapshot) {
          if (snapshot.connectionState == ConnectionState.waiting) {
            return const Center(child: CircularProgressIndicator());
          }

          if (snapshot.hasError) {
            return Center(child: Text('加载失败: ${snapshot.error}'));
          }

          final dicts = snapshot.data ?? {};

          if (dicts.isEmpty) {
            return const Center(
              child: Column(
                mainAxisAlignment: MainAxisAlignment.center,
                children: [
                  Icon(Icons.info, size: 48, color: Colors.grey),
                  SizedBox(height: 16),
                  Text('暂无字典数据', style: TextStyle(fontSize: 16)),
                ],
              ),
            );
          }

          return ListView.builder(
            itemCount: dicts.length,
            itemBuilder: (context, index) {
              final dictType = dicts.keys.elementAt(index);
              final dictItems = dicts[dictType] ?? [];
              final dictName = DefaultDicts.getDictName(dictType);
              return Card(
                margin: const EdgeInsets.fromLTRB(16.0, 8.0, 16.0, 8.0),
                child: Theme(
                  data: Theme.of(
                    context,
                  ).copyWith(dividerColor: Colors.transparent),
                  child: ExpansionTile(
                    key: Key(dictType),
                    initiallyExpanded: _expandedTypes.contains(dictType),
                    onExpansionChanged: (expanded) {
                      setState(() {
                        if (expanded) {
                          _expandedTypes.add(dictType);
                        } else {
                          _expandedTypes.remove(dictType);
                        }
                      });
                    },
                    title: Text('$dictName (${dictItems.length})'),
                    children: [
                      if (dictItems.isEmpty)
                        const ListTile(title: Text('该类型下暂无数据'))
                      else
                        ...dictItems.map(
                          (item) => ListTile(
                            title: Text(item.dictLabel),
                            subtitle: Text('值: ${item.dictValue}'),
                            trailing: Row(
                              mainAxisSize: MainAxisSize.min,
                              children: [
                                IconButton(
                                  icon: const Icon(Icons.edit, size: 18),
                                  onPressed: () =>
                                      _editDictItem(dictType, item),
                                ),
                                IconButton(
                                  icon: const Icon(Icons.delete, size: 18),
                                  onPressed: () =>
                                      _deleteDictItem(dictType, item),
                                ),
                              ],
                            ),
                          ),
                        ),
                      ListTile(
                        leading: const Icon(Icons.add, color: Colors.blue),
                        title: const Text('添加新项目'),
                        onTap: () => _addNewDictItem(dictType),
                      ),
                    ],
                  ),
                ),
              );
            },
          );
        },
      ),
    );
  }

  void _addNewDictItem(String dictType) async {
    final labelController = TextEditingController();
    final valueController = TextEditingController();
    final sortController = TextEditingController(text: '0');

    final result = await showDialog<bool>(
      context: context,
      builder: (context) => AlertDialog(
        title: const Text('添加字典项'),
        content: Column(
          mainAxisSize: MainAxisSize.min,
          children: [
            TextField(
              controller: labelController,
              decoration: const InputDecoration(labelText: '标签'),
            ),
            TextField(
              controller: valueController,
              decoration: const InputDecoration(labelText: '值'),
            ),
            TextField(
              controller: sortController,
              decoration: const InputDecoration(labelText: '排序'),
              keyboardType: TextInputType.number,
            ),
          ],
        ),
        actions: [
          TextButton(
            onPressed: () => Navigator.of(context).pop(false),
            child: const Text('取消'),
          ),
          TextButton(
            onPressed: () => Navigator.of(context).pop(true),
            child: const Text('确定'),
          ),
        ],
      ),
    );

    if (result == true) {
      final dictItems = (await _dictStore.getDictByType(dictType)) ?? [];

      // 生成唯一的dictCode
      int maxCode = 0;
      for (final item in dictItems) {
        if (item.dictCode > maxCode) {
          maxCode = item.dictCode;
        }
      }

      final newItem = DictDataModel(
        dictCode: maxCode + 1,
        dictSort: int.tryParse(sortController.text) ?? 0,
        dictLabel: labelController.text,
        dictValue: valueController.text,
        dictType: dictType,
      );

      try {
        await _dictStore.addDictItem(dictType, newItem);
        _loadDicts(); // 重新加载数据
      } catch (e) {
        if (mounted) {
          ScaffoldMessenger.of(
            context,
          ).showSnackBar(SnackBar(content: Text('操作失败: $e')));
        }
      }
    }
  }

  void _editDictItem(String dictType, DictDataModel item) async {
    final labelController = TextEditingController(text: item.dictLabel);
    final valueController = TextEditingController(text: item.dictValue);
    final sortController = TextEditingController(
      text: item.dictSort.toString(),
    );

    final result = await showDialog<bool>(
      context: context,
      builder: (context) => AlertDialog(
        title: const Text('编辑字典项'),
        content: Column(
          mainAxisSize: MainAxisSize.min,
          children: [
            TextField(
              controller: labelController,
              decoration: const InputDecoration(labelText: '标签'),
            ),
            TextField(
              controller: valueController,
              decoration: const InputDecoration(labelText: '值'),
            ),
            TextField(
              controller: sortController,
              decoration: const InputDecoration(labelText: '排序'),
              keyboardType: TextInputType.number,
            ),
          ],
        ),
        actions: [
          TextButton(
            onPressed: () => Navigator.of(context).pop(false),
            child: const Text('取消'),
          ),
          TextButton(
            onPressed: () => Navigator.of(context).pop(true),
            child: const Text('确定'),
          ),
        ],
      ),
    );

    if (result == true) {
      final updatedItem = DictDataModel(
        dictCode: item.dictCode,
        dictSort: int.tryParse(sortController.text) ?? item.dictSort,
        dictLabel: labelController.text,
        dictValue: valueController.text,
        dictType: dictType,
      );

      try {
        await _dictStore.updateDictItem(dictType, updatedItem);
        _loadDicts(); // 重新加载数据
      } catch (e) {
        if (mounted) {
          ScaffoldMessenger.of(
            context,
          ).showSnackBar(SnackBar(content: Text('操作失败: $e')));
        }
      }
    }
  }

  void _deleteDictItem(String dictType, DictDataModel item) async {
    final confirm = await showDialog<bool>(
      context: context,
      builder: (context) => AlertDialog(
        title: const Text('确认删除'),
        content: Text('确定要删除 "${item.dictLabel}" 吗？'),
        actions: [
          TextButton(
            onPressed: () => Navigator.of(context).pop(false),
            child: const Text('取消'),
          ),
          TextButton(
            onPressed: () => Navigator.of(context).pop(true),
            child: const Text('确定'),
          ),
        ],
      ),
    );

    if (confirm == true) {
      try {
        await _dictStore.removeDictItem(dictType, item.dictCode);
        _loadDicts(); // 重新加载数据
      } catch (e) {
        if (mounted) {
          ScaffoldMessenger.of(
            context,
          ).showSnackBar(SnackBar(content: Text('删除失败: $e')));
        }
      }
    }
  }
}