import 'package:chicken_farm/apis/index.dart';
import 'package:chicken_farm/components/vb_rfid_field.dart';
import 'package:chicken_farm/modes/rfid/rfid_model.dart';
import 'package:flutter/material.dart';
import 'package:chicken_farm/components/vb_app_bar.dart';
import 'package:chicken_farm/components/vb_dict_select.dart';
import 'package:chicken_farm/core/utils/toast.dart';

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

  @override
  State<BatchCullingPage> createState() => _BatchCullingPageState();
}

class _BatchCullingPageState extends State<BatchCullingPage> {
  final List<String> _rfids = [];
  String? _cullReason;
  String? _disposalMethod;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: const VberAppBar(title: '批量淘汰', showLeftButton: true),
      body: Padding(
        padding: const EdgeInsets.all(16.0),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            // 电子编号区域
            _buildRfidSection(),
            const SizedBox(height: 20),
            // 淘汰原因
            _buildCullReasonSection(),
            const SizedBox(height: 20),
            // 处置方式
            _buildDisposalMethodSection(),
            const SizedBox(height: 20),
            // 提交按钮
            SizedBox(
              width: double.infinity,
              child: ElevatedButton(
                onPressed:
                    _rfids.isNotEmpty &&
                        _cullReason != null &&
                        _disposalMethod != null
                    ? _handleSubmit
                    : null,
                style: ElevatedButton.styleFrom(
                  backgroundColor:
                      _rfids.isNotEmpty &&
                          _cullReason != null &&
                          _disposalMethod != null
                      ? Colors.blue
                      : Colors.grey,
                  foregroundColor: Colors.white,
                ),
                child: const Text('提交'),
              ),
            ),
            const SizedBox(height: 20),
            // 已识别的电子编号列表
            if (_rfids.isNotEmpty) ...[
              Row(
                mainAxisAlignment: MainAxisAlignment.spaceBetween,
                children: [
                  const Text(
                    '已识别的电子编号',
                    style: TextStyle(fontWeight: FontWeight.bold),
                  ),
                  IconButton(
                    icon: const Icon(Icons.clear, size: 18),
                    onPressed: _clearRfids,
                    tooltip: '清空编号',
                  ),
                ],
              ),
              const SizedBox(height: 10),
              Expanded(
                child: Container(
                  padding: const EdgeInsets.all(10),
                  decoration: BoxDecoration(
                    border: Border.all(color: Colors.grey),
                    borderRadius: BorderRadius.circular(8),
                  ),
                  child: ListView.builder(
                    padding: EdgeInsets.zero,
                    itemCount: _rfids.length,
                    itemBuilder: (context, index) {
                      return ListTile(
                        visualDensity: VisualDensity.compact,
                        contentPadding: const EdgeInsets.symmetric(
                          horizontal: 2,
                          vertical: 0,
                        ),
                        title: Text(_rfids[index]),
                        trailing: IconButton(
                          icon: const Icon(
                            Icons.delete,
                            size: 18,
                            color: Colors.red,
                          ),
                          onPressed: () => _removeRfid(index),
                        ),
                      );
                    },
                  ),
                ),
              ),
            ],
            const SizedBox(height: 20),
          ],
        ),
      ),
    );
  }

  Widget _buildRfidSection() {
    return VberRfidField(
      rfids: _rfids,
      onRfidsScanned: (List<RfidModel> scannedRfids) {
        // 过滤出未存在的RFID
        final newRfids = scannedRfids
            .where((rfid) => !_rfids.contains(rfid.uid))
            .toList();

        if (newRfids.isNotEmpty) {
          setState(() {
            // 将新的RFID添加到列表中
            for (var rfid in newRfids) {
              _rfids.insert(0, rfid.uid);
            }
          });
          ToastUtil.success("新增 ${newRfids.length} 枚电子编号");
        } else {
          // 所有RFID都已存在
          ToastUtil.info("电子编号已存在");
        }
      },
      multiple: true,
      label: '电子编号',
      multiplePlaceholder: '未识别',
      multipleFormat: '已识别 %d 枚电子编号',
    );
  }

  Widget _buildCullReasonSection() {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        const Text('淘汰原因', style: TextStyle(fontWeight: FontWeight.bold)),
        const SizedBox(height: 10),
        Container(
          padding: const EdgeInsets.fromLTRB(16, 2, 16, 2),
          decoration: BoxDecoration(
            border: Border.all(color: Colors.grey),
            borderRadius: BorderRadius.circular(8),
          ),
          child: VberDictSelect(
            dictType: 'chicken_cull_reason',
            value: _cullReason,
            onChanged: (value) {
              setState(() {
                _cullReason = value;
              });
            },
            hint: '请选择淘汰原因',
            hideUnderline: true,
          ),
        ),
      ],
    );
  }

  Widget _buildDisposalMethodSection() {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        const Text('处置方式', style: TextStyle(fontWeight: FontWeight.bold)),
        const SizedBox(height: 10),
        Container(
          padding: const EdgeInsets.fromLTRB(16, 2, 16, 2),
          decoration: BoxDecoration(
            border: Border.all(color: Colors.grey),
            borderRadius: BorderRadius.circular(8),
          ),
          child: VberDictSelect(
            dictType: 'chicken_disposal_method',
            value: _disposalMethod,
            onChanged: (value) {
              setState(() {
                _disposalMethod = value;
              });
            },
            hint: '请选择处置方式',
            hideUnderline: true,
          ),
        ),
      ],
    );
  }

  // 移除指定索引的电子编号
  void _removeRfid(int index) {
    setState(() {
      _rfids.removeAt(index);
    });
  }

  // 清空所有已识别的电子编号
  void _clearRfids() {
    setState(() {
      _rfids.clear();
    });
    ToastUtil.info('已清空所有电子编号');
  }

  // 提交数据
  void _handleSubmit() {
    final data = {
      'rfids': _rfids,
      'disposal_method': _disposalMethod,
      'cull_reason': _cullReason,
    };
    apis.breeding.submitApi
        .weight(data)
        .then((_) {
          if (mounted) {
            ScaffoldMessenger.of(context).showSnackBar(
              const SnackBar(
                content: Text('批量淘汰提交成功'),
                backgroundColor: Colors.green,
              ),
            );
            // 提交后重置表单
            setState(() {
              _rfids.clear();
              _disposalMethod = null;
              _cullReason = null;
            });
          }
        })
        .catchError((err) {
          ToastUtil.error('批量淘汰提交失败');
          if (mounted && err != null) {
            String errorMessage = err.toString();
            if (err is Exception) {
              errorMessage = err.toString();
            }
            ScaffoldMessenger.of(context).showSnackBar(
              SnackBar(
                content: Text(errorMessage),
                backgroundColor: Colors.red,
              ),
            );
          }
        });
  }
}