import 'package:chicken_farm/apis/index.dart';
import 'package:flutter/material.dart';
import 'package:chicken_farm/components/vb_app_bar.dart';
import 'package:chicken_farm/core/utils/toast.dart';
import 'package:chicken_farm/components/vb_rfid_field.dart';
import 'package:chicken_farm/core/utils/logger.dart';
import 'dart:async';

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

  @override
  State<IndividualWeighingPage> createState() => _IndividualWeighingPageState();
}

class _IndividualWeighingPageState extends State<IndividualWeighingPage> {
  String? _rfid;
  double? _weight;
  bool _isReadingWeight = false;

  // 添加TextController和FocusNode用于重量输入框
  final TextEditingController _weightController = TextEditingController();
  final FocusNode _weightFocusNode = FocusNode();

  // 添加Timer用于延迟处理输入
  Timer? _inputDebounceTimer;
  // 添加超时Timer
  Timer? _timeoutTimer;

  @override
  void dispose() {
    // 释放TextEditingController和FocusNode
    _weightController.dispose();
    _weightFocusNode.dispose();
    // 取消定时器
    _inputDebounceTimer?.cancel();
    _timeoutTimer?.cancel();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: const VberAppBar(title: '个体称重', 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),

            // 重量区域
            _buildWeightSection(),
            const SizedBox(height: 30),

            // 提交按钮
            SizedBox(
              width: double.infinity,
              child: ElevatedButton(
                onPressed: _rfid != null && _weight != null
                    ? _handleSubmit
                    : null,
                style: ElevatedButton.styleFrom(
                  backgroundColor: _rfid != null && _weight != null
                      ? Colors.blue
                      : Colors.grey,
                  foregroundColor: Colors.white,
                ),
                child: const Text('提交'),
              ),
            ),
          ],
        ),
      ),
    );
  }

  Widget _buildRfidSection() {
    return VberRfidField(
      rfid: _rfid,
      onRfidScanned: (rfid) {
        setState(() {
          _rfid = rfid;
        });
        ToastUtil.success('电子编号识别成功');
        _handleReadWeight();
      },
      label: '电子编号',
      placeholder: '未识别',
    );
  }

  Widget _buildWeightSection() {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        const Text('重量(kg)', 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: Row(
            children: [
              Expanded(
                child: TextField(
                  focusNode: _weightFocusNode,
                  controller: _weightController,
                  enabled: _weight == null,
                  decoration: InputDecoration(
                    border: InputBorder.none,
                    hintText: _weight != null
                        ? null
                        : _isReadingWeight
                        ? "正在读取重量"
                        : '请读取重量',
                    hintStyle: TextStyle(
                      color: _isReadingWeight
                          ? Colors.red
                          : _weight != null
                          ? Colors.black
                          : Colors.grey,
                      fontSize: 16,
                    ),
                  ),
                  style: TextStyle(
                    color: _weight != null ? Colors.black : Colors.grey,
                    fontSize: 16,
                  ),
                  keyboardType: TextInputType.numberWithOptions(decimal: true),
                  onChanged: (text) {
                    // 取消之前的定时器
                    _inputDebounceTimer?.cancel();
                    // 设置新的定时器，延时处理输入
                    _inputDebounceTimer = Timer(
                      const Duration(milliseconds: 500),
                      () {
                        if (text.isEmpty) {
                          setState(() {
                            _weight = null;
                          });
                        } else {
                          try {
                            final parsedValue = double.tryParse(text);
                            if (parsedValue != null) {
                              setState(() {
                                _weight = parsedValue;
                              });
                              ToastUtil.success('重量读取成功');
                            }
                            _isReadingWeight = false;
                          } catch (e) {
                            // 输入无效时不更新_weight
                            logger.e('解析重量值失败: $e');
                          }
                        }
                      },
                    );
                  },
                ),
              ),
              if (_weight != null) ...[
                IconButton(
                  icon: const Icon(Icons.refresh, size: 20),
                  onPressed: _handleReadWeight,
                ),
              ] else ...[
                IconButton(
                  icon: _isReadingWeight
                      ? const SizedBox(
                          width: 20,
                          height: 20,
                          child: CircularProgressIndicator(strokeWidth: 2),
                        )
                      : const Icon(Icons.sync, size: 20),
                  onPressed: _handleReadWeight,
                ),
              ],
            ],
          ),
        ),
      ],
    );
  }

  void _handleReadWeight() {
    setState(() {
      _weight = null;
      _weightController.clear();
      _isReadingWeight = true;
    });
    // 重置后输入框获得焦点
    WidgetsBinding.instance.addPostFrameCallback((_) {
      if (mounted) {
        _weightFocusNode.requestFocus();
      }
    });

    // 设置3秒超时
    _timeoutTimer?.cancel(); // 取消之前的超时定时器
    _timeoutTimer = Timer(const Duration(seconds: 15), () {
      if (mounted && _isReadingWeight == true) {
        setState(() {
          _weight = null;
          _isReadingWeight = false;
          _weightFocusNode.unfocus();
        });
        ToastUtil.error('读取重量超时');
      }
    });
  }

  // 提交数据
  void _handleSubmit() {
    final data = {"rfid": _rfid, "weight": _weight};
    apis.breeding.submitApi
        .weight(data)
        .then((_) {
          if (mounted) {
            ScaffoldMessenger.of(context).showSnackBar(
              const SnackBar(
                content: Text('称重提交成功'),
                backgroundColor: Colors.green,
              ),
            );
            // 提交后重置表单
            setState(() {
              _rfid = null;
              _weight = null;
              _weightController.clear();
            });
          }
        })
        .catchError((err) {
          ToastUtil.error('称重提交失败');
          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,
              ),
            );
          }
        });
  }
}