import 'dart:math' as math;
import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:vitalapp/managers/device_controller_manager.dart';
import 'package:vitalapp/pages/medical/widgets/device_status_position.dart';
import 'package:vnote_device_plugin/consts/types.dart';
import 'package:vnote_device_plugin/devices/weight_height.dart';
import 'package:vitalapp/managers/interfaces/models/device.dart';
import 'package:vitalapp/pages/medical/widgets/exam_card.dart';

import 'package:vitalapp/components/dialog_number.dart';
import 'package:vitalapp/pages/medical/controller.dart';
import 'package:vitalapp/pages/medical/models/worker.dart';
import 'package:vitalapp/pages/medical/widgets/device_status.dart';
import 'package:vitalapp/pages/medical/widgets/side_bar.dart';
import 'package:fis_common/logger/logger.dart';
import 'package:vnote_device_plugin/models/exams/weight_height.dart';

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

  @override
  State<BodyWeightHeight> createState() => _ExamBodyWeightState();
}

class _ExamBodyWeightState extends State<BodyWeightHeight> {
  var controller = Get.find<MedicalController>();
  DeviceControllerManager? bmi;
  WeightHeightDeviceWorker? worker;
  bool isConnectFail = false;
  int errorCount = 0;
  WorkerStatus _connectStatus = WorkerStatus.connecting;

  late String _weight = controller.diagnosisDataValue['BMI']?['Weight'] ?? '';
  late String _height = controller.diagnosisDataValue['BMI']?['Height'] ?? '';
  late String _bmi = controller.diagnosisDataValue['BMI']?['Bmi'] ?? '';

  @override
  void initState() {
    WidgetsBinding.instance.addPostFrameCallback((timeStamp) {
      initBmi();
    });
    super.initState();
  }

  Future<void> connect() async {
    await worker!.connect();
  }

  /// 尝试重连
  Future<void> tryReconnect() async {
    if (worker != null) {
      await disconnect();
      await connect();
    }
  }

  Future<void> disconnect() async {
    if (worker != null) {
      await worker!.disconnect();
    }
  }

  void releaseListeners() {
    worker!.connectErrorEvent.removeListener(_onConnectFail);
    worker!.connectedEvent.removeListener(_onConnectSuccess);
    worker!.successEvent.removeListener(_onSuccess);
    worker!.disconnectedEvent.removeListener(_onDisconnected);
  }

  @override
  void dispose() {
    bmi?.dispose();
    bmi = null;
    releaseListeners();
    disconnect();
    worker?.dispose();
    super.dispose();
  }

  void loadListeners() {
    worker!.successEvent.addListener(_onSuccess);
    worker!.connectErrorEvent.addListener(_onConnectFail);
    worker!.connectedEvent.addListener(_onConnectSuccess);
    worker!.disconnectedEvent.addListener(_onDisconnected);
  }

  Future<void> currentDevice() async {
    DeviceModel? device = await controller.getDevice(DeviceTypes.WEIGHTHEIGHT);
    if (device == null) {
      _connectStatus = WorkerStatus.unboundDevice;
      worker = null;
      setState(() {});
      return;
    }
    bmi = DeviceControllerManager(
        DeviceTypes.WEIGHTHEIGHT, device.model, device.mac);
    worker = bmi!.worker as WeightHeightDeviceWorker;
    _connectStatus = bmi!.connectStatus;

    loadListeners();
    connect();
  }

  Future<void> initBmi() async {
    currentDevice();
    await initData();
  }

  Future<void> initData() async {
    _weight = controller.diagnosisDataValue['BMI']?['Weight'] ?? '';
    _height = controller.diagnosisDataValue['BMI']?['Height'] ?? '';
    _bmi = controller.diagnosisDataValue['BMI']?['Bmi'] ?? '';
    logger.i(
        '_ExamBodyWeightState initData _weight:$_weight _height:$_height  _bmi:$_bmi');
    setState(() {});
  }

  void _onSuccess(_, WeightHeightExamData e) {
    _weight = double.parse(e.weight.toStringAsFixed(1)).toString();
    _height = double.parse(e.height.toStringAsFixed(1)).toString();
    if (_height.isNotEmpty && _weight.isNotEmpty) {
      getBmi();
      controller.diagnosisDataValue['BMI'] = {
        'Bmi': _bmi,
        'Weight': _weight,
        'Height': _height,
      };
    } else {
      controller.diagnosisDataValue['BMI'] = {
        'Weight': _weight,
      };
    }

    controller.saveCachedRecord();
    _connectStatus = WorkerStatus.connected;
    setState(() {});
  }

  void _onConnectFail(sender, e) {
    print('连接设备失败');
    logger.i("连接设备失败:${worker!.mac}");
    if (errorCount < 3) {
      errorCount++;
      tryReconnect();
    } else {
      isConnectFail = true;
    }
    _connectStatus = WorkerStatus.connectionFailed;
    setState(() {});
  }

  void _onDisconnected(sender, e) {
    print('设备连接中断');
    logger.i("设备连接中断:${worker!.mac}");
    tryReconnect();
    errorCount = 0;
    _connectStatus = WorkerStatus.disconnected;

    setState(() {});
  }

  void _onConnectSuccess(sender, e) {
    logger.i("设备连接成功:${worker!.mac}");
    isConnectFail = false;
    errorCount = 0;
    _connectStatus = WorkerStatus.connected;
    setState(() {});
  }

  @override
  Widget build(BuildContext context) {
    return ExamCard(
        titleText: const SizedBox(),
        // clickCard: () {},
        content: Stack(
          children: [
            if (!isConnectFail)
              DeviceStatusPosition(
                deviceStatus: DeviceStatus(connectStatus: _connectStatus),
              )
            else
              _buildErrorButton(),
            Column(
              mainAxisAlignment: MainAxisAlignment.start,
              children: [
                SizedBox(
                  height: 45,
                ),
                SideBar(
                  title: '身高',
                  value: _height.isEmpty ? '--' : _height,
                  unit: 'cm',
                  onTap: _inputHeight,
                ),
                const Divider(indent: 30),
                SideBar(
                  title: '体重',
                  value: _weight.isEmpty ? '--' : _weight,
                  hasDevice: true,
                  unit: 'kg',
                  onTap: _inputWeight,
                ),
                const Divider(indent: 30),
                SideBar(
                  title: 'BMI',
                  value: _bmi.isEmpty ? '--' : _bmi,
                  unit: 'kg/m²',
                ),
              ],
            ),
          ],
        ));
  }

  /// 需要封装一下
  Widget _buildErrorButton() {
    return DeviceStatusPosition(
      deviceStatus: Row(
        children: [
          const Text(
            '请确认设备是否启动',
            style: TextStyle(fontSize: 24, color: Colors.red),
          ),
          IconButton(
            onPressed: () {
              tryReconnect();
              setState(() {
                _connectStatus = WorkerStatus.connecting;
                isConnectFail = false;
              });
            },
            icon: const Icon(Icons.refresh),
            iconSize: 32,
          ),
        ],
      ),
    );
  }

  Future<void> _inputWeight() async {
    String? result = await VDialogNumber(
      title: '体重',
      initialValue: _weight,
    ).show();
    if (result?.isNotEmpty ?? false) {
      _weight = result ?? '';
      if (_height.isNotEmpty) {
        getBmi();
      }
      controller.diagnosisDataValue['BMI'] = {
        'Height': _height,
        'Bmi': _bmi,
        'Weight': _weight,
      };

      controller.saveCachedRecord();
    }
    setState(() {});
  }

  void getBmi() {
    if (_weight.isNotEmpty && _height.isNotEmpty) {
      final w = double.parse(_weight);
      final h = double.parse(_height) / 100.0;
      if (h == 0) {
        // 0不能被除
        _bmi = "0";
      } else {
        _bmi = (w / math.pow(h, 2)).toStringAsFixed(1);
      }
      controller.saveCachedRecord();
    }
  }

  Future<void> _inputHeight() async {
    String? result = await VDialogNumber(
      title: '身高',
      initialValue: _height,
    ).show();
    if (result?.isNotEmpty ?? false) {
      _height = result ?? '';

      if (_weight.isNotEmpty) {
        getBmi();
      }
      controller.diagnosisDataValue['BMI'] = {
        'Height': _height,
        'Bmi': _bmi,
        'Weight': _weight,
      };
      controller.saveCachedRecord();
    }
    setState(() {});
  }
}