VitalApp/lib/pages/medical/widgets/heart_rate.dart

import 'dart:async';
import 'dart:convert';

import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:vitalapp/managers/interfaces/models/device.dart';
import 'package:vitalapp/pages/medical/controllers/heart.dart';
import 'package:vitalapp/pages/medical/widgets/device_status.dart';
import 'package:vitalapp/pages/medical/widgets/ecg_view/index.dart';
import 'package:vnote_device_plugin/consts/types.dart';
import 'package:vnote_device_plugin/devices/heart.dart';
import 'package:vitalapp/pages/check/widgets/exam_configurable/exam_card.dart';

import 'package:vitalapp/pages/medical/controller.dart';
import 'package:vitalapp/pages/medical/models/worker.dart';
import 'package:vitalapp/pages/medical/widgets/side_bar.dart';
import 'dart:ui' as ui;
import 'dart:typed_data';

import 'package:vnote_device_plugin/models/exams/heart.dart';

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

  @override
  State<HeartRate> createState() => _HeartRateState();
}

class _HeartRateState extends State<HeartRate> {
  var controller = Get.find<MedicalController>();
  late HeartDeviceController heart;
  late HeartDeviceWorker worker;

  WorkerStatus _connectStatus = WorkerStatus.connecting;
  List<int> ecgPoint = [];

  late String _heart = controller.diagnosisDataValue['Heart']?['HEART'] ?? '';
  late final String _assess =
      controller.diagnosisDataValue['Heart']?['ASSESS'] ?? '';
  late final String _ecg = controller.diagnosisDataValue['Heart']?['ECG'] ?? '';
  late final String _ecgPoint =
      controller.diagnosisDataValue['Heart']?['ECG_POINT'] ?? '';

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

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

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

  void releaseListeners() {
    worker.connectErrorEvent.removeListener(_onConnectFail);
    worker.connectedEvent.removeListener(_onConnectSuccess);
    // worker.successEvent.removeListener(_onSuccess);
    worker.disconnectedEvent.removeListener(_onDisconnected);
    worker.hrValueUpdateEvent.removeListener(_onHrValueUpdate);
    worker.ecgValueUpdateEvent.removeListener(_onEcgValueUpdate);
    worker.resultReceivedEvent.removeListener(_onRCesultReceived);
  }

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

  void loadListeners() {
    // worker.successEvent.addListener(_onSuccess);
    worker.connectErrorEvent.addListener(_onConnectFail);
    worker.connectedEvent.addListener(_onConnectSuccess);
    worker.disconnectedEvent.addListener(_onDisconnected);
    worker.hrValueUpdateEvent.addListener(_onHrValueUpdate);
    worker.ecgValueUpdateEvent.addListener(_onEcgValueUpdate);
    worker.resultReceivedEvent.addListener(_onRCesultReceived);
    worker.connect();
  }

  Future<void> currentDevice() async {
    DeviceModel? device = await controller.getDevice(DeviceTypes.HEART);
    if (device.isNull) {
      _connectStatus = WorkerStatus.unboundDevice;
      setState(() {});
      return;
    }
    heart = HeartDeviceController(device?.model ?? '', device?.mac ?? '');
    worker = heart.worker;
    _connectStatus = heart.connectStatus;

    loadListeners();
  }

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

  Future<void> initData() async {
    await controller.readCachedRecord();
    if (controller.diagnosisDataValue['Heart'] == null) {
      controller.diagnosisDataValue['Heart'] = {};
    }
    setState(() {});
  }

  void _onSuccess(_, double e) {
    setState(() {
      // _weight = e.toString();
      _connectStatus = WorkerStatus.connected;
    });
  }

  void _onHrValueUpdate(_, int e) {
    setState(() {
      _heart = e.toString();
    });
  }

  void _onRCesultReceived(_, HeartExamResult e) {
    setState(() async {
      print(ecgPoint.toString());
      // _heart = e.toString();
      controller.diagnosisDataValue['Heart']?['HEART'] = e.heartRate;
      controller.diagnosisDataValue['Heart']?['ASSESS'] = e.analysis.first;
      controller.diagnosisDataValue['Heart']?['ECG'] =
          await createEcgImageBase64(ecgPoint);
      controller.diagnosisDataValue['Heart']?['ECG_POINT'] =
          ecgPoint.toString();
      print(controller.diagnosisDataValue);
      // late final String _assess =
      //     controller.diagnosisDataValue['Heart']?['ASSESS'] ?? '';
      // late final String _ecg =
      //     controller.diagnosisDataValue['Heart']?['ECG'] ?? '';
      // late final String _ecgPoint =
      //     controller.diagnosisDataValue['Heart']?['ECG_POINT'] ?? '';
    });
  }

  void _onEcgValueUpdate(_, List<int> e) {
    try {
      EcgViewController ecgViewController = Get.find<EcgViewController>();
      ecgPoint.addAll(e);
      if (ecgPoint.length > 125 * 3) {
        ecgViewController.addData(e);
      }
    } catch (e) {
      print(e);
    }
  }

  void _onDeviceCloseSuccess(sender, e) {
    if (e) {
      connect();
    }
  }

  void _onConnectFail(sender, e) {
    print('连接设备失败');
    _connectStatus = WorkerStatus.connectionFailed;
    setState(() {});
  }

  void _onConnectSuccess(sender, e) {
    _connectStatus = WorkerStatus.connected;
    setState(() {});
  }

  void _onDisconnected(sender, e) {
    print('设备连接中断');
    _connectStatus = WorkerStatus.disconnected;
    setState(() {});
  }

  Future<String> createEcgImageBase64(List<int> points) async {
    final int width = points.length ~/ 2;
    const int height = 240;
    final ui.PictureRecorder recorder = ui.PictureRecorder();
    final Canvas canvas = Canvas(recorder);
    final Path path = Path();
    final Paint paint = Paint();
    const double strokeWidth = 1.5;

    paint.color = Colors.green;
    paint.style = PaintingStyle.stroke;
    paint.isAntiAlias = true;
    paint.strokeWidth = strokeWidth;

    path.reset();
    int pointCount = points.length;
    if (pointCount > 0) {
      path.moveTo(0, points[0].toDouble());
      int i = 0;
      int j = pointCount ~/ 2;
      while (i < j) {
        path.lineTo(i.toDouble(), points[i].toDouble());
        path.lineTo((i + 1).toDouble(), points[i + 1].toDouble());
        i += 2;
      }
      canvas.drawPath(path, paint);
    }

    final ui.Picture picture = recorder.endRecording();
    final ui.Image image = await picture.toImage(width, height);
    final ByteData? byteData =
        await image.toByteData(format: ui.ImageByteFormat.png);
    final Uint8List pngBytes = byteData!.buffer.asUint8List();

    final String base64Image = base64Encode(pngBytes);
    return base64Image;
  }

  @override
  Widget build(BuildContext context) {
    return ExamCard(
        titleText: const SizedBox(),
        // clickCard: () {},
        content: Column(
          mainAxisAlignment: MainAxisAlignment.start,
          children: [
            Padding(
                padding: const EdgeInsets.all(10),
                child: DeviceStatus(connectStatus: _connectStatus)),
            SideBar(
              title: '心率',
              value: _heart.isEmpty ? '--' : _heart,
              unit: '',
            ),
            SizedBox(
              height: 240,
              child: LayoutBuilder(builder: (context, constraints) {
                print(constraints.maxWidth);
                print(constraints.maxHeight);
                return EcgView(
                  width: constraints.maxWidth,
                  height: constraints.maxHeight,
                );
              }),
            )
            // CustomPaint(
            //   painter: GridCanvasPainter(),
            //   child: EcgPage(
            //     points: ecgPoint,
            //   ),
            // ),
            // const Divider(indent: 30),
            // Stack(
            //   children: [
            //     SideBar(
            //       title: '心率评估',
            //       value: _assess.isEmpty ? '--' : _assess,
            //       hasDevice: true,
            //       unit: '',
            //     ),
            //     // DeviceStatus(connectStatus: _connectStatus),
            //   ],
            // ),
            // const Divider(indent: 30),
            // MyWidget()
            // const EcgPage(),
            // SideBar(
            //   title: '心电图',
            //   value: _assess.isEmpty ? '--' : _assess,
            //   unit: '',
            // ),
          ],
        ));
  }
}