import 'dart:collection';

import 'package:flutter/material.dart';
import 'dart:async';
import 'package:get/get.dart';
import 'package:sensor/sensor.dart' as sensor;
import 'dart:math' as math;

void main() {
  Get.put(MainController());
  runApp(const MyApp());
}

class MainController extends GetxController {
  final orientation = sensor.Orientation().obs;
  final scanResults = <sensor.SportWear>[].obs;
  final connectedResults = <sensor.SportWear>[].obs;
  final hrm = sensor.HeartRateMeasurement().obs;
  final position = sensor.Position().obs;

  @override
  void onInit() {
    super.onInit();
    orientation.bindStream(sensor.Sensor.orientationStream);
    scanResults.bindStream(sensor.Sensor.sportWearScanResultStream);
    connectedResults.bindStream(sensor.Sensor.sportWearConnectedStream);
    hrm.bindStream(sensor.Sensor.sportWearHeartRateMeasurementStream);
    position.bindStream(sensor.Sensor.locationStream);
  }

  void scanStart() async {
    await sensor.Sensor.sportWearScanStart();
  }

  void scanStop() {
    sensor.Sensor.api.sportWearScanStop();
  }

  void askEnableBT() async {
    var r = await sensor.Sensor.api.askEnableBluetooth();
  }

  void connect(sensor.SportWear wear) async {
    await sensor.Sensor.sportWearConnect(wear);
    print('点击连接');
  }

  void getLocation()async{
    var l = await sensor.Sensor.getCurrentPosition(force: true);
    print(l);
  }
  void locationStart(){
    sensor.Sensor.locationStart(1.seconds, 0);
  }
  void locationStop(){
    sensor.Sensor.api.locationStop();
  }
  void locationService()async{
    final r = await sensor.Sensor.api.isLocationServiceOpen();
    print('位置服务：$r');
  }

}

class MyApp extends GetView<MainController> {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin example app'),
        ),
        body: ListView(
          children: [
            _Orientation(),
            const Divider(),
            _OrientationView(),
            const Divider(),
            _WearScan(),
            const Divider(),
            _Location(),
            const Divider(),
            _Location2(),
            const Divider(),
          ],
        ),
      ),
    );
  }
}

double _degrees(double radians) {
  return 180 / math.pi * radians;
}

class _Orientation extends GetView<MainController> {
  @override
  Widget build(BuildContext context) {
    return Obx(() {
      var v = controller.orientation.value;

      return Column(
        children: [
          const Text('orientation'),
          Text('x: ${_degrees(v.x)}'),
          Text('y: ${_degrees(v.y)}'),
          Text('z: ${_degrees(v.z)}'),
        ],
      );
    });
  }
}



class _OrientationView extends GetView<MainController> {
  @override
  Widget build(BuildContext context) {
    return Obx(() {
      var v = controller.orientation.value;

      return Stack(
        alignment: Alignment.center,
        children: [
          Image.asset(
            'assets/images/im_compass.png',
            height: 240,
            width: 240,
          ),
          Image.asset(
            'assets/images/im_compass_next_arrow.png',
            height: 150,
            width: 150,
          ),
          Transform.rotate(
            angle: -v.z,
            child:
            Image.asset(
              'assets/images/im_compass_arrow.png',
              height: 220,
              width: 220,
            ),
          ),
        ],
      );
    });
  }
}

class _WearScan extends GetView<MainController> {
  @override
  Widget build(BuildContext context) {
    return Obx(() {
      var children = <Widget>[
        const Text('扫描'),
        Row(
          children: [
            OutlinedButton(
                onPressed: controller.askEnableBT, child: const Text('请求开启')),
            OutlinedButton(
                onPressed: controller.scanStart, child: const Text('扫描')),
            OutlinedButton(
                onPressed: controller.scanStop, child: const Text('停止')),
          ],
        ),
      ];
      var list = controller.scanResults;
      var connected = controller.connectedResults;
      var cm = HashMap<String, bool>();
      for(var one in connected){
        cm[one.address] = true;
      }

      var l = list
          .map((element) {
            var isConnected = cm[element.address]!= null;


            return TextButton(
              onPressed: () => controller.connect(element),
              child: Text(
                  '${element.name} [${element.address}]  rssi: ${element.rssi}'
                      ' ${isConnected?'已连接':''}'));})
          .toList();

      children.addAll(l);

      if(connected.isNotEmpty){
        final device = connected.first;
        final hrm = controller.hrm.value;
        children.add(
          Text('hr: ${hrm.heartRate} is: ${hrm.contactDetected} rr: ${hrm.rrIntervals.length} ts: ${hrm.timestamp.second}')
        );

      }


      return Column(
        children: children,
      );
    });
  }
}
class _Location extends GetView<MainController> {
  @override
  Widget build(BuildContext context) {
    return OutlinedButton(onPressed: controller.getLocation, child: const Text('定位'));
  }
}
class _Location2 extends GetView<MainController> {
  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        Row(
          children: [
            OutlinedButton(onPressed: controller.locationStart, child: const Text('定位开')),
            OutlinedButton(onPressed: controller.locationStop, child: const Text('定位关')),
            OutlinedButton(onPressed: controller.locationService, child: const Text('判断服务')),
          ],
        ),
        Obx((){
          final p = controller.position.value;

          return Text('la: ${p.latitude} lo: ${p.longitude} al: ${p.altitude.toStringAsFixed(1)}\n'
              'bearing: ${p.bearing} speed: ${p.speed} ac: ${p.accuracy}');
        })
      ],
    ) ;
  }
}