import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:widget_with_codeview/widget_with_codeview.dart';
import 'package:arrow_pad/arrow_pad.dart';
import 'package:flutter_reactive_ble/flutter_reactive_ble.dart';
import 'dart:async';
import 'dart:typed_data';

void main() {runApp(MyApp());}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      theme: ThemeData.dark(),
      home: Scaffold(
        body: WidgetWithCodeView(
          child: SomeWidget(),
          filePath: 'lib/main.dart',
          codeLinkPrefix: 'https://google.com?q=',
          iconBackgroundColor: Colors.white,
          iconForegroundColor: Colors.pink,
          labelBackgroundColor: Theme.of(context).canvasColor,
          labelTextStyle:
              TextStyle(color: Theme.of(context).textTheme.bodyLarge!.color),
          showLabelText: true,
)));}}

class SomeWidget extends StatelessWidget{
@override Widget build(BuildContext context){
return Scaffold(
appBar:AppBar(title: Text('app bar')),

drawer: ListView(children:[
  ListTile(title:Text('Home'),onTap:()=>Navigator.of(context).push(Home(1))),
  ListTile(title:Text('Ble'),onTap:()=>Navigator.of(context).push(Ble())),
  ListTile(title:Text('Exit'),onTap:(){})]),

body: Center(child: Text('goto drawer home for help')));}}

class Home extends MaterialPageRoute<void> {
  Home(int id)
      : super(
          builder: (BuildContext context) {
            return Scaffold(
              appBar: AppBar(
                title: Text('Home $id'),
                elevation: 1.0,
              ),
              body: Center(
                child: Text(
 '''               
Demo flutter using
to create new project
  flutter create project_name --empty
  
to add plugin
  flutter pub add plugin_name


  flutter_reactive_blue
  get
  widget_with_codeview
  arrow_pad
  
  edit pubspec.yaml to include  
  flutter:
  uses-material-design: true
  assets:
    - lib/main.dart


  on android setting give the app location permission
             
'''             
                ),
),);},);}

class Ble extends MaterialPageRoute<void> {
  Ble()
      : super(
          builder: (BuildContext context) {
          
String _value = ' ';
List<int> packet=[0,0];
late BleController ble;         
ble=Get.put(BleController());
double height = MediaQuery.of(context).size.height;
double width = MediaQuery.of(context).size.width;
                 
return Scaffold(appBar: AppBar(title: Text('Ble')),

body: Center(child:  SingleChildScrollView(child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: [ 
ElevatedButton(child: Obx(()=>Text('${ble.status.value}')),
  onPressed:ble.connect),
SizedBox(height:50),
ArrowPad(
padding: const EdgeInsets.all(8.0),
height: height / 3,
width: width / 2,
arrowPadIconStyle: ArrowPadIconStyle.arrow,
hoverColor: Colors.green,
iconColor: const Color(0xFF631739),
outerColor: const Color(0xFF86FC8A),
clickTrigger: ClickTrigger.onTapUp,
onPressed: (dir){
if (dir.toString().compareTo('right') == 0)     { packet[1] = 0x72; ble.send(packet);}
else if (dir.toString().compareTo('left') == 0) { packet[1] = 0x41; ble.send(packet);}
else if (dir.toString().compareTo('up') == 0)   { packet[1] = 0x75; ble.send(packet);}
else if (dir.toString().compareTo('down') == 0) { packet[1] = 0x64; ble.send(packet);} }),
SizedBox(height:50),
ElevatedButton(child: Text('stop'),
  onPressed:(){packet[1] = 0x73; ble.send(packet);}),
])))
              
);},);}

class BleController {
final frb = FlutterReactiveBle();
late StreamSubscription<ConnectionStateUpdate> c;
late QualifiedCharacteristic tx;
var status = 'connect to bluetooth'.obs;

void send(val) async{
await frb.writeCharacteristicWithoutResponse(tx, value: val);}    

void connect() async {
status.value = 'connecting...';
c = frb.connectToDevice(id: 'CC:33:31:CF:74:72').listen((state) {
if (state.connectionState == DeviceConnectionState.connected) {
status.value = 'connected!';
tx=QualifiedCharacteristic(
serviceId: Uuid.parse("FFE0"),
characteristicId: Uuid.parse("FFE1"),
deviceId: 'CC:33:31:CF:74:72');}});}}


String comment = '''

micropython code on the pico
from machine import UART, Pin
import time

l=Pin(18,Pin.OUT)
l1=Pin(19,Pin.OUT)
l2=Pin(20,Pin.OUT)
u=UART(0,baudrate=9600,tx=Pin(0),rx=Pin(1))

l.high()
l1.high()
l2.high()
buf=bytearray(2)

while 1:
    time.sleep_ms(50)
    l.high()
    l1.high()
    buf=u.read(2)
    if buf is not None:
        print(buf)
        if buf == b'\x00A': l.low()
        if buf == b'\x00d': l1.low()
        time.sleep_ms(50)
        
''';