import 'dart:convert';
import 'dart:typed_data';

import 'package:flutter/material.dart';
import 'package:flutter_bluetooth_serial/flutter_bluetooth_serial.dart';

void main() => runApp(const AdbMeApp());

class AdbMeApp extends StatelessWidget {
  const AdbMeApp({super.key});

  @override
  Widget build(BuildContext context) => const MaterialApp(home: PairPage());
}

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

  @override
  State<PairPage> createState() => _PairPageState();
}

class _PairPageState extends State<PairPage> {
  final _token = TextEditingController();
  final _serial = TextEditingController();
  String _result = 'Pair a laptop running scripts/adbme_bluetooth_listener.py';

  Future<void> _status() async {
    final devices = await FlutterBluetoothSerial.instance.getBondedDevices();
    final laptop = await showDialog<BluetoothDevice>(
      context: context,
      builder: (context) => SimpleDialog(children: [
        for (final device in devices) SimpleDialogOption(
          onPressed: () => Navigator.pop(context, device),
          child: Text(device.name ?? device.address),
        ),
      ]),
    );
    if (laptop == null) return;
    final connection = await BluetoothConnection.toAddress(laptop.address);
    connection.output.add(Uint8List.fromList(utf8.encode(jsonEncode({
      'token': _token.text.trim(), 'action': 'status', 'serial': _serial.text.trim(),
    }))));
    await connection.output.allSent;
    final reply = await connection.input!.first;
    setState(() => _result = utf8.decode(reply));
    await connection.close();
  }

  @override
  Widget build(BuildContext context) => Scaffold(
    appBar: AppBar(title: const Text('ADBMe')),
    body: Padding(
      padding: const EdgeInsets.all(16),
      child: Column(children: [
        TextField(controller: _token, obscureText: true, decoration: const InputDecoration(labelText: 'Laptop pairing token')),
        TextField(controller: _serial, decoration: const InputDecoration(labelText: 'ADB serial')),
        const SizedBox(height: 12),
        ElevatedButton(onPressed: _status, child: const Text('Check device status')),
        const SizedBox(height: 12),
        SelectableText(_result),
      ]),
    ),
  );
}