import 'dart:async';

import 'package:flutter_blue_plus/flutter_blue_plus.dart';
import 'package:get/get.dart';

class MeetingConnectController extends GetxController {
  RxString stateStr = '搜索中...'.obs;
  RxBool isRescan = false.obs;
  RxBool isImportedFiles = false.obs;

  late StreamSubscription<List<ScanResult>> _scanResultsSubscription;
  late StreamSubscription<bool> _isScanningSubscription;
  BluetoothDevice? _device;

  @override
  void onInit() {
    super.onInit();
    _scanResultsSubscription = FlutterBluePlus.scanResults.listen((results) {
      for (ScanResult item in results) {
        _handlerScanResult(item);
      }
    });
    _isScanningSubscription = FlutterBluePlus.isScanning.listen((state) {
      if (!state && _device == null) {
        stateStr.value = '未搜索到 AI PEN 设备';
        isRescan.value = true;
      } else {
        stateStr.value = '搜索中...';
        isRescan.value = false;
      }
    });
    startScan();
  }

  @override
  void onClose() {
    _scanResultsSubscription.cancel();
    _isScanningSubscription.cancel();
    _stopScan();
    _disconnect();
    super.onClose();
  }

  Future<void> startScan() async {
    await FlutterBluePlus.startScan(
      timeout: const Duration(seconds: 15),
      withServices: [
        Guid('FFF0'),
      ],
      withNames: ['AI PEN'],
    );
  }

  Future<void> _stopScan() async {
    await FlutterBluePlus.stopScan();
  }

  Future<void> _connect() async {
    await _device?.connect();
  }

  Future<void> _disconnect() async {
    await _device?.disconnect();
  }

  void _handlerScanResult(ScanResult result) async {
    if (result.device.platformName == 'AI PEN') {
      _device = result.device;
      await _stopScan();
      await _connect();
      stateStr.value = '已连接到 AI PEN 设备';
    }
  }
}