import 'dart:typed_data';
import 'package:flutter/material.dart';
import 'package:quick_usb/quick_usb.dart';

void main() {
  runApp(const MyHome());
}

class MyHome extends StatelessWidget {
  const MyHome({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin example app'),
        ),
        body: const MyApp(),
      ),
    );
  }
}

class MyApp extends StatefulWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  @override
  Widget build(BuildContext context) {
    return _buildColumn();
  }

  Widget _buildColumn() {
    return Column(
      children: [
        _initExit(),
        _getDeviceList(),
        _getDevicesWithDescription(),
        _getDeviceDescription(),
        _hasRequest(),
        _openClose(),
        _getSetConfiguration(),
        _claimReleaseInterface(),
        _bulkTransfer(),
      ],
    );
  }

  Widget _initExit() {
    return Row(
      mainAxisAlignment: MainAxisAlignment.spaceEvenly,
      children: [
        ElevatedButton(
          child: const Text('init'),
          onPressed: () async {
            var init = await QuickUsb.init();
            print('init $init');
          },
        ),
        ElevatedButton(
          child: const Text('exit'),
          onPressed: () async {
            await QuickUsb.exit();
            print('exit');
          },
        ),
      ],
    );
  }

  List<UsbDevice>? _deviceList;
  UsbDevice? _correctDevice;
  static const int _devicePID = 0xea60;
  static const int _deviceVID = 0x10c4;

  Widget _getDeviceList() {
    return ElevatedButton(
      child: const Text('getDeviceList'),
      onPressed: () async {
        _deviceList = await QuickUsb.getDeviceList();
        print('deviceList: ');
        if (_deviceList != null) {
          for (var i in _deviceList!) {
            print(i);
            if (i.productId == _devicePID && i.vendorId == _deviceVID) {
              _correctDevice = i;
              print('correct device found');
            }
          }
        }
      },
    );
  }

  Widget _getDevicesWithDescription() {
    return ElevatedButton(
      child: const Text('getDevicesWithDescription'),
      onPressed: () async {
        var descriptions = await QuickUsb.getDevicesWithDescription();
        _deviceList = descriptions.map((e) => e.device).toList();
        print('descriptions: ');
        for (var i in descriptions) {
          print(i);
        }
      },
    );
  }

  Widget _getDeviceDescription() {
    return ElevatedButton(
      child: const Text('getDeviceDescription'),
      onPressed: () async {
        if (_correctDevice == null) {
          print('Description of the first device from devicelist:');
          var description =
              await QuickUsb.getDeviceDescription(_deviceList!.first);
          print('description ${description.toMap()}');
        } else {
          var description =
              await QuickUsb.getDeviceDescription(_correctDevice!);
          print('description ${description.toMap()}');
        }
      },
    );
  }

  Widget _hasRequest() {
    return Row(
      mainAxisAlignment: MainAxisAlignment.spaceEvenly,
      children: [
        ElevatedButton(
          child: const Text('hasPermission'),
          onPressed: () async {
            if (_correctDevice == null) {
              var hasPermission =
                  await QuickUsb.hasPermission(_deviceList!.first);
              print('first device hasPermission $hasPermission');
            } else {
              var hasPermission = await QuickUsb.hasPermission(_correctDevice!);
              print('correct device hasPermission $hasPermission');
            }
          },
        ),
        ElevatedButton(
          child: const Text('requestPermission'),
          onPressed: () async {
            if (_correctDevice == null) {
              await QuickUsb.requestPermission(_deviceList!.first);
              print('first device requestPermission');
            } else {
              await QuickUsb.requestPermission(_correctDevice!);
              print('correct device requestPermission');
            }
          },
        ),
      ],
    );
  }

  Widget _openClose() {
    return Row(
      mainAxisAlignment: MainAxisAlignment.spaceEvenly,
      children: [
        ElevatedButton(
          child: const Text('openDevice'),
          onPressed: () async {
            if (_correctDevice == null) {
              var openDevice = await QuickUsb.openDevice(_deviceList!.first);
              print('first device openDevice $openDevice');
            }
            else{
              var openDevice = await QuickUsb.openDevice(_correctDevice!);
              print('correct device openDevice $openDevice');
            }
          },
        ),
        ElevatedButton(
          child: const Text('closeDevice'),
          onPressed: () async {
            await QuickUsb.closeDevice();
            print('closeDevice');
          },
        ),
      ],
    );
  }

  UsbConfiguration? _configuration;

  Widget _getSetConfiguration() {
    return Row(
      mainAxisAlignment: MainAxisAlignment.spaceEvenly,
      children: [
        ElevatedButton(
          child: const Text('getConfiguration'),
          onPressed: () async {
            _configuration = await QuickUsb.getConfiguration(0);
            print('getConfiguration $_configuration');
          },
        ),
        ElevatedButton(
          child: const Text('setConfiguration'),
          onPressed: () async {
            var setConfiguration =
                await QuickUsb.setConfiguration(_configuration!);
            print('setConfiguration $setConfiguration');
          },
        ),
      ],
    );
  }

  Widget _claimReleaseInterface() {
    return Row(
      mainAxisAlignment: MainAxisAlignment.spaceEvenly,
      children: [
        ElevatedButton(
          child: const Text('claimInterface'),
          onPressed: () async {
            var claimInterface =
                await QuickUsb.claimInterface(_configuration!.interfaces[0]);
            print('claimInterface $claimInterface');
          },
        ),
        ElevatedButton(
          child: const Text('releaseInterface'),
          onPressed: () async {
            var releaseInterface =
                await QuickUsb.releaseInterface(_configuration!.interfaces[0]);
            print('releaseInterface $releaseInterface');
          },
        ),
      ],
    );
  }

  Widget _bulkTransfer() {
    return Row(
      mainAxisAlignment: MainAxisAlignment.spaceEvenly,
      children: [
        ElevatedButton(
          child: const Text('bulkTransferIn'),
          onPressed: () async {
            var endpoint = _configuration!.interfaces[0].endpoints
                .firstWhere((e) => e.direction == UsbEndpoint.DIRECTION_IN);
            var bulkTransferIn = await QuickUsb.bulkTransferIn(endpoint, 1024);
            print('bulkTransferIn $bulkTransferIn');
          },
        ),
        ElevatedButton(
          child: const Text('bulkTransferOut'),
          onPressed: () async {
            var data = Uint8List.fromList([0x20, 0x32]);
            var endpoint = _configuration!.interfaces[0].endpoints
                .firstWhere((e) => e.direction == UsbEndpoint.DIRECTION_OUT);
            var bulkTransferOut =
                await QuickUsb.bulkTransferOut(endpoint, data);
            print('bulkTransferOut $bulkTransferOut');
          },
        ),
      ],
    );
  }
}