// Copyright 2017, Paul DeMarco.
// All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

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

class ScanResultTile extends StatelessWidget {
  const ScanResultTile({Key key, this.result, this.onTap}) : super(key: key);

  final ScanResult result;
  final VoidCallback onTap;

  Widget _buildTitle(BuildContext context) {
    if (result.device.name.length > 0) {
      return Column(
        mainAxisAlignment: MainAxisAlignment.start,
        crossAxisAlignment: CrossAxisAlignment.start,
        children: <Widget>[
          Text(result.device.name),
          Text(
            result.device.id.toString(),
            style: Theme.of(context).textTheme.caption,
          )
        ],
      );
    } else {
      return Text(result.device.id.toString());
    }
  }

  Widget _buildAdvRow(BuildContext context, String title, String value) {
    return Padding(
      padding: const EdgeInsets.symmetric(horizontal: 16.0, vertical: 4.0),
      child: Row(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: <Widget>[
          Text(title, style: Theme.of(context).textTheme.caption),
          SizedBox(
            width: 12.0,
          ),
          Expanded(
            child: Text(
              value,
              style: Theme.of(context)
                  .textTheme
                  .caption
                  .apply(color: Colors.black),
              softWrap: true,
            ),
          ),
        ],
      ),
    );
  }

  String getNiceHexArray(List<int> bytes) {
    return '[${bytes.map((i) => i.toRadixString(16).padLeft(2, '0')).join(', ')}]'
        .toUpperCase();
  }

  String getNiceManufacturerData(Map<int, List<int>> data) {
    if (data.isEmpty) {
      return null;
    }
    List<String> res = [];
    data.forEach((id, bytes) {
      res.add(
          '${id.toRadixString(16).toUpperCase()}: ${getNiceHexArray(bytes)}');
    });
    return res.join(', ');
  }

  String getNiceServiceData(Map<String, List<int>> data) {
    if (data.isEmpty) {
      return null;
    }
    List<String> res = [];
    data.forEach((id, bytes) {
      res.add('${id.toUpperCase()}: ${getNiceHexArray(bytes)}');
    });
    return res.join(', ');
  }

  @override
  Widget build(BuildContext context) {
    return ExpansionTile(
      title: _buildTitle(context),
      leading: Text(result.rssi.toString()),
      trailing: RaisedButton(
        child: Text('CONNECT'),
        color: Colors.black,
        textColor: Colors.white,
        onPressed: (result.advertisementData.connectable) ? onTap : null,
      ),
      children: <Widget>[
        _buildAdvRow(
            context, 'Complete Local Name', result.advertisementData.localName),
        _buildAdvRow(context, 'Tx Power Level',
            '${result.advertisementData.txPowerLevel ?? 'N/A'}'),
        _buildAdvRow(
            context,
            'Manufacturer Data',
            getNiceManufacturerData(
                    result.advertisementData.manufacturerData) ??
                'N/A'),
        _buildAdvRow(
            context,
            'Service UUIDs',
            (result.advertisementData.serviceUuids.isNotEmpty)
                ? result.advertisementData.serviceUuids.join(', ').toUpperCase()
                : 'N/A'),
        _buildAdvRow(context, 'Service Data',
            getNiceServiceData(result.advertisementData.serviceData) ?? 'N/A'),
      ],
    );
  }
}

class ServiceTile extends StatelessWidget {
  final BluetoothService service;
  final List<CharacteristicTile> characteristicTiles;

  const ServiceTile({Key key, this.service, this.characteristicTiles})
      : super(key: key);

  @override
  Widget build(BuildContext context) {
    if (characteristicTiles.length > 0) {
      return new ExpansionTile(
        title: new Column(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.start,
          children: <Widget>[
            const Text('Service'),
            new Text(
                '0x${service.uuid.toString().toUpperCase().substring(4, 8)}',
                style: Theme.of(context)
                    .textTheme
                    .body1
                    .copyWith(color: Theme.of(context).textTheme.caption.color))
          ],
        ),
        children: characteristicTiles,
      );
    } else {
      return new ListTile(
        title: const Text('Service'),
        subtitle: new Text(
            '0x${service.uuid.toString().toUpperCase().substring(4, 8)}'),
      );
    }
  }
}

class CharacteristicTile extends StatelessWidget {
  final BluetoothCharacteristic characteristic;
  final List<DescriptorTile> descriptorTiles;
  final VoidCallback onReadPressed;
  final VoidCallback onWritePressed;
  final VoidCallback onNotificationPressed;

  const CharacteristicTile(
      {Key key,
      this.characteristic,
      this.descriptorTiles,
      this.onReadPressed,
      this.onWritePressed,
      this.onNotificationPressed})
      : super(key: key);

  @override
  Widget build(BuildContext context) {
    var actions = new Row(
      mainAxisSize: MainAxisSize.min,
      children: <Widget>[
        new IconButton(
          icon: new Icon(
            Icons.file_download,
            color: Theme.of(context).iconTheme.color.withOpacity(0.5),
          ),
          onPressed: onReadPressed,
        ),
        new IconButton(
          icon: new Icon(Icons.file_upload,
              color: Theme.of(context).iconTheme.color.withOpacity(0.5)),
          onPressed: onWritePressed,
        ),
        new IconButton(
          icon: new Icon(
              characteristic.isNotifying ? Icons.sync_disabled : Icons.sync,
              color: Theme.of(context).iconTheme.color.withOpacity(0.5)),
          onPressed: onNotificationPressed,
        )
      ],
    );

    var title = new Column(
      mainAxisAlignment: MainAxisAlignment.center,
      crossAxisAlignment: CrossAxisAlignment.start,
      children: <Widget>[
        const Text('Characteristic'),
        new Text(
            '0x${characteristic.uuid.toString().toUpperCase().substring(4, 8)}',
            style: Theme.of(context)
                .textTheme
                .body1
                .copyWith(color: Theme.of(context).textTheme.caption.color))
      ],
    );

    if (descriptorTiles.length > 0) {
      return new ExpansionTile(
        title: new ListTile(
          title: title,
          subtitle: new Text(characteristic.value.toString()),
          contentPadding: EdgeInsets.all(0.0),
        ),
        trailing: actions,
        children: descriptorTiles,
      );
    } else {
      return new ListTile(
        title: title,
        subtitle: new Text(characteristic.value.toString()),
        trailing: actions,
      );
    }
  }
}

class DescriptorTile extends StatelessWidget {
  final BluetoothDescriptor descriptor;
  final VoidCallback onReadPressed;
  final VoidCallback onWritePressed;

  const DescriptorTile(
      {Key key, this.descriptor, this.onReadPressed, this.onWritePressed})
      : super(key: key);

  @override
  Widget build(BuildContext context) {
    var title = new Column(
      mainAxisAlignment: MainAxisAlignment.center,
      crossAxisAlignment: CrossAxisAlignment.start,
      children: <Widget>[
        const Text('Descriptor'),
        new Text(
            '0x${descriptor.uuid.toString().toUpperCase().substring(4, 8)}',
            style: Theme.of(context)
                .textTheme
                .body1
                .copyWith(color: Theme.of(context).textTheme.caption.color))
      ],
    );
    return new ListTile(
      title: title,
      subtitle: new Text(descriptor.value.toString()),
      trailing: new Row(
        mainAxisSize: MainAxisSize.min,
        children: <Widget>[
          new IconButton(
            icon: new Icon(
              Icons.file_download,
              color: Theme.of(context).iconTheme.color.withOpacity(0.5),
            ),
            onPressed: onReadPressed,
          ),
          new IconButton(
            icon: new Icon(
              Icons.file_upload,
              color: Theme.of(context).iconTheme.color.withOpacity(0.5),
            ),
            onPressed: onWritePressed,
          )
        ],
      ),
    );
  }
}