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

abstract class NotifyingListWidget<T> extends StatefulWidget {
  final List<T> items;
  final ValueChanged<T?> onItemSelected;

  const NotifyingListWidget({
    super.key,
    required this.items,
    required this.onItemSelected,
  });
}

class DeviceScanSelection extends NotifyingListWidget<ScanResult> {
  const DeviceScanSelection({
    super.key,
    required super.items,
    required super.onItemSelected,
  });

  @override
  State<DeviceScanSelection> createState() => _DeviceScanSelectionState();
}

class _DeviceScanSelectionState extends State<DeviceScanSelection> {
  int selectedResult = -1;

  @override
  Widget build(BuildContext context) {
    return Expanded(
      child: ListView.separated(
        itemCount: widget.items.length,
        itemBuilder: (context, index) {
          if (index >= widget.items.length) return null;
          final ScanResult result = widget.items[index];
          final String name = firstGiven([
            result.device.advName,
            result.device.platformName,
            "<Unknown>",
          ]);

          return ListTile(
            title: Text(name),
            subtitle: Text(result.device.remoteId.str),
            trailing: Text('RSSI: ${result.rssi}'),
            selectedTileColor: Colors.amber,
            selectedColor: Colors.black,
            onTap: () {
              setState(() {
                selectedResult = index;
              });
              widget.onItemSelected(result);
            },
            selected: selectedResult == index,
          );
        },
        separatorBuilder: (BuildContext context, int index) {
          return Divider();
        },
      ),
    );
  }
}

String firstGiven(List<String> list) {
  return list.firstWhere((s) => s.isNotEmpty, orElse: () => "");
}