import 'package:flutter/material.dart';
import 'package:werwolf/screens/settings.dart';

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

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

class _PlayerRegistryState extends State<PlayerRegistry> {
  final TextEditingController _playerController = TextEditingController();
  final _formKey = GlobalKey<FormState>();
  String _errorMessage = "";
  List<String> playernames = [];

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text("Werwolf"),
        centerTitle: true,
      ),
      body: Column(
        children: [
          TextField(
            key: _formKey,
            controller: _playerController,
            decoration: InputDecoration(
              errorText: _errorMessage == "" ? null : _errorMessage,
              labelText: 'Spielername',
              labelStyle: const TextStyle(
                color: Colors.white,
              ),
            ),
            style: const TextStyle(color: Colors.white),
            onSubmitted: (value) {
              setState(() {
                if (_playerController.text.isEmpty) {
                  _errorMessage = "Spielername ist leer!";
                } else if (playernames.contains(value)) {
                  _errorMessage = "Dieser Spieler existiert bereits";
                  _playerController.clear();
                } else {
                  _errorMessage = "";
                  _playerController.clear();
                  playernames.add(value);
                }
              });
            },
          ),
          Expanded(
            child: ListView.builder(
              itemCount: playernames.length,
              itemBuilder: (context, index) {
                return ListTile(
                  title: Text(
                    playernames[index],
                    style: const TextStyle(color: Colors.white),
                  ),
                  tileColor: Colors.grey,
                  trailing: IconButton(
                      onPressed: () {
                        setState(() {
                          playernames.remove(playernames[index]);
                        });
                      },
                      icon: const Icon(Icons.remove, color: Colors.white)),
                );
              },
            ),
          ),
          ElevatedButton(
            onPressed: () {
              if (playernames.length >= 6) {
                Navigator.push(
                    context,
                    MaterialPageRoute(
                      builder: (context) => GameSettings(
                        playernames: playernames,
                      ),
                    ));
              } else {
                setState(() {
                  _errorMessage = "Es müssen mindestens 6 Spieler sein!";
                });
              }
            },
            child: const Text('Spiel einstellen'),
          ),
        ],
      ),
    );
  }
}