mchess-client/lib/pages/host_game.dart

import 'dart:developer';

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:go_router/go_router.dart';
import 'package:http/http.dart';
import 'package:mchess/api/register.dart';
import 'package:mchess/chess_bloc/chess_bloc.dart';
import 'package:mchess/chess_bloc/chess_events.dart';
import 'package:mchess/connection_cubit/connection_cubit.dart';
import 'package:http/http.dart' as http;
import 'dart:convert';

import 'package:mchess/pages/chess_game.dart';

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

  @override
  State<HostGameWidget> createState() => _HostGameWidgetState();
}

class _HostGameWidgetState extends State<HostGameWidget> {
  late Future<PlayerInfo?> registerResponse;
  late ChessGameArguments chessGameArgs;

  @override
  void initState() {
    registerResponse = hostPrivateGame();
    connectToWebsocket(registerResponse);

    super.initState();
  }

  void connectToWebsocket(Future<PlayerInfo?> resp) {
    resp.then((value) {
      if (value == null) return;

      chessGameArgs = ChessGameArguments(
          lobbyID: value.lobbyID!,
          playerID: value.playerID!,
          passphrase: value.passphrase);

      ConnectionCubit.getInstance().connect(
        value.playerID!.uuid,
        value.lobbyID!.uuid,
        value.passphrase,
      );
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: FutureBuilder<PlayerInfo?>(
          future: registerResponse,
          builder: (context, snapshot) {
            if (snapshot.connectionState != ConnectionState.done) {
              return const SizedBox(
                height: 100,
                width: 100,
                child: CircularProgressIndicator(),
              );
            } else {
              String passphrase = snapshot.data?.passphrase ?? "no passphrase";
              return BlocListener<ConnectionCubit, ConnectionCubitState>(
                listener: (context, state) {
                  // We wait for our opponent to connect
                  if (state.opponentConnected) {
                    context.push('/game', extra: chessGameArgs);
                  }
                },
                child: Column(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: [
                    Text(
                      'Give this phrase to your friend and sit tight:',
                      style: TextStyle(
                          color: Theme.of(context).colorScheme.primary),
                    ),
                    const SizedBox(height: 25),
                    Text(
                      passphrase,
                      style: const TextStyle(fontWeight: FontWeight.bold),
                    ),
                    const SizedBox(height: 25),
                    const CircularProgressIndicator()
                  ],
                ),
              );
            }
          },
        ),
      ),
      floatingActionButton: FloatingActionButton(
        child: const Icon(Icons.cancel),
        onPressed: () {
          context.push('/');
        },
      ),
    );
  }

  Future<PlayerInfo?> hostPrivateGame() async {
    String addr;
    Response response;

    if (kDebugMode) {
      addr = 'http://localhost:8080/api/hostPrivate';
    } else {
      addr = 'https://chess.sw-gross.de:9999/api/hostPrivate';
    }

    try {
      response = await http
          .get(Uri.parse(addr), headers: {"Accept": "application/json"});
    } catch (e) {
      log(e.toString());

      if (!context.mounted) return null;

      const snackBar = SnackBar(
        backgroundColor: Colors.amberAccent,
        content: Text("mChess server is not responding. Try again or give up"),
      );
      Future.delayed(const Duration(seconds: 2), () {
        ScaffoldMessenger.of(context).clearSnackBars();
        ScaffoldMessenger.of(context).showSnackBar(snackBar);
        context.push('/'); // We go back to the lobby selector
      });
      return null;
    }

    if (response.statusCode == 200) {
      log(response.body);
      return PlayerInfo.fromJson(jsonDecode(response.body));
    }
    return null;
  }
}