mchess-client/lib/pages/create_game_widget.dart

import 'dart:developer';

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:go_router/go_router.dart';
import 'package:http/http.dart';
import 'package:mchess/api/game_info.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';
import 'package:mchess/utils/config.dart' as config;
import 'package:mchess/utils/passphrase.dart';
import 'package:universal_platform/universal_platform.dart';

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

  @override
  State<CreateGameWidget> createState() => _CreateGameWidgetState();
}

class _CreateGameWidgetState extends State<CreateGameWidget> {
  late Future<GameInfo?> registerResponse;
  late Future disconnectFuture;
  late ChessGameArguments chessGameArgs;

  @override
  void initState() {
    super.initState();
    disconnectFuture = ConnectionCubit().disonnect();
    disconnectFuture.then((val) {
      registerResponse = createPrivateGame();
      registerResponse.then((val) {
        ConnectionCubit().connectIfNotConnected(
          val!.playerID.toString(),
          val.passphrase,
        );
      });
    });
  }

  @override
  Widget build(BuildContext context) {
    FloatingActionButton? fltnBtn;
    if (UniversalPlatform.isLinux ||
        UniversalPlatform.isMacOS ||
        UniversalPlatform.isWindows) {
      fltnBtn = FloatingActionButton(
        child: const Icon(Icons.cancel),
        onPressed: () {
          context.pop();
        },
      );
    }

    return Scaffold(
      floatingActionButton: fltnBtn,
      body: Center(
        child: FutureBuilder(
            future: disconnectFuture,
            builder: (context, snapshot) {
              if (snapshot.connectionState != ConnectionState.done) {
                return Container();
              } else {
                return FutureBuilder<GameInfo?>(
                  future: registerResponse,
                  builder: (context, snapshot) {
                    if (snapshot.connectionState != ConnectionState.done) {
                      return const SizedBox(
                        height: 100,
                        width: 100,
                        child: CircularProgressIndicator(),
                      );
                    } else {
                      var passphrase =
                          snapshot.data?.passphrase ?? "no passphrase";
                      return BlocListener<ConnectionCubit,
                          ConnectionCubitState>(
                        listener: (context, state) {
                          // We wait for our opponent to connect
                          if (state.opponentConnected) {
                            //TODO: is goNamed the correct way to navigate?
                            context.goNamed('game', pathParameters: {
                              'phrase': passphrase.toURL(),
                            });
                          }
                        },
                        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),
                            Row(
                              mainAxisAlignment: MainAxisAlignment.center,
                              children: [
                                SelectableText(
                                  passphrase,
                                  style: const TextStyle(
                                      fontWeight: FontWeight.bold),
                                ),
                                IconButton(
                                  icon: const Icon(Icons.copy),
                                  onPressed: () async {
                                    await Clipboard.setData(
                                        ClipboardData(text: passphrase));
                                  },
                                )
                              ],
                            ),
                            const SizedBox(height: 25),
                            const CircularProgressIndicator()
                          ],
                        ),
                      );
                    }
                  },
                );
              }
            }),
      ),
    );
  }

  Future<GameInfo?> createPrivateGame() async {
    Response response;

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

      const snackBar = SnackBar(
        backgroundColor: Colors.amberAccent,
        content: Text("mChess server is not responding. Try again or give up"),
      );
      Future.delayed(const Duration(seconds: 2), () {
        if (!context.mounted) return null;

        ScaffoldMessenger.of(context).clearSnackBars();
        ScaffoldMessenger.of(context).showSnackBar(snackBar);
        context.goNamed('lobbySelector'); // We go back to the lobby selector
      });
      return null;
    }

    if (response.statusCode == 200) {
      var info = GameInfo.fromJson(jsonDecode(response.body));
      info.store();
      return info;
    }
    return null;
  }
}