mchess-client/lib/pages/join_game_handle_widget.dart

import 'dart:convert';
import 'dart:developer';
import 'dart:io';

import 'package:flutter/material.dart';
import 'package:go_router/go_router.dart';
import 'package:http/http.dart' as http;
import 'package:mchess/api/game_info.dart';
import 'package:mchess/connection_cubit/connection_cubit.dart';
import 'package:mchess/pages/chess_game.dart';
import 'package:mchess/utils/config.dart' as config;

class JoinGameHandleWidget extends StatefulWidget {
  final String passphrase;
  const JoinGameHandleWidget({required this.passphrase, super.key});

  @override
  State<JoinGameHandleWidget> createState() => _JoinGameHandleWidgetState();
}

class _JoinGameHandleWidgetState extends State<JoinGameHandleWidget> {
  late Future<GameInfo?> joinGameFuture;

  @override
  void initState() {
    joinGameFuture = joinPrivateGame(widget.passphrase);
    joinGameFuture.then(
      (value) {
        if (value != null) {
          switchToGame(value);
        }
      },
    );
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return const ChessGame();
  }

  void switchToGame(GameInfo info) {
    var chessGameArgs = ChessGameArguments(
        lobbyID: info.lobbyID!,
        playerID: info.playerID!,
        passphrase: info.passphrase);

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

    if (!chessGameArgs.isValid()) {
      context.goNamed('lobbySelector');
      const snackBar = SnackBar(
        backgroundColor: Colors.amberAccent,
        content: Text("Game information is corrupted"),
      );
      ScaffoldMessenger.of(context).clearSnackBars();
      ScaffoldMessenger.of(context).showSnackBar(snackBar);

      return;
    }
  }

  Future<GameInfo?> joinPrivateGame(String phrase) async {
    http.Response response;
    var existingInfo = await GameInfo.get();
    log('lobbyID: ${existingInfo?.lobbyID} and playerID: ${existingInfo?.playerID} and passphrase: "${existingInfo?.passphrase}"');

    GameInfo info;
    if (existingInfo?.passphrase == phrase) {
      // We have player info for this exact passphrase
      info = GameInfo(
          playerID: existingInfo?.playerID,
          lobbyID: existingInfo?.lobbyID,
          passphrase: phrase);
    } else {
      info = GameInfo(playerID: null, lobbyID: null, passphrase: phrase);
    }

    try {
      response = await http.post(Uri.parse(config.getJoinURL()),
          body: jsonEncode(info), 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"),
      );
      ScaffoldMessenger.of(context).clearSnackBars();
      ScaffoldMessenger.of(context).showSnackBar(snackBar);
      return null;
    }

    if (response.statusCode == HttpStatus.notFound) {
      const snackBar = SnackBar(
        backgroundColor: Colors.amberAccent,
        content: Text("Passphrase could not be found."),
      );

      if (!context.mounted) return null;

      ScaffoldMessenger.of(context).clearSnackBars();
      ScaffoldMessenger.of(context).showSnackBar(snackBar);
      return null;
    }

    if (response.statusCode == HttpStatus.ok) {
      var info = GameInfo.fromJson(jsonDecode(response.body));
      info.store();
      log('Player info received from server: ');
      log('lobbyID: ${info.lobbyID}');
      log('playerID: ${info.playerID}');
      log('passphrase: ${info.passphrase}');

      return info;
    }

    return null;
  }
}