super_tik_tac_toe/lib/classic.dart

import 'package:flutter/material.dart';
import 'state.dart';
import 'game.dart';
import "util.dart";

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

  @override
  State<ClassicGame> createState() => _ClassicGameState();
}

class _ClassicGameState extends State<ClassicGame> {
  TTCState turn = TTCState.x;
  List<TTCState> data = [
    TTCState.empty,
    TTCState.empty,
    TTCState.empty,
    TTCState.empty,
    TTCState.empty,
    TTCState.empty,
    TTCState.empty,
    TTCState.empty,
    TTCState.empty,
  ];
  TTCState get winner => Util.checkWin(data);
  bool get ended => winner != TTCState.empty;

  String get turnText => switch (turn) {
        TTCState.empty => "",
        TTCState.x => "X",
        TTCState.o => "O",
      };

  void _nextTurn() => turn = Util.nextTurn(turn);

  Widget _invalidChoiceAlert(TTCState existingValue) {
    return Dialog(
      child: Padding(
        padding: const EdgeInsets.all(10),
        child: Column(
          mainAxisSize: MainAxisSize.min,
          crossAxisAlignment: CrossAxisAlignment.center,
          children: [
            const Text(
              "INVALID CHOICE",
              style: TextStyle(fontWeight: FontWeight.bold),
            ),
            Text("${Util.stateText(existingValue)} already claimed that"),
            ElevatedButton(
                onPressed: () => Navigator.pop(context),
                child: const Text("Ok")),
          ],
        ),
      ),
    );
  }

  bool _checkValidChoice(int index) {
    if (data[index] == TTCState.empty) return true;

    showDialog(
      context: context,
      builder: (context) => _invalidChoiceAlert(data[index]),
    );

    return false;
  }

  void _cellOnTap(int index) {
    if (!_checkValidChoice(index)) {
      return;
    }

    setState(() {
      data[index] = turn;
      _nextTurn();
    });
  }

  void _endedCellOnTap(int index) {
    showDialog(
        context: context,
        builder: (context) {
          return Dialog(
            child: Padding(
              padding: const EdgeInsets.all(10),
              child: Column(
                mainAxisSize: MainAxisSize.min,
                crossAxisAlignment: CrossAxisAlignment.center,
                children: [
                  const Text(
                    "GAME OVER",
                    style: TextStyle(fontWeight: FontWeight.bold),
                  ),
                  Text("${Util.stateText(winner)} has already won"),
                  ElevatedButton(
                      onPressed: () => Navigator.pop(context),
                      child: const Text("Ok")),
                ],
              ),
            ),
          );
        });
  }

  @override
  Widget build(BuildContext context) {
    return Column(
      mainAxisSize: MainAxisSize.min,
      children: [
        const Spacer(flex: 5),
        Center(
            child: Text(
          !ended ? "$turnText's turn" : "${Util.stateText(winner)} wins",
          style: const TextStyle(fontSize: 30, fontWeight: FontWeight.bold),
        )),
        const Spacer(flex: 1),
        TTCGame(
          turn: turn,
          cellOnTapCallback: !ended ? _cellOnTap : _endedCellOnTap,
          data: data,
          cellTextStyle: const TextStyle(fontSize: 40),
        ),
        const Spacer(flex: 5),
      ],
    );
  }
}