match-three/lib/game/match_three_game.dart

import 'dart:ui';

import 'package:flame/game.dart';
import 'package:match_three/game/components/gem_component.dart';
import 'package:match_three/game/systems/match_detector.dart';
import 'components/grid_component.dart';
import 'components/background_component.dart';
import 'models/gem.dart';
import '../bloc/game_bloc.dart';

const gridSize = 8 * 64.0 + 32.0; // 8 gems * 64px + padding

class MatchThreeGame extends FlameGame {
  late BackgroundComponent backgroundComponent;
  late GameBloc gameBloc;
  final int levelId;
  final int gridHeight;
  final int gridWidth;
  GridComponent? gridComponent;
  Gem? selectedGem;

  MatchThreeGame(
      {required this.levelId,
      required this.gridHeight,
      required this.gridWidth})
      : super();

  @override
  Future<void> onLoad() async {
    backgroundComponent = BackgroundComponent();
    add(backgroundComponent);

    gridComponent = GridComponent(this, levelId, gridHeight, gridWidth);
    add(gridComponent!);
  }

  @override
  void onGameResize(Vector2 size) {
    super.onGameResize(size);
    // Center the grid on screen
    if (gridComponent != null && hasLayout) {
      gridComponent!.position = Vector2(
        (size.x - gridSize) / 2,
        (size.y - gridSize) / 2,
      );
    }
  }

  void selectGem(Gem gem) {
    print(">>> Selecting gem ${gem.name}(${gem.type}) ${gem.row}, ${gem.col}");
    if (selectedGem == null) {
      selectedGem = gem;
      return;
    }
    var theGem = selectedGem;
    selectedGem = null;
    if (MatchDetector.isValidSwap(
        gridComponent!.gameGrid, theGem!.row, theGem.col, gem.row, gem.col)) {
      // Attempt swap
      print(
          ")) Valid swapping ${theGem.row}, ${theGem.col} with ${gem.row}, ${gem.col}");

      gameBloc.add(SwapGems(
        theGem.row,
        theGem.col,
        gem.row,
        gem.col,
      ));
    } else {
      print(
          "(( Invalid swapping ${theGem.row}, ${theGem.col} with ${gem.row}, ${gem.col}");
    }
    if (gridComponent == null) {
      return;
    }
    for (var comp in gridComponent!.children) {
      if (comp is GemComponent && comp.gem != gem) {
        comp.isSelected = false;
      }
    }
  }

  void setGameBloc(GameBloc bloc) {
    gameBloc = bloc;
  }
}