import 'package:flutter_test/flutter_test.dart';
import 'package:match_three/game/models/gem.dart';
import 'package:match_three/game/models/grid.dart';
import 'package:match_three/game/systems/match_detector.dart';

void main() {
  group('Match Three Game Tests', () {
    test('Grid initialization creates 8x8 grid', () {
      final grid = GameGrid(width: 8, height: 8);

      for (int row = 0; row < 8; row++) {
        for (int col = 0; col < 8; col++) {
          expect(grid.getGem(row, col), isNotNull);
        }
      }
    });

    test('Grid initialization creates custom size grid', () {
      final grid = GameGrid(width: 5, height: 5);

      for (int row = 0; row < 5; row++) {
        for (int col = 0; col < 5; col++) {
          expect(grid.getGem(row, col), isNotNull);
        }
      }

      // Test that positions outside the grid return null
      expect(grid.getGem(5, 0), isNull);
      expect(grid.getGem(0, 5), isNull);
    });

    test('Match detector validates adjacent positions', () {
      final grid = GameGrid(width: 8, height: 8);

      // Test adjacent positions (should be valid)
      expect(MatchDetector.isValidSwap(grid, 0, 0, 0, 1), isTrue);
      expect(MatchDetector.isValidSwap(grid, 0, 0, 1, 0), isTrue);

      // Test non-adjacent positions (should be invalid)
      expect(MatchDetector.isValidSwap(grid, 0, 0, 0, 2), isFalse);
      expect(MatchDetector.isValidSwap(grid, 0, 0, 2, 0), isFalse);
    });

    test('Gem creation with correct properties', () {
      final gem = Gem(type: 1, row: 2, col: 3);

      expect(gem.type, equals(1));
      expect(gem.row, equals(2));
      expect(gem.col, equals(3));
      expect(gem.isMatched, isFalse);
      expect(gem.isSpecial, isFalse);
    });
  });
}