@Entity
@Table(name = "games")
public class Game {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    
    @Column(nullable = false, length = 100)
    private String nome;
    
    @Column(columnDefinition = "TEXT")
    private String descricao;
    
    @Column(nullable = false, precision = 10, scale = 2)
    private BigDecimal preco;
    
    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "categoria_id")
    private Category categoria;
    
    // Constructors, getters, setters
}

@Entity
@Table(name = "categories")
public class Category {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    
    @Column(nullable = false, unique = true)
    private String nome;
    
    @OneToMany(mappedBy = "categoria", cascade = CascadeType.ALL)
    private List<Game> games = new ArrayList<>();
}

@RestController
@RequestMapping("/api/games")
@CrossOrigin(origins = "*", allowedHeaders = "*")
public class GameController {
    
    @Autowired
    private GameService gameService;
    
    @GetMapping
    public ResponseEntity<List<Game>> getAll() {
        return ResponseEntity.ok(gameService.findAll());
    }
    
    @GetMapping("/{id}")
    public ResponseEntity<Game> getById(@PathVariable Long id) {
        return gameService.findById(id)
            .map(game -> ResponseEntity.ok(game))
            .orElse(ResponseEntity.notFound().build());
    }
    
    @PostMapping
    public ResponseEntity<Game> create(@Valid @RequestBody Game game) {
        Game savedGame = gameService.save(game);
        return ResponseEntity.status(HttpStatus.CREATED).body(savedGame);
    }
    
    @GetMapping("/categoria/{categoria}")
    public ResponseEntity<List<Game>> getByCategory(@PathVariable String categoria) {
        List<Game> games = gameService.findByCategoriaNomeContainingIgnoreCase(categoria);
        return ResponseEntity.ok(games);
    }
}

@Service
public class GameService {
    
    @Autowired
    private GameRepository gameRepository;
    
    @Autowired
    private CategoryService categoryService;
    
    public List<Game> findAll() {
        return gameRepository.findAll();
    }
    
    public Optional<Game> findById(Long id) {
        return gameRepository.findById(id);
    }
    
    @Transactional
    public Game save(Game game) {
        // Validar categoria
        if (game.getCategoria() != null && game.getCategoria().getId() != null) {
            Category categoria = categoryService.findById(game.getCategoria().getId())
                .orElseThrow(() -> new EntityNotFoundException("Categoria não encontrada"));
            game.setCategoria(categoria);
        }
        
        return gameRepository.save(game);
    }
    
    public List<Game> findByCategoriaNomeContainingIgnoreCase(String categoria) {
        return gameRepository.findByCategoriaNomeContainingIgnoreCase(categoria);
    }
}