import 'package:flutter/material.dart';
import 'tile.dart';

class SwapNotifier extends ChangeNotifier {
  Tile? selectedTile;
  int _score = 0;

  int get score => _score;

  void resetScore() {
    _score = 0;
    selectedTile = null;
    notifyListeners();
  }

  void incrementScore(int value) {
    _score += value;
    notifyListeners();
  }

  void selectTile(Tile tile) {
    if (selectedTile == null) {
      selectedTile = tile;
      tile.select();
    } else {
      if (_isNeighbor(selectedTile!, tile)) {
        notifyListeners();
      } else {
        selectedTile?.deselect();
        selectedTile = tile;
        tile.select();
        notifyListeners();
      }
    }
  }

  bool _isNeighbor(Tile tile1, Tile tile2) {
    return (tile1.row == tile2.row && (tile1.col - tile2.col).abs() == 1) ||
        (tile1.col == tile2.col && (tile1.row - tile2.row).abs() == 1);
  }

  void clearSelectedTile() {
    selectedTile = null;
    notifyListeners();
  }
}