import 'dart:math';

import 'package:collection/collection.dart';

abstract class RuleSet {
  int checkRange;
  List<Pattern> patterns;

  bool checkSurvival(int neighbors);
  bool checkBirth(int neighbors);
}

class Pattern<Point> extends DelegatingList<Point> {
  final String _name;
  Pattern(String name, List base)
      : _name = name,
        super(base);

  String get name => _name;
}

class GameOfLife implements RuleSet {
  int checkRange = 1;
  List<Pattern> patterns = [
    // Two blocks, offset
    // ##
    //   ##
    Pattern("Blinker", [
      Point(0, 0),
      Point(1, 0),
      Point(0, 1),
      Point(1, 1),
      Point(2, 2),
      Point(3, 2),
      Point(2, 3),
      Point(3, 3)
    ]),
    // A 'gliding' Spaceship
    //   #
    //    #
    //  ###
    Pattern("SpaceShip", [
      Point(1, 0),
      Point(2, 1),
      Point(2, 2),
      Point(1, 2),
      Point(0, 2),
    ])
  ];

  bool checkSurvival(int neighbors) =>
      neighbors == 2 || neighbors == 3 ? true : false;
  bool checkBirth(int neighbors) => neighbors == 3 ? true : false;
}