using System.Collections.Generic;
using System.Linq;

namespace Life.Automaton
{
    public class MooreField : BasicField
    {
        public MooreField(int width, int height) : base(width, height)
        {
        }

        public override IEnumerable<Cell> Neighbours(int x, int y)
        {
            var potential = new []
            {
                (x - 1, y + 1), (x, y + 1), (x + 1, y + 1),
                (x - 1, y)  /*, (x, y)  */, (x + 1, y),
                (x - 1, y - 1), (x, y - 1), (x + 1, y - 1),
            };

            return potential
                .Where(c => c.Item1 >= 0 && c.Item1 < Size.Width && c.Item2 >= 0 && c.Item2 < Size.Height)
                .Select(c => this[c.Item1, c.Item2]);
        }

        public override string ToString()
        {
            return $"MooreField {Size.Width} x {Size.Height}";
        }
    }
}