using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Cartes
{
    public class Board
    {
        private List<Photo> photos;

        public Board()
        {
            photos = new List<Photo>();
        }

        public int Length
        {
            get
            {
                return photos.Count;
            }
        }

        public void Add(Photo photo)
        {
            photos.Add(photo);
        }

        public void Delete(Photo photo)
        {
            photos.Remove(photo);
        }

        public Photo FindPhoto(int x, int y)
        {
            return photos.LastOrDefault(
                photo => photo.Intersection(x, y));
        }

        public void MoveToFront(Photo photo)
        {
            photos.Remove(photo);
            photos.Add(photo);
        }
    }
}