using System;
using System.Collections.Generic;
using System.Text;

namespace DW.Data.World

{
	/// <summary>
	/// Class describes a set of Tile Coordinates X, Y
	/// </summary>
    public class TileCoordinates : IComparable
    {
    	// X coordinate
        private int x;
        
        // Y coordinate
        private int y;

        /// <summary>
        /// Gets the X coordinate.
        /// </summary>
        public int X
        {
            get { return x; }
            set { x = value; }
        }

        /// <summary>
        /// Gets the Y coordinate
        /// </summary>
        public int Y
        {
            get { return y; }
            set { y = value; }
        }

        /// <summary>
        /// Constructor.
        /// </summary>
        public TileCoordinates()
        {
            x = 0;
            y = 0;
        }

        /// <summary>
        /// Constructor
        /// </summary>
        /// <param name="x">X coordinate.</param>
        /// <param name="y">Y coordinate.</param>
        public TileCoordinates(int x, int y)
        {
            this.x = x;
            this.y = y;
        }

        /// <summary>
        /// Constructor
        /// </summary>
        /// <param name="x">X coordinate.</param>
        /// <param name="y">Y coordinate.</param>
        public TileCoordinates(float x, float y)
        {
            this.x = (int)x;
            this.y = (int)y;
        }

        public override bool Equals(object obj)
        {
            if (obj == null || !(obj is TileCoordinates))
            {
                return false;
            }

            TileCoordinates tc = (TileCoordinates)obj;
            return this.X == tc.X && this.Y == tc.Y;
        }

        public override int GetHashCode()
        {
            return this.X * this.Y;
        }

        #region IComparable Members

        public int CompareTo(object obj)
        {
            if (!(obj is TileCoordinates))
            {
                return -1;
            }

            TileCoordinates tc = (TileCoordinates) obj;

            if (this.Equals(obj))
            {
                return 0;
            }
            else if (this.X <= tc.X && this.Y <= tc.Y)
            {
                return -1;
            }
            else
            {
                return 1;
            }            
        }

        #endregion
    }
}