/*
Thor Server Project
Copyright 2008 Joe Hegarty


This file is part of The Thor Server Project.

The Thor Server Project is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

The Thor Server Project is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public License
along with The Thor Server Project.  If not, see <http://www.gnu.org/licenses/>.
*/

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

namespace ThorServer.Utilities
{
    public static class SpecialMath
    {
        private static Random random = new Random();

        public static int NearestSuperiorPowerOfTwo(int input)
        {
            return (int) Math.Pow(2, Math.Ceiling(
                Math.Log(input) / Math.Log(2)));
        }

        public static int RandomNumber(int min, int max)
        {
            return random.Next(min, max + 1);
        }

        public static int WorkDirection(int oldx, int oldy, int newx, int newy)
        {
            //Moved up/down  
            if (oldx == newx)
            {
                if (oldy < newy)
                {
                    //South  
                    return 4;
                }
                else
                {
                    return 0;
                }

            } //Moved Left  
            else if (oldx > newx)
            {
                if (oldy == newy)
                {
                    return 6;
                }
                else if (oldy < newy)
                {
                    return 5;
                }
                else
                {
                    return 7;
                }

            } //Moved Right  
            else if (oldx < newx)
            {
                if (oldy == newy)
                {
                    return 2;
                }
                else if (oldy < newy)
                {
                    return 3;
                }
                else
                {
                    return 1;
                }
            }

            return 0;
        } 
    }
}