using System;
using SnowLight.Specialized;

namespace SnowLight.Game.Pathfinding
{
    public static class Rotation
    {
        public static int Calculate(Vector2 PositionOne, Vector2 PositionTwo)
        {
            if (PositionOne.X > PositionTwo.X && PositionOne.Y > PositionTwo.Y)
            {
                return 7;
            }
            else if (PositionOne.X < PositionTwo.X && PositionOne.Y < PositionTwo.Y)
            {
                return 3;
            }
            else if (PositionOne.X > PositionTwo.X && PositionOne.Y < PositionTwo.Y)
            {
                return 5;
            }
            else if (PositionOne.X < PositionTwo.X && PositionOne.Y > PositionTwo.Y)
            {
                return 1;
            }
            else if (PositionOne.X > PositionTwo.X)
            {
                return 6;
            }
            else if (PositionOne.X < PositionTwo.X)
            {
                return 2;
            }
            else if (PositionOne.Y < PositionTwo.Y)
            {
                return 4;
            }
            else if (PositionOne.Y > PositionTwo.Y)
            {
                return 0;
            }

            return 0;
        }

        public static int CalculateBackwards(Vector2 PositionOne, Vector2 PositionTwo)
        {
            if (PositionOne.X > PositionTwo.X && PositionOne.Y > PositionTwo.Y)
            {
                return 3;
            }
            else if (PositionOne.X < PositionTwo.X && PositionOne.Y < PositionTwo.Y)
            {
                return 7;
            }
            else if (PositionOne.X > PositionTwo.X && PositionOne.Y < PositionTwo.Y)
            {
                return 1;
            }
            else if (PositionOne.X < PositionTwo.X && PositionOne.Y > PositionTwo.Y)
            {
                return 5;
            }
            else if (PositionOne.X > PositionTwo.X)
            {
                return 2;
            }
            else if (PositionOne.X < PositionTwo.X)
            {
                return 6;
            }
            else if (PositionOne.Y < PositionTwo.Y)
            {
                return 0;
            }
            else if (PositionOne.Y > PositionTwo.Y)
            {
                return 4;
            }

            return 0;
        }
    }
}