using SharpDX;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using CodeWalker.GameFiles;

namespace CodeWalker
{
    public static class Vectors
    {
        public static Vector3 XYZ(this Vector4 v)
        {
            return new Vector3(v.X, v.Y, v.Z);
        }

        public static Vector3 Round(this Vector3 v)
        {
            return new Vector3((float)Math.Round(v.X), (float)Math.Round(v.Y), (float)Math.Round(v.Z));
        }

        public static Vector3 GetPerpVec(this Vector3 n)
        {
            //make a vector perpendicular to the given one
            float nx = Math.Abs(n.X);
            float ny = Math.Abs(n.Y);
            float nz = Math.Abs(n.Z);
            if ((nx < ny) && (nx < nz))
            {
                return Vector3.Cross(n, Vector3.Right);
            }
            else if (ny < nz)
            {
                return Vector3.Cross(n, Vector3.Up);
            }
            else
            {
                return Vector3.Cross(n, Vector3.ForwardLH);
            }
        }


        public static Vector4 Floor(this Vector4 v)
        {
            return new Vector4((float)Math.Floor(v.X), (float)Math.Floor(v.Y), (float)Math.Floor(v.Z), (float)Math.Floor(v.W));
        }

        public static Vector4 Abs(this Vector4 v)
        {
            return new Vector4(Math.Abs(v.X), Math.Abs(v.Y), Math.Abs(v.Z), Math.Abs(v.W));
        }

        public static Quaternion ToQuaternion(this Vector4 v)
        {
            return new Quaternion(v);
        }
    }


    public struct Vector2I
    {
        public int X;
        public int Y;

        public Vector2I(int x, int y)
        {
            X = x;
            Y = y;
        }
        public Vector2I(Vector2 v)
        {
            X = (int)Math.Floor(v.X);
            Y = (int)Math.Floor(v.Y);
        }

        public override string ToString()
        {
            return X.ToString() + ", " + Y.ToString();
        }


        public static Vector2I operator +(Vector2I a, Vector2I b)
        {
            return new Vector2I(a.X + b.X, a.Y + b.Y);
        }

        public static Vector2I operator -(Vector2I a, Vector2I b)
        {
            return new Vector2I(a.X - b.X, a.Y - b.Y);
        }

    }
}