using UnityEngine;

namespace Metamesh
{
    public class IsoVector
    {
        public int x;
        public int y;

        public IsoVector(int x, int y)
        {
            this.x = x;
            this.y = y;
        }

        public IsoVector Clone()
        {
            return new IsoVector(x, y);
        }

        public IsoVector Rotate60About(IsoVector other)
        {
            var x = this.x;
            this.x = other.x + other.y - this.y;
            this.y = x + this.y - other.x;
            return this;
        }

        public IsoVector RotateNeg60About(IsoVector other)
        {
            var x = this.x;
            this.x = x + this.y - other.y;
            this.y = other.x + other.y - x;
            return this;
        }

        public IsoVector Rotate120(int m, int n)
        {
            var x = this.x;
            this.x = m - x - this.y;
            this.y = n + x;
            return this;
        }

        public IsoVector RotateNeg120(int m, int n)
        {
            var x = this.x;
            this.x = this.y - n;
            this.y = m + n - x - this.y;
            return this;
        }

        public Vector3 ToCartesianOrigin(IsoVector origin, float isoGridSize)
        {
            var point = Vector3.zero;
            point.x = origin.x + 2 * this.x * isoGridSize + this.y * isoGridSize;
            point.y = origin.y + Mathf.Sqrt(3) * this.y * isoGridSize;
            return point;
        }

        public static IsoVector Zero()
        {
            return new IsoVector(0, 0);
        }
    }
}