using UnityEngine;

[System.Serializable]
public struct HexCoordinates
{
    public int X { get; private set; }

    public int Z { get; private set; }

    public HexCoordinates(int x, int z)
    {
        X = x;
        Z = z;
    }

    public static HexCoordinates FromOffsetCoordinates(int x, int z)
    {
        return new HexCoordinates(x - z / 2, z);
    }

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

    public string ToStringOnSeparateLines()
    {
        return X.ToString() + "\n" + Z.ToString();
    }

    public static HexCoordinates FromPosition(Vector3 position)
    {
        float x = position.x / (HexMetrics.innerRadius * 2f);
        float y = -x;
        float offset = position.z / (HexMetrics.outerRadius * 3f);
        x -= offset;
        y -= offset;
        int iX = Mathf.RoundToInt(x);
        int iY = Mathf.RoundToInt(y);
        int iZ = Mathf.RoundToInt(-x - y);

        if (iX + iY + iZ != 0) {
            float dX = Mathf.Abs(x - iX);
            float dY = Mathf.Abs(y - iY);
            float dZ = Mathf.Abs(-x -y - iZ);

            if (dX > dY && dX > dZ) {
                iX = -iY - iZ;
            }
            else if (dZ > dY) {
                iZ = -iX - iY;
            }
        }

        return new HexCoordinates(iX, iZ);
    }
}