package org.litesoft.sandbox.multimodule.anywhere.die;

public class Identifier
{
    private Orientation mOrientation;
    private int mFace; // 1-6
    private int mNorthSide; // 1-6

    Identifier( Orientation pOrientation, int pFace, int pNorthSide )
    {
        mOrientation = pOrientation;
        mFace = pFace;
        mNorthSide = pNorthSide;
        if ( (mFace == mNorthSide) || (mNorthSide == getOppositeSide( mFace )) )
        {
            throw new IllegalArgumentException( "Invalid Identifier: " + this );
        }
    }

    public Orientation getOrientation()
    {
        return mOrientation;
    }

    public int getFace()
    {
        return mFace;
    }

    public int getNorthSide()
    {
        return mNorthSide;
    }

    @Override
    public String toString()
    {
        return "" + mFace + mOrientation + mNorthSide;
    }

    public static Identifier fromString( String pToString )
    {
        if ( pToString != null )
        {
            if ( (pToString = pToString.trim()).length() != 0 )
            {
                try
                {
                    return new Identifier( Orientation.valueOf( pToString.substring( 1, 2 ) ), //
                                           parseSide( pToString.substring( 0, 1 ) ), //
                                           parseSide( pToString.substring( 2, 3 ) ) );
                }
                catch ( RuntimeException e )
                {
                    throw new IllegalArgumentException( "Not a Die Identifier '" + pToString + "'.", e );
                }
            }
        }
        return null;
    }

    static int parseSide( String pSideNumber )
    {
        int zSideNumber = Integer.parseInt( pSideNumber );
        if ( (1 <= zSideNumber) && (zSideNumber <= 6) )
        {
            return zSideNumber;
        }
        throw new IllegalArgumentException( "Not a valid Die Side value: " + pSideNumber );
    }

    static int getOppositeSide( int pSideNumber )
    {
        return 7 - pSideNumber;
    }
}