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package mds.data.descriptor_r;

import java.nio.ByteBuffer;
import mds.data.DTYPE;
import mds.data.descriptor.Descriptor;
import mds.data.descriptor.Descriptor_R;
import mds.data.descriptor_a.Float32Array;
import mds.data.descriptor_s.Uint8;

public final class Dim extends Descriptor_R
{
	public Dim(final ByteBuffer b)
	{
		super(b);
	}

	public Dim(final Descriptor... arguments)
	{
		super(DTYPE.DIMENSION, null, arguments);
	}

	public Dim(final Descriptor window, final Descriptor axis)
	{
		super(DTYPE.DIMENSION, null, window, axis);
	}

	@Override
	public StringBuilder decompile(final int prec, final StringBuilder pout, final int mode)
	{
		return Descriptor_R.decompile_build(this, prec, pout, mode);
	}

	public final Descriptor getAxis()
	{ return this.getDescriptor(1); }

	@Override
	public final Descriptor getData_(final DTYPE... omits)
	{
		float begin = Float.NEGATIVE_INFINITY, ending = Float.POSITIVE_INFINITY, origin = 0, delta = 1;
		if (this.getAxis() instanceof Range)
		{
			if (!Descriptor.isMissing(((Range) (this.getAxis())).getDelta()))
				delta = ((Range) (this.getAxis())).getDelta().toFloat();
			if (!Descriptor.isMissing(((Range) (this.getAxis())).getBegin()))
				begin = ((Range) (this.getAxis())).getBegin().toFloat();
			if (!Descriptor.isMissing(((Range) (this.getAxis())).getEnding()))
				ending = ((Range) (this.getAxis())).getEnding().toFloat();
		}
		if (this.getWindow() instanceof Window)
		{
			if (!Descriptor.isMissing(((Window) (this.getWindow())).getValueAtIdx0()))
				origin = ((Window) (this.getWindow())).getValueAtIdx0().toFloat();
			if (!Descriptor.isMissing(((Window) (this.getWindow())).getStartingIdx()))
				begin = Math.max(begin, origin + delta * ((Window) (this.getWindow())).getStartingIdx().toFloat());
			if (!Descriptor.isMissing(((Window) (this.getWindow())).getEndingIdx()))
				ending = Math.min(ending, origin + delta * ((Window) (this.getWindow())).getEndingIdx().toFloat());
		}
		if (begin == Float.NEGATIVE_INFINITY || ending == Float.POSITIVE_INFINITY)
			return new Uint8(1);
		final int elements = (int) ((ending - begin) / delta);
		final ByteBuffer buf = ByteBuffer.allocateDirect(elements * Float.SIZE).order(Descriptor.BYTEORDER);
		for (int i = 0; i < elements; i++)
			buf.putFloat(begin + i * delta);
		return new Float32Array(DTYPE.FLOAT, buf, new int[]
		{ elements });
	}

	@Override
	public final Dim getLocal_(final FLAG local)
	{
		final FLAG mylocal = new FLAG();
		final Descriptor win = this.getWindow().getLocal(mylocal);
		final Descriptor axis = this.getAxis().getLocal(mylocal);
		if (FLAG.and(local, mylocal.flag))
			return this;
		return (Dim) new Dim(win, axis).setLocal();
	}

	public final Descriptor getWindow()
	{ return this.getDescriptor(0); }
}