package com.mojang.blaze3d.opengl;

import com.mojang.blaze3d.GpuFormat;
import com.mojang.blaze3d.opengl.FrameBufferCache.CacheKey;
import com.mojang.blaze3d.textures.GpuTexture;
import java.util.ArrayList;
import java.util.List;

public class GlTexture extends GpuTexture implements FrameBufferAttachment {
	private static final int EMPTY = -1;
	protected final int id;
	private final FrameBufferCache frameBufferCache;
	private final List<CacheKey> fboKeys = new ArrayList();
	protected boolean closed;
	private int views;

	protected GlTexture(
		@GpuTexture.Usage final int usage,
		final String label,
		final GpuFormat format,
		final int width,
		final int height,
		final int depthOrLayers,
		final int mipLevels,
		final int id,
		final FrameBufferCache frameBufferCache
	) {
		super(usage, label, format, width, height, depthOrLayers, mipLevels);
		this.id = id;
		this.frameBufferCache = frameBufferCache;
	}

	@Override
	public void close() {
		if (!this.closed) {
			this.closed = true;
			if (this.views == 0) {
				this.destroyImmediately();
			}
		}
	}

	private void destroyImmediately() {
		while (!this.fboKeys.isEmpty()) {
			this.frameBufferCache.destroyFbo((CacheKey)this.fboKeys.getLast());
		}

		GlStateManager._deleteTexture(this.id);
	}

	@Override
	public boolean isClosed() {
		return this.closed;
	}

	@Override
	public int glId() {
		return this.id;
	}

	@Override
	public int fboMipLevel() {
		return 0;
	}

	@Override
	public void addAssociatedFbo(final CacheKey fboKey) {
		this.fboKeys.add(fboKey);
	}

	@Override
	public void removeAssociatedFbo(final CacheKey fboKey) {
		this.fboKeys.remove(fboKey);
	}

	public void addViews() {
		this.views++;
	}

	public void removeViews() {
		this.views--;
		if (this.closed && this.views == 0) {
			this.destroyImmediately();
		}
	}
}