/*
 * Copyright (C) 2007, 2008 Quadduc <quadduc@gmail.com>
 * Copyright (C) 2007 IsmAvatar <IsmAvatar@gmail.com>
 * Copyright (C) 2013 Robert B. Colton
 *
 * This file is part of LateralGM.
 * LateralGM is free software and comes with ABSOLUTELY NO WARRANTY.
 * See LICENSE for details.
 */

package org.lateralgm.components;

import static org.lateralgm.main.Util.deRef;

import java.awt.Color;
import java.awt.Component;
import java.awt.Image;
import java.awt.image.BufferedImage;

import javax.swing.BorderFactory;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JLabel;
import javax.swing.JTree;
import javax.swing.tree.DefaultTreeCellRenderer;

import org.lateralgm.components.impl.DefaultNode;
import org.lateralgm.components.impl.ResNode;
import org.lateralgm.main.LGM;
import org.lateralgm.main.Prefs;
import org.lateralgm.resources.Resource;
import org.lateralgm.resources.ResourceReference;

public class GmTreeGraphics extends DefaultTreeCellRenderer
	{
	private static final long serialVersionUID = 1L;

	private static ImageIcon blankIcon;
	private DefaultNode last;

	private Color nonSelectColor;

	public GmTreeGraphics()
		{
		super();
		setOpenIcon(LGM.getIconForKey("GmTreeGraphics.GROUP_OPEN")); //$NON-NLS-1$
		setClosedIcon(LGM.getIconForKey("GmTreeGraphics.GROUP")); //$NON-NLS-1$
		setLeafIcon(getClosedIcon());
		setBorder(BorderFactory.createEmptyBorder(1,0,0,0));
		}

	@Override
	public Component getTreeCellRendererComponent(JTree tree, Object val, boolean sel, boolean exp,
			boolean leaf, int row, boolean focus)
		{
		// this is a patch for the DarkEye Synthetica look and feel which for some reason
		// overrides its own UI property in its paint method, likely a bug on their part
		// same fix applied in LGM.java for the Search Tree renderer
		setTextNonSelectionColor(nonSelectColor);

		last = (DefaultNode) val;

		Component com = super.getTreeCellRendererComponent(tree,val,sel,exp,leaf,row,focus);

		// Bold primary nodes
		if (val instanceof ResNode && com instanceof JLabel) {
			ResNode rn = (ResNode) val;
			JLabel label = (JLabel) com;
			if (rn.status == ResNode.STATUS_PRIMARY && Prefs.boldPrimaryNodes) {
				label.setText("<html><b>" + getText() + "</b></html>");
			}
		}

		return com;
		}

	@Override
	public void updateUI() {
		super.updateUI();
		nonSelectColor = this.getTextNonSelectionColor();
	}

	public static ImageIcon getBlankIcon()
		{
		if (blankIcon == null)
			blankIcon = new ImageIcon(new BufferedImage(16,16,BufferedImage.TYPE_INT_ARGB));
		return blankIcon;
		}

	public static Icon getScaledIcon(Image i)
		{
		int w = i.getWidth(null);
		int h = i.getHeight(null);

		int m = Math.min(w,h); //Needs clipping
		if (m > 16) i = i.getScaledInstance(w * 16 / m,h * 16 / m,BufferedImage.SCALE_SMOOTH);
		// Crop and/or center the image
		Image i2 = new BufferedImage(16,16,BufferedImage.TYPE_INT_ARGB);
		int x = 0;
		int y = 0;
		if (w < 16) x = 8 - w / 2;
		if (h < 16) y = 8 - h / 2;
		i2.getGraphics().drawImage(i,x,y,null);
		i = i2;

		return new ImageIcon(i);
		}

	public static Icon getResourceIcon(ResourceReference<?> r)
		{
		Resource<?,?> res = deRef(r);
		if (res != null && res instanceof Resource.Viewable)
			{
			BufferedImage bi = ((Resource.Viewable) res).getDisplayImage();
			if (bi != null) return getScaledIcon(bi);
			}
		return getBlankIcon();
		}

	public Icon getLeafIcon()
	{
		if (last != null) {
			Icon icon = last.getLeafIcon();
			if (icon != null) return icon;
		}
		return getClosedIcon();
	}

	public Icon getClosedIcon()
	{
		Icon ico = getIconisedGroup();
		if (ico != null) return ico;
		return super.getClosedIcon();
	}

	public Icon getOpenIcon()
	{
		Icon ico = getIconisedGroup();
		if (ico != null) return ico;
		return super.getOpenIcon();
	}

	private Icon getIconisedGroup()
	{
		if (Prefs.iconizeGroup && last != null)
			return last.getIconisedGroup();

		return null;
	}

	public Icon getNodeIcon(Object val, boolean exp, boolean leaf)
		{
		last = (DefaultNode) val;
		if (leaf) {
			Icon icon = getLeafIcon();
			if (icon != null) return icon;
		}
		if (exp) return getOpenIcon();
		return getClosedIcon();
		}
	}