/*******************************************************************************
 * Copyright (C) 2007 The University of Manchester
 *
 *  Modifications to the initial code base are copyright of their
 *  respective authors, or their employers as appropriate.
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public License
 *  as published by the Free Software Foundation; either version 2.1 of
 *  the License, or (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful, but
 *  WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 ******************************************************************************/
package org.apache.taverna.workbench.views.results.processor;

import static java.awt.Color.RED;
import static org.apache.taverna.workbench.views.results.processor.ProcessorResultTreeNode.ProcessorResultTreeNodeState.RESULT_LIST;
import static org.apache.taverna.workbench.views.results.processor.ProcessorResultTreeNode.ProcessorResultTreeNodeState.RESULT_REFERENCE;
import static org.apache.taverna.workbench.views.results.processor.ProcessorResultTreeNode.ProcessorResultTreeNodeState.RESULT_TOP;
import static org.apache.taverna.databundle.DataBundles.isError;

import java.awt.Component;
import java.nio.file.Path;

import javax.swing.JLabel;
import javax.swing.JTree;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.TreeNode;

/**
 * @author alanrw
 */
@SuppressWarnings("serial")
public class ProcessorResultCellRenderer extends DefaultTreeCellRenderer {
	@Override
	public Component getTreeCellRendererComponent(JTree tree, Object value,
			boolean selected, boolean expanded, boolean leaf, int row,
			boolean hasFocus) {
		Component result = super.getTreeCellRendererComponent(tree, value,
				selected, expanded, leaf, row, hasFocus);
		if (value instanceof ProcessorResultTreeNode) {
			ProcessorResultTreeNode value2 = (ProcessorResultTreeNode) value;
			String text = "";
			ProcessorResultTreeNode parent = (ProcessorResultTreeNode) value2
					.getParent();
			if (value2.getState() == RESULT_LIST) {
				if (value2.getChildCount() == 0)
					text = "Empty list";
				else {
					text = "List";
					if (parent.getState() != RESULT_TOP)
						text += " " + (parent.getIndex(value2) + 1);
					text += " with " + value2.getValueCount() + " value";
					if (value2.getValueCount() != 1)
						text += "s";
					if (value2.getSublistCount() > 0)
						text += " in " + value2.getSublistCount() + " sublists";
				}
			} else if (value2.getState() == RESULT_REFERENCE)
				text = "Value " + (parent.getIndex(value2) + 1);

			((JLabel) result).setText(text);
			if (containsError(value2))
				result.setForeground(RED);
		}
		return result;
	}

	private static boolean containsError(TreeNode node) {
		boolean result = false;
		if (node instanceof ProcessorResultTreeNode) {
			ProcessorResultTreeNode rtn = (ProcessorResultTreeNode) node;
			Path reference = rtn.getReference();
			if (reference != null && isError(reference))
				result = true;
		}
		int childCount = node.getChildCount();
		for (int i = 0; (i < childCount) && !result; i++)
			result = containsError(node.getChildAt(i));
		return result;
	}
}