///////////////////////////////////////////////////////////////////////////////
// For information as to what this class does, see the Javadoc, below.       //
// Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,       //
// 2007, 2008, 2009, 2010, 2014, 2015, 2022 by Peter Spirtes, Richard        //
// Scheines, Joseph Ramsey, and Clark Glymour.                               //
//                                                                           //
// This program is free software; you can redistribute it and/or modify      //
// it under the terms of the GNU General Public License as published by      //
// the Free Software Foundation; either version 2 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 General Public License for more details.                              //
//                                                                           //
// You should have received a copy of the GNU 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  USA //
///////////////////////////////////////////////////////////////////////////////

package edu.cmu.tetradapp.editor;

import edu.cmu.tetrad.graph.Graph;
import edu.cmu.tetrad.search.utils.GraphSearchUtils;
import edu.cmu.tetradapp.workbench.GraphWorkbench;

import javax.swing.*;

/**
 * Colors a graph using the PAG coloring. Optionally checks to make sure it's  legal PAG.
 *
 * @author josephramsey
 */
public class PagColorer extends JCheckBoxMenuItem {

    /**
     * Creates a new copy subsession action for the given desktop and
     * clipboard.
     */
    public PagColorer(GraphWorkbench workbench) {
        super("Add/Remove PAG Coloring");

        if (workbench == null) {
            throw new NullPointerException("Desktop must not be null.");
        }

        final GraphWorkbench _workbench = workbench;

        Graph graph = workbench.getGraph();

        _workbench.setDoPagColoring(workbench.isDoPagColoring());
        setSelected(workbench.isDoPagColoring());

        addItemListener(e -> {
            if (!isSelected()) {
                workbench.setDoPagColoring(false);
            } else {
                int ret = JOptionPane.showConfirmDialog(workbench,
                        breakDown("Would you like to verify that this is a legal PAG?", 60),
                        "Legal PAG check", JOptionPane.YES_NO_OPTION, JOptionPane.WARNING_MESSAGE);
                if (ret == JOptionPane.YES_NO_OPTION) {
                    GraphSearchUtils.LegalPagRet legalPag = GraphSearchUtils.isLegalPag(graph);
                    String reason = breakDown(legalPag.getReason(), 60);

                    if (!legalPag.isLegalPag()) {
                        JOptionPane.showMessageDialog(workbench,
                                "This is not a legal PAG--one reason is as follows:" +
                                        "\n\n" + reason + ".",
                                "Legal PAG check",
                                JOptionPane.WARNING_MESSAGE);
                    } else {
                        JOptionPane.showMessageDialog(workbench, reason);
                    }
                }

                _workbench.setDoPagColoring(true);
            }
        });

    }

    private String breakDown(String reason, int maxColumns) {
        StringBuilder buf1 = new StringBuilder();
        StringBuilder buf2 = new StringBuilder();

        String[] tokens = reason.split(" ");

        for (String token : tokens) {
            if (buf1.length() + token.length() > maxColumns) {
                buf2.append(buf1);
                buf2.append("\n");
                buf1 = new StringBuilder();
                buf1.append(token);
            } else {
                buf1.append(" ").append(token);
            }
        }

        if (buf1.length() > 0) {
            buf2.append(buf1);
        }

        return buf2.toString();
    }
}



