///////////////////////////////////////////////////////////////////////////////
// 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.model;

import edu.cmu.tetrad.graph.*;
import edu.cmu.tetrad.search.utils.GraphSearchUtils;
import edu.cmu.tetrad.session.DoNotAddOldModel;
import edu.cmu.tetrad.util.Parameters;
import edu.cmu.tetrad.util.TetradLogger;

import java.rmi.MarshalledObject;
import java.util.ArrayList;
import java.util.List;

/**
 * @author Tyler Gibson
 */
public class ExtractStructureModelWrapper extends GraphWrapper implements DoNotAddOldModel {
    static final long serialVersionUID = 23L;


    public ExtractStructureModelWrapper(GraphSource source, Parameters parameters) {
        this(source.getGraph());
    }


    public ExtractStructureModelWrapper(Graph graph) {
        super(new EdgeListGraph());

        List<Node> latents = new ArrayList<>();

        for (Node node : graph.getNodes()) {
            if (node.getNodeType() == NodeType.LATENT) {
                latents.add(node);
            }
        }

        Graph graph2 = graph.subgraph(latents);

        // Make a deep clone so the layout below doesn't affect the original graph.
        Graph graph3;

        try {
            graph3 = (Graph) new MarshalledObject(graph2).get();
        } catch (Exception e) {
            e.printStackTrace();
            throw new RuntimeException(e);
        }

        LayoutUtil.fruchtermanReingoldLayout(graph3);
        setGraph(graph3);

        TetradLogger.getInstance().log("info", "\nGenerating CPDAG from DAG.");
    }

    public static ExtractStructureModelWrapper serializableInstance() {
        return new ExtractStructureModelWrapper(EdgeListGraph.serializableInstance());
    }

    //======================== Private Method ======================//


    private static Graph getCPDAG(Dag dag) {
        return GraphSearchUtils.cpdagFromDag(dag);
    }

    @Override
    public boolean allowRandomGraph() {
        return false;
    }
}




