/* The mode transition table for configuring an SCR Model.

 Copyright (c) 2014 The Regents of the University of California.
 All rights reserved.
 Permission is hereby granted, without written agreement and without
 license or royalty fees, to use, copy, modify, and distribute this
 software and its documentation for any purpose, provided that the above
 copyright notice and the following two paragraphs appear in all copies
 of this software.

 IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY
 FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
 ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
 THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF
 SUCH DAMAGE.

 THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
 INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE
 PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE UNIVERSITY OF
 CALIFORNIA HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES,
 ENHANCEMENTS, OR MODIFICATIONS.
 PT_COPYRIGHT_VERSION_2
 COPYRIGHTENDKEY

 */

package ptolemy.vergil.scr;

import java.util.ArrayList;
import java.util.HashSet;
import java.util.Set;
import java.util.Vector;

import javax.swing.table.AbstractTableModel;

import ptolemy.domains.modal.kernel.FSMActor;
import ptolemy.domains.modal.kernel.State;
import ptolemy.domains.modal.kernel.Transition;
import ptolemy.kernel.CompositeEntity;
import ptolemy.kernel.util.IllegalActionException;
import ptolemy.kernel.util.NameDuplicationException;

/**
The mode transition table for configuring an SCR Model.
@author Patricia Derler
@version $Id: ModeTransitionTableModel.java 70402 2014-10-23 00:52:20Z cxh $
@since Ptolemy II 10.0
@Pt.ProposedRating Red (pd)
@Pt.AcceptedRating Red (pd)
 */
@SuppressWarnings("serial")
public class ModeTransitionTableModel extends AbstractTableModel {

    /** Construct the mode transition table for configuring an SCR Model.
     *  @param model The model.
     */
    public ModeTransitionTableModel(FSMActor model) {
        _model = model;
        _tableContentIsInvalid = true;
        _initializeTableContent();
    }

    /** Add a row. */
    public void addRow() {
        if (_tableContent == null) {
            _tableContent = new ArrayList<String>();
        }
        Vector<String> vector = new Vector<String>();
        vector.add("");
        vector.add("");
        vector.add("");
        _tableContent.addAll(vector);
        _tableContentIsInvalid = false;
        this.fireTableDataChanged();
    }

    /** Delete a row. */
    public void deleteRow(int selectedRow) {
        System.out.println(selectedRow);
        _tableContent.remove(selectedRow * 3);
        _tableContent.remove(selectedRow * 3);
        _tableContent.remove(selectedRow * 3);
        _tableContentIsInvalid = false;
        this.fireTableDataChanged();
    }

    /** Get the column count.
     *  @return  In this base class, always return 3.
     */
    @Override
    public int getColumnCount() {
        return 3;
    }

    /** Get the column name.
     *  @param column The column number.
     *  @return the name of the column.
     */
    @Override
    public String getColumnName(int column) {
        switch (column) {
        case 0:
            return "Source Mode";
        case 1:
            return "Events";
        case 2:
            return "Destination Mode";
        default:
            return "";
        }

    }

    /** Return the row count.
     *  @return the row count
     */
    @Override
    public int getRowCount() {
        _initializeTableContent();
        return _tableContent.size() / getColumnCount();
    }

    /** Get the value at a particular cell.
     *  @param arg0 The row.
     *  @param arg1 The column.
     *  @return the value at that cell.
     */
    @Override
    public Object getValueAt(int arg0, int arg1) {
        _initializeTableContent();
        int index = arg0 * getColumnCount() + arg1;
        if (index < 0) {
            return null;
        } else {
            return _tableContent.get(index);
        }
    }

    /** Return true, indicating that the cell is editable.
     *  @param rowIndex The rowIndex, which is ignored in this base
     *  class.
     *  @param columnIndex The columnIndex, which is ignored in this base
     *  class.
     *  @return Always return true.
     */
    @Override
    public boolean isCellEditable(int rowIndex, int columnIndex) {
        return true;
    }

    /** Save the model.
     *  @exception IllegalActionException  If thrown while saving the model.
     *  @exception NameDuplicationException  If thrown while saving the model.
     */
    public void saveModel() throws IllegalActionException,
            NameDuplicationException {
        Set<State> states = new HashSet<State>();

        for (int i = 0; i < _tableContent.size(); i = i + 3) {
            if (_tableContent.get(i).equals("")
                    || _tableContent.get(i + 1).equals("")
                    || _tableContent.get(i + 2).equals("")) {
                throw new IllegalActionException(_model,
                        "Table cell cannot be empty.");
            }
            String sourceState = (String) _tableContent.get(i);
            String transitionGuard = (String) _tableContent.get(i + 1);
            String destinationState = (String) _tableContent.get(i + 2);

            State source = (State) _model.getEntity(sourceState);
            State destination = (State) _model.getEntity(destinationState);
            if (source == null) {
                source = new State(_model, sourceState);
            }
            if (destination == null) {
                destination = new State(_model, destinationState);
            }
            states.add(source);
            states.add(destination);

            Transition transition = null;
            for (Object object : source.outgoingPort.linkedRelationList()) {
                if (destination.incomingPort.linkedRelationList().contains(
                        object)) {
                    transition = (Transition) object;
                }
            }
            if (transition == null) {
                transition = new Transition(_model,
                        ((CompositeEntity) _model).uniqueName("transition"));
                source.outgoingPort.link(transition);
                destination.incomingPort.link(transition);
            }

            transition.guardExpression.setExpression(transitionGuard);
        }

        // remove all states that are not in the table anymore.
        for (Object entity : _model.entityList()) {
            if (entity instanceof State && !states.contains(entity)) {
                ((State) entity).setContainer(null);
            }
        }
    }

    /** Set that value of a cell.
     *  @param value The value to be set.
     *  @param row The index of the row.
     *  @param column The index of the column.
     */
    @Override
    public void setValueAt(Object value, int row, int column) {
        _tableContent.set(row * 3 + column, value);
        fireTableCellUpdated(row, column);
    }

    ///////////////////////////////////////////////////////////////////
    ////                         private methods                   ////

    private void _initializeTableContent() {
        if (_tableContent == null || _tableContentIsInvalid) {
            _tableContent = new ArrayList();
            for (Object entity : _model.relationList()) {
                Transition transition = ((Transition) entity);
                //                                if (transition.sourceState() != transition
                //                                                .destinationState()) {
                _tableContent.add(transition.sourceState().getName());
                _tableContent.add(transition.guardExpression.getExpression());
                _tableContent.add(transition.destinationState().getName());
                //                                }
            }
            _tableContentIsInvalid = false;
        }
    }

    ///////////////////////////////////////////////////////////////////
    ////                         private variables                 ////

    private ArrayList _tableContent;
    private boolean _tableContentIsInvalid;
    private FSMActor _model;
}