/*
 *  RapidMiner
 *
 *  Copyright (C) 2001-2014 by RapidMiner and the contributors
 *
 *  Complete list of developers available at our web site:
 *
 *       http://rapidminer.com
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as published by
 *  the Free Software Foundation, either version 3 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 Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see http://www.gnu.org/licenses/.
 */
package com.rapidminer.gui.processeditor.results;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;

import javax.swing.Action;
import javax.swing.JPanel;
import javax.swing.JPopupMenu;
import javax.swing.SwingUtilities;

import com.rapidminer.Process;
import com.rapidminer.gui.RapidMinerGUI;
import com.rapidminer.gui.tools.ResourceAction;
import com.rapidminer.operator.IOObject;
import com.rapidminer.tools.ParameterService;

/** Summarizes the results recent process executions.
 * 
 * @author Simon Fischer
 *
 */
public class ResultOverview extends JPanel {

    private static final int HISTORY_LENGTH = 50;

    private static final long serialVersionUID = 1L;

    private final LinkedList<ProcessExecutionResultOverview> processOverviews = new LinkedList<ProcessExecutionResultOverview>();

    protected final Action CLEAR_HISTORY_ACTION = new ResourceAction("resulthistory.clear_history") {
        private static final long serialVersionUID = 1L;
        @Override
        public void actionPerformed(ActionEvent e) {
            Iterator<ProcessExecutionResultOverview> i = processOverviews.iterator();
            while (i.hasNext()) {
                ProcessExecutionResultOverview o = i.next();
                i.remove();
                ResultOverview.this.remove(o);
            }
            ResultOverview.this.repaint();
        }
    };

    public ResultOverview() {
        setLayout(null);
        setBackground(Color.WHITE);
        addMouseListener(new MouseAdapter() {
            @Override
            public void mouseClicked(MouseEvent e) {
                showContextMenu(e);
            }
            @Override
            public void mousePressed(MouseEvent e) {
                showContextMenu(e);
            }
            @Override
            public void mouseReleased(MouseEvent e) {
                showContextMenu(e);
            }
            private void showContextMenu(MouseEvent e) {
                if (e.isPopupTrigger()) {
                    JPopupMenu m = new JPopupMenu();
                    m.add(CLEAR_HISTORY_ACTION);
                    m.show(ResultOverview.this, e.getX(), e.getY());
                }
            }
        });
    }

    @Override
    public void doLayout() {
        int y = 0;
        for (ProcessExecutionResultOverview overview : processOverviews) {
            overview.recomputeLayout();
            overview.setBounds(0, y, (int)overview.getPreferredSize().getWidth(), (int)overview.getPreferredSize().getHeight());
            y += overview.getPreferredSize().getHeight();
        }
        if (y != getHeight()) {
            Dimension total = new Dimension(getWidth(), y);
            setPreferredSize(total);
            setMaximumSize(total);
            setMinimumSize(total);
        }
        getParent().doLayout();
    }

    public void addResults(Process process, List<IOObject> results, String statusMessage) {
        if (process.getProcessState() != Process.PROCESS_STATE_PAUSED ||
                "true".equals(ParameterService.getParameterValue(RapidMinerGUI.PROPERTY_ADD_BREAKPOINT_RESULTS_TO_HISTORY))) {
            final ProcessExecutionResultOverview newOverview = new ProcessExecutionResultOverview(this, process, results, statusMessage);
            // Swing calls need to be done in EDT to avoid freezing up of the Result Overview
            SwingUtilities.invokeLater(new Runnable() {

            	@Override
            	public void run() {
            		processOverviews.add(newOverview);
            		add(newOverview);

            		while (processOverviews.size() > HISTORY_LENGTH) {
            			ProcessExecutionResultOverview first = processOverviews.removeFirst();
            			remove(first);
            		}
            	}

            });
        }
    }

    public void removeProcessOverview(ProcessExecutionResultOverview processExecutionResultOverview) {
        remove(processExecutionResultOverview);
        processOverviews.remove(processExecutionResultOverview);
        doLayout();
        repaint();
    }
}