/*
 *  RapidMiner
 *
 *  Copyright (C) 2001-2011 by Rapid-I and the contributors
 *
 *  Complete list of developers available at our web site:
 *
 *       http://rapid-i.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.actions;

import java.awt.event.ActionEvent;
import java.io.IOException;

import com.rapidminer.Process;
import com.rapidminer.ProcessLocation;
import com.rapidminer.RepositoryProcessLocation;
import com.rapidminer.gui.RapidMinerGUI;
import com.rapidminer.gui.tools.ProgressThread;
import com.rapidminer.gui.tools.ResourceAction;
import com.rapidminer.gui.tools.SwingTools;
import com.rapidminer.operator.ResultObject;
import com.rapidminer.repository.Entry;
import com.rapidminer.repository.IOObjectEntry;
import com.rapidminer.repository.MalformedRepositoryLocationException;
import com.rapidminer.repository.ProcessEntry;
import com.rapidminer.repository.RepositoryException;
import com.rapidminer.repository.RepositoryLocation;
import com.rapidminer.repository.gui.RepositoryLocationChooser;
import com.rapidminer.tools.XMLException;


/**
 * Start the corresponding action.
 * 
 * @author Ingo Mierswa
 */
public class OpenAction extends ResourceAction {

	private static final long serialVersionUID = -323403851840397447L;
	
	public OpenAction() {
		super("open");	
		
		setCondition(EDIT_IN_PROGRESS, DONT_CARE);
	}

	public void actionPerformed(ActionEvent e) {
		open();
	}
		
	/** Loads the data held by the given entry (in the background) and opens it as a result. */
	public static void showAsResult(final IOObjectEntry data) {
		final ProgressThread downloadProgressThread = new ProgressThread("download_from_repository") {
			public void run() {
				try {
					ResultObject result = (ResultObject)data.retrieveData(this.getProgressListener());
					result.setSource(data.getLocation().toString());
					RapidMinerGUI.getMainFrame().getResultDisplay().showResult(result);
				} catch (Exception e1) {
					SwingTools.showSimpleErrorMessage("cannot_fetch_data_from_repository", e1);
				}
			}
		};
		downloadProgressThread.start();
	}

	public static void open() {
		if (RapidMinerGUI.getMainFrame().close()) {
			String locationString = RepositoryLocationChooser.selectLocation(null, null, RapidMinerGUI.getMainFrame(), true, false);			
			if (locationString != null) {
				try {
					RepositoryLocation location = new RepositoryLocation(locationString);
					Entry entry = location.locateEntry();
					if (entry instanceof ProcessEntry) {
						open(new RepositoryProcessLocation(location), true);
					} else if (entry instanceof IOObjectEntry) {
						showAsResult((IOObjectEntry) entry);
					} else {
						SwingTools.showVerySimpleErrorMessage("no_data_or_process");	
					}
				} catch (MalformedRepositoryLocationException e) {
					SwingTools.showSimpleErrorMessage("while_loading", e, locationString, e.getMessage());
				} catch (RepositoryException e) {
					SwingTools.showSimpleErrorMessage("while_loading", e, locationString, e.getMessage());
				}
			}			
		}
	}

	
	public static void open(final ProcessLocation processLocation, final boolean showInfo) {
		RapidMinerGUI.getMainFrame().stopProcess();
		ProgressThread openProgressThread = new ProgressThread("open_file") {
			public void run() {
				getProgressListener().setTotal(100);
				getProgressListener().setCompleted(10);
				try {				
					Process process = processLocation.load(getProgressListener());
					process.setProcessLocation(processLocation);
					RapidMinerGUI.getMainFrame().setOpenedProcess(process, showInfo, processLocation.toString());					
				} catch (XMLException ex) {
					try {
						RapidMinerGUI.getMainFrame().handleBrokenProxessXML(processLocation, processLocation.getRawXML(), ex);
					} catch (IOException e) {
						SwingTools.showSimpleErrorMessage("while_loading", e, processLocation, e.getMessage());
						return;
					}					
				} catch (Exception e) {
					SwingTools.showSimpleErrorMessage("while_loading", e, processLocation, e.getMessage());
					return;
				} finally {
					getProgressListener().complete();
				}
			}
		};
		openProgressThread.start();
	}

	public static void open(String openLocation, boolean showInfo) {
		try {
			final RepositoryLocation location = new RepositoryLocation(openLocation);
			Entry entry = location.locateEntry();
			if (entry instanceof ProcessEntry) {
				open(new RepositoryProcessLocation(location), false);
			} else if (entry instanceof IOObjectEntry){
				OpenAction.showAsResult((IOObjectEntry) entry);
			} else {
				throw new RepositoryException("Cannot open entries of type "+entry.getType()+".");	
			}
		} catch (Exception e) {
			SwingTools.showSimpleErrorMessage("while_loading", e, openLocation, e.getMessage());
		}		
	}
}