/*
 *  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.operator.nio;

import java.util.logging.Level;

import javax.swing.SwingUtilities;

import com.rapidminer.example.ExampleSet;
import com.rapidminer.gui.RapidMinerGUI;
import com.rapidminer.gui.actions.OpenAction;
import com.rapidminer.gui.tools.ProgressThread;
import com.rapidminer.gui.tools.SwingTools;
import com.rapidminer.gui.tools.dialogs.ConfirmDialog;
import com.rapidminer.gui.tools.dialogs.wizards.AbstractWizard;
import com.rapidminer.gui.tools.dialogs.wizards.AbstractWizard.WizardStepDirection;
import com.rapidminer.gui.tools.dialogs.wizards.dataimport.RepositoryLocationSelectionWizardStep;
import com.rapidminer.operator.OperatorException;
import com.rapidminer.operator.nio.model.DataResultSet;
import com.rapidminer.operator.nio.model.WizardState;
import com.rapidminer.repository.Entry;
import com.rapidminer.repository.IOObjectEntry;
import com.rapidminer.repository.RepositoryException;
import com.rapidminer.repository.RepositoryLocation;
import com.rapidminer.repository.RepositoryManager;
import com.rapidminer.repository.local.SimpleIOObjectEntry;
import com.rapidminer.tools.I18N;
import com.rapidminer.tools.LogService;

/**
 * 
 * @author Simon Fischer
 *
 */
public final class StoreDataWizardStep extends RepositoryLocationSelectionWizardStep {

	private WizardState state;

	public StoreDataWizardStep(AbstractWizard parent, WizardState state, String preselectedLocation, boolean onlyWriteableRepositories) {
		super(parent, preselectedLocation, true, onlyWriteableRepositories);
		this.state = state;
	}

	public StoreDataWizardStep(AbstractWizard parent, WizardState state, String preselectedLocation) {
		this(parent, state, preselectedLocation, false);
	}

	@Override
	protected boolean performLeavingAction(WizardStepDirection direction) {
		if (direction == WizardStepDirection.FINISH) {
			String repositoryLocationPath = getRepositoryLocation();
			if (repositoryLocationPath == null) {
				return false;
			}
			final RepositoryLocation location;
			try {
				location = new RepositoryLocation(repositoryLocationPath);
				Entry entry = location.locateEntry();
				if (entry != null) {
					if (entry instanceof SimpleIOObjectEntry) {
						// could overwrite, ask for permission
						if (SwingTools.showConfirmDialog("overwrite", ConfirmDialog.YES_NO_OPTION, entry.getLocation()) == ConfirmDialog.NO_OPTION) {
							return false;
						}
					} else {
						// cannot overwrite, inform user
						SwingTools.showSimpleErrorMessage("cannot_save_data_no_dataentry", "", entry.getName());
						return false;
					}
				}
			} catch (Exception e) {
				SwingTools.showSimpleErrorMessage("malformed_rep_location", e, repositoryLocationPath);
				return false;
			}
			state.setSelectedLocation(location);
			new ProgressThread("importing_data", true) {

				@Override
				public void run() {
					DataResultSet resultSet = null;
					try {
						if (state.getTranslator() != null) {
							state.getTranslator().close();
						}
						resultSet = state.getDataResultSetFactory().makeDataResultSet(null);
						state.getTranslator().clearErrors();
						final ExampleSet exampleSet = state.readNow(resultSet, false, getProgressListener());

						try {
							RepositoryManager.getInstance(null).store(exampleSet, location, null);
							SwingUtilities.invokeLater(new Runnable() {

								@Override
								public void run() {
									// Select repository entry
									if (RapidMinerGUI.getMainFrame() != null) {
										RapidMinerGUI.getMainFrame().getRepositoryBrowser().expandToRepositoryLocation(location);
										// Switch to result 
										try {
											Entry entry = location.locateEntry();
											if (entry != null && entry instanceof IOObjectEntry) {
												OpenAction.showAsResult((IOObjectEntry) entry);
											}
										} catch (RepositoryException e) {
											LogService.getRoot().log(Level.WARNING, "Can not open result", e);
										}
									}
								}
							});
						} catch (RepositoryException ex) {
							SwingTools.showSimpleErrorMessage("cannot_store_obj_at_location", ex, location);
							return;
						}
					} catch (Exception e) {
						SwingTools.showSimpleErrorMessage("cannot_store_obj_at_location", e, location);
					} finally {
						if (resultSet != null) {
							try {
								resultSet.close();
							} catch (OperatorException e) {
								LogService.getRoot().log(Level.WARNING,
										I18N.getMessage(LogService.getRoot().getResourceBundle(),
												"com.rapidminer.operator.nio.StoreDataWizardStep.closing_result_set_error",
												e),
										e);
							}
						}
						state.getDataResultSetFactory().close();
						getProgressListener().complete();
					}
				}
			}.start();
			return true;
		} else {
			return super.performLeavingAction(direction);
		}
	}
}