/*
 *  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.operator.nio;

import java.awt.BorderLayout;

import javax.swing.JComponent;
import javax.swing.JLabel;
import javax.swing.JPanel;

import com.rapidminer.gui.tools.dialogs.wizards.AbstractWizard.WizardStepDirection;
import com.rapidminer.gui.tools.dialogs.wizards.WizardStep;
import com.rapidminer.operator.nio.ExcelWorkbookPane.ExcelWorkbookSelection;
import com.rapidminer.operator.nio.model.ExcelResultSetConfiguration;

/**
 * This step allows to select a sheet of an excel workbook to import it.
 * 
 * It handles the handshake with the generic following {@link AnnotationDeclarationWizardStep}.
 * 
 * @author Sebastian Land
 */
class ExcelSheetSelectionWizardStep extends WizardStep {
	
	private ExcelResultSetConfiguration configuration;
	private final ExcelWorkbookPane workbookSelectionPanel;
	
	private final JLabel errorLabel = new JLabel("");

	public ExcelSheetSelectionWizardStep(ExcelResultSetConfiguration configuration) {
		super("importwizard.excel_data_selection");
		
		this.configuration = configuration;
		this.workbookSelectionPanel = new ExcelWorkbookPane(this, configuration);
	}

	@Override
	protected boolean canGoBack() {
		return true;
	}

	@Override
	protected boolean canProceed() {
		return true;
	}

	@Override
	protected boolean performEnteringAction(WizardStepDirection direction) {
		if (direction == WizardStepDirection.FORWARD) {
			workbookSelectionPanel.loadWorkbook();
		}
		return true;
	}

	@Override
	protected boolean performLeavingAction(WizardStepDirection direction) {
		if (direction == WizardStepDirection.FORWARD) {
			ExcelWorkbookSelection selection = workbookSelectionPanel.getSelection();	
			configuration.setSheet(selection.getSheetIndex());
			configuration.setColumnOffset(selection.getColumnIndexStart());
			configuration.setColumnLast(selection.getColumnIndexEnd());
			configuration.setRowOffset(selection.getRowIndexStart());
			configuration.setRowLast(selection.getRowIndexEnd());			
		} else {
			configuration.closeWorkbook();				
		}
		
		return true;
	}

	@Override
	protected JComponent getComponent() {
		JPanel panel = new JPanel(new BorderLayout());
		panel.add(workbookSelectionPanel, BorderLayout.CENTER);
		panel.add(errorLabel, BorderLayout.SOUTH);
		return panel;
	}
}