/*
 * Copyright 2012 by A-SIT, Secure Information Technology Center Austria
 *
 * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by
 * the European Commission - subsequent versions of the EUPL (the "Licence");
 * You may not use this work except in compliance with the Licence.
 * You may obtain a copy of the Licence at:
 * http://joinup.ec.europa.eu/software/page/eupl
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the Licence is distributed on an "AS IS" basis,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the Licence for the specific language governing permissions and
 * limitations under the Licence.
 */
package at.asit.pdfover.gui.workflow.states;

//Imports
import java.io.File;

import org.eclipse.swt.SWT;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import at.asit.pdfover.gui.components.DataSourceSelectComposite;
import at.asit.pdfover.gui.workflow.Workflow;
import at.asit.pdfover.gui.workflow.WorkflowState;

/**
 * Selects the data source for the signature process.
 */
public class DataSourceSelectionState extends WorkflowState {

	/**
	 * SFL4J Logger instance
	 **/
	private static final Logger log = LoggerFactory
			.getLogger(DataSourceSelectionState.class);

	private DataSourceSelectComposite selectionComposite = null;

	private DataSourceSelectComposite getSelectionComposite(Workflow workflow) {
		if (this.selectionComposite == null) {
			this.selectionComposite = new DataSourceSelectComposite(
					workflow.getComposite(), SWT.RESIZE, workflow);
		}

		return this.selectionComposite;
	}

	@Override
	public void update(Workflow workflow) {

		if (workflow.getDataSource() == null) {
			DataSourceSelectComposite selection = this
					.getSelectionComposite(workflow);

			workflow.setTopControl(selection);
			selection.layout();

			File source = selection.getSelected();
			if(source != null) {
				workflow.setDataSource(source);
			}

			if (workflow.getDataSource() == null) {
				// Not selected yet
				this.setNextState(this);
				return;
			} 
		}
		log.debug("Got Datasource: " + workflow.getDataSource().getAbsolutePath());
		this.setNextState(new PositioningState());
	}
	
	@Override
	public String toString()  {
		return "DataSourceSelectionState";
	}
}