package org.csstudio.sds.ui.internal.editor.newproperties;

import java.util.Collections;
import java.util.List;

import org.csstudio.sds.internal.model.DoubleArrayProperty;
import org.csstudio.sds.model.AbstractWidgetModel;
import org.eclipse.jface.fieldassist.IContentProposal;

/**
 * Section implementation for {@link DoubleArrayProperty}.
 * 
 * @author Sven Wende
 *
 */
public final class DoubleArraySection extends AbstractTextSection<DoubleArrayProperty, double[]> {

	public DoubleArraySection(String propertyId) {
		super(propertyId);
	}

	/**
	 *{@inheritDoc}
	 */
	@Override
	protected  double[] getConvertedValue(String text) {
		// String#split in Java returns a single-element array (instead of an
		// empty array) if the input was the empty string. But we must return
		// an empty array in that case!
		if (text.equals("")) {
			return new double[0];
		}
		
		
		String value = text.replaceAll(",", ";");
		String[] strings = value.split(";");
		
		double[] result = new double[strings.length]; 
		for (int i=0;i<strings.length;i++) {
			try {
			Double d = Double.valueOf(strings[i].trim());
			if (d.isNaN()) {
				result[i] = 0;
			} else {
				result[i] = d.doubleValue();
			}
			} catch (Throwable t) {
				t.printStackTrace();
			}
		}
		return result;
	}

	/**
	 *{@inheritDoc}
	 */
	@Override
	protected void doRefreshControls(DoubleArrayProperty widgetProperty) {
		if (widgetProperty != null && widgetProperty.getPropertyValue() != null
				&& !widgetProperty.getPropertyValue().toString().equals(getTextControl().getText())) {
			double[] propertyValue = widgetProperty.getPropertyValue();
			getTextControl().setText(getStringRepresentation(propertyValue));
		}
	}
	
	private String getStringRepresentation(double[] array) {
		StringBuffer buffer = new StringBuffer();
		if (array.length>0) {
			buffer.append(array[0]);
			for (int i=1;i<array.length;i++) {
				buffer.append("; ");
				buffer.append(array[i]);
			}
		}
		return buffer.toString();	
	}

	/**
	 *{@inheritDoc}
	 */
	@Override
	protected List<IContentProposal> getContentProposals(DoubleArrayProperty property, AbstractWidgetModel selectedWidget,
			List<AbstractWidgetModel> selectedWidgets) {
		return Collections.emptyList();
	}

}