/*******************************************************************************
 * Copyright (c) 2007, 2011 Association for Decentralized Information Management in
 * Industry THTH ry.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     VTT Technical Research Centre of Finland - initial API and implementation
 *******************************************************************************/
package org.simantics.charts.editor;

import java.text.DecimalFormat;
import java.text.Format;
import java.text.ParseException;

import org.eclipse.jface.dialogs.IInputValidator;
import org.simantics.utils.format.TimeFormat;

/**
 * @author Toni Kalajainen
 */
public class TimeInputValidator implements IInputValidator {

	public static final TimeInputValidator INSTANCE = new TimeInputValidator(-Double.MAX_VALUE);

	public Format decimalFormat = new DecimalFormat("0");

	public Format timeFormat = new TimeFormat(100, 0);

	double minValue;

	public TimeInputValidator(double minValue) {
		this.minValue = minValue;
	}

	public Double parse(String text) {
		if (text==null) return null;
		text = text.trim();
		if (text.equals("")) return null;

		try {
			return (Double) timeFormat.parseObject(text);
		} catch (ParseException e) {
		}

		try {
			Number n = (Number) decimalFormat.parseObject(text);
			if (n instanceof Double) return (Double) n;
			return n.doubleValue();
		} catch (ParseException e) {
		}
		
		return null;
	}

	@Override
	public String isValid(String text) {
		if (text==null) return "Null";
		text = text.trim();
		if (text.equals("")) return null;

		try {
			Double d = (Double) timeFormat.parseObject(text);
			
			if (d != null && d.doubleValue()<minValue)
				return "Value must be at least "+minValue+" seconds.";
			return null;
		} catch (ParseException e) {
		}
		
		try {
			Number n = (Number) decimalFormat.parseObject(text);
			if (n != null && n.doubleValue()<minValue)
				return "Value must be at least "+minValue+" seconds.";
			return null;
		} catch (ParseException e) {
			return e.toString();
		}
	}
		
}