/**
 * License Agreement.
 *
 *  JBoss RichFaces - Ajax4jsf Component Library
 *
 * Copyright (C) 2007  Exadel, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License version 2.1 as published by the Free Software Foundation.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
 */

package org.richfaces.component;

import javax.faces.application.FacesMessage;
import javax.faces.component.UIInput;
import javax.faces.context.FacesContext;

import org.richfaces.component.util.MessageUtil;

/**
 * @author Nick - mailto:nbelaevski@exadel.com
 * created 20.02.2007
 * 
 */
public abstract class UIRangedNumberInput extends UIInput {

    public abstract String getMaxValue();
    public abstract void setMaxValue(String value);

    public abstract String getMinValue();
    public abstract void setMinValue(String value);
    
    public abstract boolean isDisabled();
	public abstract void setDisabled(boolean disabled);
	
	public void decode(FacesContext arg0) {
		if (this.isDisabled())
			return;
		super.decode(arg0);
	}
    
    protected void validateValue(FacesContext context, Object newValue) {
    	if (isValid() && !isEmpty(newValue)) {
    	    	String label = MessageUtil.getLabel(context, this).toString();
    	    	
    	    	Double minValue = null, maxValue = null, value = null;
            	try {
        		minValue = convert(getMinValue());
        		maxValue = convert(getMaxValue());
        		
        		//convert value and check if it is in range
        		value = convert(newValue);
            	} catch ( Exception e ) {
            	    	setValid(false);
        		FacesMessage mess = new FacesMessage(label + ": " + e.getLocalizedMessage());
        		mess.setSeverity(FacesMessage.SEVERITY_ERROR);
        		context.addMessage(this.getClientId(context), mess);
            	}

    		if (value != null) {
        		if (null == minValue || null == maxValue) {
            			setValid(false);
        			FacesMessage mess = new FacesMessage(label + ": conversation error, maxValue or minValue is null!");
        			mess.setSeverity(FacesMessage.SEVERITY_ERROR);
        			context.addMessage(this.getClientId(context), mess);
        		} else if (minValue.doubleValue() > value.doubleValue()) {
        			setValid(false);
        			FacesMessage mess = new FacesMessage(label + ": input value is less than minimal value!");
        			mess.setSeverity(FacesMessage.SEVERITY_ERROR);
        			context.addMessage(this.getClientId(context), mess);
        		} else if (maxValue.doubleValue() < value.doubleValue()) {
        		    	setValid(false);
        			FacesMessage mess = new FacesMessage(label + ": input value is more than maximum value!");
        			mess.setSeverity(FacesMessage.SEVERITY_ERROR);
        			context.addMessage(this.getClientId(context), mess);
        		}
    		} else {
            		setValid(false);
        		FacesMessage mess = new FacesMessage(label + ": input value can't be null!");
        		mess.setSeverity(FacesMessage.SEVERITY_ERROR);
        		context.addMessage(this.getClientId(context), mess);
    		}
    	}

    	super.validateValue(context, newValue);
    }
    
    private Double convert(Object object) {
    	if (object == null) {
    		return null;
    	}
    	return new Double(object.toString());
    }
    
    public static boolean isEmpty(Object newValue) {
		if (newValue == null) {
			return true;
		}

		if (newValue instanceof String) {
			return ((String) newValue).length() == 0;
		}

		return false;
    }

}
