// Copyright (C) 2011 Associated Universities, Inc. Washington DC, USA.
// 
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 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
// General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
// 
// Correspondence concerning GBT software should be addressed as follows:
//       GBT Operations
//       National Radio Astronomy Observatory
//       P. O. Box 2
//       Green Bank, WV 24944-0002 USA

package edu.nrao.dss.client.forms;

import java.util.ArrayList;

import com.extjs.gxt.ui.client.Style.HorizontalAlignment;
import com.extjs.gxt.ui.client.event.BaseEvent;
import com.extjs.gxt.ui.client.event.ButtonEvent;
import com.extjs.gxt.ui.client.event.Events;
import com.extjs.gxt.ui.client.event.FormEvent;
import com.extjs.gxt.ui.client.event.Listener;
import com.extjs.gxt.ui.client.event.SelectionListener;
import com.extjs.gxt.ui.client.widget.HorizontalPanel;
import com.extjs.gxt.ui.client.widget.button.Button;
import com.extjs.gxt.ui.client.widget.form.Field;
import com.extjs.gxt.ui.client.widget.form.FormButtonBinding;
import com.extjs.gxt.ui.client.widget.form.FormPanel;
import com.extjs.gxt.ui.client.widget.form.Radio;
import com.extjs.gxt.ui.client.widget.form.RadioGroup;
import com.extjs.gxt.ui.client.widget.layout.TableData;
import com.gargoylesoftware.htmlunit.javascript.host.Event;
import com.google.gwt.core.client.GWT;

import edu.nrao.dss.client.data.InputData;
import edu.nrao.dss.client.data.ResultsData;

public abstract class BasicForm extends FormPanel {
	public ArrayList<BasicForm> observers = new ArrayList<BasicForm>();
	FormButtonBinding saveBinding = new FormButtonBinding(this);

	public BasicForm(String title) {
		setFrame(true);
		setCollapsible(true);
		setAction("/calculator/set_terms/");
		setMethod(FormPanel.Method.POST);
		
		// setting layout
		setLabelWidth(200);
		setLabelAlign(LabelAlign.RIGHT);

		setHeading(title);
		initLayout();

		HorizontalPanel buttons = new HorizontalPanel();
		buttons.setTableWidth("100%");
		buttons.setSpacing(10);
		
		
		add(buttons);

		layout(true);
	}

	public abstract void validate();

	public abstract void initLayout();

	public abstract void notify(String name, String value);

	public void addObserver(BasicForm form) {
		observers.add(form);
	}

	public void notifyAllForms() {
		for (BasicForm form : observers) {
			for (Field fe : this.getFields()) {
				String name = fe.getName();
				
				if (name != null) {
					// Radio Groups need special handling
					if (name.equals("frame") || name.equals("units")) {
						Radio choice = ((RadioGroup) fe).getValue();
						if (choice != null) {
							form.notify(name, choice.getValueAttribute());
						}
					} else {
						form.notify(name, fe.getRawValue());
					}
				}
			}
		}
	}
	
	SelectionListener<ButtonEvent> updateTerms = new SelectionListener<ButtonEvent>() {
		public void componentSelected(ButtonEvent ce) {
			submit();
			ResultsData.loadResults();
			InputData.loadInput();
		}
	};
	
	public void submit() {
		super.submit();
		for(Field<?> field : getFields()){
			field.getElement().getParentElement().removeClassName("x-grid3-dirty-cell");
		}
	}

}