/**
 * The contents of this file are subject to the OpenMRS Public License
 * Version 1.0 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://license.openmrs.org
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
 * License for the specific language governing rights and limitations
 * under the License.
 *
 * Copyright (C) OpenMRS, LLC.  All Rights Reserved.
 */
package org.openmrs.web.controller.form;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.openmrs.FieldType;
import org.openmrs.api.FormService;
import org.openmrs.api.context.Context;
import org.openmrs.web.WebConstants;
import org.springframework.validation.BindException;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.SimpleFormController;
import org.springframework.web.servlet.view.RedirectView;

public class FieldTypeFormController extends SimpleFormController {
	
	/** Logger for this class and subclasses */
	protected final Log log = LogFactory.getLog(getClass());
	
	/**
	 * The onSubmit function receives the form/command object that was modified by the input form
	 * and saves it to the db
	 * 
	 * @see org.springframework.web.servlet.mvc.SimpleFormController#onSubmit(javax.servlet.http.HttpServletRequest,
	 *      javax.servlet.http.HttpServletResponse, java.lang.Object,
	 *      org.springframework.validation.BindException)
	 */
	protected ModelAndView onSubmit(HttpServletRequest request, HttpServletResponse response, Object obj,
	        BindException errors) throws Exception {
		
		HttpSession httpSession = request.getSession();
		
		String view = getFormView();
		
		if (Context.isAuthenticated()) {
			FieldType fieldType = (FieldType) obj;
			Context.getFormService().saveFieldType(fieldType);
			view = getSuccessView();
			httpSession.setAttribute(WebConstants.OPENMRS_MSG_ATTR, "FieldType.saved");
		}
		
		return new ModelAndView(new RedirectView(view));
	}
	
	/**
	 * This is called prior to displaying a form for the first time. It tells Spring the
	 * form/command object to load into the request
	 * 
	 * @see org.springframework.web.servlet.mvc.AbstractFormController#formBackingObject(javax.servlet.http.HttpServletRequest)
	 */
	protected Object formBackingObject(HttpServletRequest request) throws ServletException {
		
		FieldType fieldType = null;
		
		if (Context.isAuthenticated()) {
			FormService rs = Context.getFormService();
			String fieldTypeId = request.getParameter("fieldTypeId");
			if (fieldTypeId != null)
				fieldType = rs.getFieldType(Integer.valueOf(fieldTypeId));
		}
		
		if (fieldType == null)
			fieldType = new FieldType();
		
		return fieldType;
	}
	
}