/**
 * 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.person;

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.RelationshipType;
import org.openmrs.api.APIException;
import org.openmrs.api.PersonService;
import org.openmrs.api.context.Context;
import org.openmrs.validator.RelationshipTypeValidator;
import org.openmrs.web.WebConstants;
import org.springframework.beans.propertyeditors.CustomNumberEditor;
import org.springframework.dao.DataIntegrityViolationException;
import org.springframework.util.StringUtils;
import org.springframework.validation.BindException;
import org.springframework.validation.ValidationUtils;
import org.springframework.web.bind.ServletRequestDataBinder;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.SimpleFormController;
import org.springframework.web.servlet.view.RedirectView;

public class RelationshipTypeFormController extends SimpleFormController {

	/** Logger for this class and subclasses */
	protected final Log log = LogFactory.getLog(getClass());

	/**
	 * Allows for Integers to be used as values in input tags. Normally, only strings and lists are
	 * expected
	 *
	 * @see org.springframework.web.servlet.mvc.BaseCommandController#initBinder(javax.servlet.http.HttpServletRequest,
	 *      org.springframework.web.bind.ServletRequestDataBinder)
	 */
	protected void initBinder(HttpServletRequest request, ServletRequestDataBinder binder) throws Exception {
		super.initBinder(request, binder);
		//NumberFormat nf = NumberFormat.getInstance(new Locale("en_US"));
		binder.registerCustomEditor(java.lang.Integer.class, new CustomNumberEditor(java.lang.Integer.class, true));
	}

	/**
	 * @see org.springframework.web.servlet.mvc.SimpleFormController#processFormSubmission(javax.servlet.http.HttpServletRequest,
	 *      javax.servlet.http.HttpServletResponse, java.lang.Object,
	 *      org.springframework.validation.BindException)
	 */
	@Override
	protected ModelAndView processFormSubmission(HttpServletRequest request, HttpServletResponse response, Object command,
	        BindException errors) throws Exception {

		RelationshipType type = (RelationshipType) command;

		new RelationshipTypeValidator().validate(type, errors);

			ValidationUtils.rejectIfEmptyOrWhitespace(errors, "aIsToB", "error.aIsToB");
			ValidationUtils.rejectIfEmptyOrWhitespace(errors, "bIsToA", "error.bIsToA");

		if (!StringUtils.hasText(type.getDescription()))
			errors.rejectValue("description", "error.required", new Object[] { Context.getMessageSourceService().getMessage(
			    "general.description") }, null);

		return super.processFormSubmission(request, response, type, errors);
	}

	/**
	 * 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()) {
			RelationshipType relationshipType = (RelationshipType) obj;
			PersonService ps = Context.getPersonService();

			//to save the relationship type
			if (request.getParameter("save") != null) {
				ps.saveRelationshipType(relationshipType);
				view = getSuccessView();
				httpSession.setAttribute(WebConstants.OPENMRS_MSG_ATTR, "RelationshipType.saved");
			}

			// if the user is retiring out the relationshipType
			else if (request.getParameter("retire") != null) {
				String retireReason = request.getParameter("retireReason");
				if (relationshipType.getRelationshipTypeId() != null && !(StringUtils.hasText(retireReason))) {
					errors.reject("retireReason", "general.retiredReason.empty");
					return showForm(request, response, errors);
				}

				ps.retireRelationshipType(relationshipType, retireReason);
				httpSession.setAttribute(WebConstants.OPENMRS_MSG_ATTR, "RelationshipType.retiredSuccessfully");

				view = getSuccessView();
			}

			// if the user is purging the relationshipType
			else if (request.getParameter("purge") != null) {
				try {
					ps.purgeRelationshipType(relationshipType);
					httpSession.setAttribute(WebConstants.OPENMRS_MSG_ATTR, "RelationshipType.purgedSuccessfully");
					view = getSuccessView();
				}
				catch (DataIntegrityViolationException e) {
					httpSession.setAttribute(WebConstants.OPENMRS_ERROR_ATTR, "error.object.inuse.cannot.purge");
					return showForm(request, response, errors);
				}
				catch (APIException e) {
					httpSession.setAttribute(WebConstants.OPENMRS_ERROR_ATTR, "error.general: " + e.getLocalizedMessage());
					return showForm(request, response, errors);
				}
			}
			// if the user unretiring relationship type
			else if (request.getParameter("unretire") != null) {
				ps.unretireRelationshipType(relationshipType);
				httpSession.setAttribute(WebConstants.OPENMRS_MSG_ATTR, "RelationshipType.unretiredSuccessfully");
				view = getSuccessView();
			}

		}

		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 {

		RelationshipType identifierType = null;

		if (Context.isAuthenticated()) {
			PersonService ps = Context.getPersonService();
			String relationshipTypeId = request.getParameter("relationshipTypeId");
			if (relationshipTypeId != null)
				identifierType = ps.getRelationshipType(Integer.valueOf(relationshipTypeId));
		}

		if (identifierType == null)
			identifierType = new RelationshipType();

		return identifierType;
	}

}