/*
-----------------------------------------------------------------------
--                CHESS Live/Batch Validator plugin                  --
--                                                                   --
--                    Copyright (C) 2011-2012                        --
--                 University of Padova, ITALY                       --
--                                                                   --
-- Author: 											                 --
--                                                                   --
-- 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-v20.html                         --
-----------------------------------------------------------------------
 */
package org.polarsys.chess.validator.constraints;

import org.eclipse.core.runtime.IStatus;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.uml2.uml.Comment;
import org.eclipse.uml2.uml.Property;
import org.eclipse.uml2.uml.Stereotype;
import org.eclipse.emf.validation.AbstractModelConstraint;
import org.eclipse.emf.validation.IValidationContext;
import org.polarsys.chess.chessmlprofile.Predictability.RTComponentModel.CHRtSpecification;
import org.polarsys.chess.chessmlprofile.util.Constants;

/**
 * The Class EFVRT_04.
 * This class implements the following constraint (invoked by the EMF validation framework):
 * In CH_RtSpecification if occKind= Periodic, then phase (if present in occKind) and relativePriority attributes must both be >= 0
 */
public class EFVRT_04 extends AbstractModelConstraint {	

	/* (non-Javadoc)
	 * @see org.eclipse.emf.validation.AbstractModelConstraint#validate(org.eclipse.emf.validation.IValidationContext)
	 */
	@Override
	public IStatus validate(IValidationContext ctx) {
		EObject eObject = ctx.getTarget();
		Comment c = (Comment)eObject;

		IStatus success = ctx.createSuccessStatus();
		IStatus failure = ctx.createFailureStatus(
				c.getAnnotatedElements(),  // name of element annotated by this comment {0}
				c.getNearestPackage().getName()// package owning this {1}
				);  

		Stereotype chrtSpecStereo = c.getAppliedStereotype(Constants.CHRT_SPECIFICATION);	
		if(chrtSpecStereo == null) {
			return success;
		}

		CHRtSpecification chRtSpec = (CHRtSpecification)c.getStereotypeApplication(chrtSpecStereo);
		// 20160531 if partWithPort is null, the validation must still be performed 
//		Property partWithPort = chRtSpec.getPartWithPort();
//		if (partWithPort == null) {
//			return success;
//		}

		StringParser parser = new StringParser();

		String occValue = chRtSpec.getOccKind();
		String relPriority =  chRtSpec.getRelativePriority();

		if(occValue == null || !(occValue.contains(Constants.CHRTSPEC_OCCKIND_PERIODIC))) {
			return success;
		}

		double phase = parser.getValuePattern(occValue, Constants.CHRTSPEC_OCCKIND_PERIODIC_PHASE);
		if(phase != -1) 
			if(!(phase >= 0)) 
				return failure;

		if(relPriority != null) {
			double relPriorityVal = parser.getDoubleValue(relPriority);
			if(!(relPriorityVal > 0))
				return failure;
		}

		return success;
	}
}