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/*******************************************************************************
 * Copyright 2015 Defense Health Agency (DHA)
 *
 * If your use of this software does not include any GPLv2 components:
 * 	Licensed under the Apache License, Version 2.0 (the "License");
 * 	you may not use this file except in compliance with the License.
 * 	You may obtain a copy of the License at
 *
 * 	  http://www.apache.org/licenses/LICENSE-2.0
 *
 * 	Unless required by applicable law or agreed to in writing, software
 * 	distributed under the License is distributed on an "AS IS" BASIS,
 * 	WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * 	See the License for the specific language governing permissions and
 * 	limitations under the License.
 * ----------------------------------------------------------------------------
 * If your use of this software includes any GPLv2 components:
 * 	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.
 *******************************************************************************/
package prerna.ui.components;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.openrdf.repository.RepositoryConnection;

import prerna.engine.api.IDatabaseEngine;
import prerna.engine.impl.rdf.InMemorySesameEngine;
import prerna.engine.impl.rdf.SesameJenaConstructStatement;
import prerna.engine.impl.rdf.SesameJenaSelectCheater;
import prerna.om.GraphDataModel;

/**
 * This class is responsible for handling various components related to the engine for the OWL file.
 * It loads concepts from the engine into the specified sesame engine.
 */
public class GraphOWLHelper {

	static final Logger logger = LogManager.getLogger(GraphOWLHelper.class.getName());

	/**
	 * Loads the hierarchy of concepts (subjects).
	 * @param rc 		Repository connection- interface for updating data in and performing queries on a Sesame repository.
	 * @param subjects 	String
	 * @param objects 	String
	 * @param ps 		Graph playsheet.
	 * @throws Exception 
	 */
	public static void loadConceptHierarchy(RepositoryConnection rc, String subjects, String objects, GraphDataModel ps) throws Exception
	{
		IDatabaseEngine sesameEngine = new InMemorySesameEngine();
		((InMemorySesameEngine)sesameEngine).setRepositoryConnection(rc);
		String conceptHierarchyForSubject = "SELECT ?Subject ?Predicate ?Object WHERE " +
			"{" +
			"{?Subject  ?Object}" +
			"{?Subject ?Predicate ?Object}" + 
			"} BINDINGS ?Subject { " + subjects + objects + " } " +
			"";
		
		System.err.println("Predicates are " + conceptHierarchyForSubject);

		SesameJenaSelectCheater sjsc = new SesameJenaSelectCheater();
		sjsc.setEngine(sesameEngine);
		sjsc.setQuery(conceptHierarchyForSubject);
		sjsc.execute();
		
		while(sjsc.hasNext())
		{
			// read the subject predicate object
			// add it to the in memory jena model
			// get the properties
			// add it to the in memory jena model
			SesameJenaConstructStatement st = sjsc.next();
			PropertySpecData psd = ps.getPredicateData();
			psd.addConcept(st.getObject()+"", st.getSubject()+"");

		}
	}


	/**
	 * Loads the hierarchy of relations (predicates).
	 * @param rc Repository connection- interface for updating data in and performing queries on a Sesame repository.
	 * @param predicates 	Type of predicates.
	 * @param ps GraphPlaySheet
	 * @throws Exception 
	 */
	public static void loadRelationHierarchy(RepositoryConnection rc, String predicates, GraphDataModel ps) throws Exception
	{
		IDatabaseEngine sesameEngine = new InMemorySesameEngine();
		((InMemorySesameEngine)sesameEngine).setRepositoryConnection(rc);
		// same concept as the subject, but only for relations
		String relationHierarchy = "SELECT ?Subject ?Predicate ?Object WHERE " +
			"{" +
			"{?Subject ?Predicate ?Object}" + 
			"{?Subject  ?Object}" +
			"} BINDINGS ?Subject { " + predicates + " } " +
			"";// relation hierarchy		
		
		SesameJenaSelectCheater sjsc = new SesameJenaSelectCheater();
		sjsc.setEngine(sesameEngine);
		sjsc.setQuery(relationHierarchy);
		sjsc.execute();

		while(sjsc.hasNext())
		{
			// read the subject predicate object
			// add it to the in memory jena model
			// get the properties
			// add it to the in memory jena model			
			SesameJenaConstructStatement st = sjsc.next();
			PropertySpecData psd = ps.getPredicateData();
			psd.addPredicate2(st.getObject()+"", st.getSubject());
			// I have to have some logic which will add the type name 
			// basically the object is the main type
			// subject is the subtype
		}
	}	

	/**
	 * Loads the hierarchy of properties.
	 * @param rc Repository connection- interface for updating data in and performing queries on a Sesame repository.
	 * @param predicates 		Predicates.
	 * @param containsRelation 	Type of relation.
	 * @param ps GraphPlaySheet
	 * @throws Exception 
	 */
	public static void loadPropertyHierarchy(RepositoryConnection rc, String predicates, String containsRelation, GraphDataModel ps) throws Exception
	{
		IDatabaseEngine sesameEngine = new InMemorySesameEngine();
		((InMemorySesameEngine)sesameEngine).setRepositoryConnection(rc);
		// same concept as the subject, but only for relations
		String relationHierarchy = "SELECT ?Subject ?Predicate ?Object WHERE " +
			"{" +
			"{?Subject ?Predicate ?Object}" + 
			"{?Subject  " + containsRelation + " }" +
			"} BINDINGS ?Subject { " + predicates + " } " +
			"";// relation hierarchy
		

		SesameJenaSelectCheater sjsc = new SesameJenaSelectCheater();
		sjsc.setEngine(sesameEngine);
		sjsc.setQuery(relationHierarchy);
		sjsc.execute();

		while(sjsc.hasNext())
		{
			// read the subject predicate object
			// add it to the in memory jena model
			// get the properties
			// add it to the in memory jena model

			SesameJenaConstructStatement st = sjsc.next();
			PropertySpecData psd = ps.getPredicateData();
			psd.addPredicate2(st.getObject()+"", st.getSubject());
			// I have to have some logic which will add the type name 
			// basically the object is the main type
			// subject is the subtype
		}
	}

}