/*******************************************************************************
 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
 * in Industry THTH ry.
 * 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-v10.html
 *
 * Contributors:
 *     VTT Technical Research Centre of Finland - initial API and implementation
 *******************************************************************************/
package org.simantics.db.tests.api.support.virtualGraphSupport;

import java.util.Arrays;
import java.util.HashSet;
import java.util.UUID;

import org.junit.Test;
import org.simantics.databoard.Bindings;
import org.simantics.db.Resource;
import org.simantics.db.Session;
import org.simantics.db.VirtualGraph;
import org.simantics.db.WriteGraph;
import org.simantics.db.common.request.WriteRequest;
import org.simantics.db.exception.DatabaseException;
import org.simantics.db.service.VirtualGraphSupport;
import org.simantics.db.testing.base.TestCleanDb;
import org.simantics.layer0.Layer0;

public class VirtualGraphTest2 extends TestCleanDb {
	
	private Error exception; 
	
	@Test
	public void test() throws DatabaseException {
		
		Session session = getSession();
        VirtualGraphSupport support = session.getService(VirtualGraphSupport.class);
        final VirtualGraph virtual = support.getMemoryPersistent(UUID.randomUUID().toString());
		
		session.syncRequest(new WriteRequest() {

			@Override
			public void perform(WriteGraph g) throws DatabaseException {

                Layer0 b = Layer0.getInstance(g);

			    final HashSet<String> strings = new HashSet<String>();

                for(Resource r : g.getObjects(g.getRootLibrary() , b.ConsistsOf)) {
                    String name = g.getPossibleRelatedValue(r, b.HasName); 
                    strings.add(name);
                }
                
			    g.syncRequest(new WriteRequest(virtual) {

					@Override
					public void perform(WriteGraph g) throws DatabaseException {
						
						Layer0 b = Layer0.getInstance(g);
						for(int i=0;i<10;i++) {
						    Resource r = g.newResource();
						    String name = "Virtual" + i;
						    g.claimLiteral(r, b.HasName, name, Bindings.STRING);
						    strings.add(name);
						    g.claim(g.getRootLibrary(), b.ConsistsOf, r);
						}
						
					}
					
				});
				
                for(Resource r : g.getObjects(g.getRootLibrary() , b.ConsistsOf)) {
                    String name = g.getPossibleRelatedValue(r, b.HasName);
                    if (DEBUG)
                    	System.out.println("found " + name);
                    boolean success = strings.remove(name);
                    if(!success) {
                        exception = new AssertionError("encountered unknown string " + name);
                        throw exception;
                    }
                }

				if(!strings.isEmpty()) {
					exception = new AssertionError("some strings were left over " + Arrays.toString(strings.toArray()));
					throw exception;
				}

			}
			
		});
		
		if(exception != null) {
			fail("Write transaction threw and exception (" + exception.getMessage() + ") which was not passed through ");
		}
		
	}

}