/*******************************************************************************
 * 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.client;

import java.io.File;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

import org.junit.Test;
import org.simantics.databoard.Bindings;
import org.simantics.db.ReadGraph;
import org.simantics.db.Resource;
import org.simantics.db.Session;
import org.simantics.db.WriteGraph;
import org.simantics.db.common.request.ReadRequest;
import org.simantics.db.common.request.WriteRequest;
import org.simantics.db.exception.DatabaseException;
import org.simantics.db.exception.ValidationException;
import org.simantics.db.service.LifecycleSupport;
import org.simantics.db.testing.annotation.Fails;
import org.simantics.db.testing.common.TestBase;
import org.simantics.db.testing.common.Tests;
import org.simantics.db.testing.impl.Configuration;
import org.simantics.layer0.Layer0;

public class ConnectionTest6 extends TestBase {
    private static final boolean DEBUG = Configuration.get().debug;
	private static final  String USERNAME = Configuration.get().username;
	private static final String PASSWORD = Configuration.get().password;
	private static final int RECONNECT_COUNT = Configuration.get().connectionReconnectCount;
    private static final int SAVE_COUNT = Configuration.get().connectionSaveCount;
	private static final boolean SKIP = Configuration.get().skipServerCreation;
	private static final File WS_DIR = new File(Configuration.get().workspace);
	private Session session = null;
	private final String random = "ConnectionTest6" + TestBase.getRandomString();
    private final String libraryName = "Library" + random;
	private final String newInstanceSuffix = "InstanceName" + random;
	private final String WORK_DIR = "connection6";
    @Test
    @Fails
	public void test6() throws Exception {
	    if (SKIP) {
	    	System.out.println("This test is not valid for remote server.");
	    	return;
	    }
        for (int i=0; i<RECONNECT_COUNT; ++i) {
            connectionTest();
        }
	}
    void connectionTest() throws Exception {
        initTest();
        List<String> names = new ArrayList<String>();
        for (int i=0; i<SAVE_COUNT; ++i) {
             String name = saveTest(i+1);
             names.add(name);
        }
        checkTest(names);
    }
    void initTest() throws Exception {
        session = Tests.getTestHandler().getSession();
        try {
            session.syncRequest(new WriteRequest() {
                @Override
                public void perform(WriteGraph g) throws DatabaseException {
                    Layer0 b = Layer0.getInstance(g);
                    Resource newResource = g.newResource();
                    g.claim(newResource, b.InstanceOf, null, b.Library);
                    g.claimLiteral(newResource, b.HasName, libraryName);
                    g.claim(g.getRootLibrary(), b.ConsistsOf, newResource);
                }
            });
            session.syncRequest(new ReadRequest() {
                @Override
                public void run(ReadGraph g) throws DatabaseException {
                    Layer0 b = Layer0.getInstance(g);
                    Collection<Resource> resources = g.getObjects(g.getRootLibrary(), b.ConsistsOf);
                    Resource newResource = null;
                    for (Resource r : resources) {
                        String value = g.getPossibleRelatedValue(r, b.HasName);
                        if (null != value && value.equals(libraryName)) {
                            newResource = r;
                            break;
                        }
                    }
                    if (newResource == null) {
                        throw new ValidationException("Could not find created resource");
                    }
                }
            });
            LifecycleSupport ls = session.getService(LifecycleSupport.class);
            ls.close();
        } catch (DatabaseException e) {
            throw e;
        } finally {
            Tests.closeSession(session);
        }
	}
    private Resource getResourceByNameAndRelation(ReadGraph g,
            Resource parent, Resource relation, String name)
    throws DatabaseException {
        Collection<Resource> resources = g.getObjects(parent, relation);
        Resource newResource = null;
        Layer0 b = Layer0.getInstance(g);
        for (Resource r : resources) {
            String value = g.getPossibleRelatedValue(r, b.HasName);
            if (null != value && value.equals(name)) {
                newResource = r;
                break;
            }
        }
        return newResource;
    }
    private static Resource newResource;
    String saveTest(final int id) throws Exception {
        try {
            session = Tests.getTestHandler().getSession();
			final String newInstanceName = "" + id + newInstanceSuffix;
			final String desc = "" + id;

			session.syncRequest(new WriteRequest() {
	            @Override
	            public void perform(WriteGraph g) throws DatabaseException {
	                Layer0 b = Layer0.getInstance(g);
					newResource = g.newResource();
					g.claim(newResource, b.InstanceOf, null, b.Type);
					g.claimLiteral(newResource, b.HasName, newInstanceName);
                    Resource library = getResourceByNameAndRelation(g,
                            g.getRootLibrary(), b.ConsistsOf, libraryName);
                    assertTrue(null != library);
					g.claim(library, b.ConsistsOf, newResource);
					g.claimLiteral(newResource, b.HasDescription, desc);
				}
			});

            LifecycleSupport ls = session.getService(LifecycleSupport.class);
	        session.syncRequest(new ReadRequest() {
	            @Override
	            public void run(ReadGraph g) throws DatabaseException {
	                Layer0 b = Layer0.getInstance(g);
                    Resource library = getResourceByNameAndRelation(g,
                            g.getRootLibrary(), b.ConsistsOf, libraryName);
                    assertTrue(null != library);
                    Resource newResource = getResourceByNameAndRelation(g,
                            library, b.ConsistsOf, newInstanceName);
                    assertTrue(null != newResource);
					String s = g.getRelatedValue(newResource, b.HasDescription, Bindings.STRING);
					if (!s.equals(desc))
						throw new ValidationException("Value is not correct.");
					if (!g.isInstanceOf(newResource, b.Type))
						throw new ValidationException("Created resource is not an instance of Type");
				}
	        });
            ls.close();
            return newInstanceName;
        } catch (DatabaseException e) {
            throw e;
        } finally {
            Tests.closeSession(session);
        }
    }
    void checkTest(final List<String> names) throws Exception {
        try {
            session = Tests.getTestHandler().getSession();
            session.syncRequest(new ReadRequest() {
                @Override
                public void run(ReadGraph g) throws DatabaseException {
                    Layer0 b = Layer0.getInstance(g);
                    Resource library = getResourceByNameAndRelation(g,
                            g.getRootLibrary(), b.ConsistsOf, libraryName);
                    assertTrue(null != library);
                    for (String instanceName : names) {
                        Resource instance = getResourceByNameAndRelation(g,
                                library, b.ConsistsOf, instanceName);
                        assertTrue(instance != null);
                    }
                }
            });
            LifecycleSupport ls = session.getService(LifecycleSupport.class);
            ls.close(-1, false);
            if (DEBUG)
                System.out.println("close done");
        } catch (DatabaseException e) {
            throw e;
        } finally {
            Tests.closeSession(session);
        }
    }
}