/*
 * Copyright 2017 Red Hat, Inc. and/or its affiliates.
 *
 * 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.
 */

package org.drools.persistence.kie.persistence.session;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import javax.naming.InitialContext;
import javax.transaction.UserTransaction;

import org.drools.persistence.util.DroolsPersistenceUtil;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.kie.api.KieBase;
import org.kie.api.KieServices;
import org.kie.api.io.ResourceType;
import org.kie.api.runtime.Environment;
import org.kie.api.runtime.EnvironmentName;
import org.kie.api.runtime.KieSession;
import org.kie.internal.utils.KieHelper;

import static org.drools.persistence.util.DroolsPersistenceUtil.DROOLS_PERSISTENCE_UNIT_NAME;
import static org.drools.persistence.util.DroolsPersistenceUtil.createEnvironment;
import static org.junit.Assert.assertEquals;

public class SimpleJpaPersistentStatefulSessionWithOOPathTest {

    private Map<String, Object> context;
    private Environment env;

    @Before
    public void setUp() throws Exception {
        context = DroolsPersistenceUtil.setupWithPoolingDataSource( DROOLS_PERSISTENCE_UNIT_NAME );
        env = createEnvironment(context);
        env.set( EnvironmentName.USE_PESSIMISTIC_LOCKING, true );
    }

    @After
    public void tearDown() throws Exception {
        DroolsPersistenceUtil.cleanUp(context);
    }

    @Test
    public void testUserTransactionsOOpath() throws Exception {
        testUserTransactions( true );
    }

    @Test
    public void testUserTransactionsNoOOpath() throws Exception {
        testUserTransactions( false );
    }

    private void testUserTransactions(boolean oopath) throws Exception {
        String str = "package org.kie.test\n" +
                     "global java.util.List list\n" +
                     "rule rule1\n" +
                     "when\n" +
                     ( oopath ? " $i: Integer( /intValue{this > 0})\n" : " $i : Integer(intValue > 0)\n" ) +
                     "then\n" +
                     " list.add( $i );\n" +
                     "end\n";

        KieBase kbase = new KieHelper().addContent( str, ResourceType.DRL ).build();

        UserTransaction ut = (UserTransaction) new InitialContext().lookup( "java:comp/UserTransaction" );
        ut.begin();
        KieSession ksession = KieServices.get().getStoreServices().newKieSession( kbase, null, env );
        ut.commit();

        final List<?> list = new ArrayList<>();

        // insert and commit
        ut = (UserTransaction) new InitialContext().lookup( "java:comp/UserTransaction" );
        ut.begin();
        ksession.setGlobal( "list",
                            list );
        ksession.insert( 1 );
        ksession.insert( 2 );
        ksession.fireAllRules();
        ut.commit();

        // insert and rollback
        ut = (UserTransaction) new InitialContext().lookup("java:comp/UserTransaction");
        ut.begin();
        ksession.insert(3);
        ut.rollback();

        // check we rolled back the state changes from the 3rd insert
        ut = (UserTransaction) new InitialContext().lookup( "java:comp/UserTransaction" );
        ut.begin();
        ksession.fireAllRules();
        ut.commit();
        assertEquals( 2,
                      list.size() );
    }
}