/*
 * Copyright 2010 JBoss Inc
 *
 * 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.jsr94.rules;

/*
 * $Id: RuleRuntimeTestCase.java,v 1.7 2005/02/04 02:13:38 mproctor Exp $
 *
 * Copyright 2002-2004 (C) The Werken Company. All Rights Reserved.
 *
 * Redistribution and use of this software and associated documentation
 * ("Software"), with or without modification, are permitted provided that the
 * following conditions are met:
 *
 * 1. Redistributions of source code must retain copyright statements and
 * notices. Redistributions must also contain a copy of this document.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * 3. The name "drools" must not be used to endorse or promote products derived
 * from this Software without prior written permission of The Werken Company.
 * For written permission, please contact bob@werken.com.
 *
 * 4. Products derived from this Software may not be called "drools" nor may
 * "drools" appear in their names without prior written permission of The Werken
 * Company. "drools" is a registered trademark of The Werken Company.
 *
 * 5. Due credit should be given to The Werken Company.
 * (http://drools.werken.com/).
 *
 * THIS SOFTWARE IS PROVIDED BY THE WERKEN COMPANY AND CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE WERKEN COMPANY OR ITS CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

import java.io.InputStreamReader;
import java.io.Reader;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.rules.RuleExecutionSetNotFoundException;
import javax.rules.RuleRuntime;
import javax.rules.RuleServiceProvider;
import javax.rules.RuleServiceProviderManager;
import javax.rules.StatefulRuleSession;
import javax.rules.StatelessRuleSession;
import javax.rules.admin.LocalRuleExecutionSetProvider;
import javax.rules.admin.RuleAdministrator;
import javax.rules.admin.RuleExecutionSet;

import org.drools.RuleBaseConfiguration;
import org.drools.decisiontable.Cheese;
import org.drools.decisiontable.Person;
import org.drools.decisiontable.SpreadsheetIntegrationTest;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import static org.junit.Assert.*;

/**
 * Test the RuleRuntime implementation.
 */
public class RuleRuntimeTest extends RuleEngineTestBase {
    private LocalRuleExecutionSetProvider ruleSetProvider;

    private RuleAdministrator             ruleAdministrator;

    private String                        RULES_RESOURCE;

    /**
     * Setup the test case.
     */
    @Before
    public void setUp() throws Exception {
        super.setUp();
        this.RULES_RESOURCE = this.bindUri;
        this.ruleAdministrator = this.ruleServiceProvider.getRuleAdministrator();
        this.ruleSetProvider = this.ruleAdministrator.getLocalRuleExecutionSetProvider( null );
    }

    /**
     * Test createRuleSession.
     */
    @Test
    public void testCreateRuleStatelessRuleSession() throws Exception {
        final RuleRuntime ruleRuntime = this.ruleServiceProvider.getRuleRuntime();
        assertNotNull( "cannot obtain RuleRuntime",
                       ruleRuntime );

        // expect RuleExecutionSetNotFoundException
        try {
            ruleRuntime.createRuleSession( "someUri",
                                           null,
                                           RuleRuntime.STATELESS_SESSION_TYPE );
            fail( "RuleExecutionSetNotFoundException expected" );
        } catch ( final RuleExecutionSetNotFoundException ex ) {
            // ignore exception
        }

        // read rules and register with administrator
        final Reader ruleReader = new InputStreamReader( RuleRuntimeTest.class.getResourceAsStream( this.RULES_RESOURCE ) );
        final RuleExecutionSet ruleSet = this.ruleSetProvider.createRuleExecutionSet( ruleReader,
                                                                                      null );
        this.ruleAdministrator.registerRuleExecutionSet( this.RULES_RESOURCE,
                                                         ruleSet,
                                                         null );

        final StatelessRuleSession statelessRuleSession = (StatelessRuleSession) ruleRuntime.createRuleSession( this.RULES_RESOURCE,
                                                                                                                null,
                                                                                                                RuleRuntime.STATELESS_SESSION_TYPE );
        assertNotNull( "cannot obtain StatelessRuleSession",
                       statelessRuleSession );

        this.ruleAdministrator.deregisterRuleExecutionSet( this.RULES_RESOURCE,
                                                           null );
    }

    /**
     * Test createRuleSession.
     */
    @Test
    public void testCreateRuleStatefulRuleSession() throws Exception {
        final RuleRuntime ruleRuntime = this.ruleServiceProvider.getRuleRuntime();
        assertNotNull( "cannot obtain RuleRuntime",
                       ruleRuntime );

        // expect RuleExecutionSetNotFoundException
        try {
            ruleRuntime.createRuleSession( "someUri",
                                           null,
                                           RuleRuntime.STATEFUL_SESSION_TYPE );
            fail( "RuleExecutionSetNotFoundException expected" );
        } catch ( final RuleExecutionSetNotFoundException ex ) {
            // ignore exception
        }

        // read rules and register with administrator
        final Reader ruleReader = new InputStreamReader( RuleRuntimeTest.class.getResourceAsStream( this.RULES_RESOURCE ) );
        final RuleExecutionSet ruleSet = this.ruleSetProvider.createRuleExecutionSet( ruleReader,
                                                                                      null );
        this.ruleAdministrator.registerRuleExecutionSet( this.RULES_RESOURCE,
                                                         ruleSet,
                                                         null );

        final StatefulRuleSession statefulRuleSession = (StatefulRuleSession) ruleRuntime.createRuleSession( this.RULES_RESOURCE,
                                                                                                             null,
                                                                                                             RuleRuntime.STATEFUL_SESSION_TYPE );
        assertNotNull( "cannot obtain StatefulRuleSession",
                       statefulRuleSession );

        this.ruleAdministrator.deregisterRuleExecutionSet( this.RULES_RESOURCE,
                                                           null );
    }

    /**
     * Test getRegistrations.
     */
    @Test
    public void testGetRegistrations() throws Exception {
        final RuleRuntime ruleRuntime = this.ruleServiceProvider.getRuleRuntime();
        assertNotNull( "cannot obtain RuleRuntime",
                       ruleRuntime );

        // read rules and register with administrator
        final Reader ruleReader = new InputStreamReader( RuleRuntimeTest.class.getResourceAsStream( this.RULES_RESOURCE ) );
        final RuleExecutionSet ruleSet = this.ruleSetProvider.createRuleExecutionSet( ruleReader,
                                                                                      null );
        this.ruleAdministrator.registerRuleExecutionSet( this.RULES_RESOURCE,
                                                         ruleSet,
                                                         null );

        final List list = ruleRuntime.getRegistrations();
        assertTrue( "no registrations found",
                    list.size() > 0 );

        this.ruleAdministrator.deregisterRuleExecutionSet( this.RULES_RESOURCE,
                                                           null );
    }

    @Test
    public void testRuleBaseConfigurationConstant() throws Exception {
        // JBRULES-1061
        
        Map properties = new HashMap();
        properties.put( Constants.RES_SOURCE,
                        Constants.RES_SOURCE_TYPE_DECISION_TABLE );

        properties.put( Constants.RES_RULEBASE_CONFIG,
                        new RuleBaseConfiguration() );

        RuleServiceProviderManager.registerRuleServiceProvider( ExampleRuleEngineFacade.RULE_SERVICE_PROVIDER,
                                                                RuleServiceProviderImpl.class );

        RuleServiceProvider ruleServiceProvider = RuleServiceProviderManager.getRuleServiceProvider( ExampleRuleEngineFacade.RULE_SERVICE_PROVIDER );
        RuleAdministrator ruleAdministrator = ruleServiceProvider.getRuleAdministrator();
        LocalRuleExecutionSetProvider ruleSetProvider = ruleAdministrator.getLocalRuleExecutionSetProvider( null );

        try {
            RuleExecutionSet ruleExecutionSet = ruleSetProvider.createRuleExecutionSet( SpreadsheetIntegrationTest.class.getResourceAsStream( "IntegrationExampleTest.xls" ),
                                                                                        properties );
        } catch (Exception e) {
            // fail should not throw an Excetpion
        }
    }
}
