/*
 * Copyright 2015 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.
 * 
 *      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.jbpm.process.builder;

import static org.junit.Assert.assertEquals;

import java.io.StringReader;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;

import org.drools.compiler.builder.impl.KnowledgeBuilderImpl;
import org.drools.compiler.compiler.DialectCompiletimeRegistry;
import org.drools.compiler.lang.descr.ActionDescr;
import org.drools.compiler.lang.descr.ProcessDescr;
import org.drools.compiler.rule.builder.dialect.java.JavaDialect;
import org.drools.core.common.InternalWorkingMemory;
import org.drools.core.definitions.InternalKnowledgePackage;
import org.drools.core.definitions.impl.KnowledgePackageImpl;
import org.drools.core.spi.ProcessContext;
import org.jbpm.process.builder.dialect.ProcessDialect;
import org.jbpm.process.builder.dialect.ProcessDialectRegistry;
import org.jbpm.process.instance.impl.Action;
import org.jbpm.test.util.AbstractBaseTest;
import org.jbpm.workflow.core.DroolsAction;
import org.jbpm.workflow.core.impl.DroolsConsequenceAction;
import org.jbpm.workflow.core.impl.WorkflowProcessImpl;
import org.jbpm.workflow.core.node.ActionNode;
import org.junit.Test;
import org.kie.internal.KnowledgeBase;
import org.kie.internal.KnowledgeBaseFactory;
import org.kie.internal.runtime.StatefulKnowledgeSession;

public class JavaActionBuilderTest extends AbstractBaseTest {

    @Test
    public void testSimpleAction() throws Exception {
        final InternalKnowledgePackage pkg = new KnowledgePackageImpl( "pkg1" );

        ActionDescr actionDescr = new ActionDescr();
        actionDescr.setText( "list.add( \"hello world\" );" );       

        KnowledgeBuilderImpl pkgBuilder = new KnowledgeBuilderImpl( pkg );
        DialectCompiletimeRegistry dialectRegistry = pkgBuilder.getPackageRegistry( pkg.getName() ).getDialectCompiletimeRegistry();
        JavaDialect javaDialect = ( JavaDialect ) dialectRegistry.getDialect( "java" );

        ProcessDescr processDescr = new ProcessDescr();
        processDescr.setClassName( "Process1" );
        processDescr.setName( "Process1" );
        
        WorkflowProcessImpl process = new WorkflowProcessImpl();
        process.setName( "Process1" );
        process.setPackageName( "pkg1" );

        ProcessBuildContext context = new ProcessBuildContext(pkgBuilder, pkgBuilder.getPackage(), null, processDescr, dialectRegistry, javaDialect);
        
        context.init( pkgBuilder, pkg, null, dialectRegistry, javaDialect, null);
        
        pkgBuilder.addPackageFromDrl( new StringReader("package pkg1;\nglobal java.util.List list;\n") );        
        
        ActionNode actionNode = new ActionNode();
        DroolsAction action = new DroolsConsequenceAction("java", null);
        actionNode.setAction(action);
        
        ProcessDialect dialect = ProcessDialectRegistry.getDialect( "java" );            
        dialect.getActionBuilder().build( context, action, actionDescr, actionNode );
        dialect.addProcess( context );
        javaDialect.compileAll();            
        assertEquals( 0, javaDialect.getResults().size() );

        final KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
        kbase.addKnowledgePackages( (Collection) Arrays.asList(pkgBuilder.getPackage()) );
        final StatefulKnowledgeSession wm = kbase.newStatefulKnowledgeSession();

        List<String> list = new ArrayList<String>();
        wm.setGlobal( "list", list );        
        
        ProcessContext processContext = new ProcessContext( ((InternalWorkingMemory) wm).getKnowledgeRuntime() );
        ((Action) actionNode.getAction().getMetaData("Action")).execute( processContext );
       
        assertEquals("hello world", list.get(0) );
    }    
    

}