package org.jboss.windup.rules.apps.javaee.tests;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.UUID;

import javax.inject.Inject;

import org.apache.commons.io.FileUtils;
import org.apache.commons.lang3.StringUtils;
import org.jboss.arquillian.junit.Arquillian;
import org.jboss.windup.exec.WindupProcessor;
import org.jboss.windup.exec.configuration.WindupConfiguration;
import org.jboss.windup.graph.GraphContext;
import org.jboss.windup.graph.GraphContextFactory;
import org.jboss.windup.graph.model.ProjectModel;
import org.jboss.windup.graph.model.resource.FileModel;
import org.jboss.windup.graph.service.GraphService;
import org.jboss.windup.rules.apps.javaee.AbstractTest;
import org.jboss.windup.rules.apps.javaee.model.EjbMessageDrivenModel;
import org.jboss.windup.rules.apps.javaee.model.EjbSessionBeanModel;
import org.jboss.windup.rules.apps.javaee.model.EnvironmentReferenceModel;
import org.jboss.windup.rules.apps.javaee.model.JNDIResourceModel;
import org.jboss.windup.rules.apps.javaee.service.EnvironmentReferenceService;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;

/**
 * Test XML parsing of different vendors.
 * @author <a href="mailto:mbriskar@gmail.com">Matej Briskar</a>
 */
@RunWith(Arquillian.class)
public class EjbXmlParsingTest extends AbstractTest
{
    private static final String WEBLOGIC_TEST_EJB_XMLS = "../../test-files/ejb/weblogic-ejb-test";
    private static final String WEBSPHERE_TEST_EJB_XMLS = "../../test-files/ejb/websphere-ejb-test";
    private static final String JBOSS_TEST_EJB_XMLS = "../../test-files/ejb/jboss-ejb-test";
    private static final String ORION_TEST_EJB_XMLS = "../../test-files/ejb/orion-ejb-test";

    @Inject
    private WindupProcessor processor;

    @Inject
    private GraphContextFactory factory;

    @Test
    public void testEJBWebLogic() throws Exception
    {
        try (GraphContext context = factory.create())
        {
            startWindup(WEBLOGIC_TEST_EJB_XMLS, context);
            EnvironmentReferenceService envRefService = new EnvironmentReferenceService(context);
            GraphService<EjbSessionBeanModel> ejbSessionBeanService = new GraphService<>(context, EjbSessionBeanModel.class);
            EjbSessionBeanModel exampleService=ejbSessionBeanService.getUniqueByProperty(EjbMessageDrivenModel.EJB_BEAN_NAME, "WindupAnotherExampleService");

            Assert.assertEquals(exampleService.getGlobalJndiReference().getJndiLocation(), "session/service/WindupAnotherExampleServiceLocalHome");
            Assert.assertEquals(exampleService.getLocalJndiReference().getJndiLocation(), "ejb/WindupAnotherExampleServiceLocalHome");
            GraphService<JNDIResourceModel> jndiResources = new GraphService<>(context, JNDIResourceModel.class);
            int jndiCount = 0;
            Map<String, String> jndiHandler = new HashMap<>();
            
            testEjbSessionBeanTimeout(context, "WindupExampleService", "*", 3600);
            testMdbThreadPool(context, "WindupMLBean", "WindupMLBean-ThreadPool", 5, 2);
            
            int returnedJNDI = testResourceRef(context);

            Set<String> clusteredEjbNames = new HashSet<>();
            clusteredEjbNames.add("WindupExampleService");
            clusteredEjbNames.add("WindupAnotherExampleService");
            clusteredEjbNames.add("WindupStatefulClusteredService");
            testClusterdEjb(context, clusteredEjbNames);

            Assert.assertEquals("Directory " + WEBLOGIC_TEST_EJB_XMLS + " didn't register expected number of JNDIs for EJBs.", 14, returnedJNDI);
        }
    }

    private void testClusterdEjb(GraphContext context, Set<String> ejbNames)
    {
        GraphService<EjbSessionBeanModel> ejbService = new GraphService<>(context, EjbSessionBeanModel.class);
        for (EjbSessionBeanModel sessionBean : ejbService.findAll())
        {
            if (sessionBean.isClustered() != null && sessionBean.isClustered())
            {
                Assert.assertTrue("EJB: [" + sessionBean.getBeanName() + "] is not expected to be clustered.",
                            ejbNames.remove(sessionBean.getBeanName()));
            }
        }

        if (!ejbNames.isEmpty())
        {
            String results = StringUtils.join(ejbNames, ", ");
            Assert.fail("EJB(s) should be clustered but aren't: [" + results + "]");
        }

    }

    @Test
    public void testEJBWebSphere() throws Exception
    {
        try (GraphContext context = factory.create())
        {
            startWindup(WEBSPHERE_TEST_EJB_XMLS, context);
            EnvironmentReferenceService envRefService = new EnvironmentReferenceService(context);
            GraphService<JNDIResourceModel> jndiResources = new GraphService<>(context, JNDIResourceModel.class);
            int jndiCount = 0;
            Map<String, String> jndiHandler = new HashMap<>();
            int returnedJNDI = testResourceRef(context);
            Assert.assertEquals("Directory " + WEBSPHERE_TEST_EJB_XMLS + " didn't register expected number of JNDIs for EJBs.", 9, returnedJNDI);
        }
    }

    @Test
    public void testEJBOrion() throws Exception
    {
        try (GraphContext context = factory.create())
        {
            startWindup(ORION_TEST_EJB_XMLS, context);
            GraphService<EjbSessionBeanModel> ejbSessionBeanService = new GraphService<>(context, EjbSessionBeanModel.class);

            // test that session beans have set JNDI by <<session-deployment>
            EjbSessionBeanModel exampleService = ejbSessionBeanService.getUniqueByProperty(EjbMessageDrivenModel.EJB_BEAN_NAME,
                        "WindupExampleService");
            Assert.assertEquals(exampleService.getGlobalJndiReference().getJndiLocation(), "session/service/WindupExampleServiceLocalHome");

            EjbSessionBeanModel anotherExampleService = ejbSessionBeanService.getUniqueByProperty(EjbMessageDrivenModel.EJB_BEAN_NAME,
                        "WindupAnotherExampleService");
            Assert.assertEquals(anotherExampleService.getGlobalJndiReference().getJndiLocation(),
                        "session/service/WindupAnotherExampleServiceLocalHome");

            // test <message-driven-deployment>
            GraphService<EjbMessageDrivenModel> mdbService = new GraphService<>(context, EjbMessageDrivenModel.class);
            EjbMessageDrivenModel mdb = mdbService.getUniqueByProperty(EjbMessageDrivenModel.EJB_BEAN_NAME, "WindupMLBean");
            Assert.assertEquals("Message driven bean destination was not loaded correctly for Orion.", mdb.getDestination().getJndiLocation(),
                        "queue/WindupMLQueue");

            // test <resource-ref-mapping>
            int foundJndi = testResourceRef(context);

            Assert.assertEquals("Directory " + ORION_TEST_EJB_XMLS + " didn't register expected number of JNDIs for EJBs.", 8, foundJndi);
        }
    }

    @Test
    public void testEJBJBoss() throws Exception
    {
        try (GraphContext context = factory.create())
        {
            startWindup(JBOSS_TEST_EJB_XMLS, context);
            GraphService<EjbSessionBeanModel> ejbSessionBeanService = new GraphService<>(context, EjbSessionBeanModel.class);

            //test <message-driven>
            GraphService<EjbMessageDrivenModel> mdbService = new GraphService<>(context, EjbMessageDrivenModel.class);
            EjbMessageDrivenModel mdb = mdbService.getUniqueByProperty(EjbMessageDrivenModel.EJB_BEAN_NAME, "WindupMLBean");
            Assert.assertEquals("Message driven bean destination was not loaded correctly for JBoss.", mdb.getDestination().getJndiLocation(),
                        "queue/WindupMLQueue");

            Set<String> clusteredEjbNames = new HashSet<>();
            clusteredEjbNames.add("WindupExampleService");
            clusteredEjbNames.add("WindupAnotherExampleService");
            clusteredEjbNames.add("WindupStatefulClusteredService");
            testClusterdEjb(context, clusteredEjbNames);

            testEjbSessionBeanTimeout(context, "WindupExampleService", "*", 3600);

            // test <resource-ref-mapping>
            int foundJndi = testResourceRef(context);

            Assert.assertEquals("Directory " + JBOSS_TEST_EJB_XMLS + " didn't register expected number of JNDIs for EJBs.", 14, foundJndi);
            int msgDrivenFound = 0;
        }
    }

    private int testResourceRef(GraphContext context, Map<String, String> jndiToEnv)
    {
        GraphService<JNDIResourceModel> jndiResources = new GraphService<>(context, JNDIResourceModel.class);
        EnvironmentReferenceService envRefService = new EnvironmentReferenceService(context);
        int jndiCount = 0;
        for (JNDIResourceModel jndiResourceModel : jndiResources.findAll())
        {
            if (jndiToEnv.containsKey(jndiResourceModel.getJndiLocation()))
            {
                String envRef = jndiToEnv.get(jndiResourceModel.getJndiLocation());
                int envCount = 0;
                for (EnvironmentReferenceModel environmentReferenceModel : envRefService
                            .findAllByProperty(EnvironmentReferenceModel.NAME, envRef))
                {
                    Assert.assertNotNull(environmentReferenceModel.getJndiReference());
                    Assert.assertEquals(environmentReferenceModel.getJndiReference().getJndiLocation(), jndiResourceModel.getJndiLocation());
                    envCount++;
                }
                Assert.assertTrue(envCount > 0);
            }
            jndiCount++;
        }
        return jndiCount;
    }

    /**
     * Tests that the jndiHandlers are correctly mapped to environment resources and returns the number of jndi Handlers registered
     * 
     * @param context
     * @param jndiHandler
     * @return
     */
    private int testResourceRef(GraphContext context)
    {
        Map<String, String> jndiHandler = new HashMap<>();
        jndiHandler.put("/WindupMail", "smtp/WindupMail");
        jndiHandler.put("jdbc/WindupDS", "jdbc/WindupDataSource");
        jndiHandler.put("/ConnectionFactory", "jms/WindupTopicConnectionFactory");
        return testResourceRef(context,jndiHandler);
    }
    
    private void testEjbSessionBeanTimeout(GraphContext context, String ejbName, String patternExpected, Integer timeoutInSecondsExpected) {
        GraphService<EjbSessionBeanModel> service = new GraphService<>(context, EjbSessionBeanModel.class);
        boolean found = false;
        
        EjbSessionBeanModel result = service.getUniqueByProperty(EjbSessionBeanModel.EJB_BEAN_NAME, ejbName);
        if(result != null) {
            if(result.getTxTimeouts().containsKey(patternExpected)) {
                Integer val = result.getTxTimeouts().get(patternExpected);
                found = true;
                Assert.assertTrue("For EJB: ["+ejbName+"] with pattern: ["+patternExpected+"] expected EJB timeout: ["+timeoutInSecondsExpected+"] actually ["+val+"]", timeoutInSecondsExpected.equals(val));
            }
        }
        Assert.assertTrue("Expected EJB: ["+ejbName+"] with pattern: ["+patternExpected+"] and timeout ["+timeoutInSecondsExpected+"]", found);
    }
    
    private void testMdbSessionBeanTimeout(GraphContext context, String mdbName, String patternExpected, Integer timeoutInSecondsExpected) {
        GraphService<EjbMessageDrivenModel> service = new GraphService<>(context, EjbMessageDrivenModel.class);
        
        boolean found = false;
        
        EjbMessageDrivenModel result = service.getUniqueByProperty(EjbMessageDrivenModel.EJB_BEAN_NAME, mdbName);
        if(result != null) {
            if(result.getTxTimeouts().containsKey(patternExpected)) {
                Integer val = result.getTxTimeouts().get(patternExpected);
                found = true;
                Assert.assertTrue("For MDB: ["+mdbName+"] with pattern: ["+patternExpected+"] expected EJB timeout: ["+timeoutInSecondsExpected+"] actually ["+val+"]", timeoutInSecondsExpected.equals(val));
            }
        }
        Assert.assertTrue("Expected MDB: [" + mdbName + "] with pattern: [" + patternExpected + "] and timeout [" + timeoutInSecondsExpected + "]",
                    found);
        
    }

    private void startWindup(String xmlFilePath, GraphContext context) throws IOException
    {
        ProjectModel pm = context.getFramed().addVertex(null, ProjectModel.class);
        pm.setName("Main Project");
        FileModel inputPath = context.getFramed().addVertex(null, FileModel.class);
        inputPath.setFilePath(xmlFilePath);

        Path outputPath = Paths.get(FileUtils.getTempDirectory().toString(), "windup_"
                    + UUID.randomUUID().toString());
        FileUtils.deleteDirectory(outputPath.toFile());
        Files.createDirectories(outputPath);

        pm.addFileModel(inputPath);
        pm.setRootFileModel(inputPath);
        WindupConfiguration windupConfiguration = new WindupConfiguration()
                    .setGraphContext(context);
        windupConfiguration.addInputPath(Paths.get(inputPath.getFilePath()));
        windupConfiguration.setOutputDirectory(outputPath);
        processor.execute(windupConfiguration);
    }
    
    
    private void testEjbSessionBeanThreadPool(GraphContext context, String ejbName, String threadPoolName, Integer maxPoolSize, Integer minPoolSize) {
        GraphService<EjbSessionBeanModel> service = new GraphService<>(context, EjbSessionBeanModel.class);
        boolean found = false;
        
        EjbSessionBeanModel result = service.getUniqueByProperty(EjbSessionBeanModel.EJB_BEAN_NAME, ejbName);
        if(result != null) {
            if(result.getThreadPool()!=null) {
                found = true;
                Assert.assertTrue("For EJB: ["+ejbName+"] with pool name: ["+threadPoolName+"] max: ["+maxPoolSize+"] min: ["+minPoolSize+"], actual name: ["+result.getThreadPool().getPoolName()+"] max: ["+result.getThreadPool().getMaxPoolSize()+"] min: ["+result.getThreadPool().getMinPoolSize()+"]", maxPoolSize.equals(result.getThreadPool().getMaxPoolSize()) && minPoolSize.equals(result.getThreadPool().getMinPoolSize()) && threadPoolName.equals(result.getThreadPool().getPoolName()));
            }
        }
        Assert.assertTrue("For EJB: ["+ejbName+"] with name: ["+threadPoolName+"] max: ["+maxPoolSize+"] min: ["+minPoolSize+"]", found);
    }
    
    private void testMdbThreadPool(GraphContext context, String mdbName, String threadPoolName, Integer maxPoolSize, Integer minPoolSize) {
        GraphService<EjbMessageDrivenModel> service = new GraphService<>(context, EjbMessageDrivenModel.class);
        
        boolean found = false;
        
        EjbMessageDrivenModel result = service.getUniqueByProperty(EjbMessageDrivenModel.EJB_BEAN_NAME, mdbName);
        if(result != null) {
            if(result.getThreadPool()!=null) {
                found = true;
                Assert.assertTrue("For MDB: ["+mdbName+"] with pool name: ["+threadPoolName+"] max: ["+maxPoolSize+"] min: ["+minPoolSize+"], actual name: ["+result.getThreadPool().getPoolName()+"] max: ["+result.getThreadPool().getMaxPoolSize()+"] min: ["+result.getThreadPool().getMinPoolSize()+"]", maxPoolSize.equals(result.getThreadPool().getMaxPoolSize()) && minPoolSize.equals(result.getThreadPool().getMinPoolSize()) && threadPoolName.equals(result.getThreadPool().getPoolName()));
            }
        }
        Assert.assertTrue("For MDB: ["+mdbName+"] with name: ["+threadPoolName+"] max: ["+maxPoolSize+"] min: ["+minPoolSize+"]", found);
     }
}
