package com.armedia.acm.activiti.services;

/*-
 * #%L
 * Tool Integrations: Activiti Configuration
 * %%
 * Copyright (C) 2014 - 2018 ArkCase LLC
 * %%
 * This file is part of the ArkCase software. 
 * 
 * If the software was purchased under a paid ArkCase license, the terms of 
 * the paid license agreement will prevail.  Otherwise, the software is 
 * provided under the following open source license terms:
 * 
 * ArkCase is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *  
 * ArkCase is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with ArkCase. If not, see <http://www.gnu.org/licenses/>.
 * #L%
 */

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;

import com.armedia.acm.activiti.exceptions.AcmBpmnException;
import com.armedia.acm.activiti.model.AcmProcessDefinition;
import com.armedia.acm.activiti.services.dao.AcmBpmnDao;

import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngineConfiguration;
import org.apache.commons.codec.digest.DigestUtils;
import org.easymock.Capture;
import org.easymock.EasyMock;
import org.easymock.EasyMockSupport;
import org.easymock.IAnswer;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import org.springframework.test.annotation.DirtiesContext;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import java.io.Closeable;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.net.URISyntaxException;
import java.util.HashSet;
import java.util.Set;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:spring/spring-library-test-activiti-process-definition-service.xml")
@DirtiesContext(classMode = DirtiesContext.ClassMode.AFTER_EACH_TEST_METHOD)
public class AcmBpmnServiceTest extends EasyMockSupport
{

    @Autowired
    AcmBpmnServiceImpl processDefinitionManagementService;

    private AcmBpmnDao acmBpmnDao;
    private Capture<AcmProcessDefinition> capture;
    private ProcessEngine processEngine;
    private Resource resourceFile;
    private Resource resourceFileNotChanged;
    private Resource resourceFileChanged;
    private Set<String> filesToDelete = null;
    private String resourceFileMD5Sum;
    private String resourceFileNotChangedMD5Sum;
    private String resourceFileChangedMD5Sum;

    @Before
    public void setUp() throws Exception
    {
        filesToDelete = new HashSet<>();
        resourceFile = new ClassPathResource("/activiti/TestActivitiSpringProcess.bpmn20.xml");
        resourceFileMD5Sum = getDigest(resourceFile.getFile());
        resourceFileNotChanged = new ClassPathResource("/activiti/TestActivitiSpringProcessNotChanged.bpmn20.xml");
        resourceFileNotChangedMD5Sum = getDigest(resourceFileNotChanged.getFile());
        resourceFileChanged = new ClassPathResource("/activiti/TestActivitiSpringProcessChanged.bpmn20.xml");
        resourceFileChangedMD5Sum = getDigest(resourceFileChanged.getFile());
        processEngine = ProcessEngineConfiguration.createStandaloneInMemProcessEngineConfiguration().buildProcessEngine();
        processDefinitionManagementService.setActivitiRepositoryService(processEngine.getRepositoryService());
        acmBpmnDao = createMock(AcmBpmnDao.class);
        processDefinitionManagementService.setAcmBpmnDao(acmBpmnDao);
    }

    @After
    public void destroy()
    {
        processEngine.close();
    }

    @Test
    public void deployProcessDefinitionTest() throws IOException, URISyntaxException
    {
        File f = resourceFile.getFile();
        assertTrue(f.exists());
        EasyMock.expect(acmBpmnDao.getByKeyAndDigest("TestActivitiSpringProcessUnitTest", resourceFileMD5Sum)).andReturn(null);
        capture = EasyMock.newCapture();
        EasyMock.expect(acmBpmnDao.save(EasyMock.capture(capture))).andAnswer(new IAnswer<AcmProcessDefinition>()
        {
            @Override
            public AcmProcessDefinition answer() throws Throwable
            {
                capture.getValue().setId(1l);
                return capture.getValue();
            }
        });

        acmBpmnDao.remove(EasyMock.anyObject());
        EasyMock.expectLastCall().once();
        EasyMock.replay(acmBpmnDao);

        AcmProcessDefinition pd = processDefinitionManagementService.deploy(f, "", false, false);
        filesToDelete.add(pd.getFileName());
        assertNotNull(pd);
        assertEquals(Long.valueOf(1l), pd.getId());
        assertEquals("1", pd.getDeploymentId());
        assertEquals("Testing Activiti Spring Module", pd.getName());
        assertEquals("TestActivitiSpringProcessUnitTest_v1.bpmn20.xml", pd.getFileName());
        assertEquals("", pd.getDescription());
        assertEquals(1, pd.getVersion());
        assertEquals("TestActivitiSpringProcessUnitTest", pd.getKey());

        // check if file is deleted from temp folder
        assertTrue(f.exists());

        // cleanup
        processDefinitionManagementService.remove(pd, true);
    }

    @Test
    public void deployExistingProcessDefinitionTest() throws IOException, URISyntaxException
    {
        File f = resourceFile.getFile();
        File f1 = resourceFileNotChanged.getFile();

        assertTrue(f.exists());
        EasyMock.expect(acmBpmnDao.getByKeyAndDigest("TestActivitiSpringProcessUnitTest", resourceFileMD5Sum)).andReturn(null);
        AcmProcessDefinition fromDBExisting = new AcmProcessDefinition();
        fromDBExisting.setId(1l);
        fromDBExisting.setDeploymentId("1");
        fromDBExisting.setName("Testing Activiti Spring Module");
        fromDBExisting.setFileName("TestActivitiSpringProcessUnitTest_v1.bpmn20.xml");
        fromDBExisting.setDescription(null);
        fromDBExisting.setVersion(1);
        fromDBExisting.setSha256Hash("ecf918b65e9ad2b6aaf51166aa3cac9a");
        fromDBExisting.setKey("TestActivitiSpringProcessUnitTest");
        EasyMock.expect(acmBpmnDao.getByKeyAndDigest("TestActivitiSpringProcessUnitTest", resourceFileNotChangedMD5Sum))
                .andReturn(fromDBExisting);
        capture = EasyMock.newCapture();
        EasyMock.expect(acmBpmnDao.save(EasyMock.capture(capture))).andAnswer(new IAnswer<AcmProcessDefinition>()
        {
            @Override
            public AcmProcessDefinition answer() throws Throwable
            {
                capture.getValue().setId(1l);
                return capture.getValue();
            }
        });

        acmBpmnDao.remove(EasyMock.anyObject());
        EasyMock.expectLastCall().times(1);
        EasyMock.replay(acmBpmnDao);

        AcmProcessDefinition pd = processDefinitionManagementService.deploy(f, "", false, false);
        filesToDelete.add(pd.getFileName());
        assertNotNull(pd);
        assertEquals(Long.valueOf(1l), pd.getId());
        assertEquals("1", pd.getDeploymentId());
        assertEquals("Testing Activiti Spring Module", pd.getName());
        assertEquals("TestActivitiSpringProcessUnitTest_v1.bpmn20.xml", pd.getFileName());
        assertEquals("", pd.getDescription());
        assertEquals(1, pd.getVersion());
        assertEquals("TestActivitiSpringProcessUnitTest", pd.getKey());

        AcmProcessDefinition pd1 = processDefinitionManagementService.deploy(f1, "", false, false);
        filesToDelete.add(pd1.getFileName());
        assertNotNull(pd1);
        assertEquals(Long.valueOf(1l), pd1.getId());
        assertEquals("1", pd1.getDeploymentId());
        assertEquals("Testing Activiti Spring Module", pd1.getName());
        assertEquals("TestActivitiSpringProcessUnitTest_v1.bpmn20.xml", pd1.getFileName());
        assertEquals(null, pd1.getDescription());
        assertEquals(1, pd1.getVersion());
        assertEquals("TestActivitiSpringProcessUnitTest", pd1.getKey());

        // check if file is deleted from temp folder
        assertTrue(f.exists());

        // cleanup
        processDefinitionManagementService.remove(pd, true);
    }

    @Test
    public void deployNotExistingProcessDefinitionTest() throws IOException, URISyntaxException
    {
        File f = resourceFile.getFile();
        File f1 = resourceFileChanged.getFile();

        assertTrue(f.exists());
        capture = EasyMock.newCapture();
        EasyMock.expect(acmBpmnDao.getByKeyAndDigest("TestActivitiSpringProcessUnitTest", resourceFileMD5Sum)).andReturn(null);
        EasyMock.expect(acmBpmnDao.getByKeyAndDigest("TestActivitiSpringProcessUnitTest", resourceFileChangedMD5Sum)).andReturn(null);
        EasyMock.expect(acmBpmnDao.save(EasyMock.capture(capture))).andAnswer(new IAnswer<AcmProcessDefinition>()
        {
            @Override
            public AcmProcessDefinition answer() throws Throwable
            {
                capture.getValue().setId(1l);
                return capture.getValue();
            }
        });
        EasyMock.expect(acmBpmnDao.save(EasyMock.capture(capture))).andAnswer(new IAnswer<AcmProcessDefinition>()
        {
            @Override
            public AcmProcessDefinition answer() throws Throwable
            {
                capture.getValue().setId(2l);
                return capture.getValue();
            }
        });

        acmBpmnDao.remove(EasyMock.anyObject());
        EasyMock.expectLastCall().times(2);
        EasyMock.replay(acmBpmnDao);

        AcmProcessDefinition pd = processDefinitionManagementService.deploy(f, "", false, false);
        filesToDelete.add(pd.getFileName());
        assertNotNull(pd);
        assertEquals(Long.valueOf(1l), pd.getId());
        assertEquals("1", pd.getDeploymentId());
        assertEquals("Testing Activiti Spring Module", pd.getName());
        assertEquals("TestActivitiSpringProcessUnitTest_v1.bpmn20.xml", pd.getFileName());
        assertEquals("", pd.getDescription());
        assertEquals(1, pd.getVersion());
        assertEquals("TestActivitiSpringProcessUnitTest", pd.getKey());

        AcmProcessDefinition pd1 = processDefinitionManagementService.deploy(f1, "", false, false);
        filesToDelete.add(pd1.getFileName());
        assertNotNull(pd1);
        assertEquals(Long.valueOf(2l), pd1.getId());
        assertEquals("4", pd1.getDeploymentId());
        assertEquals("Testing Activiti Spring Module", pd1.getName());
        assertEquals("TestActivitiSpringProcessUnitTest_v2.bpmn20.xml", pd1.getFileName());
        assertEquals("", pd1.getDescription());
        assertEquals(2, pd1.getVersion());
        assertEquals("TestActivitiSpringProcessUnitTest", pd1.getKey());

        // check if file is deleted from temp folder
        assertTrue(f.exists());

        // cleanup
        processDefinitionManagementService.remove(pd, true);
        processDefinitionManagementService.remove(pd1, true);
    }

    @Test
    public void countProcessDefinitionsEmptyTest()
    {
        EasyMock.expect(acmBpmnDao.count()).andReturn(0l);
        EasyMock.replay(acmBpmnDao);
        assertEquals(0, processDefinitionManagementService.count());
    }

    @Test
    public void countProcessDefinitionsTest() throws URISyntaxException
    {
        EasyMock.expect(acmBpmnDao.count()).andReturn(1l);
        EasyMock.replay(acmBpmnDao);
        assertEquals(1, processDefinitionManagementService.count());
    }


    public String getDigest(File processDefinitionFile)
    {
        try
        {
            FileInputStream stream = new FileInputStream(processDefinitionFile);

            String sha256Hex = DigestUtils.sha256Hex(stream);
            closeStream(stream);
            return sha256Hex;
        }
        catch (IOException e)
        {
            throw new AcmBpmnException("Error performing file digest!", e);
        }
    }

    private void closeStream(Closeable stream)
    {
        if (stream != null)
        {
            try
            {
                stream.close();
            }
            catch (IOException e)
            {

            }
        }
    }
}