/*
 * Copyright 2017 Graz University of Technology EAAF-Core Components has been developed in a
 * cooperation between EGIZ, A-SIT Plus, A-SIT, and Graz University of Technology.
 *
 * Licensed under the EUPL, Version 1.2 or - as soon they will be approved by the European
 * Commission - subsequent versions of the EUPL (the "Licence"); You may not use this work except in
 * compliance with the Licence. You may obtain a copy of the Licence at:
 * https://joinup.ec.europa.eu/news/understanding-eupl-v12
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the Licence
 * is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the Licence for the specific language governing permissions and limitations under
 * the Licence.
 *
 * This product combines work with different licenses. See the "NOTICE" text file for details on the
 * various modules and licenses. The "NOTICE" text file is part of the distribution. Any derivative
 * works that you distribute must include a readable copy of the "NOTICE" text file.
*/

package at.gv.egiz.eaaf.core.impl.idp.process.spring.test;

import static at.gv.egiz.eaaf.core.impl.idp.process.ProcessInstanceState.NOT_STARTED;
import static at.gv.egiz.eaaf.core.impl.idp.process.ProcessInstanceState.SUSPENDED;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;

import java.io.IOException;
import java.io.InputStream;

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import at.gv.egiz.eaaf.core.api.idp.process.ExecutionContext;
import at.gv.egiz.eaaf.core.api.idp.process.ProcessEngine;
import at.gv.egiz.eaaf.core.exceptions.ProcessExecutionException;
import at.gv.egiz.eaaf.core.impl.idp.module.test.TestRequestImpl;
import at.gv.egiz.eaaf.core.impl.idp.process.ProcessDefinitionParserException;
import at.gv.egiz.eaaf.core.impl.idp.process.ProcessEngineImpl;
import at.gv.egiz.eaaf.core.impl.idp.process.ProcessInstance;
import at.gv.egiz.eaaf.core.impl.idp.process.spring.SpringExpressionEvaluator;

/**
 * Tests the process engine using processes based on Spring EL referencing the
 * process context and further Spring beans.
 *
 * @author tknall
 *
 */
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("/process/spring/test/SpringExpressionAwareProcessEngineTest-context.xml")
public class SpringExpressionAwareProcessEngineTest {

  @Autowired
  private static ProcessEngine pe;
  @Autowired
  private ApplicationContext applicationContext;

  private final boolean isInitialized = false;

  /**
   * jUnit test set-up.
   *
   * @throws IOException                      in case of an error
   * @throws ProcessDefinitionParserException in case of an error
   */
  @Before
  public void init() throws IOException, ProcessDefinitionParserException {

    if (!isInitialized) {

      if (pe == null) {
        pe = applicationContext.getBean("processEngine", ProcessEngine.class);

      }

      ((ProcessEngineImpl) pe)
          .setTransitionConditionExpressionEvaluator(new SpringExpressionEvaluator());
      try (InputStream in = SpringExpressionAwareProcessEngineTest.class
          .getResourceAsStream("/process/spring/test/SampleProcessDefinitionWithExpression1.xml")) {
        ((ProcessEngineImpl) pe).registerProcessDefinition(in);
      }
      try (InputStream in = SpringExpressionAwareProcessEngineTest.class.getResourceAsStream(
          "/process/spring/test/SampleProcessDefinitionForSAML1Authentication.xml")) {
        ((ProcessEngineImpl) pe).registerProcessDefinition(in);
      }

      // initHibernateForTesting();
    }
  }

  @Test
  public void testSampleProcessDefinitionWithExpression1()
      throws IOException, ProcessDefinitionParserException, ProcessExecutionException {

    final TestRequestImpl req = new TestRequestImpl();

    final String piId = pe.createProcessInstance("SampleProcessWithExpression1");
    ProcessInstance pi = pe.getProcessInstance(piId);
    assertEquals(NOT_STARTED, pi.getState());

    // start process
    req.setProcessInstanceID(piId);
    pe.start(req);

    // processInstance should be removed when it ends
    try {
      pi = pe.getProcessInstance(piId);
      throw new ProcessExecutionException(
          "ProcessInstance should be removed already, but it was found.");
      // assertEquals(ENDED, pi.getState());

    } catch (final IllegalArgumentException e) {
      // do nothing because processInstance should be already removed

    }
  }

  @Test
  public void testSampleProcessDefinitionForSaml1Authentication()
      throws IOException, ProcessDefinitionParserException, ProcessExecutionException {

    final TestRequestImpl req = new TestRequestImpl();

    final String piId = pe.createProcessInstance("SampleProcessDefinitionForSAML1Authentication");
    ProcessInstance pi = pe.getProcessInstance(piId);
    assertEquals(NOT_STARTED, pi.getState());

    // start process
    req.setProcessInstanceID(piId);
    pe.start(req);
    pi = pe.getProcessInstance(piId);
    assertEquals(SUSPENDED, pi.getState());

    final ExecutionContext ec = pi.getExecutionContext();
    assertNotNull(ec);
    System.out.println(ec.keySet());

    assertNotNull(ec.get("bkuURL"));
    assertNotNull(ec.get("IdentityLink"));
    assertNotNull(ec.get("isIdentityLinkValidated"));
    assertNotNull(ec.get("SignedAuthBlock"));
    assertNotNull(ec.get("isSignedAuthBlockValidated"));
    assertNotNull(ec.get("SAML1Assertion"));

    pe.signal(req);
    try {
      pi = pe.getProcessInstance(piId);
      throw new ProcessExecutionException(
          "ProcessInstance should be removed already, but it was found.");
      // assertEquals(ENDED, pi.getState());

    } catch (final IllegalArgumentException e) {
      // do nothing because processInstance should be already removed

    }

  }

}