/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you 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.apache.maven.shared.release;
  
  import javax.inject.Singleton;
  
  import java.io.File;
  import java.io.InputStream;
  import java.util.Map;
  
  import com.google.inject.AbstractModule;
  import com.google.inject.Module;
  import org.apache.maven.scm.manager.ScmManager;
  import org.apache.maven.shared.release.stubs.ScmManagerStub;
  import org.codehaus.plexus.ContainerConfiguration;
  import org.codehaus.plexus.DefaultContainerConfiguration;
  import org.codehaus.plexus.DefaultPlexusContainer;
  import org.codehaus.plexus.PlexusConstants;
  import org.codehaus.plexus.PlexusContainer;
  import org.codehaus.plexus.PlexusContainerException;
  import org.codehaus.plexus.configuration.PlexusConfiguration;
  import org.codehaus.plexus.context.Context;
  import org.codehaus.plexus.context.DefaultContext;
  import org.junit.After;
  import org.junit.Before;
  
  import static org.junit.Assert.fail;
  
  /**
   * Based on PlexusTestCase from org.sonatype.sisu:sisu-inject-plexus
   *
   * @author Robert Scholte
   */
  public abstract class PlexusJUnit4TestCase {
      private PlexusContainer container;
  
      private static String basedir;
  
      @Before
      public void setUp() throws Exception {
          basedir = getBasedir();
      }
  
      protected void setupContainer() {
          // ----------------------------------------------------------------------------
          // Context Setup
          // ----------------------------------------------------------------------------
  
          final DefaultContext context = new DefaultContext();
  
          context.put("basedir", getBasedir());
  
          customizeContext(context);
  
          final boolean hasPlexusHome = context.contains("plexus.home");
  
          if (!hasPlexusHome) {
              final File f = getTestFile("target/plexus-home");
  
              if (!f.isDirectory()) {
                  f.mkdir();
              }
  
              context.put("plexus.home", f.getAbsolutePath());
          }
  
          // ----------------------------------------------------------------------------
          // Configuration
          // ----------------------------------------------------------------------------
  
          final String config = getCustomConfigurationName();
  
          final ContainerConfiguration containerConfiguration = new DefaultContainerConfiguration()
                  .setName("test")
                  .setContext(context.getContextData())
                  .setAutoWiring(true)
                  .setClassPathScanning(PlexusConstants.SCANNING_CACHE);
  
          if (config != null) {
              containerConfiguration.setContainerConfiguration(config);
          } else {
              final String resource = getConfigurationName(null);
  
             containerConfiguration.setContainerConfiguration(resource);
         }
 
         customizeContainerConfiguration(containerConfiguration);
 
         try {
             container = new DefaultPlexusContainer(containerConfiguration, getCustomModules());
         } catch (final PlexusContainerException e) {
             e.printStackTrace();
             fail("Failed to create plexus container.");
         }
     }
 
     /**
      * Allows test to define custom modules.
      */
     protected Module[] getCustomModules() {
         return new Module[] {
             new AbstractModule() {
                 @Override
                 protected void configure() {
                     bind(ScmManager.class).to(ScmManagerStub.class).in(Singleton.class);
                 }
             }
         };
     }
 
     /**
      * Allow custom test case implementations do augment the default container configuration before executing tests.
      *
      * @param containerConfiguration
      */
     protected void customizeContainerConfiguration(final ContainerConfiguration containerConfiguration) {}
 
     protected void customizeContext(final Context context) {}
 
     protected PlexusConfiguration customizeComponentConfiguration() {
         return null;
     }
 
     @After
     public void tearDown() throws Exception {
         if (container != null) {
             container.dispose();
 
             container = null;
         }
     }
 
     protected PlexusContainer getContainer() {
         if (container == null) {
             setupContainer();
         }
 
         return container;
     }
 
     protected InputStream getConfiguration() throws Exception {
         return getConfiguration(null);
     }
 
     @SuppressWarnings("unused")
     protected InputStream getConfiguration(final String subname) throws Exception {
         return getResourceAsStream(getConfigurationName(subname));
     }
 
     protected String getCustomConfigurationName() {
         return null;
     }
 
     /**
      * Allow the retrieval of a container configuration that is based on the name of the test class being run. So if you
      * have a test class called org.foo.FunTest, then this will produce a resource name of org/foo/FunTest.xml which
      * would be used to configure the Plexus container before running your test.
      *
      * @param subname
      * @return
      */
     protected String getConfigurationName(final String subname) {
         return getClass().getName().replace('.', '/') + ".xml";
     }
 
     protected InputStream getResourceAsStream(final String resource) {
         return getClass().getResourceAsStream(resource);
     }
 
     protected ClassLoader getClassLoader() {
         return getClass().getClassLoader();
     }
 
     // ----------------------------------------------------------------------
     // Container access
     // ----------------------------------------------------------------------
 
     protected Object lookup(final String componentKey) throws Exception {
         return getContainer().lookup(componentKey);
     }
 
     protected Object lookup(final String role, final String roleHint) throws Exception {
         return getContainer().lookup(role, roleHint);
     }
 
     protected <T> T lookup(final Class<T> componentClass) throws Exception {
         return getContainer().lookup(componentClass);
     }
 
     protected <T> T lookup(final Class<T> componentClass, final String roleHint) throws Exception {
         return getContainer().lookup(componentClass, roleHint);
     }
 
     protected <T> Map<String, T> lookupMap(final Class<T> componentClass) throws Exception {
         return getContainer().lookupMap(componentClass);
     }
 
     protected void release(final Object component) throws Exception {
         getContainer().release(component);
     }
 
     // ----------------------------------------------------------------------
     // Helper methods for sub classes
     // ----------------------------------------------------------------------
 
     public static File getTestFile(final String path) {
         return new File(getBasedir(), path);
     }
 
     @SuppressWarnings("hiding")
     public static File getTestFile(final String basedir, final String path) {
         File basedirFile = new File(basedir);
 
         if (!basedirFile.isAbsolute()) {
             basedirFile = getTestFile(basedir);
         }
 
         return new File(basedirFile, path);
     }
 
     public static String getTestPath(final String path) {
         return getTestFile(path).getAbsolutePath();
     }
 
     @SuppressWarnings("hiding")
     public static String getTestPath(final String basedir, final String path) {
         return getTestFile(basedir, path).getAbsolutePath();
     }
 
     public static String getBasedir() {
         if (basedir != null) {
             return basedir;
         }
 
         basedir = System.getProperty("basedir");
 
         if (basedir == null) {
             basedir = new File("").getAbsolutePath();
         }
 
         return basedir;
     }
 
     public String getTestConfiguration() {
         return getTestConfiguration(getClass());
     }
 
     public static String getTestConfiguration(final Class<?> clazz) {
         final String s = clazz.getName().replace('.', '/');
 
         return s.substring(0, s.indexOf("$")) + ".xml";
     }
 }