package org.apache.rat.mp;
   
   /*
    * 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.
   */
  
  import org.apache.commons.io.IOUtils;
  import org.apache.maven.artifact.factory.ArtifactFactory;
  import org.apache.maven.artifact.factory.DefaultArtifactFactory;
  import org.apache.maven.artifact.repository.ArtifactRepository;
  import org.apache.maven.artifact.repository.DefaultArtifactRepository;
  import org.apache.maven.artifact.repository.layout.ArtifactRepositoryLayout;
  import org.apache.maven.artifact.resolver.ArtifactResolver;
  import org.apache.maven.artifact.resolver.DefaultArtifactResolver;
  import org.apache.maven.doxia.siterenderer.Renderer;
  import org.apache.maven.settings.Settings;
  import org.apache.maven.settings.io.xpp3.SettingsXpp3Reader;
  import org.codehaus.plexus.PlexusContainer;
  import org.codehaus.plexus.util.DirectoryScanner;
  
  import java.io.BufferedReader;
  import java.io.File;
  import java.io.FileInputStream;
  import java.io.FileNotFoundException;
  import java.io.FileOutputStream;
  import java.io.FileReader;
  import java.io.IOException;
  import java.lang.reflect.InvocationHandler;
  import java.lang.reflect.Method;
  import java.lang.reflect.Proxy;
  
  /**
   * Test helpers used when verifying mojo interaction in RAT integration tests.
   */
  public final class RatTestHelpers {
  
      /**
       * @param pDir Removes the given directory recursively.
       * @throws IOException in case of errors.
       */
      public static void remove(File pDir) throws IOException {
          if (pDir.isFile()) {
              if (!pDir.delete()) {
                  throw new IOException("Unable to delete file: " + pDir);
              }
          } else if (pDir.isDirectory()) {
              final File[] files = pDir.listFiles();
              if (files != null) {
                  for (File file : files) {
                      remove(file);
                  }
              }
              if (!pDir.delete()) {
                  throw new IOException("Unable to delete directory: " + pDir);
              }
          } else if (pDir.exists()) {
              throw new IOException("Unable to delete unknown object " + pDir);
          }
      }
  
      /**
       * Copies the given files recursively in order to get all integration test
       * files into a target directory.
       *
       * @param pSource source files.
       * @param pTarget target directory
       * @throws IOException in case of errors.
       */
      public static void copy(File pSource, File pTarget) throws IOException {
          if (pSource.isDirectory()) {
              if (!pTarget.isDirectory() && !pTarget.mkdirs()) {
                  throw new IOException("Unable to create directory: " + pTarget);
              }
              final DirectoryScanner scanner = new DirectoryScanner();
              scanner.setBasedir(pSource);
              scanner.addDefaultExcludes();
              scanner.setIncludes(new String[]{"*"});
              scanner.scan();
              final String[] dirs = scanner.getIncludedDirectories();
  
              for (final String dir : dirs) {
                  if (!"".equals(dir)) {
                      copy(new File(pSource, dir), new File(pTarget, dir));
                  }
              }
              final String[] files = scanner.getIncludedFiles();
             for (String file : files) {
                 copy(new File(pSource, file), new File(pTarget, file));
             }
         } else if (pSource.isFile()) {
             final FileInputStream fis = new FileInputStream(pSource);
             final FileOutputStream fos = new FileOutputStream(pTarget);
             final byte[] buffer = new byte[8192];
             for (; ; ) {
                 int res = fis.read(buffer);
                 if (res == -1) {
                     break;
                 }
                 if (res > 0) {
                     fos.write(buffer, 0, res);
                 }
             }
             fos.close();
             fis.close();
         } else {
             throw new IOException("Unable to copy unknown object " + pSource);
         }
     }
 
     /**
      * Creates a new instance of {@link Renderer}.
      *
      * @param container current plexus container.
      * @return A configured instance of a Default renderer.
      * @throws Exception Creating the object failed.
      */
     public static Renderer newSiteRenderer(PlexusContainer container)
             throws Exception {
         return (Renderer) container.lookup(Renderer.ROLE, "default");
     }
 
     /**
      * Creates a new instance of {@link ArtifactFactory}.
      *
      * @return A configured instance of {@link DefaultArtifactFactory}.
      * @throws Exception Creating the object failed.
      */
     public static ArtifactFactory newArtifactFactory() throws Exception {
         final InvocationHandler handler = new InvocationHandler() {
             public Object invoke(Object pProxy, Method pMethod, Object[] pArgs)
                     throws Throwable {
                 System.out.println("Invoking method " + pMethod);
                 throw new IllegalStateException("Not implemented");
             }
         };
         return (ArtifactFactory) Proxy.newProxyInstance(Thread.currentThread()
                         .getContextClassLoader(),
                 new Class[]{ArtifactFactory.class}, handler);
     }
 
     /**
      * Creates a new instance of {@link ArtifactResolver}.
      *
      * @return A configured instance of {@link DefaultArtifactResolver}.
      * @throws Exception Creating the object failed.
      */
     public static ArtifactResolver newArtifactResolver() throws Exception {
         final InvocationHandler handler = new InvocationHandler() {
             public Object invoke(Object pProxy, Method pMethod, Object[] pArgs)
                     throws Throwable {
                 System.out.println("Invoking method " + pMethod);
                 throw new IllegalStateException("Not implemented");
             }
         };
         return (ArtifactResolver) Proxy.newProxyInstance(Thread.currentThread()
                         .getContextClassLoader(),
                 new Class[]{ArtifactResolver.class}, handler);
     }
 
     /**
      * Creates an instance of {@link ArtifactRepository}.
      *
      * @param container current plexus container.
      * @return A configured instance of {@link DefaultArtifactRepository}.
      * @throws Exception Creating the object failed.
      */
     public static ArtifactRepository newArtifactRepository(
             PlexusContainer container) throws Exception {
         File m2Dir = new File(System.getProperty("user.home"), ".m2");
         File settingsFile = new File(m2Dir, "settings.xml");
         String localRepo = null;
         if (settingsFile.exists()) {
             Settings settings = new SettingsXpp3Reader().read(new FileReader(
                     settingsFile));
             localRepo = settings.getLocalRepository();
         }
         if (localRepo == null) {
             localRepo = System.getProperty("user.home") + "/.m2/repository";
         }
         ArtifactRepositoryLayout repositoryLayout = (ArtifactRepositoryLayout) container
                 .lookup(ArtifactRepositoryLayout.ROLE, "default");
         return new DefaultArtifactRepository("local", "file://" + localRepo,
                 repositoryLayout);
     }
 
     public static File makeSourceDirectory(String mvnBaseDir, File pFile,
                                            String pDir, boolean pCreateCopy) throws IOException {
         if (!pCreateCopy) {
             return pFile;
         }
 
         final File targetDir = new File(new File(new File(mvnBaseDir),
                 "target/it-source"), pDir);
         remove(targetDir);
         copy(pFile, targetDir);
         return targetDir;
     }
 
     public static File getSourceDirectory(String mvnBaseDir, String pDir,
                                           boolean pCreateCopy, final File baseDir) throws IOException {
         return makeSourceDirectory(mvnBaseDir, new File(new File(baseDir,
                 "src/test/resources/unit"), pDir), pDir, pCreateCopy);
     }
 
     /**
      * Reads the created report file and verifies, whether the detected numbers
      * are matching.
      *
      * @param pRatTxtFile        The file to read.
      * @param pNumALFiles        The number of files with AL.
      * @param pNumNoLicenseFiles The number of files without license.
      * @throws IOException              An error occurred while reading the file or the file does not
      *                                  exist at all.
      * @throws IllegalArgumentException In case of mismatches in file numbers passed in as parameter.
      */
     public static void ensureRatReportIsCorrect(File pRatTxtFile,
                                                 int pNumALFiles, int pNumNoLicenseFiles) throws IOException {
         if (!pRatTxtFile.exists()) {
             throw new FileNotFoundException("Could not find " + pRatTxtFile);
         }
         BufferedReader reader = null;
         try {
 
             reader = new BufferedReader(new FileReader(pRatTxtFile));
             Integer numALFiles = null;
             Integer numNoLicenseFiles = null;
             for (; ; ) {
                 String line = reader.readLine();
                 if (line == null) {
                     break;
                 }
                 int offset = line.indexOf("Apache Licensed: ");
                 if (offset >= 0) {
                     numALFiles = new Integer(line.substring(
                             offset + "Apache Licensed: ".length()).trim());
                 }
                 offset = line.indexOf("Unknown Licenses");
                 if (offset >= 0) {
                     numNoLicenseFiles = new Integer(line.substring(0, offset)
                             .trim());
                 }
             }
             reader.close();
 
             if (!new Integer(pNumALFiles).equals(numALFiles)) {
                 throw new IllegalArgumentException(
                         "Amount of licensed files does not match. Expected "
                                 + pNumALFiles + ", got " + numALFiles);
             }
 
             if (!new Integer(pNumNoLicenseFiles).equals(numNoLicenseFiles)) {
                 throw new IllegalArgumentException(
                         "Amount of licensed files does not match. Expected "
                                 + pNumALFiles + ", got " + numALFiles);
             }
         } finally {
             IOUtils.closeQuietly(reader);
         }
 
     }
 
 }