/*
    * 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.surefire.api.util;
  
  import java.io.File;
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.LinkedHashSet;
  import java.util.List;
  import java.util.Set;
  
  import org.apache.maven.surefire.api.filter.SpecificTestClassFilter;
  
  /**
   * Scans directories looking for tests.
   *
   * @author Karl M. Davis
   * @author Kristian Rosenvold
   */
  @Deprecated
  public class DefaultDirectoryScanner implements DirectoryScanner {
  
      private static final String FS = System.getProperty("file.separator");
  
      private static final String[] EMPTY_STRING_ARRAY = new String[0];
  
      private static final String JAVA_SOURCE_FILE_EXTENSION = ".java";
  
      private static final String JAVA_CLASS_FILE_EXTENSION = ".class";
  
      private final File basedir;
  
      private final List<String> includes;
  
      private final List<String> excludes;
  
      private final List<String> specificTests;
  
      public DefaultDirectoryScanner(
              File basedir, List<String> includes, List<String> excludes, List<String> specificTests) {
          this.basedir = basedir;
          this.includes = includes;
          this.excludes = excludes;
          this.specificTests = specificTests;
      }
  
      @Override
      public TestsToRun locateTestClasses(ClassLoader classLoader, ScannerFilter scannerFilter) {
          String[] testClassNames = collectTests();
          Set<Class<?>> result = new LinkedHashSet<>();
  
          String[] specific = specificTests == null ? new String[0] : processIncludesExcludes(specificTests);
          SpecificTestClassFilter specificTestFilter = new SpecificTestClassFilter(specific);
  
          for (String className : testClassNames) {
              Class<?> testClass = loadClass(classLoader, className);
  
              if (!specificTestFilter.accept(testClass)) {
                  // FIXME: Log this somehow!
                  continue;
              }
  
              if (scannerFilter == null || scannerFilter.accept(testClass)) {
                  result.add(testClass);
              }
          }
  
          return new TestsToRun(result);
      }
  
      private static Class<?> loadClass(ClassLoader classLoader, String className) {
          try {
              return classLoader.loadClass(className);
          } catch (ClassNotFoundException e) {
              throw new RuntimeException("Unable to create test class '" + className + "'", e);
          }
      }
  
      String[] collectTests() {
          String[] tests = EMPTY_STRING_ARRAY;
          if (basedir.exists()) {
              org.apache.maven.surefire.shared.utils.io.DirectoryScanner scanner =
                      new org.apache.maven.surefire.shared.utils.io.DirectoryScanner();
 
             scanner.setBasedir(basedir);
 
             if (includes != null) {
                 scanner.setIncludes(processIncludesExcludes(includes));
             }
 
             if (excludes != null) {
                 scanner.setExcludes(processIncludesExcludes(excludes));
             }
 
             scanner.scan();
 
             tests = scanner.getIncludedFiles();
             for (int i = 0; i < tests.length; i++) {
                 String test = tests[i];
                 test = test.substring(0, test.indexOf("."));
                 tests[i] = test.replace(FS.charAt(0), '.');
             }
         }
         return tests;
     }
 
     private static String[] processIncludesExcludes(List<String> list) {
         List<String> newList = new ArrayList<>();
         for (String include : list) {
             String[] includes = include.split(",");
             Collections.addAll(newList, includes);
         }
 
         String[] incs = new String[newList.size()];
 
         for (int i = 0; i < incs.length; i++) {
             String inc = newList.get(i);
             if (inc.endsWith(JAVA_SOURCE_FILE_EXTENSION)) {
                 inc = inc.substring(0, inc.lastIndexOf(JAVA_SOURCE_FILE_EXTENSION)) + JAVA_CLASS_FILE_EXTENSION;
             }
             incs[i] = inc;
         }
         return incs;
     }
 }