/*
    * #%L
    * xcode-maven-plugin
    * %%
    * Copyright (C) 2012 SAP AG
    * %%
    * Licensed 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.
   * #L%
   */
  package com.sap.prd.mobile.ios.mios;
  
  import java.io.File;
  import java.io.FileFilter;
  import java.io.IOException;
  import java.util.Arrays;
  import java.util.HashSet;
  import java.util.Properties;
  import java.util.Set;
  
  import org.apache.commons.io.FileUtils;
  
  public class XCodeTest
  {
    protected void ensureCleanProjectDirectoryAndFilterPom(final File projectDirectory) throws Exception
    {
      File source = new File(new File(".").getAbsoluteFile(), "src/test/projects");
  
      MacFileUtil.deleteDirectory(projectDirectory);
      FileUtils.copyDirectory(source, projectDirectory);
      filterPoms(projectDirectory);
    }
  
    private static void filterPoms(File projectDirectory) throws IOException
    {
      Set<File> pomFiles = new HashSet<File>();
      getPomFiles(projectDirectory, pomFiles);
  
      for (File pomFile : pomFiles) {
        String pom = FileUtils.readFileToString(pomFile);
        pom = pom.replaceAll("\\$\\{xcode.maven.plugin.version\\}", getMavenXcodePluginVersion());
        FileUtils.writeStringToFile(pomFile, pom, "UTF-8");
      }
    }
  
    private static void getPomFiles(File root, final Set<File> pomFiles)
    {
      if (root.isFile())
        return;
  
      pomFiles.addAll(Arrays.asList(root.listFiles(new FileFilter() {
  
        @Override
        public boolean accept(File f)
        {
          // here we have the implicit assumtion that a pom file is named "pom.xml".
          // In case we introduce any test with a diffent name for a pom file we have
          // to revisit that.
          return f.isFile() && f.getName().equals("pom.xml");
        }
  
      })));
  
      for (File f : Arrays.asList(root.listFiles(new FileFilter() {
  
        @Override
        public boolean accept(File f)
        {
          return f.isDirectory();
        }
      })))
        getPomFiles(f, pomFiles);
    }
  
    private static String getMavenXcodePluginVersion() throws IOException
    {
      Properties properties = new Properties();
      properties.load(XCodeManagerTest.class.getResourceAsStream("/misc/project.properties"));
      final String xcodePluginVersion = properties.getProperty("xcode-plugin-version");
  
      if (xcodePluginVersion.equals("${project.version}"))
        throw new IllegalStateException(
              "Variable ${project.version} was not replaced. May be running \"mvn clean install\" beforehand might solve this issue.");
      return xcodePluginVersion;
    }
  
  }