/*
    * #%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.ByteArrayOutputStream;
  import java.io.File;
  import java.io.PrintStream;
  import java.nio.charset.Charset;
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  import org.apache.commons.io.IOUtils;
  import org.apache.maven.artifact.versioning.DefaultArtifactVersion;
  
  public class XCodeVersionUtil
  {
  
    public static String getXCodeVersionString() throws XCodeException
    {
      PrintStream out = null;
      try {
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        out = new PrintStream(bos, true, Charset.defaultCharset().name());
        int exitCode = Forker.forkProcess(out, new File("."), new String[] { "xcodebuild", "-version" });
        if (exitCode == 0) {
          return bos.toString(Charset.defaultCharset().name());
        }
        else {
          throw new XCodeException(
                "Could not get xcodebuild version (exit code = " + exitCode + ")");
        }
      }
      catch (Exception e) {
        throw new XCodeException(
              "Could not get xcodebuild version");
      }
      finally {
        IOUtils.closeQuietly(out);
      }
    }
  
    public static DefaultArtifactVersion getVersion(String xCodeVersionString) throws XCodeException
    {
      Pattern versionPattern = Pattern.compile("Xcode (\\d+(\\.\\d+)+)", Pattern.CASE_INSENSITIVE);
      Matcher versionMatcher = versionPattern.matcher(xCodeVersionString);
      if (versionMatcher.find()) {
        return new DefaultArtifactVersion(versionMatcher.group(1));
      }
      throw new XCodeException("Could not get xcodebuild version");
    }
    
    public static String getBuildVersion(String xCodeVersionString) throws XCodeException
    {
      Pattern buildPattern = Pattern.compile("Build version (\\w+)", Pattern.CASE_INSENSITIVE);
      Matcher buildMatcher = buildPattern.matcher(xCodeVersionString);
      if (buildMatcher.find()) {
        return buildMatcher.group(1);
      }
      throw new XCodeException("Could not get xcodebuild build version");
    }
    
  
    public static boolean checkVersions(DefaultArtifactVersion version, final String MIN_XCODE_VERSION)
    {
      DefaultArtifactVersion minXcodeVersion = new DefaultArtifactVersion(MIN_XCODE_VERSION);
      return version.compareTo(minXcodeVersion) >= 0;
    }
    
  }