/*
    * 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.buildcache.xml;
  
  import javax.inject.Named;
  import javax.inject.Singleton;
  
  import java.io.ByteArrayInputStream;
  import java.io.ByteArrayOutputStream;
  import java.io.File;
  import java.io.IOException;
  import java.io.InputStream;
  import java.nio.file.Files;
  
  import org.apache.maven.buildcache.xml.build.Build;
  import org.apache.maven.buildcache.xml.build.io.xpp3.BuildCacheBuildXpp3Reader;
  import org.apache.maven.buildcache.xml.build.io.xpp3.BuildCacheBuildXpp3Writer;
  import org.apache.maven.buildcache.xml.config.CacheConfig;
  import org.apache.maven.buildcache.xml.config.io.xpp3.BuildCacheConfigXpp3Reader;
  import org.apache.maven.buildcache.xml.config.io.xpp3.BuildCacheConfigXpp3Writer;
  import org.apache.maven.buildcache.xml.diff.Diff;
  import org.apache.maven.buildcache.xml.diff.io.xpp3.BuildCacheDiffXpp3Reader;
  import org.apache.maven.buildcache.xml.diff.io.xpp3.BuildCacheDiffXpp3Writer;
  import org.apache.maven.buildcache.xml.report.CacheReport;
  import org.apache.maven.buildcache.xml.report.io.xpp3.BuildCacheReportXpp3Reader;
  import org.apache.maven.buildcache.xml.report.io.xpp3.BuildCacheReportXpp3Writer;
  import org.codehaus.plexus.util.xml.pull.XmlPullParserException;
  
  /**
   * XmlService
   */
  @Singleton
  @Named
  public class XmlService {
  
      public byte[] toBytes(CacheConfig cache) throws IOException {
          try (ByteArrayOutputStream baos = new ByteArrayOutputStream()) {
              new BuildCacheConfigXpp3Writer().write(baos, cache);
              return baos.toByteArray();
          }
      }
  
      public byte[] toBytes(Build build) throws IOException {
          try (ByteArrayOutputStream baos = new ByteArrayOutputStream()) {
              new BuildCacheBuildXpp3Writer().write(baos, build);
              return baos.toByteArray();
          }
      }
  
      public byte[] toBytes(Diff diff) throws IOException {
          try (ByteArrayOutputStream baos = new ByteArrayOutputStream()) {
              new BuildCacheDiffXpp3Writer().write(baos, diff);
              return baos.toByteArray();
          }
      }
  
      public byte[] toBytes(CacheReport cacheReportType) throws IOException {
          try (ByteArrayOutputStream baos = new ByteArrayOutputStream()) {
              new BuildCacheReportXpp3Writer().write(baos, cacheReportType);
              return baos.toByteArray();
          }
      }
  
      public Build loadBuild(File file) throws IOException {
          return fromFile(Build.class, file);
      }
  
      public Build loadBuild(byte[] bytes) {
          return fromBytes(Build.class, bytes);
      }
  
      public Build loadBuild(InputStream inputStream) {
          return fromInputStream(Build.class, inputStream);
      }
  
      public CacheConfig loadCacheConfig(File file) throws IOException {
          return fromFile(CacheConfig.class, file);
      }
  
      public CacheConfig loadCacheConfig(byte[] bytes) {
          return fromBytes(CacheConfig.class, bytes);
      }
  
     public CacheConfig loadCacheConfig(InputStream inputStream) {
         return fromInputStream(CacheConfig.class, inputStream);
     }
 
     public CacheReport loadCacheReport(File file) throws IOException {
         return fromFile(CacheReport.class, file);
     }
 
     public CacheReport loadCacheReport(byte[] bytes) {
         return fromBytes(CacheReport.class, bytes);
     }
 
     public CacheReport loadCacheReport(InputStream inputStream) {
         return fromInputStream(CacheReport.class, inputStream);
     }
 
     public Diff loadDiff(File file) throws IOException {
         return fromFile(Diff.class, file);
     }
 
     public Diff loadDiff(byte[] bytes) {
         return fromBytes(Diff.class, bytes);
     }
 
     public Diff loadDiff(InputStream inputStream) {
         return fromInputStream(Diff.class, inputStream);
     }
 
     private <T> T fromFile(Class<T> clazz, File file) throws IOException {
         return fromInputStream(clazz, Files.newInputStream(file.toPath()));
     }
 
     private <T> T fromBytes(Class<T> clazz, byte[] bytes) {
         return fromInputStream(clazz, new ByteArrayInputStream(bytes));
     }
 
     private <T> T fromInputStream(Class<T> clazz, InputStream inputStream) {
         try {
             if (clazz == Build.class) {
                 return clazz.cast(new BuildCacheBuildXpp3Reader().read(inputStream));
             } else if (clazz == CacheConfig.class) {
                 return clazz.cast(new BuildCacheConfigXpp3Reader().read(inputStream));
             } else if (clazz == Diff.class) {
                 return clazz.cast(new BuildCacheDiffXpp3Reader().read(inputStream));
             } else if (clazz == CacheReport.class) {
                 return clazz.cast(new BuildCacheReportXpp3Reader().read(inputStream));
             } else {
                 throw new IllegalArgumentException("Unsupported type " + clazz);
             }
         } catch (IOException | XmlPullParserException e) {
             throw new RuntimeException("Unable to parse cache xml element", e);
         } finally {
             closeQuietly(inputStream);
         }
     }
 
     private void closeQuietly(InputStream inputStream) {
         try {
             inputStream.close();
         } catch (IOException e) {
             // ignore
         }
     }
 }