/*
  *

  *   Copyright (C) 2020, University of the Basque Country (UPV/EHU)

  *
  *  Contact for licensing options: <licensing-mcpttclient(at)mcopenplatform(dot)com>
  *
  *  This file is part of MCOP MCPTT Client
  *
  *  This is free software: you can redistribute it and/or modify it under the terms of
  *  the GNU General Public License as published by the Free Software Foundation, either version 3
  *  of the License, or (at your option) any later version.
  *
  *  This is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
  *  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  *  See the GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
  *  with this program; if not, write to the Free Software Foundation, Inc.,
  *  59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  */
 
 
 
 package org.doubango.ngn.services.impl.ms;
 
 
 import android.content.Context;
 

 import org.doubango.ngn.datatype.ms.gms.ns.list_service.Group;
 import org.doubango.ngn.datatype.ms.gms.ns.resource_lists.ResourceLists;

 import org.simpleframework.xml.Serializer;
 import org.simpleframework.xml.convert.AnnotationStrategy;
 import org.simpleframework.xml.core.Persister;
 import org.simpleframework.xml.strategy.Strategy;
 
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.util.Calendar;
 
 class GMSUtils {
 
     //INIT group
 
     protected static Group getGroupConfiguration(String string) throws Exception {
         return getGroupConfiguration(string.getBytes());
     }
 
     private static Group getGroupConfiguration(byte[] bytes) throws Exception {
         return getGroupConfiguration(new ByteArrayInputStream(bytes));
     }
     private static Group getGroupConfiguration(InputStream stream) throws Exception {
         if(stream==null)return null;
         Strategy strategy = new AnnotationStrategy();
         Serializer serializer = new Persister(strategy);
         return serializer.read(Group.class,stream);
     }
 
 
     private static InputStream getOutputStreamOfGroupConfiguration(Context context, Group groupConfiguration) throws Exception {
         if(groupConfiguration==null)return null;
         Strategy strategy = new AnnotationStrategy();
         Serializer serializer = new Persister(strategy);
         File outputDir = context.getCacheDir(); // context being the Activity pointer
         File outputFile = File.createTempFile(String.valueOf(Calendar.getInstance().getTimeInMillis()), "txt", outputDir);
         serializer.write(groupConfiguration,outputFile);
         return new FileInputStream(outputFile);
     }
 
     private static byte[] getBytesOfGroupConfiguration(Context context,Group groupConfiguration) throws Exception {
         InputStream inputStream=getOutputStreamOfGroupConfiguration(context,groupConfiguration);
         if(inputStream==null)return null;
         return readBytes(inputStream);
     }
 
     public  static String  getStringOfGroupConfiguration(Context context,Group groupConfiguration) throws Exception {
         return new String(getBytesOfGroupConfiguration(context,groupConfiguration)).trim();
     }

     //END group

     //INIT resoult-list
 
     protected static ResourceLists getResourceLists(String string) throws Exception {
         return getResourceLists(string.getBytes());
     }
 
     private static ResourceLists getResourceLists(byte[] bytes) throws Exception {
         return getResourceLists(new ByteArrayInputStream(bytes));
     }
     private static ResourceLists getResourceLists(InputStream stream) throws Exception {
         if(stream==null)return null;
         Strategy strategy = new AnnotationStrategy();
         Serializer serializer = new Persister(strategy);
         return serializer.read(ResourceLists.class,stream);
     }
 
 
     private static InputStream getOutputStreamOfResourceLists(Context context, ResourceLists resourceLists) throws Exception {
         if(resourceLists==null)return null;
         Strategy strategy = new AnnotationStrategy();
         Serializer serializer = new Persister(strategy);
         File outputDir = context.getCacheDir(); // context being the Activity pointer
         File outputFile = File.createTempFile(String.valueOf(Calendar.getInstance().getTimeInMillis()), "txt", outputDir);
         serializer.write(resourceLists,outputFile);
         return new FileInputStream(outputFile);
     }
 
     private static byte[] getBytesStreamOfResourceLists(Context context,ResourceLists resourceLists) throws Exception {
         InputStream inputStream=getOutputStreamOfResourceLists(context,resourceLists);
         if(inputStream==null)return null;
         return readBytes(inputStream);
     }
 
     public  static String  getStringOfResourceLists(Context context,ResourceLists resourceLists) throws Exception {
         return new String(getBytesStreamOfResourceLists(context,resourceLists)).trim();
     }
     //END resoult-list

 
     private static byte[] readBytes(InputStream inputStream) throws IOException {
 
         ByteArrayOutputStream byteBuffer = new ByteArrayOutputStream();
 
 
         int bufferSize = 1024;
         byte[] buffer = new byte[bufferSize];
 
 
         int len = 0;
         while ((len = inputStream.read(buffer)) != -1) {
             byteBuffer.write(buffer, 0, len);
         }
 
 
         return byteBuffer.toByteArray();
     }
 }