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/*
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 *  BACKENDLESS.COM CONFIDENTIAL
 *  

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 *  Copyright 2012 BACKENDLESS.COM. All Rights Reserved.
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 *  NOTICE: All information contained herein is, and remains the property of Backendless.com and its suppliers,
 *  if any. The intellectual and technical concepts contained herein are proprietary to Backendless.com and its
 *  suppliers and may be covered by U.S. and Foreign Patents, patents in process, and are protected by trade secret
 *  or copyright law. Dissemination of this information or reproduction of this material is strictly forbidden
 *  unless prior written permission is obtained from Backendless.com.
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package com.backendless.utils;


import com.backendless.Persistence;
import com.backendless.core.responder.AdaptingResponder;
import com.backendless.core.responder.policy.CollectionAdaptingPolicy;
import com.backendless.core.responder.policy.DecoratorCachingAdaptingPolicy;
import com.backendless.core.responder.policy.GroupResultAdaptingPolicy;
import com.backendless.core.responder.policy.IAdaptingPolicy;
import com.backendless.core.responder.policy.PoJoAdaptingPolicy;
import com.backendless.core.responder.policy.SetAdaptingPolicy;
import com.backendless.exceptions.BackendlessException;
import com.backendless.exceptions.ExceptionMessage;
import com.backendless.persistence.BackendlessSerializer;

import java.util.Date;

public class ResponderHelper
{
  public static  AdaptingResponder getCollectionAdaptingResponder( Class entity )
  {
    entity = BackendlessSerializer.getClassForDeserialization( entity );
    return getAdaptingResponder( entity, new CollectionAdaptingPolicy() );
  }

  public static  AdaptingResponder getSetAdaptingResponder( Class entity )
  {
    entity = BackendlessSerializer.getClassForDeserialization( entity );
    return getAdaptingResponder( entity, new SetAdaptingPolicy() );
  }

  public static  AdaptingResponder getGroupResultAdaptingResponder( Class entity )
  {
    entity = BackendlessSerializer.getClassForDeserialization( entity );
    return getAdaptingResponder( entity, new GroupResultAdaptingPolicy() );
  }

  public static   AdaptingResponder getPOJOAdaptingResponder( Class entity )
  {
    entity = BackendlessSerializer.getClassForDeserialization( entity );
    return getAdaptingResponder( entity, new PoJoAdaptingPolicy() );
  }

  public static  AdaptingResponder getAdaptingResponder( Class entity, IAdaptingPolicy policy )
  {
    if( needsPhantomCache( entity ) )
      policy = new DecoratorCachingAdaptingPolicy<>( policy );

    return new AdaptingResponder<>( entity, policy );
  }

  public static  boolean needsPhantomCache( Class entityClass ) throws BackendlessException
  {
    try
    {
      if( !entityClass.getField( Persistence.DEFAULT_OBJECT_ID_FIELD ).getType().equals( String.class ) )
        throw new IllegalArgumentException( ExceptionMessage.ENTITY_WRONG_OBJECT_ID_FIELD_TYPE );

      if( !entityClass.getField( Persistence.DEFAULT_META_FIELD ).getType().equals( String.class ) )
        throw new IllegalArgumentException( ExceptionMessage.ENTITY_WRONG_META_FIELD_TYPE );

      if( !entityClass.getField( Persistence.DEFAULT_CREATED_FIELD ).getType().equals( Date.class ) )
        throw new IllegalArgumentException( ExceptionMessage.ENTITY_WRONG_CREATED_FIELD_TYPE );

      if( !entityClass.getField( Persistence.DEFAULT_UPDATED_FIELD ).getType().equals( Date.class ) )
        throw new IllegalArgumentException( ExceptionMessage.ENTITY_WRONG_UPDATED_FIELD_TYPE );
    }
    catch( NoSuchFieldException e )
    {
      return true;
    }

    return false;
  }
}