#ifndef OPENMM_BROOKPLATFORM_H_
#define OPENMM_BROOKPLATFORM_H_

/* -------------------------------------------------------------------------- *
 *                                   OpenMM                                   *
 * -------------------------------------------------------------------------- *
 * This is part of the OpenMM molecular simulation toolkit originating from   *
 * Simbios, the NIH National Center for Physics-Based Simulation of           *
 * Biological Structures at Stanford, funded under the NIH Roadmap for        *
 * Medical Research, grant U54 GM072970. See https://simtk.org.               *
 *                                                                            *
 * Portions copyright (c) 2008 Stanford University and the Authors.           *
 * Authors: Peter Eastman, Mark Friedrichs                                    *
 * Contributors:                                                              *
 *                                                                            *
 * Permission is hereby granted, free of charge, to any person obtaining a    *
 * copy of this software and associated documentation files (the "Software"), *
 * to deal in the Software without restriction, including without limitation  *
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,   *
 * and/or sell copies of the Software, and to permit persons to whom the      *
 * Software is furnished to do so, subject to the following conditions:       *
 *                                                                            *
 * The above copyright notice and this permission notice shall be included in *
 * all copies or substantial portions of the Software.                        *
 *                                                                            *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,   *
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL    *
 * THE AUTHORS, CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,    *
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR      *
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE  *
 * USE OR OTHER DEALINGS IN THE SOFTWARE.                                     *
 * -------------------------------------------------------------------------- */

// default float size for Brook

#define BrookOpenMMFloat float

#include "openmm/Platform.h"
#include "BrookStreamFactory.h"

namespace OpenMM {

class KernelImpl;
class OpenMMBrookInterface;

class BrookPlatformData {

   public:

      /** 
       * Constructor
       * 
       */
      
      BrookPlatformData( void );

      /** 
       * Destructor
       * 
       */
      
      ~BrookPlatformData( void );

      /** 
       * Get _removeCOM flag
       * 
       * @return  _removeCOM
       *
       */
      
      int removeCOM( void ) const;

      /** 
       * Get _useOBC flag
       * 
       * @return  _useOBC
       *
       */
      
      int useOBC( void ) const;
      
      /** 
       * Get _hasBonds flag
       * 
       * @return  _hasBonds 
       *
       */
      
      int hasBonds( void ) const;
      
      /** 
       * Get _hasAngles
       * 
       * @return  _hasAngles
       *
       */
      
      int hasAngles( void ) const;
      
      /** 
       * Get _hasPeriodicTorsions
       * 
       * @return  _hasPeriodicTorsions
       *
       */
      
      int hasPeriodicTorsions( void ) const;
      
      /** 
       * Get _hasRB
       * 
       * @return  _hasRB
       *
       */
      
      int hasRB( void ) const;
      
      /** 
       * Get _hasNonbonded
       * 
       * @return  _hasNonbonded
       *
       */
      
      int hasNonbonded( void ) const;
      
      /** 
       * Get _cmMotionFrequency
       * 
       * @return  _cmMotionFrequency
       *
       */
      
      int cmMotionFrequency( void ) const;

   private:

      int _removeCOM;
      int _useOBC;
      int _hasBonds;
      int _hasAngles;
      int _hasPeriodicTorsions;
      int _hasRB;
      int _hasNonbonded;
      int _cmMotionFrequency;
};

/**
 * This Platform subclass uses the Brook implementations of all the OpenMM kernels.
 */

class OPENMM_EXPORT BrookPlatform : public Platform {

   public:

      // return values

      static const int DefaultReturnValue = 0;
      static const int DefaultErrorValue  = -1;

      /** 
       * BrookPlatform constructor
       *
       */
      
      BrookPlatform();

      /** 
       * BrookPlatform constructor
       *
       * @param defaultParticleStreamWidth  stream width
       * @param runtime                 Brook runtime (cal/cpu)
       * @param log                     log file reference
       *
       */
      
      BrookPlatform( int particleStreamWdith, const std::string& runtime, FILE* log = NULL );

      /** 
       * BrookPlatform destructor
       *
       */
      
	  ~BrookPlatform();

      /** 
       * Return platform name
       *
       * @return "Brook"
       */
      
      const std::string& getName() const;

      /** 
       * Return platform speed
       *
       * @return speed
       */

      double getSpeed( void ) const;

      /** 
       * Return true if BrookPlatform supports double precison
       *
       * @return true if BrookPlatform supports double precison
       */
      
// w/ FAH bool is redefined as int; causes problem w/ Platform::bool supportsDoublePrecision() const;
#define bool bool
	  bool supportsDoublePrecision( void ) const;

      /**
       * Return default Brook stream factory
       *
       * @return Brook stream factory
       */
      
      const StreamFactory& getDefaultStreamFactory( void ) const;
  
      /**
       * Get the runtime
       * 
       * @return runtime
       */

      std::string getRuntime( void );
  
      /** 
       * Get stream height and size given minimum number of elements in stream
       * 
       * @param size   input size of stream
       * @param width  width of stream
       * @param height output height of stream (may be NULL)
       *
       * @return stream size (=streamWidth*height)
       */

      static int getStreamSize( int size, int streamWidth, int* outputHeight );

      /** 
       * Get default stream width
       * 
       * @return default stream width
       */

      int getParticleStreamWidth( void ) const;

      /** 
       * Set log file reference
       * 
       * @param  log file reference
       *
       * @return DefaultReturnValue
       *
       */
      
      int setLog( FILE* log );

      /* 
       * Get contents of object
       *
       * @param level of dump
       *
       * @return string containing contents
       *
       * */
      
      std::string getContents( int level ) const;

      /** 
       * Get log file reference
       * 
       * @return  log file reference
       *
       */
      
      FILE* getLog( void ) const;
      
      /** 
       * This is called whenever a new Context is created.  It gives the Platform a chance to initialize
       * the context and store platform-specific data in it.
       */
      void contextCreated( ContextImpl& context ) const;

      /** 
       * This is called whenever a Context is deleted.  It gives the Platform a chance to clean up
       * any platform-specific data that was stored in it.
       */

      void contextDestroyed( ContextImpl& context ) const;

      /** 
       * Get minSuggestedThreads
       */

      int getMinSuggestedThreads( void ) const;

      /** 
       * Get duplicationFactor
       */

      int getDuplicationFactor( int numberOfParticles ) const;

   private:

      // log file reference

      FILE* _log;

      // default stream factory

      BrookStreamFactory _defaultStreamFactory;

      // default stream width

      static const int DefaultParticleStreamWidth   = 32;

      // particle streamwidth

      int _particleStreamWidth;

      // Brook runtime

      std::string _runtime;

      // min suggested threads

      int _minSuggestedThreads;

      /** 
       * Initialize kernel factory
       *
       */

      void _initializeKernelFactory( void );

      /** 
       * Set & validate runtime
       *
       * @param runtime    Brook runtime (cal/cpu)
       *
       * @throws exception if runtime is invalid
       */
      
      void _setBrookRuntime( const std::string& runtime );
      
};


} // namespace OpenMM

#endif /*OPENMM_BROOKPLATFORM_H_*/
