/**
 *  \file IMP/kernel/declare_Particle.h
 *  \brief Classes to handle individual model particles.
 *
 *  Copyright 2007-2013 IMP Inventors. All rights reserved.
 *
 */

#ifndef IMPKERNEL_DECLARE_PARTICLE_H
#define IMPKERNEL_DECLARE_PARTICLE_H

#include <IMP/kernel/kernel_config.h>
#include "base_types.h"
#include <IMP/base/Object.h>
#include <IMP/base/utility.h>
#include "Key.h"
#include "internal/AttributeTable.h"
#include "DerivativeAccumulator.h"
#include <IMP/base/Pointer.h>
#include "ModelObject.h"
#include "particle_index.h"
#include <utility>


#define IMP_PARTICLE_ATTRIBUTE_TYPE_DECL(UCName, lcname, Value)         \
  void add_attribute(UCName##Key name, Value initial_value);            \
  void remove_attribute(UCName##Key name);                              \
  bool has_attribute(UCName##Key name) const;                           \
  Value get_value(UCName##Key name) const;                              \
  void set_value(UCName##Key name, Value value);                        \
  void add_cache_attribute(UCName##Key name, Value value);              \
  UCName##Keys get_##lcname##_keys() const


#define IMP_PARTICLE_ATTRIBUTE_TYPE_DEF(UCName, lcname, Value)          \
  inline void Particle::add_attribute(UCName##Key name, Value initial_value){ \
    IMP_USAGE_CHECK(get_is_active(), "Inactive particle used.");        \
    get_model()->add_attribute(name, id_, initial_value);               \
  }                                                                     \
  inline void Particle::remove_attribute(UCName##Key name) {            \
    IMP_USAGE_CHECK(get_is_active(), "Inactive particle used.");        \
    get_model()->remove_attribute(name, id_);                           \
  }                                                                     \
  inline bool Particle::has_attribute(UCName##Key name) const{          \
    IMP_USAGE_CHECK(get_is_active(), "Inactive particle used.");        \
    return get_model()->get_has_attribute(name, id_);                   \
  }                                                                     \
  inline Value Particle::get_value(UCName##Key name) const {            \
    IMP_USAGE_CHECK(get_is_active(), "Inactive particle used.");        \
    return get_model()->get_attribute(name, id_);                       \
  }                                                                     \
  inline void Particle::set_value(UCName##Key name, Value value) {      \
    IMP_USAGE_CHECK(get_is_active(), "Inactive particle used.");        \
    get_model()->set_attribute(name, id_, value);                       \
  }                                                                     \
  inline UCName##Keys Particle::get_##lcname##_keys() const {           \
    IMP_USAGE_CHECK(get_is_active(), "Inactive particle used.");        \
    return get_model()->internal::UCName##AttributeTable                \
        ::get_attribute_keys(id_);                                      \
  }                                                                     \
  inline void Particle::add_cache_attribute(UCName##Key name,           \
                                            Value value) {              \
    IMP_USAGE_CHECK(get_is_active(), "Inactive particle used.");        \
    return get_model()->add_cache_attribute(name, id_, value);          \
  }



IMPKERNEL_BEGIN_NAMESPACE

class Model;
class Changed;
class SaveOptimizeds;

//! Class to handle individual model particles.
/** At this point a Particle should only be considered as a placeholder for the
    ParticleIndex, accessed through the get_index() method.
*/
class IMPKERNELEXPORT Particle : public ModelObject
{
 private:
  // doxygen produces funny docs for these things
#ifndef IMP_DOXYGEN
  friend class Model;
#endif
  ParticleIndex id_;
  IMP_OBJECT(Particle);
 public:

  //! Construct a particle and add it to the Model
  Particle(Model *m, std::string name);

  //! Construct a particle and add it to the Model
  Particle(Model *m);

#ifndef IMP_DOXYGEN
  IMP_PARTICLE_ATTRIBUTE_TYPE_DECL(Float, float, Float);
  IMP_PARTICLE_ATTRIBUTE_TYPE_DECL(Int, int, Int);
  IMP_PARTICLE_ATTRIBUTE_TYPE_DECL(String, string, String);
  IMP_PARTICLE_ATTRIBUTE_TYPE_DECL(Object, object, Object*);
  IMP_PARTICLE_ATTRIBUTE_TYPE_DECL(WeakObject, weak_object, Object*);


 /** @name Float Attributes
      Float attributes can be optimized, meaning the optimizer is
      allowed to change their value in order to improve the score.
      As a result, there are a number of extra methods to manipulate
      them.

      All distances are assumed to be in angstroms
      and derivatives in kcal/mol angstrom. This is not enforced.
  */
  /*@{*/
  void add_attribute(FloatKey name, const Float initial_value, bool optimized);

  void add_to_derivative(FloatKey key, Float value,
                         const DerivativeAccumulator &da);

  void set_is_optimized(FloatKey k, bool tf);

  bool get_is_optimized(FloatKey k) const;

  Float get_derivative(FloatKey name) const ;
  /** @} */

  /** \name Particle attributes
      @{
  */
  void add_attribute(ParticleIndexKey k, Particle *v);
  bool has_attribute(ParticleIndexKey k);
  void set_value(ParticleIndexKey k, Particle *v);
  Particle *get_value(ParticleIndexKey k) const;
  void remove_attribute(ParticleIndexKey k);
  ParticleIndexKeys get_particle_keys() const;
  /** @} */

  //! Get whether the particle is active.
  /** Restraints referencing the particle are only evaluated for 'active'
      particles.
      \return true it the particle is active.
  */
  bool get_is_active() const;
#endif

#if 0
#if !defined(IMP_DOXYGEN)&& !defined(SWIG)
  void *operator new(std::size_t sz, void*p);
  void operator delete(void *p);
  void *operator new(std::size_t sz);
#endif
#endif

  ParticleIndex get_index() const;

#if !defined(IMP_DOXYGEN)
  void clear_caches();
#endif
 protected:
  virtual ModelObjectsTemp do_get_inputs() const IMP_OVERRIDE IMP_FINAL {
    return ModelObjectsTemp();
  }
  virtual ModelObjectsTemp do_get_outputs() const IMP_OVERRIDE IMP_FINAL {
    return ModelObjectsTemp();
  }
  virtual void do_update_dependencies() IMP_OVERRIDE IMP_FINAL {}
};

IMPKERNEL_END_NAMESPACE

#endif  /* IMPKERNEL_DECLARE_PARTICLE_H */