/******************************************************************/
/* This file is part of the homework assignments for CSCI-427/527 */
/* at The College of William & Mary and authored by Pieter Peers. */
/* No part of this file, whether altered or in original form, can */
/* be distributed or used outside the context of CSCI-427/527     */
/* without consent of either the College of William & Mary or     */
/* Pieter Peers.                                                  */
/******************************************************************/
#ifndef _PHONGBRDF_H_
#define _PHONGBRDF_H_

#include "brdf_base.h"

class phongBrdf : public brdf_base {
 public:
  //////////////////
  // Constructors //
  //////////////////
  phongBrdf(const color& albedo, float sharpness);
  phongBrdf(const phongBrdf& src);

  ///////////////
  // Operators //
  ///////////////
  phongBrdf& operator=(const phongBrdf& src);

  /////////////
  // Methods //
  /////////////
  virtual color shade(const vec3d& in, const vec3d& out) const override;
  virtual color reflectance(const vec3d& in, const vec3d& out) const final override;
  virtual brdfSample sample(const vec3d& in, float r1, float r2) const final override;

  virtual bool isSpecular(void) const final override;
  virtual bool isDiffuse(void) const final override;

  virtual float reflectivity(void) const final override;

  /////////////
  // Friends //
  /////////////
  friend void swap(phongBrdf& a, phongBrdf& b) { a._swap(b); }
  friend std::ostream& operator<<(std::ostream& s, const phongBrdf& b)
  {
    b._print(s);
    return s;
  }

 private:
  /////////////////////
  // Private Methods //
  /////////////////////
  void _assign(const phongBrdf& src);
  void _swap(phongBrdf& src);
  virtual void _print(std::ostream& s) const override;

  //////////////////
  // Data Members //
  //////////////////
  color _albedo;
  float _sharpness;
};

#endif /* _PHONGBRDF_H_ */