/******************************************************************/
/* 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 _REFLECTANCESHADER_BASE_H_
#define _REFLECTANCESHADER_BASE_H_

#include <memory>
#include "brdf_base.h"
#include "shader_base.h"

class reflectanceShader_base : public shader_base {
 public:
  //////////////////
  // Constructors //
  //////////////////
  reflectanceShader_base(void) {}
  reflectanceShader_base(const reflectanceShader_base&) = delete;

  ///////////////
  // Operators //
  ///////////////
  reflectanceShader_base& operator=(const reflectanceShader_base&) = delete;

  /////////////
  // Methods //
  /////////////
  virtual color shade(const intersectionPoint& ip, const vec3d& light_dir) const final override;

  virtual color reflectance(const intersectionPoint& ip, const vec3d& light_dir) const final override;
  virtual brdfSample sample(const intersectionPoint& ip, float r1, float r2) const final override;
  virtual float reflectivity(const intersectionPoint& ip) const final override;
  virtual color emittance(const intersectionPoint& ip) const final override;

  virtual shaderProperties properties(const intersectionPoint& ip) const final override;

 protected:
  ///////////////////////
  // Protected Methods //
  ///////////////////////
  virtual void _print(std::ostream& s) const override = 0;

  virtual std::unique_ptr<const brdf_base> make_brdf(const vec2d& textureCoord) const = 0;
};

#endif /* _REFLECTANCE_SHADER_BASE_H_ */