#pragma once

#include "drape/glsl_types.hpp"

#include "base/assert.hpp"

#include <type_traits>
#include <utility>

namespace df
{
#define DECLARE_SETTER(name, field) \
template<typename T> struct Check##name \
{ \
private: \
  static void Detect(...); \
  template<typename U> static decltype(std::declval<U>().field) Detect(U const &); \
public: \
  static constexpr bool Value = !std::is_same<void, decltype(Detect(std::declval<T>()))>::value; \
}; \
template <typename ParamsType> \
std::enable_if_t<Check##name<ParamsType>::Value> \
name(ParamsType & params) const \
{ \
  params.field = field; \
} \
template <typename ParamsType> \
std::enable_if_t<!Check##name<ParamsType>::Value> \
name(ParamsType & params) const {}


struct FrameValues
{
  glsl::mat4 m_projection;
  glsl::mat4 m_pivotTransform;
  float m_zScale = 1.0f;

  template <typename ParamsType>
  void SetTo(ParamsType & params) const
  {
    SetProjection(params);
    SetPivotTransform(params);
    SetZScale(params);
  }

private:
  DECLARE_SETTER(SetProjection, m_projection)
  DECLARE_SETTER(SetPivotTransform, m_pivotTransform)
  DECLARE_SETTER(SetZScale, m_zScale)
};
}  // namespace df