// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0.If a copy of the MPL was not distributed with this
// file, You can obtain one at https ://mozilla.org/MPL/2.0/.

#ifndef DIRECTION_H
#define DIRECTION_H

#include "Angle.h"

namespace Passer {
namespace LinearAlgebra {

struct Vector3;

template <typename T>
class DirectionOf {
 public:
  /// @brief horizontal angle, range= (-180..180]
  AngleOf<T> horizontal;
  /// @brief vertical angle, range in degrees = (-90..90]
  AngleOf<T> vertical;

  DirectionOf<T>();
  DirectionOf<T>(AngleOf<T> horizontal, AngleOf<T> vertical);
  // DirectionOf<T>(Vector3 v);

  Vector3 ToVector3() const;
  static DirectionOf<T> FromVector3(Vector3 v);

  static DirectionOf<T> Degrees(float horizontal, float vertical);
  static DirectionOf<T> Radians(float horizontal, float vertical);

  const static DirectionOf forward;
  const static DirectionOf back;
  const static DirectionOf up;
  const static DirectionOf down;
  const static DirectionOf left;
  const static DirectionOf right;

  bool operator==(const DirectionOf<T> d) const;

  DirectionOf<T> operator-() const;

  Vector3 ToVector3();

 protected:
  void Normalize();
};

using DirectionSingle = DirectionOf<float>;
using Direction16 = DirectionOf<signed short>;
using Direction = DirectionOf<float>;

}  // namespace LinearAlgebra
}  // namespace Passer
using namespace Passer::LinearAlgebra;

#endif