/*****************************************************************************************
 *                                                                                       *
 * OpenSpace                                                                             *
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 * Copyright (c) 2014-2016                                                               *
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#ifndef __POWERSCALEDSCALAR_H__
#define __POWERSCALEDSCALAR_H__

// glm includes
#include <ghoul/glm.h>
#include <glm/gtc/matrix_transform.hpp>
#include <glm/gtc/type_ptr.hpp>

#include <iostream>

namespace openspace {

class PowerScaledScalar {
public:
    // constructors
    PowerScaledScalar();
    PowerScaledScalar(const glm::vec2 &v);
    PowerScaledScalar(float f1, float f2);
    static PowerScaledScalar CreatePSS(double d1);

    const glm::vec2& vec2() const;
    float lengthf() const;
    double lengthd() const;


    // operator overloading
    PowerScaledScalar& operator=(const PowerScaledScalar& rhs);
    PowerScaledScalar& operator+=(const PowerScaledScalar& rhs);
    const PowerScaledScalar operator+(const PowerScaledScalar& rhs) const;
    PowerScaledScalar& operator-=(const PowerScaledScalar& rhs);
    const PowerScaledScalar operator-(const PowerScaledScalar& rhs) const;
    PowerScaledScalar& operator*=(const PowerScaledScalar& rhs);
    const PowerScaledScalar operator*(const PowerScaledScalar& rhs) const;
    PowerScaledScalar& operator*=(const float& rhs);
    const PowerScaledScalar operator*(const float& rhs) const;
    float& operator[](unsigned int idx);
    float operator[](unsigned int idx) const;

    // comparison
    bool operator==(const PowerScaledScalar& other) const;
    bool operator<(const PowerScaledScalar& other) const;
    bool operator>(const PowerScaledScalar& other) const;
    bool operator<=(const PowerScaledScalar& other) const;
    bool operator>=(const PowerScaledScalar& other) const;
    
    bool operator==(double other) const;
    bool operator<(double other) const;
    bool operator>(double other) const;
    bool operator<=(double other) const;
    bool operator>=(double other) const;

    // glm integration
    PowerScaledScalar& operator=(const glm::vec2& rhs);
    PowerScaledScalar& operator=(float rhs);
    
    friend std::ostream& operator<<(std::ostream& os, const PowerScaledScalar& rhs);
    
    // allow the power scaled coordinates to access private members
    friend class PowerScaledCoordinate;
private:
    // float vector used when returning float values
    glm::vec2 _data;

};

typedef PowerScaledScalar pss;


} // namespace openspace

#endif // __POWERSCALEDSCALAR_H__
