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#pragma once
#ifndef MATH_FLOAT2_H
#define MATH_FLOAT2_H
//------------------------------------------------------------------------------
/**
    @class Math::float2

    A 2-component float vector class.

*/
#include "core/types.h"
#include "math/scalar.h"

//------------------------------------------------------------------------------
namespace Math
{
class float2
{
public:
    /// default constructor, NOTE: does NOT setup components!
    float2();
    /// construct from values
    float2(scalar x, scalar y);
    /// copy constructor
    float2(const float2& rhs);
    /// assignment operator
    void operator=(const float2& rhs);
    /// flip sign
    float2 operator-() const;
    /// inplace add
    void operator+=(const float2& rhs);
    /// inplace sub
    void operator-=(const float2& rhs);
    /// inplace scalar multiply
    void operator*=(scalar s);
    /// add 2 vectors
    float2 operator+(const float2& rhs) const;
    /// subtract 2 vectors
    float2 operator-(const float2& rhs) const;
    /// multiply with scalar
    float2 operator*(scalar s) const;
    /// equality operator
    bool operator==(const float2& rhs) const;
    /// inequality operator
    bool operator!=(const float2& rhs) const;
    /// set content
    void set(scalar x, scalar y);
    /// read/write access to x component
    scalar& x();
    /// read/write access to y component
    scalar& y();
    /// read-only access to x component
    scalar x() const;
    /// read-only access to y component
    scalar y() const;

    /// return length of vector
    scalar length() const;
    /// return squared length of vector
    scalar lengthsq() const;
    /// return compononent-wise absolute
    float2 abs() const;    
    /// return true if any components are non-zero
    bool any() const;
    /// return true if all components are non-zero
    bool all() const;
    /// return vector made up of largest components of 2 vectors
    static float2 maximize(const float2& v0, const float2& v1);
    /// return vector made up of smallest components of 2 vectors
    static float2 minimize(const float2& v0, const float2& v1);
    /// return normalized version of vector
    static float2 normalize(const float2& v);
    /// set less-then components to non-zero 
    static float2 lt(const float2& v0, const float2& v1);
    /// set less-or-equal components to non-zero
    static float2 le(const float2& v0, const float2& v1);
    /// set greater-then components to non-zero
    static float2 gt(const float2& v0, const float2& v1);
    /// set greater-or-equal components to non-zero
    static float2 ge(const float2& v0, const float2& v1);

    /// convert to anything
    template<typename T> T as() const;

protected:
    scalar X;
    scalar Y;
};

//------------------------------------------------------------------------------
/**
*/
inline
float2::float2() : X(0.0f),Y(0.0f)
{
    //  empty
}

//------------------------------------------------------------------------------
/**
*/
inline 
float2::float2(scalar x, scalar y) :
    X(x), Y(y)
{
    // empty
}

//------------------------------------------------------------------------------
/**
*/
inline
float2::float2(const float2& rhs) :
    X(rhs.X), Y(rhs.Y)
{
    // empty
}

//------------------------------------------------------------------------------
/**
*/
inline void
float2::operator=(const float2& rhs)
{
    this->X = rhs.X;
    this->Y = rhs.Y;
}

//------------------------------------------------------------------------------
/**
*/
inline bool
float2::operator==(const float2& rhs) const
{
    return (this->X == rhs.X) && (this->Y == rhs.Y);
}

//------------------------------------------------------------------------------
/**
*/
inline bool
float2::operator!=(const float2& rhs) const
{
    return (this->X != rhs.X) || (this->Y != rhs.Y);
}

//------------------------------------------------------------------------------
/**
*/
inline float2
float2::operator-() const
{
    return float2(-this->X, -this->Y);
}

//------------------------------------------------------------------------------
/**
*/
inline float2
float2::operator*(scalar t) const
{
    return float2(this->X * t, this->Y * t);
}

//------------------------------------------------------------------------------
/**
*/
inline void
float2::operator+=(const float2& rhs)
{
    this->X += rhs.X;
    this->Y += rhs.Y;
}

//------------------------------------------------------------------------------
/**
*/
inline void
float2::operator-=(const float2& rhs)
{
    this->X -= rhs.X;
    this->Y -= rhs.Y;
}

//------------------------------------------------------------------------------
/**
*/
inline void
float2::operator*=(scalar s)
{
    this->X *= s;
    this->Y *= s;
}

//------------------------------------------------------------------------------
/**
*/
inline float2
float2::operator+(const float2& rhs) const
{
    return float2(this->X + rhs.X, this->Y + rhs.Y);
}

//------------------------------------------------------------------------------
/**
*/
inline float2
float2::operator-(const float2& rhs) const
{
    //return float2(this->X + rhs.X, this->Y + rhs.Y);
	return float2(this->X - rhs.X, this->Y - rhs.Y);
}

//------------------------------------------------------------------------------
/**
*/
inline void
float2::set(scalar x, scalar y)
{
    this->X = x;
    this->Y = y;
}

//------------------------------------------------------------------------------
/**
*/
inline scalar&
float2::x()
{
    return this->X;
}

//------------------------------------------------------------------------------
/**
*/
inline scalar
float2::x() const
{
    return this->X;
}

//------------------------------------------------------------------------------
/**
*/
inline scalar&
float2::y()
{
    return this->Y;
}

//------------------------------------------------------------------------------
/**
*/
inline scalar
float2::y() const
{
    return this->Y;
}

//------------------------------------------------------------------------------
/**
*/
inline scalar
float2::length() const
{
    return n_sqrt(this->X * this->X + this->Y * this->Y);
}

//------------------------------------------------------------------------------
/**
*/
inline scalar
float2::lengthsq() const
{
    return this->X * this->X + this->Y * this->Y;
}

//------------------------------------------------------------------------------
/**
*/
inline float2
float2::abs() const
{
    return float2(n_abs(this->X), n_abs(this->Y));
}

//------------------------------------------------------------------------------
/**
*/
inline bool
float2::any() const
{
    return (this->X != 0.0f) || (this->Y != 0.0f);
}

//------------------------------------------------------------------------------
/**
*/
inline bool
float2::all() const
{
    return (this->X != 0.0f) && (this->Y != 0.0f);
}

//------------------------------------------------------------------------------
/**
*/
inline float2
float2::lt(const float2& v0, const float2& v1)
{
    float2 res;
    res.X = (v0.X < v1.X) ? 1.0f : 0.0f;
    res.Y = (v0.Y < v1.Y) ? 1.0f : 0.0f;
    return res;
}

//------------------------------------------------------------------------------
/**
*/
inline float2
float2::le(const float2& v0, const float2& v1)
{
    float2 res;
    res.X = (v0.X <= v1.X) ? 1.0f : 0.0f;
    res.Y = (v0.Y <= v1.Y) ? 1.0f : 0.0f;
    return res;
}

//------------------------------------------------------------------------------
/**
*/
inline float2
float2::gt(const float2& v0, const float2& v1)
{
    float2 res;
    res.X = (v0.X > v1.X) ? 1.0f : 0.0f;
    res.Y = (v0.Y > v1.Y) ? 1.0f : 0.0f;
    return res;
}

//------------------------------------------------------------------------------
/**
*/
inline float2
float2::ge(const float2& v0, const float2& v1)
{
    float2 res;
    res.X = (v0.X >= v1.X) ? 1.0f : 0.0f;
    res.Y = (v0.Y >= v1.Y) ? 1.0f : 0.0f;
    return res;
}

//------------------------------------------------------------------------------
/**
*/
inline float2
float2::normalize(const float2& v)
{
    scalar l = v.length();
    if (l > 0.0f)
    {
        return float2(v.X / l, v.Y / l);
    }
    else
    {
        return float2(1.0f, 0.0f);
    }
}

//------------------------------------------------------------------------------
/**
*/
inline float2
float2::maximize(const float2& v0, const float2& v1)
{
    return float2(n_max(v0.X, v1.X), n_max(v0.Y, v1.Y));
}

//------------------------------------------------------------------------------
/**
*/
inline float2
float2::minimize(const float2& v0, const float2& v1)
{
    return float2(n_min(v0.X, v1.X), n_min(v0.Y, v1.Y));
}

} // namespace Math
//------------------------------------------------------------------------------
#endif