// Copyright (C) 2012 Jérôme Leclercq
// This file is part of the "Nazara Engine - Mathematics module"
// For conditions of distribution and use, see copyright notice in Config.hpp

#pragma once

#ifndef NAZARA_MATRIX4_HPP
#define NAZARA_MATRIX4_HPP

#include <Nazara/Core/String.hpp>
#include <Nazara/Math/Config.hpp>

template<typename T> class NzEulerAngles;
template<typename T> class NzQuaternion;
template<typename T> class NzVector2;
template<typename T> class NzVector3;
template<typename T> class NzVector4;

template<typename T>
class NzMatrix4
{
	public:
		NzMatrix4() = default;
		NzMatrix4(T r11, T r12, T r13, T r14,
		          T r21, T r22, T r23, T r24,
		          T r31, T r32, T r33, T r34,
		          T r41, T r42, T r43, T r44);
		//NzMatrix4(const NzMatrix3<T>& matrix);
		NzMatrix4(const T matrix[16]);
		template<typename U> explicit NzMatrix4(const NzMatrix4<U>& matrix);
		NzMatrix4(const NzMatrix4& matrix) = default;
		~NzMatrix4() = default;

		NzMatrix4& ApplyScale(const NzVector3<T>& scale);

		NzMatrix4& Concatenate(const NzMatrix4& matrix);
		NzMatrix4& ConcatenateAffine(const NzMatrix4& matrix);

		T GetDeterminant() const;
		bool GetInverse(NzMatrix4* dest) const;
		bool GetInverseAffine(NzMatrix4* dest) const;
		NzQuaternion<T> GetRotation() const;
		//NzMatrix3 GetRotationMatrix() const;
		NzVector3<T> GetScale() const;
		NzVector3<T> GetTranslation() const;
		void GetTransposed(NzMatrix4* dest) const;

		bool HasNegativeScale() const;
		bool HasScale() const;

		NzMatrix4& Inverse(bool* succeeded = nullptr);
		NzMatrix4& InverseAffine(bool* succeeded = nullptr);

		bool IsAffine() const;

		NzMatrix4& MakeIdentity();
		NzMatrix4& MakeLookAt(const NzVector3<T>& eye, const NzVector3<T>& target, const NzVector3<T>& up = NzVector3<T>::Up());
		NzMatrix4& MakeOrtho(T left, T top, T width, T height, T zNear = -1.0, T zFar = 1.0);
		NzMatrix4& MakePerspective(T angle, T ratio, T zNear, T zFar);
		NzMatrix4& MakeRotation(const NzQuaternion<T>& rotation);
		NzMatrix4& MakeScale(const NzVector3<T>& scale);
		NzMatrix4& MakeTranslation(const NzVector3<T>& translation);
		NzMatrix4& MakeTransform(const NzVector3<T>& translation, const NzVector3<T>& scale, const NzQuaternion<T>& rotation);
		NzMatrix4& MakeZero();

		NzMatrix4& Set(T r11, T r12, T r13, T r14,
		               T r21, T r22, T r23, T r24,
		               T r31, T r32, T r33, T r34,
		               T r41, T r42, T r43, T r44);
		NzMatrix4& Set(const T matrix[16]);
		//NzMatrix4(const NzMatrix3<T>& matrix);
		NzMatrix4& Set(const NzMatrix4& matrix);
		NzMatrix4& Set(NzMatrix4&& matrix);
		template<typename U> NzMatrix4& Set(const NzMatrix4<U>& matrix);
		NzMatrix4& SetRotation(const NzQuaternion<T>& rotation);
		NzMatrix4& SetScale(const NzVector3<T>& scale);
		NzMatrix4& SetTranslation(const NzVector3<T>& translation);

		NzString ToString() const;

		NzVector2<T> Transform(const NzVector2<T>& vector, T z = 0.0, T w = 1.0) const;
		NzVector3<T> Transform(const NzVector3<T>& vector, T w = 1.0) const;
		NzVector4<T> Transform(const NzVector4<T>& vector) const;

		NzMatrix4& Transpose();

		operator T*();
		operator const T*() const;

		T& operator()(unsigned int x, unsigned int y);
		const T& operator()(unsigned int x, unsigned int y) const;

		NzMatrix4& operator=(const NzMatrix4& matrix) = default;

		NzMatrix4 operator*(const NzMatrix4& matrix) const;
		NzVector2<T> operator*(const NzVector2<T>& vector) const;
		NzVector3<T> operator*(const NzVector3<T>& vector) const;
		NzVector4<T> operator*(const NzVector4<T>& vector) const;
		NzMatrix4 operator*(T scalar) const;

		NzMatrix4& operator*=(const NzMatrix4& matrix);
		NzMatrix4& operator*=(T scalar);

		bool operator==(const NzMatrix4& mat) const;
		bool operator!=(const NzMatrix4& mat) const;

		static NzMatrix4 Identity();
		static NzMatrix4 LookAt(const NzVector3<T>& eye, const NzVector3<T>& target, const NzVector3<T>& up = NzVector3<T>::Up());
		static NzMatrix4 Ortho(T left, T top, T width, T height, T zNear = -1.0, T zFar = 1.0);
		static NzMatrix4 Perspective(T angle, T ratio, T zNear, T zFar);
		static NzMatrix4 Rotate(const NzQuaternion<T>& rotation);
		static NzMatrix4 Scale(const NzVector3<T>& scale);
		static NzMatrix4 Translate(const NzVector3<T>& translation);
		static NzMatrix4 Transform(const NzVector3<T>& translation, const NzVector3<T>& scale, const NzQuaternion<T>& rotation);
		static NzMatrix4 Zero();

		T m11, m12, m13, m14,
		  m21, m22, m23, m24,
		  m31, m32, m33, m34,
		  m41, m42, m43, m44;
};

template<typename T> std::ostream& operator<<(std::ostream& out, const NzMatrix4<T>& matrix);

template<typename T> NzMatrix4<T> operator*(T scale, const NzMatrix4<T>& matrix);

typedef NzMatrix4<double> NzMatrix4d;
typedef NzMatrix4<float> NzMatrix4f;

#include <Nazara/Math/Matrix4.inl>

#endif // NAZARA_MATRIX4_HPP