/*************************************************************************/
/*  vector4.h                                                            */
/*************************************************************************/
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#ifndef VECTOR4_H
#define VECTOR4_H

#include "core/error/error_macros.h"
#include "core/math/math_funcs.h"

class String;

struct _NO_DISCARD_ Vector4 {
	static const int AXIS_COUNT = 4;

	enum Axis {
		AXIS_X,
		AXIS_Y,
		AXIS_Z,
		AXIS_W,
	};

	union {
		struct {
			real_t x;
			real_t y;
			real_t z;
			real_t w;
		};
		real_t components[4] = { 0, 0, 0, 0 };
	};

	_FORCE_INLINE_ real_t &operator[](const int p_axis) {
		DEV_ASSERT((unsigned int)p_axis < 4);
		return components[p_axis];
	}
	_FORCE_INLINE_ const real_t &operator[](const int p_axis) const {
		DEV_ASSERT((unsigned int)p_axis < 4);
		return components[p_axis];
	}

	Vector4::Axis min_axis_index() const;
	Vector4::Axis max_axis_index() const;

	_FORCE_INLINE_ real_t length_squared() const;
	bool is_equal_approx(const Vector4 &p_vec4) const;
	bool is_zero_approx() const;
	real_t length() const;
	void normalize();
	Vector4 normalized() const;
	bool is_normalized() const;

	real_t distance_to(const Vector4 &p_to) const;
	real_t distance_squared_to(const Vector4 &p_to) const;
	Vector4 direction_to(const Vector4 &p_to) const;

	Vector4 abs() const;
	Vector4 sign() const;
	Vector4 floor() const;
	Vector4 ceil() const;
	Vector4 round() const;
	Vector4 lerp(const Vector4 &p_to, const real_t p_weight) const;
	Vector4 cubic_interpolate(const Vector4 &p_b, const Vector4 &p_pre_a, const Vector4 &p_post_b, const real_t p_weight) const;
	Vector4 cubic_interpolate_in_time(const Vector4 &p_b, const Vector4 &p_pre_a, const Vector4 &p_post_b, const real_t p_weight, const real_t &p_b_t, const real_t &p_pre_a_t, const real_t &p_post_b_t) const;

	Vector4 posmod(const real_t p_mod) const;
	Vector4 posmodv(const Vector4 &p_modv) const;
	void snap(const Vector4 &p_step);
	Vector4 snapped(const Vector4 &p_step) const;
	Vector4 clamp(const Vector4 &p_min, const Vector4 &p_max) const;

	Vector4 inverse() const;
	_FORCE_INLINE_ real_t dot(const Vector4 &p_vec4) const;

	_FORCE_INLINE_ void operator+=(const Vector4 &p_vec4);
	_FORCE_INLINE_ void operator-=(const Vector4 &p_vec4);
	_FORCE_INLINE_ void operator*=(const Vector4 &p_vec4);
	_FORCE_INLINE_ void operator/=(const Vector4 &p_vec4);
	_FORCE_INLINE_ void operator*=(const real_t &s);
	_FORCE_INLINE_ void operator/=(const real_t &s);
	_FORCE_INLINE_ Vector4 operator+(const Vector4 &p_vec4) const;
	_FORCE_INLINE_ Vector4 operator-(const Vector4 &p_vec4) const;
	_FORCE_INLINE_ Vector4 operator*(const Vector4 &p_vec4) const;
	_FORCE_INLINE_ Vector4 operator/(const Vector4 &p_vec4) const;
	_FORCE_INLINE_ Vector4 operator-() const;
	_FORCE_INLINE_ Vector4 operator*(const real_t &s) const;
	_FORCE_INLINE_ Vector4 operator/(const real_t &s) const;

	_FORCE_INLINE_ bool operator==(const Vector4 &p_vec4) const;
	_FORCE_INLINE_ bool operator!=(const Vector4 &p_vec4) const;
	_FORCE_INLINE_ bool operator>(const Vector4 &p_vec4) const;
	_FORCE_INLINE_ bool operator<(const Vector4 &p_vec4) const;
	_FORCE_INLINE_ bool operator>=(const Vector4 &p_vec4) const;
	_FORCE_INLINE_ bool operator<=(const Vector4 &p_vec4) const;

	operator String() const;

	_FORCE_INLINE_ Vector4() {}

	_FORCE_INLINE_ Vector4(real_t p_x, real_t p_y, real_t p_z, real_t p_w) :
			x(p_x),
			y(p_y),
			z(p_z),
			w(p_w) {
	}

	Vector4(const Vector4 &p_vec4) :
			x(p_vec4.x),
			y(p_vec4.y),
			z(p_vec4.z),
			w(p_vec4.w) {
	}

	void operator=(const Vector4 &p_vec4) {
		x = p_vec4.x;
		y = p_vec4.y;
		z = p_vec4.z;
		w = p_vec4.w;
	}
};

real_t Vector4::dot(const Vector4 &p_vec4) const {
	return x * p_vec4.x + y * p_vec4.y + z * p_vec4.z + w * p_vec4.w;
}

real_t Vector4::length_squared() const {
	return dot(*this);
}

void Vector4::operator+=(const Vector4 &p_vec4) {
	x += p_vec4.x;
	y += p_vec4.y;
	z += p_vec4.z;
	w += p_vec4.w;
}

void Vector4::operator-=(const Vector4 &p_vec4) {
	x -= p_vec4.x;
	y -= p_vec4.y;
	z -= p_vec4.z;
	w -= p_vec4.w;
}

void Vector4::operator*=(const Vector4 &p_vec4) {
	x *= p_vec4.x;
	y *= p_vec4.y;
	z *= p_vec4.z;
	w *= p_vec4.w;
}

void Vector4::operator/=(const Vector4 &p_vec4) {
	x /= p_vec4.x;
	y /= p_vec4.y;
	z /= p_vec4.z;
	w /= p_vec4.w;
}
void Vector4::operator*=(const real_t &s) {
	x *= s;
	y *= s;
	z *= s;
	w *= s;
}

void Vector4::operator/=(const real_t &s) {
	*this *= 1.0f / s;
}

Vector4 Vector4::operator+(const Vector4 &p_vec4) const {
	return Vector4(x + p_vec4.x, y + p_vec4.y, z + p_vec4.z, w + p_vec4.w);
}

Vector4 Vector4::operator-(const Vector4 &p_vec4) const {
	return Vector4(x - p_vec4.x, y - p_vec4.y, z - p_vec4.z, w - p_vec4.w);
}

Vector4 Vector4::operator*(const Vector4 &p_vec4) const {
	return Vector4(x * p_vec4.x, y * p_vec4.y, z * p_vec4.z, w * p_vec4.w);
}

Vector4 Vector4::operator/(const Vector4 &p_vec4) const {
	return Vector4(x / p_vec4.x, y / p_vec4.y, z / p_vec4.z, w / p_vec4.w);
}

Vector4 Vector4::operator-() const {
	return Vector4(-x, -y, -z, -w);
}

Vector4 Vector4::operator*(const real_t &s) const {
	return Vector4(x * s, y * s, z * s, w * s);
}

Vector4 Vector4::operator/(const real_t &s) const {
	return *this * (1.0f / s);
}

bool Vector4::operator==(const Vector4 &p_vec4) const {
	return x == p_vec4.x && y == p_vec4.y && z == p_vec4.z && w == p_vec4.w;
}

bool Vector4::operator!=(const Vector4 &p_vec4) const {
	return x != p_vec4.x || y != p_vec4.y || z != p_vec4.z || w != p_vec4.w;
}

bool Vector4::operator<(const Vector4 &p_v) const {
	if (x == p_v.x) {
		if (y == p_v.y) {
			if (z == p_v.z) {
				return w < p_v.w;
			}
			return z < p_v.z;
		}
		return y < p_v.y;
	}
	return x < p_v.x;
}

bool Vector4::operator>(const Vector4 &p_v) const {
	if (x == p_v.x) {
		if (y == p_v.y) {
			if (z == p_v.z) {
				return w > p_v.w;
			}
			return z > p_v.z;
		}
		return y > p_v.y;
	}
	return x > p_v.x;
}

bool Vector4::operator<=(const Vector4 &p_v) const {
	if (x == p_v.x) {
		if (y == p_v.y) {
			if (z == p_v.z) {
				return w <= p_v.w;
			}
			return z < p_v.z;
		}
		return y < p_v.y;
	}
	return x < p_v.x;
}

bool Vector4::operator>=(const Vector4 &p_v) const {
	if (x == p_v.x) {
		if (y == p_v.y) {
			if (z == p_v.z) {
				return w >= p_v.w;
			}
			return z > p_v.z;
		}
		return y > p_v.y;
	}
	return x > p_v.x;
}

_FORCE_INLINE_ Vector4 operator*(const float p_scalar, const Vector4 &p_vec) {
	return p_vec * p_scalar;
}

_FORCE_INLINE_ Vector4 operator*(const double p_scalar, const Vector4 &p_vec) {
	return p_vec * p_scalar;
}

_FORCE_INLINE_ Vector4 operator*(const int32_t p_scalar, const Vector4 &p_vec) {
	return p_vec * p_scalar;
}

_FORCE_INLINE_ Vector4 operator*(const int64_t p_scalar, const Vector4 &p_vec) {
	return p_vec * p_scalar;
}

#endif // VECTOR4_H