#ifndef VOXEL_VECTOR3I_H
#define VOXEL_VECTOR3I_H

#include <core/math/vector3.h>

struct Vector3i {

	union {
		struct {
			int x;
			int y;
			int z;
		};
		int coords[3];
	};

	_FORCE_INLINE_ Vector3i() : x(0), y(0), z(0) {}

	_FORCE_INLINE_ Vector3i(int px, int py, int pz) : x(px), y(py), z(pz) {}

	_FORCE_INLINE_ Vector3i(const Vector3i & other) {
		*this = other;
	}

	_FORCE_INLINE_ Vector3i(const Vector3 & f) {
		x = Math::floor(f.x);
		y = Math::floor(f.y);
		z = Math::floor(f.z);
	}

	_FORCE_INLINE_ Vector3 to_vec3() const {
		return Vector3(x, y, z);
	}

	_FORCE_INLINE_ int volume() const {
		return x*y*z;
	}

	_FORCE_INLINE_ int length_sq() const {
		return x*x + y*y + z*z;
	}

	_FORCE_INLINE_ float length() const {
		return Math::sqrt(length_sq());
	}

	_FORCE_INLINE_ Vector3i & operator=(const Vector3i & other) {
		x = other.x;
		y = other.y;
		z = other.z;
		return *this;
	}

	_FORCE_INLINE_ void operator+=(const Vector3i & other) {
		x += other.x;
		y += other.y;
		z += other.z;
	}

	_FORCE_INLINE_ void operator-=(const Vector3i & other) {
		x -= other.x;
		y -= other.y;
		z -= other.z;
	}

	_FORCE_INLINE_ int & operator[](unsigned int i) {
		return coords[i];
	}

	void clamp_to(const Vector3i min, const Vector3i max) {
		if (x < min.x) x = min.x;
		if (y < min.y) y = min.y;
		if (z < min.z) z = min.z;

		if (x >= max.x) x = max.x - 1;
		if (y >= max.y) y = max.y - 1;
		if (z >= max.z) z = max.z - 1;
	}

	_FORCE_INLINE_ bool is_contained_in(const Vector3i & min, const Vector3i & max) {
		return x >= min.x && y >= min.y && z >= min.z
			&& x < max.x && y < max.y && z < max.z;
	}

	_FORCE_INLINE_ Vector3i wrap(const Vector3i & size) {
		return Vector3i(
			x % size.x,
			y % size.y,
			z % size.z
		);
	}

	static void sort_min_max(Vector3i & a, Vector3i & b) {
		sort_min_max(a.x, b.x);
		sort_min_max(a.y, b.y);
		sort_min_max(a.z, b.z);
	}

private:
	static _FORCE_INLINE_ void sort_min_max(int & a, int & b) {
		if (a > b) {
			int temp = a;
			a = b;
			b = temp;
		}
	}

};

_FORCE_INLINE_ Vector3i operator+(const Vector3i a, const Vector3i & b) {
	return Vector3i(a.x + b.x, a.y + b.y, a.z + b.z);
}

_FORCE_INLINE_ Vector3i operator-(const Vector3i & a, const Vector3i & b) {
	return Vector3i(a.x - b.x, a.y - b.y, a.z - b.z);
}

_FORCE_INLINE_ Vector3i operator*(const Vector3i & a, int n) {
	return Vector3i(a.x * n, a.y * n, a.z * n);
}

_FORCE_INLINE_ Vector3i operator*(int n, const Vector3i & a) {
	return Vector3i(a.x * n, a.y * n, a.z * n);
}

_FORCE_INLINE_ Vector3i operator/(const Vector3i & a, int n) {
	return Vector3i(a.x / n, a.y / n, a.z / n);
}

_FORCE_INLINE_ bool operator==(const Vector3i & a, const Vector3i & b) {
	return a.x == b.x && a.y == b.y && a.z == b.z;
}

_FORCE_INLINE_ bool operator!=(const Vector3i & a, const Vector3i & b) {
	return a.x != b.x && a.y != b.y && a.z != b.z;
}

struct Vector3iHasher {
	static _FORCE_INLINE_ uint32_t hash(const Vector3i & v) {
		uint32_t hash = hash_djb2_one_32(v.x);
		hash = hash_djb2_one_32(v.y, hash);
		return hash_djb2_one_32(v.z, hash);
	}
};

#endif // VOXEL_VECTOR3I_H