#include "math/vector.h"
#include <cmath>

using namespace engine::math;

Vector2::Vector2() {
}

Vector2::Vector2(float x, float y) : x{x}, y{y} {
}

bool Vector2::operator==(Vector2 other) const {
    return x == other.x && y == other.y;
}

bool Vector2::operator!=(Vector2 other) const {
    return !(*this == other);
}

Vector2 Vector2::operator+() const {
    return *this;
}

Vector2 Vector2::operator-() const {
    return { -x, -y };
}

Vector2 Vector2::operator+(Vector2 other) const {
    return { x + other.x, y + other.y };
}

Vector2 Vector2::operator-(Vector2 other) const {
    return *this + (-other);
}

float Vector2::det(Vector2 other) const {
    return this->x * other.y - other.x * this->y;
}

Vector2 Vector2::round() const {
    return { std::round(x), std::round(y) };
}

Vector2 engine::math::operator*(float n, Vector2 other) {
    return { n * other.x, n * other.y };
}

Vector2 engine::math::operator*(Vector2 other, float n) {
    return n * other;
}

Vector2 engine::math::operator/(Vector2 other, float n) {
    return { other.x / n, other.y / n };
}

Vector3::Vector3() {
}

Vector3::Vector3(float x, float y, float z) : x{x}, y{y}, z{z} {
}

bool Vector3::operator==(Vector3 other) const {
    return x == other.x && y == other.y && z == other.z;
}

bool Vector3::operator!=(Vector3 other) const {
    return !(*this == other);
}

Vector3 Vector3::operator+() const {
    return *this;
}

Vector3 Vector3::operator-() const {
    return { -x, -y, -z };
}

Vector3 Vector3::operator+(Vector3 other) const {
    return { x + other.x, y + other.y, z + other.z };
}

Vector3 Vector3::operator-(Vector3 other) const {
    return *this + (-other);
}

Vector3 Vector3::round() const {
    return { std::round(x), std::round(y), std::round(z) };
}

Vector3 Vector3::cross(Vector3 other) const {
    return {
        y * other.z - z * other.y,
        z * other.x - x * other.z,
        x * other.y - y * other.x
    };
}

Vector3 engine::math::operator*(float n, Vector3 other) {
    return { n * other.x, n * other.y, n * other.z };
}

Vector3 engine::math::operator*(Vector3 other, float n) {
    return n * other;
}

Vector3 engine::math::operator/(Vector3 other, float n) {
    return { other.x / n, other.y / n, other.z / n };
}

Vector4::Vector4() {
}

Vector4::Vector4(float x, float y, float z, float w) : x{x}, y{y}, z{z}, w{w} {
}

Vector4::Vector4(float x, float y, float z) : x{x}, y{y}, z{z}, w{1.f} {
}

Vector4::Vector4(Vector3 v, float w) : x{v.x}, y{v.y}, z{v.z}, w{w} {
}

Vector4::Vector4(Vector3 v) : x{v.x}, y{v.y}, z{v.z}, w{1.f} {
}

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

bool Vector4::operator!=(Vector4 other) const {
    return !(*this == other);
}

Vector4 Vector4::operator+() const {
    return *this;
}

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

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

Vector4 Vector4::operator-(Vector4 other) const {
    return *this + (-other);
}

Vector4 Vector4::round() const {
    return { std::round(x), std::round(y), std::round(z), std::round(w) };
}

Vector2 Vector4::xy() const {
    return { x, y };
}

Vector3 Vector4::xyz() const {
    return { x, y, z };
}

Vector4 Vector4::div_by_w() const {
    return {x / w, y / w, z / w, w};
}

Vector4 engine::math::operator*(float n, Vector4 other) {
    return { n * other.x, n * other.y, n * other.z, n * other.w };
}

Vector4 engine::math::operator*(Vector4 other, float n) {
    return n * other;
}

Vector4 engine::math::operator/(Vector4 other, float n) {
    return { other.x / n, other.y / n, other.z / n, other.w / n };
}