#include "core.hpp"

struct QuadrantCoords {
	long x;
	long y;
};

struct Entity {
	float orientation;
	Vector2 speed;
	Vector2 localPosition;
	QuadrantCoords quadrantPosition;
};

struct SpaceshipEntity {
	Entity entity;
	float delayedOrientation;
	Texture fusilageTexture;
	Texture enginesTexture;
};

Vector2 const AddEntityForce(Entity& entity, float const direction, float const magnitude) {
	constexpr float MAGNITUDE_MAX = 0.1f;
	Vector2 const appliedForce = LengthDirection(Vector2{magnitude, magnitude}, direction);
	entity.speed = (entity.speed + appliedForce);

	return appliedForce;
}

void RemoveEntityForce(Entity& entity, float const magnitude) {
	constexpr float MIN_DRIFT = 0.001f;
	// As LengthDirection deals in vector math, the magnitude will have to be converted from a one-
	// dimensional value into a two-dimensional one. Additionally, this magnitude vector needs its
	// x and y flipping according to the relative x and y values of the subject Entity.
	Vector2 const relativeMagnitude = {
		(magnitude * (SIGN(entity.speed.x) * -1)),
		(magnitude * (SIGN(entity.speed.y) * -1))
	};

	// Only deduct the maximum possible deductable speed before the value would inverse on itself.
	entity.speed = (entity.speed + Vector2{
		(entity.speed.x < 0.0f) ? MAX(relativeMagnitude.x, entity.speed.x) :
				MIN(relativeMagnitude.x, entity.speed.x),

		(entity.speed.y < 0.0f) ? MAX(relativeMagnitude.y, entity.speed.y) :
				MIN(relativeMagnitude.y, entity.speed.y)
	});
}