#include <client/Bullet.h>

#include <godot_cpp/classes/engine.hpp>
#include <godot_cpp/classes/geometry_instance3d.hpp>
#include <godot_cpp/classes/physics_direct_space_state3d.hpp>
#include <godot_cpp/classes/physics_ray_query_parameters3d.hpp>
#include <godot_cpp/classes/timer.hpp>
#include <godot_cpp/classes/world3d.hpp>
#include <godot_cpp/variant/utility_functions.hpp>

namespace blitz {

using namespace godot;

static constexpr float SPEED = 20.0f;
static constexpr float MaxAlive = 10.0f;

void Bullet::_bind_methods() {}

Bullet::Bullet() : m_Stuck(false) {}

void Bullet::_ready() {
	Timer* timer = memnew(Timer);
	add_child(timer);
	timer->connect("timeout", callable_mp(this, &Bullet::Destroy));
	timer->set_wait_time(MaxAlive);
	timer->start();
}

Bullet::~Bullet() {}

void Bullet::_process(float a_Delta) {
	if (Engine::get_singleton()->is_editor_hint()) {
		return;
	}

	auto* head = get_node<Node3D>("Armature");

	if (m_Stuck)
		return;

	Vector3 start = get_position();
	Vector3 finish = start + get_transform().basis.xform(Vector3{0, 0, -SPEED * a_Delta});

	auto query = PhysicsRayQueryParameters3D::create(start, finish, 1);
	auto result = get_world_3d()->get_direct_space_state()->intersect_ray(query);

	if (result.is_empty()) {
		set_position(finish);
		return;
	}

	m_Stuck = true;
	Vector3 intersectPoint = result["position"];

	head->set_global_position(intersectPoint);
}

void Bullet::Destroy() {
	queue_free();
}

}  // namespace blitz