#pragma once
#include "J3ML/LinearAlgebra/Vector2.hpp"
#include <vector>

class Entity {
protected:
    std::vector<Entity*> children{};
    Vector2 position = {0, 0};
    // Assuming 0 radians is up.
    float face_angle = 0.0f;
    void UpdateChildren();
public:
    // Movements independent of the rotation.
    void MoveX(float speed);
    void MoveY(float speed);

    // Movements dependent on face angle.
    void MoveForward(float speed);
    void MoveBackward(float speed);
    void MoveLeft(float speed);
    void MoveRight(float speed);

    void Rotate(float speed);
    void SetRotation(float new_rotation);

    [[nodiscard]] bool AppendChild(Entity* entity);
    void DestroyChild(Entity* entity);
    void RemoveChild(Entity* entity);
public:
    [[nodiscard]] float GetRotation() const;
    [[nodiscard]] Vector2 GetPosition() const;
public:
    virtual void Update() {}
public:
    explicit Entity(const Vector2& position, float rotation = 0.0f) : position(position), face_angle(rotation) {}
    virtual ~Entity();
};