#ifndef ALAI_MAIN_H
#define ALAI_MAIN_H

#include <Godot.hpp>
#include <Node.hpp>
#include <OS.hpp>
#include <Input.hpp>

/**
 * @brief If the game should be full screen or not by default.
 */
#define ALAI_MAIN_FULL_SCREEN false
/**
 * @brief The default size of the window.
 * @details This is ignored if full screen is true.
 */
#define ALAI_MAIN_WINDOW_SIZE Vector2(1280, 720)
/**
 * @brief Which screen to launch the game on.
 * @details If -1 it will launch the game on the "active" screen. Anything between 0 and N represents the screen number to show the game on when opened.
 */
#define ALAI_MAIN_LAUNCH_SCREEN -1

/**
 * @brief This is the godot namespace for all the code included in the library.
 * @details This namespace is used a prefix when the Godot engine looks for classes, methods, and properties.
 */
namespace godot
{
    /**
     * @brief This class controls the Main node.
     * @details The main node is responsible for controling the window and the game iteself is a child of it.
     */
    class Main : public Node
    {
        GODOT_CLASS(Main, Node)

        private:
            /**
             * @brief OS singleton.
             */
            OS *_os;
            /**
             * @brief Input singleton.
             */
            Input *_input;

            /**
             * @brief If the window is full screen or not.
             */
            bool full_screen;
            /**
             * @brief The size of the window.
             */
            Vector2 window_size;
            /**
             * @brief The screen to launch the game on.
             */
            int8_t launch_screen;

        public:
            /**
             * @brief This method registers classes with Godot.
             * @details This method registers methods, properties, and signals with the Godot engine.
             */
            static void _register_methods();

            /**
             * @brief Construct a new Main object.
             */
            Main();

            /**
             * @brief Destroy the Main object.
             */
            ~Main();

            /**
             * @brief Initialize the class from Godot.
             * @details This method is called just once when the Godot engine connects to the instance of the class.
             */
            void _init();

            /**
             * @brief Code to be run when ready.
             * @details This method is run when all the children of this node are ready.
             */
            void _ready();

            /**
             * @brief This class handles the physics processing.
             * @details Every delta time, this function is called to check for input and update positioning.
             * 
             * @param[in] delta The difference in time that passed since the last call to this method.
             */
            void _physics_process(float delta);

            /**
             * @brief Set the full screen object.
             * 
             * @param[in] new_full_screen The new full screen state.
             */
            void set_full_screen(bool new_full_screen);

            /**
             * @brief Get the full screen object.
             * 
             * @return true If full screen.
             * @return false If not full screen.
             */
            bool get_full_screen();

            /**
             * @brief Set the window size object.
             * 
             * @param[in] new_window_size The new window size.
             */
            void set_window_size(Vector2 new_window_size);

            /**
             * @brief Get the window size object.
             * 
             * @return Vector2 The window size.
             */
            Vector2 get_window_size();

            /**
             * @brief Set the launch screen object.
             * 
             * @param[in] new_launch_screen The launch screen to use.
             */
            void set_launch_screen(int8_t new_launch_screen);

            /**
             * @brief Get the launch screen object.
             * 
             * @return int8_t The launch screen.
             */
            int8_t get_launch_screen();
    };
}

#endif