#ifndef ALAI_MAIN_H
#define ALAI_MAIN_H

#include <string>
#include <Godot.hpp>
#include <Input.hpp>
#include <Node.hpp>
#include <OS.hpp>
#include <PackedScene.hpp>
#include <ProjectSettings.hpp>
#include <Ref.hpp>
#include <ResourceLoader.hpp>

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

        private:
            /**
             * @brief OS singleton.
             * 
             */
            godot::OS *_os;
            /**
             * @brief Input singleton.
             * 
             */
            godot::Input *_input;
            /**
             * @brief ProjectSettings singleton.
             * 
             */
            godot::ProjectSettings *_project_settings;
            /**
             * @brief ResourceLoader singleton.
             * 
             */
            godot::ResourceLoader *_resource_loader;
            /**
             * @brief The default value for the game version.
             * 
             */
            inline static const std::string default_game_version = "0.1.0";
            /**
             * @brief The default value for if the game should start in full screen.
             * 
             */
            inline static const bool default_full_screen = false;
            /**
             * @brief The default resolution for the game window.
             * 
             */
            inline static const godot::Vector2 default_window_size = godot::Vector2(1280, 720);
            /**
             * @brief The default screen the the game should open on.
             * 
             * @details -1 opens it on the currently active screen. And 0 and above are the screens to use.
             */
            inline static const int8_t default_launch_screen = -1;
            /**
             * @brief The first level to load
             * 
             */
            godot::Ref<godot::PackedScene> level;
            /**
             * @brief The current version of the game.
             * 
             */
            godot::String game_version;
            /**
             * @brief If the window is full screen or not.
             * 
             */
            bool full_screen;
            /**
             * @brief The size of the window.
             * 
             */
            godot::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 level object.
             * 
             * @param[in] level The new level to load when starting.
             */
            void set_level(godot::Ref<godot::PackedScene> level);

            /**
             * @brief Get the level object.
             * 
             * @return Ref<PackedScene> The level scene to load.
             */
            godot::Ref<godot::PackedScene> get_level();

            /**
             * @brief Set the game version object.
             * 
             * @param[in] game_version The new version fo the game.
             */
            void set_game_version(godot::String game_version);

            /**
             * @brief Get the game version object.
             * 
             * @return String The current version of the game.
             */
            godot::String get_game_version();

            /**
             * @brief Set the full screen object.
             * 
             * @param[in] full_screen The new full screen state.
             */
            void set_full_screen(bool 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] window_size The new window size.
             */
            void set_window_size(godot::Vector2 window_size);

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

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

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

            /**
             * @brief Called when the monitor finishes loading.
             * 
             */
            void _on_monitor_loaded();

            /**
             * @brief Loads the monitor and adds it to the scene.
             * 
             */
            void load_monitor();

            /**
             * @brief Loads the selected level.
             * 
             */
            void load_level();
    };
}

#endif