/*
 * Copyright 2022 Frederico de Oliveira Linhares
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef CANDY_GEAR_CORE_H
#define CANDY_GEAR_CORE_H 1

#include <mruby.h>
#include <mruby/class.h>
#include <mruby/compile.h>
#include <mruby/data.h>
#include <mruby/dump.h>
#include <mruby/variable.h>

#include <SDL2/SDL.h>
#include <SDL2/SDL_image.h>
#include <SDL2/SDL_mixer.h>
#include <SDL2/SDL_ttf.h>

#include "loader.h"

#ifdef __cplusplus
extern "C" {
#endif

/**
 * The Core class stores all global states that the engine needs to work.
 * Global variables are not evil if you use them carefully.
 */
typedef struct
{
  const char *config_file;

  /// Text displayed in the game window.
  char *game_name;

  /**
   * @{
   * This is the amount of pixel the games use to render a buffer. The image in
   * this buffer is then rendered to the screen.
   */
  int game_width, game_height;
  /// @}

  /**
   * @{
   * This is the ammount of pixel that the games uses when rendering to the
   * screen.
   */
  int screen_width, screen_height;
  /// @}

  Uint32 fps;
  Uint32 max_frame_duration_ms;

  SDL_Window *window;
  SDL_Renderer *renderer;

  /// All rendering goes here before they are moved to the screen.
  SDL_Texture *pre_screen_buffer;
  SDL_Rect screen_rect;

  SDL_bool quit_game;
} cg_sCore;

extern cg_sCore cg_core;

/// \memberof cg_sCore @{

void
cg_Core_init(LoaderStack *loader);

SDL_bool
cg_Core_load(LoaderStack *loader);

void
cg_Core_unload(LoaderStack *loader);

/// @}

#ifdef __cplusplus
};
#endif

#endif /* CANDY_GEAR_CORE_H */