#include <SDL2/SDL.h>
#include <stdbool.h>
#include <stdint.h>

int main(int argc, char *argv[])
{

    /* ***************************************************************
     *
     * GAME Struct
     *
     * ***************************************************************/
    bool            gameover = false;
    const int       screen_width = 1280;
    const int       screen_height = 720;
    uint8_t         r = 0;
    uint8_t         g = 0;
    uint8_t         b = 0;
    uint32_t        argb = 0;
    SDL_Window    * window = NULL;
    SDL_Renderer  * renderer = NULL;
    SDL_Surface   * screen = NULL;
    SDL_Event     * event = NULL;;

    /* ***************************************************************
     *
     * GAME INIT
     *
     * ***************************************************************/
    int retval;
    retval = SDL_Init(SDL_INIT_EVERYTHING);
    if(retval < 0)
    {
        SDL_LogError (SDL_LOG_CATEGORY_APPLICATION, "SDL_Init: %s\n", SDL_GetError());
        exit(EXIT_FAILURE);
    }
    atexit(SDL_Quit);


    window = SDL_CreateWindow("Game: Init",
            SDL_WINDOWPOS_UNDEFINED,
            SDL_WINDOWPOS_UNDEFINED,
            screen_width,
            screen_height,
            0);
    if(!window)
    {
        SDL_LogError (SDL_LOG_CATEGORY_APPLICATION, "SDL_CreateWindow: %s\n", SDL_GetError());
        exit(EXIT_FAILURE);
    }

    renderer = SDL_CreateRenderer(window, -1, 0);
    if(!renderer)
    {
        SDL_LogError (SDL_LOG_CATEGORY_APPLICATION, "SDL_CreateRenderer: %s\n", SDL_GetError());
        exit(EXIT_FAILURE);
    }

    SDL_RendererInfo info;
    SDL_GetRendererInfo(renderer, &info );
    SDL_Log("Renderer Name: %s\n", info.name);

    SDL_Log("Texture formats: \n");
    for (size_t i = 0; i < info.num_texture_formats; i++) {
        SDL_Log("%s\n", SDL_GetPixelFormatName(info.texture_formats[i]));
    }

    // Do not work with Renderer.. at docs
    // screen = SDL_GetWindowSurface(window);
    // if(!screen)
    // {
    //     SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_GetWindowSurface: %s\n", SDL_GetError ());
    //     exit(EXIT_FAILURE);
    // }

    event = malloc(sizeof (*event));


    /* ***************************************************************
     *
     * Main Loop
     *
     * ***************************************************************/
    while(!gameover)
    {
        /* ***************************************************************
         *
         * Handle Input
         *
         * ***************************************************************/
        while(SDL_PollEvent(event))
        {
            switch(event->type)
            {
                case SDL_QUIT: gameover = true; break;
                case SDL_KEYDOWN: switch(event->key.keysym.sym)
                {
                    case SDLK_ESCAPE: gameover = true; break;
                }
            }
        }

        /* ***************************************************************
         *
         * Game Update
         *
         * ***************************************************************/
        r = (argb)       & 0xff;
        g = (argb >> 8)  & 0xff;
        b = (argb >> 16) & 0xff;
        argb++;

        /* ***************************************************************
         *
         * Game Render
         *
         * ***************************************************************/
        retval = SDL_SetRenderDrawColor (renderer, r, g, b, 255);
        if(retval < 0)
        {
            SDL_Log("SDL_SetRenderDrawColor: %s\n", SDL_GetError());
            exit(EXIT_FAILURE);
        }

        retval = SDL_RenderClear(renderer);
        if(retval < 0)
        {
            SDL_Log("SDL_RenderClear: %s\n", SDL_GetError());
            exit(EXIT_FAILURE);
        }

        SDL_RenderPresent(renderer);
    }

    if(renderer)
    {
        SDL_Log("Destroying renderer()\n");
        SDL_DestroyRenderer(renderer);
        renderer = NULL;
    }


    if(window != NULL)
    {
        SDL_Log("Destroying main window()\n");
        SDL_DestroyWindow (window);
        window = NULL;
        screen = NULL;
    }

    SDL_Log("Exiting\n");
    return 0;
}