#include <SDL.h>

SDL_Window*     window;
SDL_Renderer*   renderer;
SDL_Surface*    surface;
SDL_Texture*    font;


const int screenWidth = 800;
const int screenHeight = 600;

int throw_sdl_err(const char* fmt)
{
  SDL_LogError(
    SDL_LOG_CATEGORY_APPLICATION,
    fmt,
    SDL_GetError()
  );
  return 3;
}

int initWindow(void){
  if (SDL_Init(SDL_INIT_VIDEO) < 0) {
    return throw_sdl_err("Could not init the SDL: %s");
  }
  if (SDL_CreateWindowAndRenderer(screenWidth, screenHeight, SDL_WINDOW_OPENGL, &window, &renderer)) {
    return throw_sdl_err("Could not create new window and renderer: %s");
  }
  SDL_SetWindowPosition(window, SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED);
  SDL_SetWindowTitle(window, "Fanta 0.1");
  return 0;
}

int loadFont(void){
  surface = SDL_LoadBMP("imgs/font.bmp");
  if (!surface) {
    return throw_sdl_err("Could not load BMP image: %s");
  }
  font = SDL_CreateTextureFromSurface(renderer, surface);
  if (!font) {
    return throw_sdl_err("Could not create new texture from surface: %s");
  }
  SDL_FreeSurface(surface);
  return 0;
}

int loadBackgroundColor(void){
  SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
  SDL_RenderClear(renderer);
  return 0;
}

void putChar(int x, int y, int size, char value){

  if (value=='a'){
   SDL_Rect srcrect = {0, 0, 14, 14};
   SDL_Rect dstrect = {x, y, size, size};
   SDL_RenderCopy(renderer, font, &srcrect, &dstrect);
  }

  if (value=='b'){
   SDL_Rect srcrect = {16, 0, 14, 14};
   SDL_Rect dstrect = {x, y, size, size};
   SDL_RenderCopy(renderer, font, &srcrect, &dstrect);
  }

  if (value=='c'){
   SDL_Rect srcrect = {32, 0, 14, 14};
   SDL_Rect dstrect = {x, y, size, size};
   SDL_RenderCopy(renderer, font, &srcrect, &dstrect);
  }

  if (value=='d'){
   SDL_Rect srcrect = {48, 0, 14, 14};
   SDL_Rect dstrect = {x, y, size, size};
   SDL_RenderCopy(renderer, font, &srcrect, &dstrect);
  }

  if (value=='e'){
   SDL_Rect srcrect = {64, 0, 14, 14};
   SDL_Rect dstrect = {x, y, size, size};
   SDL_RenderCopy(renderer, font, &srcrect, &dstrect);
  }
  
  if (value=='f'){
   SDL_Rect srcrect = {80, 0, 14, 14};
   SDL_Rect dstrect = {x, y, size, size};
   SDL_RenderCopy(renderer, font, &srcrect, &dstrect);
  }

  if (value=='g'){
   SDL_Rect srcrect = {96, 0, 14, 14};
   SDL_Rect dstrect = {x, y, size, size};
   SDL_RenderCopy(renderer, font, &srcrect, &dstrect);
  }

  if (value=='h'){
   SDL_Rect srcrect = {112, 0, 14, 14};
   SDL_Rect dstrect = {x, y, size, size};
   SDL_RenderCopy(renderer, font, &srcrect, &dstrect);
  }

  if (value=='i'){
   SDL_Rect srcrect = {128, 0, 14, 14};
   SDL_Rect dstrect = {x, y, size, size};
   SDL_RenderCopy(renderer, font, &srcrect, &dstrect);
  }
  
  if (value=='j'){
   SDL_Rect srcrect = {144, 0, 14, 14};
   SDL_Rect dstrect = {x, y, size, size};
   SDL_RenderCopy(renderer, font, &srcrect, &dstrect);
  }
  
  if (value=='k'){
   SDL_Rect srcrect = {160, 0, 14, 14};
   SDL_Rect dstrect = {x, y, size, size};
   SDL_RenderCopy(renderer, font, &srcrect, &dstrect);
  }

  if (value=='l'){
   SDL_Rect srcrect = {176, 0, 14, 14};
   SDL_Rect dstrect = {x, y, size, size};
   SDL_RenderCopy(renderer, font, &srcrect, &dstrect);
  }

  if (value=='m'){
   SDL_Rect srcrect = {192, 0, 14, 14};
   SDL_Rect dstrect = {x, y, size, size};
   SDL_RenderCopy(renderer, font, &srcrect, &dstrect);
  }

  if (value=='n'){
   SDL_Rect srcrect = {208, 0, 14, 14};
   SDL_Rect dstrect = {x, y, size, size};
   SDL_RenderCopy(renderer, font, &srcrect, &dstrect);
  }

  if (value=='o'){
   SDL_Rect srcrect = {224, 0, 14, 14};
   SDL_Rect dstrect = {x, y, size, size};
   SDL_RenderCopy(renderer, font, &srcrect, &dstrect);
  }

  if (value=='p'){
   SDL_Rect srcrect = {240, 0, 14, 14};
   SDL_Rect dstrect = {x, y, size, size};
   SDL_RenderCopy(renderer, font, &srcrect, &dstrect);
  }

  if (value=='q'){
   SDL_Rect srcrect = {256, 0, 14, 14};
   SDL_Rect dstrect = {x, y, size, size};
   SDL_RenderCopy(renderer, font, &srcrect, &dstrect);
  }

  if (value=='r'){
   SDL_Rect srcrect = {272, 0, 14, 14};
   SDL_Rect dstrect = {x, y, size, size};
   SDL_RenderCopy(renderer, font, &srcrect, &dstrect);
  }

  if (value=='s'){
   SDL_Rect srcrect = {288, 0, 14, 14};
   SDL_Rect dstrect = {x, y, size, size};
   SDL_RenderCopy(renderer, font, &srcrect, &dstrect);
  }

  if (value=='t'){
   SDL_Rect srcrect = {304, 0, 14, 14};
   SDL_Rect dstrect = {x, y, size, size};
   SDL_RenderCopy(renderer, font, &srcrect, &dstrect);
  }

  if (value=='u'){
   SDL_Rect srcrect = {0, 17, 14, 14};
   SDL_Rect dstrect = {x, y, size, size};
   SDL_RenderCopy(renderer, font, &srcrect, &dstrect);
  }

  if (value=='v'){
   SDL_Rect srcrect = {16, 17, 14, 14};
   SDL_Rect dstrect = {x, y, size, size};
   SDL_RenderCopy(renderer, font, &srcrect, &dstrect);
  }

  if (value=='w'){
   SDL_Rect srcrect = {32, 17, 14, 14};
   SDL_Rect dstrect = {x, y, size, size};
   SDL_RenderCopy(renderer, font, &srcrect, &dstrect);
  }

  if (value=='x'){
   SDL_Rect srcrect = {48, 17, 14, 14};
   SDL_Rect dstrect = {x, y, size, size};
   SDL_RenderCopy(renderer, font, &srcrect, &dstrect);
  }
  
  if (value=='y'){
   SDL_Rect srcrect = {64, 17, 14, 14};
   SDL_Rect dstrect = {x, y, size, size};
   SDL_RenderCopy(renderer, font, &srcrect, &dstrect);
  }  

  if (value=='z'){
   SDL_Rect srcrect = {80, 17, 14, 14};
   SDL_Rect dstrect = {x, y, size, size};
   SDL_RenderCopy(renderer, font, &srcrect, &dstrect);
  }  


}

int destroy(void){
  SDL_DestroyTexture(font);
  SDL_DestroyRenderer(renderer);
  SDL_DestroyWindow(window);
  SDL_Quit();
  return 0;
}