#include "SDL/SDL.h"
#include <iostream>
#include <vector>

#define SCREEN_WIDTH  400
#define SCREEN_HEIGHT 200
#define SPRITE_SIZE    10

using namespace std;

vector<vector<int> > generateMap() {
  vector<vector<int> > vMap;
  int horizPos;
  int vertPos=rand()%(SCREEN_HEIGHT/SPRITE_SIZE);
  for(int i=0;i<(SCREEN_WIDTH/SPRITE_SIZE);i++) {
    vector<int> vSubmap;
    horizPos=i;
    for(int j=0;j<(SCREEN_HEIGHT/SPRITE_SIZE)-1;j++) {
      if(!vSubmap.empty()) {
        vSubmap.clear();
      }
      if(j<vertPos) {
        vSubmap.push_back(1);
      }
      else if(j==vertPos) {
        vSubmap.push_back(2);
      }
      else if(j>vertPos) {
        vSubmap.push_back(0);
      }
    }
    vMap.push_back(vSubmap);
  }
}

int main (int argc,char *argv[]) {
  SDL_Surface *screen, *temp;
  SDL_Rect rcTile;
  SDL_Event event;
  Uint8 *keystate;
  int gameRunning=1;

  SDL_Init(SDL_INIT_VIDEO);
  SDL_WM_SetCaption("SDL TILE TEST","");
  screen = SDL_SetVideoMode(SCREEN_WIDTH, SCREEN_HEIGHT, 0, 0);

  vector<vector<int> > tileMap;
  tileMap=generateMap();
  /*
  TileA     Sky
  TileB     Dirt
  TileC     Grass
  */

  temp=SDL_LoadBMP("sky.bmp");
  SDL_Surface *TileA =SDL_DisplayFormat(temp);
  SDL_FreeSurface(temp);

  temp=SDL_LoadBMP("dirt.bmp");
  SDL_Surface *TileB =SDL_DisplayFormat(temp);
  SDL_FreeSurface(temp);

  temp=SDL_LoadBMP("grass.bmp");
  SDL_Surface *TileC =SDL_DisplayFormat(temp);
  SDL_FreeSurface(temp);

  while (gameRunning) {
    if (SDL_PollEvent(&event)) {
      switch (event.type) {
        case SDL_QUIT:
          gameRunning=0;
          break;
        case SDL_KEYDOWN:
          switch (event.key.keysym.sym) {
            case SDLK_ESCAPE:
            case SDLK_q:
              gameRunning=0;
              break;
          }
          break;
      }
    }

    /*
    keystate = SDL_GetKeyState(NULL);
    if (keystate[SDLK_LEFT] ) {
      //doshit
    }*/


    for (int x = 0; x < SCREEN_WIDTH / SPRITE_SIZE; x++) {
      for (int y = 0; y < SCREEN_HEIGHT / SPRITE_SIZE; y++) {
        rcTile.x = x * SPRITE_SIZE;
        rcTile.y = y * SPRITE_SIZE;
        if(tileMap[x][y]==0) {
          SDL_BlitSurface(TileA,NULL,screen,&rcTile);
        }
        else if(tileMap[x][y]==1) {
          SDL_BlitSurface(TileB,NULL,screen,&rcTile);
        }
        else if(tileMap[x][y]==2) {
          SDL_BlitSurface(TileC, NULL, screen, &rcTile);
        }
      }
    }
    /* draw the sprite */
    // SDL_BlitSurface(TileA, NULL, screen, &rcTileA);

    /* update the screen */
    SDL_UpdateRect(screen, 0, 0, 0, 0);
  }

  /* clean up */
  SDL_FreeSurface(TileA);
  SDL_FreeSurface(TileB);
  SDL_FreeSurface(TileC);
  SDL_Quit();
  return 0;
}