#include <SDL/SDL_image.h>
#include <SDL/SDL.h>
#include <fstream>
#include <cstring>
#include <sstream>
#include "world.h"
#include "gamedata.h"
#include "log.h"

using namespace std;

#define WORLD_W 40
#define WORLD_H 30


WORLD world[40][30];
     
bool InitWorld()
{
     SDL_Surface *grass = IMG_Load("map.gif");
     SDL_Surface *water = IMG_Load("water.gif");
     SDL_Surface *tree1 = IMG_Load("tree1.gif");
     SDL_Surface *tree2 = IMG_Load("tree2.gif");
     SDL_Surface *warp = IMG_Load("warp.gif");
     
     
     ifstream file_in(gamedata.Map_Name.c_str());
     
     if(!file_in)
     return false;
     
     int x = 0;
     int y = 0;
     
     char tile;
     while(y != WORLD_H)
     {
             file_in >> tile;
             
             switch(tile)
             {
                         case '0':
                              world[x][y].image = grass;
                              world[x][y].value = 0;
                              break;
                         case '1':
                              world[x][y].image = water;
                              world[x][y].value = 1;
                              break;
                         case '2':
                              world[x][y].image = tree1;
                              world[x][y].value = 1;
                              break;
                         case '3':
                              world[x][y].image = tree2;
                              world[x][y].value = 1;
                              break;
                         case '4':
                              world[x][y].image = warp;
                              world[x][y].value = 0;
                              gamedata.wX = x * 20;
                              gamedata.wY = y * 20;
                              break;
                         default:
                                 file_in.close();
                                 return false;
                                 break;
             }
             world[x][y].x = x*20;
             world[x][y].y = y*20;
             x++;
             if(x == WORLD_W)
             {
                  x = 0;
                  y++;
             }
     }
     file_in.close();
     logfile.Write("Loaded " + gamedata.Map_Name + " into the system");
     return true;        
}

void DisplayWorld()
{
     for(int j = 0; j < WORLD_H; j++)
     {
             for(int i = 0; i < WORLD_W; i++)
             {
                     SDL_Rect rect;
                     rect.x = world[j].x;
                     rect.y = world[j].y;
                     SDL_BlitSurface(world[j].image, NULL, gamedata.screen, &rect);
             }
     }
     logfile.Write("Displayed " + gamedata.Map_Name + " onto the screen");
}

string ToString(int number)
{
    stringstream temp;
    temp << number;
    return temp.str();
}  

void ChangeWorld(int x)
{
     string number = ToString(x);
     string world = "worlds/world" + number;
     gamedata.Map_Name = world + ".txt";
     logfile.Write("--------------------------------");
     logfile.Write("Changed worlds to: " + gamedata.Map_Name);
     logfile.Write("--------------------------------");
     InitWorld();
     DisplayWorld();    
}