#include "function.h"
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>



unsigned short int **creatArea2D(const unsigned int N)
{
  unsigned short int **tab2d;
  tab2d = calloc(N, sizeof(unsigned short int* ));
  if (tab2d == NULL)
  {
    return NULL;
  }

  bool fail = false; 
  unsigned int i;
  for (i = 0; i < N && !fail; ++i)
  {
    tab2d[i] = calloc(N, sizeof(unsigned short int));
    if (tab2d[i] == NULL)
    {
      fail = true;
    }
  }

  if (fail)
  {
    unsigned int j;
    for (j = 0; j < i; ++j)
    {
      free(tab2d[j]);
    }
    free(tab2d);
    return NULL;
  }
  return tab2d;
}

short int canIGoDirection(short int valueOfNCase, short int valueOfNPlusOneCase)
{
    if(valueOfNCase!=WALL)
    {
        if((valueOfNCase==BOX && valueOfNPlusOneCase==EMPTY) ||( valueOfNCase==BOX && valueOfNPlusOneCase==TARGET))
        {
            
            if(valueOfNPlusOneCase==TARGET)
            {
                // Box on target
                return 3;
            } 
            //move the box
            return 2;
        }  
        if((valueOfNCase==BOX_ON_TARGET && valueOfNPlusOneCase==EMPTY )|| (valueOfNCase==BOX_ON_TARGET && valueOfNPlusOneCase==TARGET))
        {
            
            if(valueOfNPlusOneCase==TARGET)
            {
                // Box on target and player on target too
                return 6;
            } 
            //move the box but player on a target
            return 5;
        }  

        if(valueOfNCase==TARGET)
        {
            //move player on target
            return 4;
        }
        // move player
        return 1;
    }

    return 0;

}

void move(unsigned short int **tab,vect playerPos, vect direction)
{
    short int valueOfNCase=tab[playerPos.x+direction.x][playerPos.y+direction.y];
    short int valueOfNPlusOneCase=tab[playerPos.x+direction.x*2][playerPos.y+direction.y*2];

    short int returnValue = canIGoDirection(valueOfNCase,valueOfNPlusOneCase);
    short int playerState =tab[playerPos.x][playerPos.y];

    switch(returnValue)
    {
        case 0:
            break;
        case 1:
            //move player
            if(playerState==PLAYER_ON_TARGET){tab[playerPos.x][playerPos.y] = TARGET;}
            else{ tab[playerPos.x][playerPos.y] = EMPTY;} 
            tab[playerPos.x+direction.x][playerPos.y+direction.y] = PLAYER;
            break;
        case 2:
            //move player and the box
            if(playerState==PLAYER_ON_TARGET){tab[playerPos.x][playerPos.y] = TARGET;}
            else{ tab[playerPos.x][playerPos.y] = EMPTY;} 
            tab[playerPos.x+direction.x][playerPos.y+direction.y] = PLAYER;
            tab[playerPos.x+direction.x*2][playerPos.y+direction.y*2] = BOX;
            break;
        case 3:
            //move player and the box is well-placed
            if(playerState==PLAYER_ON_TARGET){tab[playerPos.x][playerPos.y] = TARGET;}
            else{ tab[playerPos.x][playerPos.y] = EMPTY;} 
            tab[playerPos.x+direction.x][playerPos.y+direction.y] = PLAYER;
            tab[playerPos.x+direction.x*2][playerPos.y+direction.y*2] = BOX_ON_TARGET;
            break;
        case 4:
            //move player on a target
            if(playerState==PLAYER_ON_TARGET){tab[playerPos.x][playerPos.y] = TARGET;}
            else{ tab[playerPos.x][playerPos.y] = EMPTY;} 
            tab[playerPos.x+direction.x][playerPos.y+direction.y] = PLAYER_ON_TARGET;
            break;
        case 5:
            //move box and player on a target
            if(playerState==PLAYER_ON_TARGET){tab[playerPos.x][playerPos.y] = TARGET;}
            else{ tab[playerPos.x][playerPos.y] = EMPTY;} 
            tab[playerPos.x+direction.x*2][playerPos.y+direction.y*2] = BOX;
            tab[playerPos.x+direction.x][playerPos.y+direction.y] = PLAYER_ON_TARGET;
            break;
        case 6:
            //move player on a target and box on a target
            if(playerState==PLAYER_ON_TARGET){tab[playerPos.x][playerPos.y] = TARGET;}
            else{ tab[playerPos.x][playerPos.y] = EMPTY;} 
            tab[playerPos.x+direction.x*2][playerPos.y+direction.y*2] = BOX_ON_TARGET;
            tab[playerPos.x+direction.x][playerPos.y+direction.y] = PLAYER_ON_TARGET;
            break;
        

    } 
    
    if(returnValue!=0)
    { 
        playerPos.x = playerPos.x+direction.x;
        playerPos.y = playerPos.y+direction.y;
    } 
}