/*
 *  ksokoban - a Sokoban game for TDE
 *  Copyright (C) 1998  Anders Widell  <d95-awi@nada.kth.se>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

#ifndef MAP_H
#define MAP_H

#include <assert.h>

#define MAX_X 49
#define MAX_Y 49

#define WALL   1
#define GOAL   2
#define OBJECT 4
#define FLOOR  8

class Map {
  friend class MapDelta;
  friend class LevelCollection;
public:
  Map();

  bool completed () const { return objectsLeft_ <= 0; }

  bool step   (int _x, int _y);
  bool push   (int _x, int _y);
  bool unstep (int _x, int _y);
  bool unpush (int _x, int _y);


  static bool badCoords (int _x, int _y) {
    return _x<0 || _y<0 || _x>MAX_X || _y>MAX_Y;
  }

  static bool badDelta (int _xd, int _yd) {
    return (_xd!=0 && _yd!=0) || (_xd==0 && _yd==0);
  }

  int xpos () const { return xpos_; }
  int ypos () const { return ypos_; }

  bool empty  (int x, int y) {
    assert (x>=0 && x<=MAX_X && y>=0 && y<=MAX_Y);
    return (currentMap_[y+1][x+1] & (WALL|OBJECT)) == 0;
  }
  bool wall   (int x, int y) {
    assert (x>=0 && x<=MAX_X && y>=0 && y<=MAX_Y);
    return (currentMap_[y+1][x+1] & WALL) != 0;
  }
  bool goal   (int x, int y) {
    assert (x>=0 && x<=MAX_X && y>=0 && y<=MAX_Y);
    return (currentMap_[y+1][x+1] & GOAL) != 0;
  }
  bool object (int x, int y) {
    assert (x>=0 && x<=MAX_X && y>=0 && y<=MAX_Y);
    return (currentMap_[y+1][x+1] & OBJECT) != 0;
  }
  bool floor (int x, int y) {
    assert (x>=0 && x<=MAX_X && y>=0 && y<=MAX_Y);
    return (currentMap_[y+1][x+1] & FLOOR) != 0;
  }

  bool wallUp    (int x, int y) {
    assert (x>=0 && x<=MAX_X && y>=0 && y<=MAX_Y);
    return (currentMap_[y  ][x+1] & WALL) != 0;
  }
  bool wallDown  (int x, int y) {
    assert (x>=0 && x<=MAX_X && y>=0 && y<=MAX_Y);
    return (currentMap_[y+2][x+1] & WALL) != 0;
  }
  bool wallLeft  (int x, int y) {
    assert (x>=0 && x<=MAX_X && y>=0 && y<=MAX_Y);
    return (currentMap_[y+1][x  ] & WALL) != 0;
  }
  bool wallRight (int x, int y) {
    assert (x>=0 && x<=MAX_X && y>=0 && y<=MAX_Y);
    return (currentMap_[y+1][x+2] & WALL) != 0;
  }

  void   printMap ();

  int width() const { return width_; }
  int height() const { return height_; }

protected:
  int map (int x, int y) {
    assert (x>=0 && x<=MAX_X && y>=0 && y<=MAX_Y);
    return currentMap_[y+1][x+1];
  }
  void map (int x, int y, int val);

  void setMap (int x, int y, int bits);
  void clearMap (int x, int y, int bits);
  void clearMap ();
  bool fillFloor (int x, int y);
  int objectsLeft () const { return objectsLeft_; }

  int xpos_, ypos_;

private:
  char currentMap_[MAX_Y+3][MAX_X+3];
  int width_, height_;
  int objectsLeft_;
};

#endif  /* MAP_H */