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+/* ****************************************************************************
+  This file is part of the game 'KJumpingCube'
+
+  Copyright (C) 1998-2000 by Matthias Kiefer
+                            <matthias.kiefer@gmx.de>
+
+  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 BRAIN_H
+#define BRAIN_H
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <krandomsequence.h>
+
+#include "cubebox.h"
+
+/** @internal */
+struct coordinate
+{
+   int row;
+   int column;
+   
+   int val;
+};
+
+
+/**
+* Class Brain computes a (good) possibility to move
+* for a given playingfield.
+* 
+* It puts a value on every cube by looking at its neighbours
+* and searches the best cubes to move. It then simulates what would 
+* happen, if you would click on these cubes. This is done recursively 
+* to a certain depth and the playingfield will be valued. 
+* 
+* @short The games brain
+*/
+class Brain
+{
+public:
+   /** 
+   * @param initValue value to initialize the random number generator with
+   *        if no value is given a truly random value is used
+   */
+   Brain(int initValue=0);
+
+   /**
+   * Computes a good possible move at the given field.
+   * The index of this Cube is stored in given 'row' and 'column' 
+   * 
+   * @return false if computing was stopped
+   * @see Brain#stop;  
+   */
+   bool getHint(int& row, int& column, CubeBox::Player player, CubeBox field);
+   
+   /** stops thinking */
+   void stop();
+   /** @return true if the Brain is thinking at the moment */
+   bool isActive() const;
+
+   /** skill according to Prefs::EnumSkill **/
+   void setSkill(int);
+   int skill() const;
+   
+private:
+   /**
+   * checks if a move is possible at cube row,column from player 'player' and
+   * simulates this move. Then it checks the new playingfield for possible moves
+   * and calls itself for every possible move until the maximum depth 'maxLevel'
+   * is reached.
+   *
+   * If the maximum depth is reached, it puts a value on the playingfield and returns this.
+   * @see CubeBox#simulateMove
+   * @see CubeBox#assessField
+   * @see Brain#findCubes2Move
+   *
+   * @param row,column coordinates of cube to increase
+   * @param player for which player the cube has to be increased
+   * @param box playingfield to do the moves on
+   * @return the value put on the field
+   */
+    double doMove(int row,int column,CubeBox::Player player, CubeBox box);
+   /**
+   * Checks the given playingfield, which cubes are favourable to do a move
+   * by checking every cubes neighbours. And looking for the difference to overflow.
+   *
+   * @param c2m Array in which the coordinates of the best cubes to move will be stored
+   * @param player for which player to check
+   * @param box playingfield to check
+   * @param debug if debugmessages should be printed
+   * @return number of found cubes to move
+   */
+   int findCubes2Move(coordinate* c2m,CubeBox::Player player,CubeBox& box);
+   /**
+   *
+   */
+   int assessCube(int row,int column,CubeBox::Player,CubeBox& box) const;
+   int getDiff(int row,int column, CubeBox::Player player, CubeBox& box) const;
+
+   /** current depth of recursive simulating of the moves */
+   int currentLevel;
+   /** maximum depth of recursive thinking */
+   int maxLevel;
+   /** the player for which to check the moves */
+   CubeBox::Player currentPlayer;
+	
+	
+   /** flag, if the engine has to be stopped */
+   bool stopped;
+   /** flag, if the engine is active */
+   bool active;
+   /** skill of the Brain, see Prefs::EnumSkill */
+   int _skill;
+
+   /** Sequence generator */
+   KRandomSequence random;    
+};
+
+#endif //BRAIN_H