src/Move.cpp

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/*
This file is part of Teapot Colony Wars.

Teapot Colony Wars 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.

Teapot Colony Wars 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 Teapot Colony Wars.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "Move.h"

#include <cstdlib>

#include "MoveIterator.h"

Move::Move(Move * next) : _next(next) {

}

Move::~Move(){
   delete _next; //Delete all the chain recursively
}

unsigned int Move::size() {
  Move * ptr = _next;
  unsigned int n = 1;
  while(ptr){
    ptr = ptr->_next;
    n++;
  }
  return n;
}

MoveIterator Move::begin() {
  MoveIterator m(this);
  return m;
}

MoveIterator Move::end() {
  MoveIterator m(NULL);
  return m;
}

std::pair<int,int> Move::getAbsCoords(move_command cmd, int i, int j) const {
  std::pair<int,int> result;

  if(cmd == getHandledMovement()){

    std::pair<int,int> relatives;
    relatives = getHandledRelCoords();
    result.first = i + relatives.first;
    result.second = j + relatives.second;

  } else if(_next){
    result = _next->getAbsCoords(cmd, i, j);
  } else {
    throw "Illegal move !";
  }
  return result;
}

std::pair<int,int> Move::getAbsCoords(int i, int j) const {
  return getAbsCoords(getHandledMovement(), i, j);
}

move_command Move::opposite(move_command cmd) const {
  move_command res;

  //Can we handle it ?
  if(cmd == getHandledMovement()){
    res = getHandledOpposite();
  } else if(_next){ //We can't, so we ask the next... if any
    res = _next->opposite(cmd);
  } else {
    throw "Illegal move !";
  }
  return res;
}

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