/*
 *  Main authors:
 *     Guido Tack <tack@gecode.org>
 *     Christian Schulte <schulte@gecode.org>
 *
 *  Copyright:
 *     Guido Tack, 2004
 *     Christian Schulte, 2004
 *
 *  Last modified:
 *     $Date: 2006-04-11 15:58:37 +0200 (Tue, 11 Apr 2006) $ by $Author: tack $
 *     $Revision: 3188 $
 *
 *  This file is part of Gecode, the generic constraint
 *  development environment:
 *     http://www.gecode.org
 *
 *  See the file "LICENSE" for information on usage and
 *  redistribution of this file, and for a
 *     DISCLAIMER OF ALL WARRANTIES.
 *
 */

#include "gecode/set.hh"

#include "gecode/set/int.hh"
#include "gecode/set/rel.hh"

using namespace Gecode::Int;

namespace Gecode {

  void
  rel(Space* home, SetVar s, IntRelType r, IntVar x) {
    if (home->failed()) return;
    switch(r) {
    case IRT_EQ:
      {
	Gecode::Int::IntView xv(x);
	Set::SingletonView xsingle(xv);
	GECODE_ES_FAIL(home,
		       (Set::Rel::Eq<Set::SetView,Set::SingletonView>
			::post(home,s,xsingle)));

      }
      break;
    case IRT_NQ:
      {
	Gecode::Int::IntView xv(x);
	Set::SingletonView xsingle(xv);
	GECODE_ES_FAIL(home,
		       (Set::Rel::Distinct<Set::SetView,Set::SingletonView>
			::post(home,s,xsingle)));

      }
      break;
    case IRT_LQ:
      {
	IntVar tmp(home, Limits::Int::int_min, Limits::Int::int_max);
	rel(home, tmp, IRT_LQ, x);
	GECODE_ES_FAIL(home,Set::Int::MaxElement::post(home,s,tmp));
      }
      break;
    case IRT_LE:
      {
	IntVar tmp(home, Limits::Int::int_min, Limits::Int::int_max);
	rel(home, tmp, IRT_LE, x);
	GECODE_ES_FAIL(home,Set::Int::MaxElement::post(home,s,tmp));
      }
      break;
    case IRT_GQ:
      {
	IntVar tmp(home, Limits::Int::int_min, Limits::Int::int_max);
	rel(home, tmp, IRT_GQ, x);
	GECODE_ES_FAIL(home,Set::Int::MinElement::post(home,s,tmp));
      }
      break;
    case IRT_GR:
      {
	IntVar tmp(home, Limits::Int::int_min, Limits::Int::int_max);
	rel(home, tmp, IRT_GR, x);
	GECODE_ES_FAIL(home,Set::Int::MinElement::post(home,s,tmp));
      }
      break;
    }

  }

  void
  rel(Space* home, IntVar x, IntRelType r, SetVar s) {
    IntRelType rr;
    switch (r) {
    case IRT_LE: rr=IRT_GR; break;
    case IRT_LQ: rr=IRT_GQ; break;
    case IRT_GR: rr=IRT_LE; break;
    case IRT_GQ: rr=IRT_LQ; break;
    default: rr=r;
    }
    rel(home, s, rr, x);
  }

  void
  min(Space* home, SetVar s, IntVar x){
    if (home->failed()) return;
    GECODE_ES_FAIL(home,Set::Int::MinElement::post(home,s,x));
  }
  void
  max(Space* home, SetVar s, IntVar x){
    if (home->failed()) return;
    GECODE_ES_FAIL(home,Set::Int::MaxElement::post(home,s,x));
  }

  void
  match(Space* home, SetVar s, const IntVarArgs& x) {
    if (home->failed()) return;
    ViewArray<IntView> xa(home,x);
    GECODE_ES_FAIL(home,Set::Int::Match::post(home,s,xa));
  }

  void
  channel(Space* home, const IntVarArgs& x, const SetVarArgs& y) {
    if (home->failed()) return;
    ViewArray<Int::IntView> xa(home,x);
    ViewArray<Set::SetView> ya(home,y);
    GECODE_ES_FAIL(home,Set::Int::Channel::post(home,xa,ya));
  }

  void weights(Space* home, const IntArgs& elements, const IntArgs& weights,
	       SetVar x, IntVar y) {
    if (home->failed()) return;
    Set::SetView xv(x);
    Int::IntView yv(y);
    GECODE_ES_FAIL(home,Set::Int::Weights::post(home,elements,weights,x,y));
  }

}

// STATISTICS: set-post