/* -*- C++ -*-

 *

 * This file is a part of LEMON, a generic C++ optimization library

 *

 * Copyright (C) 2003-2008

 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport

 * (Egervary Research Group on Combinatorial Optimization, EGRES).

 *

 * Permission to use, modify and distribute this software is granted

 * provided that this copyright notice appears in all copies. For

 * precise terms see the accompanying LICENSE file.

 *

 * This software is provided "AS IS" with no warranty of any kind,

 * express or implied, and with no claim as to its suitability for any

 * purpose.

 *

 */

#ifndef LEMON_TEST_TEST_TOOLS_H

#define LEMON_TEST_TEST_TOOLS_H

#include <iostream>

#include <vector>

#include <cstdlib>

#include <ctime>

#include <lemon/concept_check.h>

#include <lemon/concepts/digraph.h>

#include <lemon/random.h>

using namespace lemon;

//! \ingroup misc

//! \file

//! \brief Some utilities to write test programs.

///If \c rc is fail, writes an error message end exit.

///If \c rc is fail, writes an error message end exit.

///The error message contains the file name and the line number of the

///source code in a standard from, which makes it possible to go there

///using good source browsers like e.g. \c emacs.

///

///For example

///\code check(0==1,"This is obviously false.");\endcode will

///print this (and then exits).

///\verbatim digraph_test.cc:123: error: This is obviously false. \endverbatim

///

///\todo It should be in \c error.h

#define check(rc, msg) \

  if(!(rc)) { \

    std::cerr << __FILE__ ":" << __LINE__ << ": error: " << msg << std::endl; \

    abort(); \

  } else { } \

///Structure returned by \ref addPetersen().

///Structure returned by \ref addPetersen().

///

template<class Digraph> struct PetStruct

{

  ///Vector containing the outer nodes.

  std::vector<typename Digraph::Node> outer;

  ///Vector containing the inner nodes.

  std::vector<typename Digraph::Node> inner;

  ///Vector containing the arcs of the inner circle.

  std::vector<typename Digraph::Arc> incir;

  ///Vector containing the arcs of the outer circle.

  std::vector<typename Digraph::Arc> outcir;

  ///Vector containing the chord arcs.

  std::vector<typename Digraph::Arc> chords;

};

///Adds a Petersen digraph to \c G.

///Adds a Petersen digraph to \c G.

///\return The nodes and arcs of the generated digraph.

template<typename Digraph>

PetStruct<Digraph> addPetersen(Digraph &G,int num = 5)

{

  PetStruct<Digraph> n;

  for(int i=0;i<num;i++) {

    n.outer.push_back(G.addNode());

    n.inner.push_back(G.addNode());

  }

 for(int i=0;i<num;i++) {

   n.chords.push_back(G.addArc(n.outer[i],n.inner[i]));

   n.outcir.push_back(G.addArc(n.outer[i],n.outer[(i+1) % num]));

   n.incir.push_back(G.addArc(n.inner[i],n.inner[(i+2) % num]));

  }

 return n;

}

/// \brief Adds to the digraph the reverse pair of all arcs.

///

/// Adds to the digraph the reverse pair of all arcs.

///

template<class Digraph> void bidirDigraph(Digraph &G)

{

  typedef typename Digraph::Arc Arc;

  typedef typename Digraph::ArcIt ArcIt;

  std::vector<Arc> ee;

  for(ArcIt e(G);e!=INVALID;++e) ee.push_back(e);

  for(typename std::vector<Arc>::iterator p=ee.begin();p!=ee.end();p++)

    G.addArc(G.target(*p),G.source(*p));

}

/// \brief Checks the bidirectioned Petersen digraph.

///

///  Checks the bidirectioned Petersen digraph.

///

template<class Digraph> void checkBidirPetersen(Digraph &G, int num = 5)

{

  typedef typename Digraph::Node Node;

  typedef typename Digraph::ArcIt ArcIt;

  typedef typename Digraph::NodeIt NodeIt;

  checkDigraphNodeList(G, 2 * num);

  checkDigraphArcList(G, 6 * num);

  for(NodeIt n(G);n!=INVALID;++n) {

    checkDigraphInArcList(G, n, 3);

    checkDigraphOutArcList(G, n, 3);

  }  

}

///Structure returned by \ref addUPetersen().

///Structure returned by \ref addUPetersen().

///

template<class Digraph> struct UPetStruct

{

  ///Vector containing the outer nodes.

  std::vector<typename Digraph::Node> outer;

  ///Vector containing the inner nodes.

  std::vector<typename Digraph::Node> inner;

  ///Vector containing the arcs of the inner circle.

  std::vector<typename Digraph::Edge> incir;

  ///Vector containing the arcs of the outer circle.

  std::vector<typename Digraph::Edge> outcir;

  ///Vector containing the chord arcs.

  std::vector<typename Digraph::Edge> chords;

};

///Adds a Petersen digraph to the undirected \c G.

///Adds a Petersen digraph to the undirected \c G.

///\return The nodes and arcs of the generated digraph.

template<typename Digraph>

UPetStruct<Digraph> addUPetersen(Digraph &G,int num=5)

{

  UPetStruct<Digraph> n;

  for(int i=0;i<num;i++) {

    n.outer.push_back(G.addNode());

    n.inner.push_back(G.addNode());

  }

 for(int i=0;i<num;i++) {

   n.chords.push_back(G.addArc(n.outer[i],n.inner[i]));

   n.outcir.push_back(G.addArc(n.outer[i],n.outer[(i+1)%5]));

   n.incir.push_back(G.addArc(n.inner[i],n.inner[(i+2)%5]));

 }

 return n;

}

#endif