/* -*- C++ -*-

  *

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

  *

  * Copyright (C) 2003-2007

  * 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_GRAPH_TEST_H

 #define LEMON_TEST_GRAPH_TEST_H

 //#include <lemon/graph_utils.h>

 #include "test_tools.h"

 //! \ingroup misc

 //! \file

 //! \brief Some utility and test cases to test digraph classes.

 namespace lemon {

   ///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 edges of the inner circle.

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

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

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

     ///Vector containing the chord edges.

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

   };

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

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

   ///\return The nodes and edges of the generated graph.

   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 edges.

   ///

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

   ///

   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 graph.

   ///

   ///  Checks the bidirectioned Petersen graph.

   ///

   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);

     }  

   }

   template<class Digraph> void checkDigraphNodeList(Digraph &G, int nn)

   {

     typename Digraph::NodeIt n(G);

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

       check(n!=INVALID,"Wrong Node list linking.");

       ++n;

     }

     check(n==INVALID,"Wrong Node list linking.");

   }

   template<class Digraph>

   void checkDigraphArcList(Digraph &G, int nn)

   {

     typedef typename Digraph::ArcIt ArcIt;

     ArcIt e(G);

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

       check(e!=INVALID,"Wrong Arc list linking.");

       ++e;

     }

     check(e==INVALID,"Wrong Arc list linking.");

   }

   template<class Digraph> 

   void checkDigraphOutArcList(Digraph &G, typename Digraph::Node n, int nn)

   {

     typename Digraph::OutArcIt e(G,n);

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

       check(e!=INVALID,"Wrong OutArc list linking.");

       check(n==G.source(e), "Wrong OutArc list linking.");

       ++e;

     }

     check(e==INVALID,"Wrong OutArc list linking.");

   }

   template<class Digraph> void 

   checkDigraphInArcList(Digraph &G, typename Digraph::Node n, int nn)

   {

     typename Digraph::InArcIt e(G,n);

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

       check(e!=INVALID,"Wrong InArc list linking.");

       check(n==G.target(e), "Wrong InArc list linking.");

       ++e;

     }

     check(e==INVALID,"Wrong InArc list linking.");

   }

   template <class Digraph> 

   void checkDigraph() {

     const int num = 5;

     Digraph G;

     addPetersen(G, num);

     bidirDigraph(G);

     checkBidirPetersen(G, num);

   }

   template <class Digraph> 

   void checkDigraphIterators(const Digraph& digraph) {

     typedef typename Digraph::Node Node;

     typedef typename Digraph::NodeIt NodeIt;

     typedef typename Digraph::Arc Arc;

     typedef typename Digraph::ArcIt ArcIt;

     typedef typename Digraph::InArcIt InArcIt;

     typedef typename Digraph::OutArcIt OutArcIt;

     //    typedef ConArcIt<Digraph> ConArcIt;

   }

   ///\file

   ///\todo Check target(), source() as well;

 } //namespace lemon

 #endif