/* -*- mode: C++; indent-tabs-mode: nil; -*-

 *

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

 *

 * Copyright (C) 2003-2009

 * 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.

 *

 */

#include <lemon/concepts/digraph.h>

#include <lemon/list_graph.h>

#include <lemon/smart_graph.h>

#include <lemon/full_graph.h>

#include "test_tools.h"

#include "graph_test.h"

using namespace lemon;

using namespace lemon::concepts;

template <class Digraph>

void checkDigraphBuild() {

  TEMPLATE_DIGRAPH_TYPEDEFS(Digraph);

  Digraph G;

  checkGraphNodeList(G, 0);

  checkGraphArcList(G, 0);

  Node

    n1 = G.addNode(),

    n2 = G.addNode(),

    n3 = G.addNode();

  checkGraphNodeList(G, 3);

  checkGraphArcList(G, 0);

  Arc a1 = G.addArc(n1, n2);

  check(G.source(a1) == n1 && G.target(a1) == n2, "Wrong arc");

  checkGraphNodeList(G, 3);

  checkGraphArcList(G, 1);

  checkGraphOutArcList(G, n1, 1);

  checkGraphOutArcList(G, n2, 0);

  checkGraphOutArcList(G, n3, 0);

  checkGraphInArcList(G, n1, 0);

  checkGraphInArcList(G, n2, 1);

  checkGraphInArcList(G, n3, 0);

  checkGraphConArcList(G, 1);

  Arc a2 = G.addArc(n2, n1),

      a3 = G.addArc(n2, n3),

      a4 = G.addArc(n2, n3);

  ::lemon::ignore_unused_variable_warning(a2,a3,a4);

  checkGraphNodeList(G, 3);

  checkGraphArcList(G, 4);

  checkGraphOutArcList(G, n1, 1);

  checkGraphOutArcList(G, n2, 3);

  checkGraphOutArcList(G, n3, 0);

  checkGraphInArcList(G, n1, 1);

  checkGraphInArcList(G, n2, 1);

  checkGraphInArcList(G, n3, 2);

  checkGraphConArcList(G, 4);

  checkNodeIds(G);

  checkArcIds(G);

  checkGraphNodeMap(G);

  checkGraphArcMap(G);

}

template <class Digraph>

void checkDigraphSplit() {

  TEMPLATE_DIGRAPH_TYPEDEFS(Digraph);

  Digraph G;

  Node n1 = G.addNode(), n2 = G.addNode(), n3 = G.addNode();

  Arc a1 = G.addArc(n1, n2), a2 = G.addArc(n2, n1),

      a3 = G.addArc(n2, n3), a4 = G.addArc(n2, n3);

  ::lemon::ignore_unused_variable_warning(a1,a2,a3,a4);

  Node n4 = G.split(n2);

  check(G.target(OutArcIt(G, n2)) == n4 &&

        G.source(InArcIt(G, n4)) == n2,

        "Wrong split.");

  checkGraphNodeList(G, 4);

  checkGraphArcList(G, 5);

  checkGraphOutArcList(G, n1, 1);

  checkGraphOutArcList(G, n2, 1);

  checkGraphOutArcList(G, n3, 0);

  checkGraphOutArcList(G, n4, 3);

  checkGraphInArcList(G, n1, 1);

  checkGraphInArcList(G, n2, 1);

  checkGraphInArcList(G, n3, 2);

  checkGraphInArcList(G, n4, 1);

  checkGraphConArcList(G, 5);

}

template <class Digraph>

void checkDigraphAlter() {

  TEMPLATE_DIGRAPH_TYPEDEFS(Digraph);

  Digraph G;

  Node n1 = G.addNode(), n2 = G.addNode(),

       n3 = G.addNode(), n4 = G.addNode();

  Arc a1 = G.addArc(n1, n2), a2 = G.addArc(n4, n1),

      a3 = G.addArc(n4, n3), a4 = G.addArc(n4, n3),

      a5 = G.addArc(n2, n4);

  ::lemon::ignore_unused_variable_warning(a1,a2,a3,a5);

  checkGraphNodeList(G, 4);

  checkGraphArcList(G, 5);

  // Check changeSource() and changeTarget()

  G.changeTarget(a4, n1);

  checkGraphNodeList(G, 4);

  checkGraphArcList(G, 5);

  checkGraphOutArcList(G, n1, 1);

  checkGraphOutArcList(G, n2, 1);

  checkGraphOutArcList(G, n3, 0);

  checkGraphOutArcList(G, n4, 3);

  checkGraphInArcList(G, n1, 2);

  checkGraphInArcList(G, n2, 1);

  checkGraphInArcList(G, n3, 1);

  checkGraphInArcList(G, n4, 1);

  checkGraphConArcList(G, 5);

  G.changeSource(a4, n3);

  checkGraphNodeList(G, 4);

  checkGraphArcList(G, 5);

  checkGraphOutArcList(G, n1, 1);

  checkGraphOutArcList(G, n2, 1);

  checkGraphOutArcList(G, n3, 1);

  checkGraphOutArcList(G, n4, 2);

  checkGraphInArcList(G, n1, 2);

  checkGraphInArcList(G, n2, 1);

  checkGraphInArcList(G, n3, 1);

  checkGraphInArcList(G, n4, 1);

  checkGraphConArcList(G, 5);

  // Check contract()

  G.contract(n2, n4, false);

  checkGraphNodeList(G, 3);

  checkGraphArcList(G, 5);

  checkGraphOutArcList(G, n1, 1);

  checkGraphOutArcList(G, n2, 3);

  checkGraphOutArcList(G, n3, 1);

  checkGraphInArcList(G, n1, 2);

  checkGraphInArcList(G, n2, 2);

  checkGraphInArcList(G, n3, 1);

  checkGraphConArcList(G, 5);

  G.contract(n2, n1);

  checkGraphNodeList(G, 2);

  checkGraphArcList(G, 3);

  checkGraphOutArcList(G, n2, 2);

  checkGraphOutArcList(G, n3, 1);

  checkGraphInArcList(G, n2, 2);

  checkGraphInArcList(G, n3, 1);

  checkGraphConArcList(G, 3);

}

template <class Digraph>

void checkDigraphErase() {

  TEMPLATE_DIGRAPH_TYPEDEFS(Digraph);

  Digraph G;

  Node n1 = G.addNode(), n2 = G.addNode(),

       n3 = G.addNode(), n4 = G.addNode();

  Arc a1 = G.addArc(n1, n2), a2 = G.addArc(n4, n1),

      a3 = G.addArc(n4, n3), a4 = G.addArc(n3, n1),

      a5 = G.addArc(n2, n4);

  ::lemon::ignore_unused_variable_warning(a2,a3,a4,a5);

  // Check arc deletion

  G.erase(a1);

  checkGraphNodeList(G, 4);

  checkGraphArcList(G, 4);

  checkGraphOutArcList(G, n1, 0);

  checkGraphOutArcList(G, n2, 1);

  checkGraphOutArcList(G, n3, 1);

  checkGraphOutArcList(G, n4, 2);

  checkGraphInArcList(G, n1, 2);

  checkGraphInArcList(G, n2, 0);

  checkGraphInArcList(G, n3, 1);

  checkGraphInArcList(G, n4, 1);

  checkGraphConArcList(G, 4);

  // Check node deletion

  G.erase(n4);

  checkGraphNodeList(G, 3);

  checkGraphArcList(G, 1);

  checkGraphOutArcList(G, n1, 0);

  checkGraphOutArcList(G, n2, 0);

  checkGraphOutArcList(G, n3, 1);

  checkGraphOutArcList(G, n4, 0);

  checkGraphInArcList(G, n1, 1);

  checkGraphInArcList(G, n2, 0);

  checkGraphInArcList(G, n3, 0);

  checkGraphInArcList(G, n4, 0);

  checkGraphConArcList(G, 1);

}

template <class Digraph>

void checkDigraphSnapshot() {

  TEMPLATE_DIGRAPH_TYPEDEFS(Digraph);

  Digraph G;

  Node n1 = G.addNode(), n2 = G.addNode(), n3 = G.addNode();

  Arc a1 = G.addArc(n1, n2), a2 = G.addArc(n2, n1),

      a3 = G.addArc(n2, n3), a4 = G.addArc(n2, n3);

  ::lemon::ignore_unused_variable_warning(a1,a2,a3,a4);

  typename Digraph::Snapshot snapshot(G);

  Node n = G.addNode();

  G.addArc(n3, n);

  G.addArc(n, n3);

  checkGraphNodeList(G, 4);

  checkGraphArcList(G, 6);

  snapshot.restore();

  checkGraphNodeList(G, 3);

  checkGraphArcList(G, 4);

  checkGraphOutArcList(G, n1, 1);

  checkGraphOutArcList(G, n2, 3);

  checkGraphOutArcList(G, n3, 0);

  checkGraphInArcList(G, n1, 1);

  checkGraphInArcList(G, n2, 1);

  checkGraphInArcList(G, n3, 2);

  checkGraphConArcList(G, 4);

  checkNodeIds(G);

  checkArcIds(G);

  checkGraphNodeMap(G);

  checkGraphArcMap(G);

  G.addNode();

  snapshot.save(G);

  G.addArc(G.addNode(), G.addNode());

  snapshot.restore();

  checkGraphNodeList(G, 4);

  checkGraphArcList(G, 4);

}

void checkConcepts() {

  { // Checking digraph components

    checkConcept<BaseDigraphComponent, BaseDigraphComponent >();

    checkConcept<IDableDigraphComponent<>,

      IDableDigraphComponent<> >();

    checkConcept<IterableDigraphComponent<>,

      IterableDigraphComponent<> >();

    checkConcept<MappableDigraphComponent<>,

      MappableDigraphComponent<> >();

  }

  { // Checking skeleton digraph

    checkConcept<Digraph, Digraph>();

  }

  { // Checking ListDigraph

    checkConcept<Digraph, ListDigraph>();

    checkConcept<AlterableDigraphComponent<>, ListDigraph>();

    checkConcept<ExtendableDigraphComponent<>, ListDigraph>();

    checkConcept<ClearableDigraphComponent<>, ListDigraph>();

    checkConcept<ErasableDigraphComponent<>, ListDigraph>();

  }

  { // Checking SmartDigraph

    checkConcept<Digraph, SmartDigraph>();

    checkConcept<AlterableDigraphComponent<>, SmartDigraph>();

    checkConcept<ExtendableDigraphComponent<>, SmartDigraph>();

    checkConcept<ClearableDigraphComponent<>, SmartDigraph>();

  }

  { // Checking FullDigraph

    checkConcept<Digraph, FullDigraph>();

  }

}

template <typename Digraph>

void checkDigraphValidity() {

  TEMPLATE_DIGRAPH_TYPEDEFS(Digraph);

  Digraph g;

  Node

    n1 = g.addNode(),

    n2 = g.addNode(),

    n3 = g.addNode();

  Arc

    e1 = g.addArc(n1, n2),

    e2 = g.addArc(n2, n3);

  ::lemon::ignore_unused_variable_warning(e2);

  check(g.valid(n1), "Wrong validity check");

  check(g.valid(e1), "Wrong validity check");

  check(!g.valid(g.nodeFromId(-1)), "Wrong validity check");

  check(!g.valid(g.arcFromId(-1)), "Wrong validity check");

}

template <typename Digraph>

void checkDigraphValidityErase() {

  TEMPLATE_DIGRAPH_TYPEDEFS(Digraph);

  Digraph g;

  Node

    n1 = g.addNode(),

    n2 = g.addNode(),

    n3 = g.addNode();

  Arc

    e1 = g.addArc(n1, n2),

    e2 = g.addArc(n2, n3);

  check(g.valid(n1), "Wrong validity check");

  check(g.valid(e1), "Wrong validity check");

  g.erase(n1);

  check(!g.valid(n1), "Wrong validity check");

  check(g.valid(n2), "Wrong validity check");

  check(g.valid(n3), "Wrong validity check");

  check(!g.valid(e1), "Wrong validity check");

  check(g.valid(e2), "Wrong validity check");

  check(!g.valid(g.nodeFromId(-1)), "Wrong validity check");

  check(!g.valid(g.arcFromId(-1)), "Wrong validity check");

}

void checkFullDigraph(int num) {

  typedef FullDigraph Digraph;

  DIGRAPH_TYPEDEFS(Digraph);

  Digraph G(num);

  checkGraphNodeList(G, num);

  checkGraphArcList(G, num * num);

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

    checkGraphOutArcList(G, n, num);

    checkGraphInArcList(G, n, num);

  }

  checkGraphConArcList(G, num * num);

  checkNodeIds(G);

  checkArcIds(G);

  checkGraphNodeMap(G);

  checkGraphArcMap(G);

  for (int i = 0; i < G.nodeNum(); ++i) {

    check(G.index(G(i)) == i, "Wrong index");

  }

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

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

      Arc a = G.arc(s, t);

      check(G.source(a) == s && G.target(a) == t, "Wrong arc lookup");

    }

  }

}

void checkDigraphs() {

  { // Checking ListDigraph

    checkDigraphBuild<ListDigraph>();

    checkDigraphSplit<ListDigraph>();

    checkDigraphAlter<ListDigraph>();

    checkDigraphErase<ListDigraph>();

    checkDigraphSnapshot<ListDigraph>();

    checkDigraphValidityErase<ListDigraph>();

  }

  { // Checking SmartDigraph

    checkDigraphBuild<SmartDigraph>();

    checkDigraphSplit<SmartDigraph>();

    checkDigraphSnapshot<SmartDigraph>();

    checkDigraphValidity<SmartDigraph>();

  }

  { // Checking FullDigraph

    checkFullDigraph(8);

  }

}

int main() {

  checkDigraphs();

  checkConcepts();

  return 0;

}