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

 *

 * 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.

 *

 */

#include <lemon/concepts/digraph.h>

#include <lemon/smart_graph.h>

#include <lemon/list_graph.h>

#include <lemon/lgf_reader.h>

#include <lemon/dfs.h>

#include <lemon/path.h>

#include "graph_test.h"

#include "test_tools.h"

using namespace lemon;

char test_lgf[] =

  "@nodes\n"

  "label\n"

  "0\n"

  "1\n"

  "2\n"

  "3\n"

  "4\n"

  "5\n"

  "6\n"

  "@arcs\n"

  "     label\n"

  "0 1  0\n"

  "1 2  1\n"

  "2 3  2\n"

  "1 4  3\n"

  "4 2  4\n"

  "4 5  5\n"

  "5 0  6\n"

  "6 3  7\n"

  "@attributes\n"

  "source 0\n"

  "target 5\n";

void checkDfsCompile()

{

  typedef concepts::Digraph Digraph;

  typedef Dfs<Digraph> DType;

  Digraph G;

  Digraph::Node n;

  Digraph::Arc e;

  int l;

  bool b;

  DType::DistMap d(G);

  DType::PredMap p(G);

  DType dfs_test(G);

  dfs_test.run(n);

  l  = dfs_test.dist(n);

  e  = dfs_test.predArc(n);

  n  = dfs_test.predNode(n);

  d  = dfs_test.distMap();

  p  = dfs_test.predMap();

  b  = dfs_test.reached(n);

  Path<Digraph> pp = dfs_test.path(n);

}

void checkDfsFunctionCompile()

{

  typedef int VType;

  typedef concepts::Digraph Digraph;

  typedef Digraph::Arc Arc;

  typedef Digraph::Node Node;

  Digraph g;

  bool b;

  dfs(g).run(Node());

  b=dfs(g).run(Node(),Node());

  dfs(g).run();

  dfs(g)

    .predMap(concepts::ReadWriteMap<Node,Arc>())

    .distMap(concepts::ReadWriteMap<Node,VType>())

    .reachedMap(concepts::ReadWriteMap<Node,bool>())

    .processedMap(concepts::WriteMap<Node,bool>())

    .run(Node());

  b=dfs(g)

    .predMap(concepts::ReadWriteMap<Node,Arc>())

    .distMap(concepts::ReadWriteMap<Node,VType>())

    .reachedMap(concepts::ReadWriteMap<Node,bool>())

    .processedMap(concepts::WriteMap<Node,bool>())

    .path(concepts::Path<Digraph>())

    .dist(VType())

    .run(Node(),Node());

  dfs(g)

    .predMap(concepts::ReadWriteMap<Node,Arc>())

    .distMap(concepts::ReadWriteMap<Node,VType>())

    .reachedMap(concepts::ReadWriteMap<Node,bool>())

    .processedMap(concepts::WriteMap<Node,bool>())

    .run();

}

template <class Digraph>

void checkDfs() {

  TEMPLATE_DIGRAPH_TYPEDEFS(Digraph);

  Digraph G;

  Node s, t;

  std::istringstream input(test_lgf);

  digraphReader(input, G).

    node("source", s).

    node("target", t).

    run();

  Dfs<Digraph> dfs_test(G);

  dfs_test.run(s);

  Path<Digraph> p = dfs_test.path(t);

  check(p.length() == dfs_test.dist(t),"path() found a wrong path.");

  check(checkPath(G, p),"path() found a wrong path.");

  check(pathSource(G, p) == s,"path() found a wrong path.");

  check(pathTarget(G, p) == t,"path() found a wrong path.");

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

    if (dfs_test.reached(v)) {

      check(v==s || dfs_test.predArc(v)!=INVALID, "Wrong tree.");

      if (dfs_test.predArc(v)!=INVALID ) {

        Arc e=dfs_test.predArc(v);

        Node u=G.source(e);

        check(u==dfs_test.predNode(v),"Wrong tree.");

        check(dfs_test.dist(v) - dfs_test.dist(u) == 1,

              "Wrong distance. (" << dfs_test.dist(u) << "->"

              << dfs_test.dist(v) << ")");

      }

    }

  }

  {

    NullMap<Node,Arc> myPredMap;

    dfs(G).predMap(myPredMap).run(s);

  }

}

int main()

{

  checkDfs<ListDigraph>();

  checkDfs<SmartDigraph>();

  return 0;

}