/* -*- 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 <sstream>

#include <lemon/smart_graph.h>

#include <lemon/adaptors.h>

#include <lemon/concepts/digraph.h>

#include <lemon/concepts/maps.h>

#include <lemon/lgf_reader.h>

#include <lemon/hao_orlin.h>

#include "test_tools.h"

using namespace lemon;

using namespace std;

const std::string lgf =

  "@nodes\n"

  "label\n"

  "0\n"

  "1\n"

  "2\n"

  "3\n"

  "4\n"

  "5\n"

  "@edges\n"

  "     cap1 cap2 cap3\n"

  "0 1  1    1    1   \n"

  "0 2  2    2    4   \n"

  "1 2  4    4    4   \n"

  "3 4  1    1    1   \n"

  "3 5  2    2    4   \n"

  "4 5  4    4    4   \n"

  "5 4  4    4    4   \n"

  "2 3  1    6    6   \n"

  "4 0  1    6    6   \n";

void checkHaoOrlinCompile()

{

  typedef int Value;

  typedef concepts::Digraph Digraph;

  typedef Digraph::Node Node;

  typedef Digraph::Arc Arc;

  typedef concepts::ReadMap<Arc, Value> CapMap;

  typedef concepts::WriteMap<Node, bool> CutMap;

  Digraph g;

  Node n;

  CapMap cap;

  CutMap cut;

  Value v;

  ignore_unused_variable_warning(v);

  HaoOrlin<Digraph, CapMap> ho_test(g, cap);

  const HaoOrlin<Digraph, CapMap>&

    const_ho_test = ho_test;

  ho_test.init();

  ho_test.init(n);

  ho_test.calculateOut();

  ho_test.calculateIn();

  ho_test.run();

  ho_test.run(n);

  v = const_ho_test.minCutValue();

  v = const_ho_test.minCutMap(cut);

}

template <typename Graph, typename CapMap, typename CutMap>

typename CapMap::Value 

  cutValue(const Graph& graph, const CapMap& cap, const CutMap& cut)

{

  typename CapMap::Value sum = 0;

  for (typename Graph::ArcIt a(graph); a != INVALID; ++a) {

    if (cut[graph.source(a)] && !cut[graph.target(a)])

      sum += cap[a];

  }

  return sum;

}

int main() {

  SmartDigraph graph;

  SmartDigraph::ArcMap<int> cap1(graph), cap2(graph), cap3(graph);

  SmartDigraph::NodeMap<bool> cut(graph);

  istringstream input(lgf);

  digraphReader(graph, input)

    .arcMap("cap1", cap1)

    .arcMap("cap2", cap2)

    .arcMap("cap3", cap3)

    .run();

  {

    HaoOrlin<SmartDigraph> ho(graph, cap1);

    ho.run();

    ho.minCutMap(cut);

    check(ho.minCutValue() == 1, "Wrong cut value");

    check(ho.minCutValue() == cutValue(graph, cap1, cut), "Wrong cut value");

  }

  {

    HaoOrlin<SmartDigraph> ho(graph, cap2);

    ho.run();

    ho.minCutMap(cut);

    check(ho.minCutValue() == 1, "Wrong cut value");

    check(ho.minCutValue() == cutValue(graph, cap2, cut), "Wrong cut value");

  }

  {

    HaoOrlin<SmartDigraph> ho(graph, cap3);

    ho.run();

    ho.minCutMap(cut);

    check(ho.minCutValue() == 1, "Wrong cut value");

    check(ho.minCutValue() == cutValue(graph, cap3, cut), "Wrong cut value");

  }

  typedef Undirector<SmartDigraph> UGraph;

  UGraph ugraph(graph);

  {

    HaoOrlin<UGraph, SmartDigraph::ArcMap<int> > ho(ugraph, cap1);

    ho.run();

    ho.minCutMap(cut);

    check(ho.minCutValue() == 2, "Wrong cut value");

    check(ho.minCutValue() == cutValue(ugraph, cap1, cut), "Wrong cut value");

  }

  {

    HaoOrlin<UGraph, SmartDigraph::ArcMap<int> > ho(ugraph, cap2);

    ho.run();

    ho.minCutMap(cut);

    check(ho.minCutValue() == 5, "Wrong cut value");

    check(ho.minCutValue() == cutValue(ugraph, cap2, cut), "Wrong cut value");

  }

  {

    HaoOrlin<UGraph, SmartDigraph::ArcMap<int> > ho(ugraph, cap3);

    ho.run();

    ho.minCutMap(cut);

    check(ho.minCutValue() == 5, "Wrong cut value");

    check(ho.minCutValue() == cutValue(ugraph, cap3, cut), "Wrong cut value");

  }

  return 0;

}