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

  *

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

  *

  * Copyright (C) 2003-2010

  * 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/graph.h>

 #include <lemon/concepts/maps.h>

 #include <lemon/lgf_reader.h>

 #include <lemon/nagamochi_ibaraki.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"

   "2 3  1    6    6   \n";

 void checkNagamochiIbarakiCompile()

 {

   typedef int Value;

   typedef concepts::Graph Graph;

   typedef Graph::Node Node;

   typedef Graph::Edge Edge;

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

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

   Graph g;

   Node n;

   CapMap cap;

   CutMap cut;

   Value v;

   bool b;

   ::lemon::ignore_unused_variable_warning(v,b);

   NagamochiIbaraki<Graph, CapMap> ni_test(g, cap);

   const NagamochiIbaraki<Graph, CapMap>& const_ni_test = ni_test;

   ni_test.init();

   ni_test.start();

   b = ni_test.processNextPhase();

   ni_test.run();

   v = const_ni_test.minCutValue();

   v = const_ni_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::EdgeIt e(graph); e != INVALID; ++e) {

     if (cut[graph.u(e)] != cut[graph.v(e)]) {

       sum += cap[e];

     }

   }

   return sum;

 }

 int main() {

   SmartGraph graph;

   SmartGraph::EdgeMap<int> cap1(graph), cap2(graph), cap3(graph);

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

   istringstream input(lgf);

   graphReader(graph, input)

     .edgeMap("cap1", cap1)

     .edgeMap("cap2", cap2)

     .edgeMap("cap3", cap3)

     .run();

   {

     NagamochiIbaraki<SmartGraph> ni(graph, cap1);

     ni.run();

     ni.minCutMap(cut);

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

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

   }

   {

     NagamochiIbaraki<SmartGraph> ni(graph, cap2);

     ni.run();

     ni.minCutMap(cut);

     check(ni.minCutValue() == 3, "Wrong cut value");

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

   }

   {

     NagamochiIbaraki<SmartGraph> ni(graph, cap3);

     ni.run();

     ni.minCutMap(cut);

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

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

   }

   {

     NagamochiIbaraki<SmartGraph>::SetUnitCapacity::Create ni(graph);

     ni.run();

     ni.minCutMap(cut);

     ConstMap<SmartGraph::Edge, int> cap4(1);

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

     check(ni.minCutValue() == cutValue(graph, cap4, cut), "Wrong cut value");

   }

   return 0;

 }