// -*- c++ -*-

#include <iostream>

#include <fstream>

#include <vector>

#include <cstdlib>

#include <LEDA/graph.h>

#include <LEDA/mcb_matching.h>

#include <LEDA/list.h>

#include <LEDA/graph_gen.h>

#include <leda_graph_wrapper.h>

#include <list_graph.h>

//#include <smart_graph.h>

//#include <dimacs.h>

#include <time_measure.h>

#include <for_each_macros.h>

//#include <bfs_iterator.h>

#include <graph_wrapper.h>

#include <maps.h>

#include <edmonds_karp.h>

#include <preflow.h>

/**

 * Inicializalja a veletlenszamgeneratort.

 * Figyelem, ez nem jo igazi random szamokhoz,

 * erre ne bizzad a titkaidat!

 */

void random_init()

{

	unsigned int seed = getpid();

	seed |= seed << 15;

	seed ^= time(0);

	srand(seed);

}

/**

 * Egy veletlen int-et ad vissza 0 es m-1 kozott.

 */

int random(int m)

{

  return int( double(m) * rand() / (RAND_MAX + 1.0) );

}

using namespace hugo;

int main() {

  //for leda graph

  leda::graph lg;

  //lg.make_undirected();

  typedef LedaGraphWrapper<leda::graph> Graph;

  Graph g(lg);

  //for UndirListGraph

  //typedef UndirListGraph Graph; 

  //Graph g;

  typedef Graph::Node Node;

  typedef Graph::NodeIt NodeIt;

  typedef Graph::Edge Edge;

  typedef Graph::EdgeIt EdgeIt;

  typedef Graph::OutEdgeIt OutEdgeIt;

  std::vector<Graph::Node> s_nodes;

  std::vector<Graph::Node> t_nodes;

  int a;

  std::cout << "number of nodes in the first color class=";

  std::cin >> a; 

  int b;

  std::cout << "number of nodes in the second color class=";

  std::cin >> b; 

  int m;

  std::cout << "number of edges=";

  std::cin >> m; 

  int k;

  std::cout << "A bipartite graph is a random group graph if the color classes \nA and B are partitiones to A_0, A_1, ..., A_{k-1} and B_0, B_1, ..., B_{k-1} \nas equally as possible \nand the edges from A_i goes to A_{i-1 mod k} and A_{i+1 mod k}.\n";

  std::cout << "number of groups in LEDA random group graph=";

  std::cin >> k; 

  leda_list<leda_node> lS;

  leda_list<leda_node> lT;

  random_bigraph(lg, a, b, m, lS, lT, k);

//   for (int i=0; i<a; ++i) s_nodes.push_back(g.addNode());

//   for (int i=0; i<b; ++i) t_nodes.push_back(g.addNode());

//   random_init();

//   for(int i=0; i<m; ++i) {

//     g.addEdge(s_nodes[random(a)], t_nodes[random(b)]);

//   }

  Graph::NodeMap<int> ref_map(g, -1);

  IterableBoolMap< Graph::NodeMap<int> > bipartite_map(ref_map);

//   for (int i=0; i<a; ++i) bipartite_map.insert(s_nodes[i], false);

//   for (int i=0; i<b; ++i) bipartite_map.insert(t_nodes[i], true);

  leda_node ln;

  forall(ln, lS) bipartite_map.insert(ln, false);

  forall(ln, lT) bipartite_map.insert(ln, true);

  typedef BipartiteGraphWrapper<Graph> BGW;

  BGW bgw(g, bipartite_map);

  //  BGW::NodeMap<int> dbyj(bgw);

  //  BGW::EdgeMap<int> dbyxcj(bgw);

  typedef stGraphWrapper<BGW> stGW;

  stGW stgw(bgw);

  ConstMap<stGW::Edge, int> const1map(1);

  stGW::EdgeMap<int> flow(stgw);

  Timer ts;

  FOR_EACH_LOC(stGW::EdgeIt, e, stgw) flow.set(e, 0);

  ts.reset();

  //  stGW::EdgeMap<int> pre_flow(stgw);

  Preflow<stGW, int, ConstMap<stGW::Edge, int>, stGW::EdgeMap<int> > 

    pre_flow_test(stgw, stgw.S_NODE, stgw.T_NODE, const1map, flow/*, true*/);

  pre_flow_test.run();

  std::cout << "HUGO pre flow value: " << pre_flow_test.flowValue() << std::endl;

  std::cout << "elapsed time: " << ts << std::endl;

//   FOR_EACH_LOC(stGW::EdgeIt, e, stgw) { 

//     std::cout << e << ": " << pre_flow[e] << "\n"; 

//   }

  std::cout << "\n";

  ts.reset();  

  leda_list<leda_edge> ml=MAX_CARD_BIPARTITE_MATCHING(lg);

  //  stGW::EdgeMap<int> pre_flow(stgw);

  //Preflow<stGW, int, ConstMap<stGW::Edge, int>, stGW::EdgeMap<int> > 

  //  pre_flow_test(stgw, stgw.S_NODE, stgw.T_NODE, const1map, pre_flow, true);

  //pre_flow_test.run();

  std::cout << "LEDA matching value: " << ml.size() << std::endl;

  std::cout << "elapsed time: " << ts << std::endl;

//   FOR_EACH_LOC(stGW::EdgeIt, e, stgw) { 

//     std::cout << e << ": " << pre_flow[e] << "\n"; 

//   }

  std::cout << "\n";

  FOR_EACH_LOC(stGW::EdgeIt, e, stgw) flow.set(e, 0);

  ts.reset();

  MaxFlow<stGW, int, ConstMap<stGW::Edge, int>, stGW::EdgeMap<int> > 

    max_flow_test(stgw, stgw.S_NODE, stgw.T_NODE, const1map, flow);

//  while (max_flow_test.augmentOnShortestPath()) { }

  typedef ListGraph MutableGraph;

//  while (max_flow_test.augmentOnBlockingFlow1<MutableGraph>()) {

  while (max_flow_test.augmentOnBlockingFlow2()) {

   std::cout << max_flow_test.flowValue() << std::endl;

  }

  std::cout << "HUGO blocking flow value: " << max_flow_test.flowValue() << std::endl;

  std::cout << "elapsed time: " << ts << std::endl;

//   FOR_EACH_LOC(stGW::EdgeIt, e, stgw) { 

//     std::cout << e << ": " << max_flow[e] << "\n"; 

//   }

//   std::cout << "\n";

  return 0;

}