// -*- c++ -*-

#include <iostream>

#include <fstream>

#include <vector>

#include <cstdlib>

#include <sage_graph.h>

//#include <smart_graph.h>

//#include <dimacs.h>

#include <hugo/time_measure.h>

#include <hugo/for_each_macros.h>

#include <bfs_dfs.h>

#include <hugo/graph_wrapper.h>

#include <bipartite_graph_wrapper.h>

#include <hugo/maps.h>

#include <max_flow.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() {

  typedef UndirSageGraph Graph; 

  typedef Graph::Node Node;

  typedef Graph::NodeIt NodeIt;

  typedef Graph::Edge Edge;

  typedef Graph::EdgeIt EdgeIt;

  typedef Graph::OutEdgeIt OutEdgeIt;

  Graph g;

  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; 

  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);

//   Graph::Node u;

//   std::cout << "These nodes will be in S:\n";

//   //FIXME azert kellene ++, es invalid vizsgalat u-bol, hogy ezt le lehessen 

//   //irni 1etlen FOR_EACH-csel.

//   for (bipartite_map.first(u, false); g.valid(u); bipartite_map.next(u)) 

//     std::cout << u << " ";

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

//   std::cout << "These nodes will be in T:\n";

//   for (bipartite_map.first(u, true); g.valid(u); bipartite_map.next(u)) 

//     std::cout << u << " ";

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

  typedef BipartiteGraphWrapper<Graph> BGW;

  BGW bgw(g, bipartite_map);

//   std::cout << "Nodes by NodeIt:\n";

//   FOR_EACH_LOC(BGW::NodeIt, n, bgw) {

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

//   }

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

//   std::cout << "Nodes in S by ClassNodeIt:\n";

//   FOR_EACH_INC_LOC(BGW::ClassNodeIt, n, bgw, bgw.S_CLASS) {

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

//   }

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

//   std::cout << "Nodes in T by ClassNodeIt:\n";

//   FOR_EACH_INC_LOC(BGW::ClassNodeIt, n, bgw, bgw.T_CLASS) {

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

//   }

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

//   std::cout << "Edges of the bipartite graph:\n";

//   FOR_EACH_LOC(BGW::EdgeIt, e, bgw) {

//     std::cout << bgw.tail(e) << "->" << bgw.head(e) << std::endl;

//   }

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

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

  typedef stGraphWrapper<BGW> stGW;

  stGW stgw(bgw);

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

//  stGW::NodeMap<int> ize(stgw);

//   BfsIterator< BGW, BGW::NodeMap<bool> > bfs(bgw);

//   Graph::NodeIt si;

//   Graph::Node s; 

//   s=g.first(si);

//   bfs.pushAndSetReached(BGW::Node(s));

//   while (!bfs.finished()) { ++bfs; }

//   FOR_EACH_LOC(stGW::NodeIt, n, stgw) { 

//     std::cout << "out-edges of " << n << ":\n"; 

//     FOR_EACH_INC_LOC(stGW::OutEdgeIt, e, stgw, n) { 

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

//       std::cout << " aNode: " << stgw.aNode(e) << "\n";

//       std::cout << " bNode: " << stgw.bNode(e) << "\n";      

//     }

//     std::cout << "in-edges of " << n << ":\n"; 

//     FOR_EACH_INC_LOC(stGW::InEdgeIt, e, stgw, n) { 

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

//       std::cout << " aNode: " << stgw.aNode(e) << "\n";

//       std::cout << " bNode: " << stgw.bNode(e) << "\n";     

//     }

//   }

//   std::cout << "Edges of the stGraphWrapper:\n"; 

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

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

//   }

//   stGW::NodeMap<bool> b(stgw);

//   FOR_EACH_LOC(stGW::NodeIt, n, stgw) { 

//     std::cout << n << ": " << b[n] <<"\n";

//   }

//   std::cout << "Bfs from s: \n";

//   BfsIterator< stGW, stGW::NodeMap<bool> > bfs_stgw(stgw);

//   bfs_stgw.pushAndSetReached(stgw.S_NODE);

//   while (!bfs_stgw.finished()) { 

//     std::cout << " " << stGW::OutEdgeIt(bfs_stgw) << "\n";

//     ++bfs_stgw; 

//   }

  Timer ts;

  ts.reset();

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

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

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

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

  typedef SageGraph MutableGraph;

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

  while (max_flow_test.augmentOnBlockingFlow2()) {

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

  }

  std::cout << "max 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";

  ts.reset();

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

  MaxFlow<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 << "pre 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 << ": " << pre_flow[e] << "\n"; 

//   }

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

  return 0;

}