// -*- c++ -*-

 #include <iostream>

 #include <fstream>

 #include <vector>

 #include <cstdlib>

 #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 <bipartite_graph_wrapper.h>

 #include <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 UndirListGraph Graph; 

   typedef BipartiteGraph<ListGraph> 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; 

   std::cout << "Generatig a random bipartite graph..." << std::endl;

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

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

   random_init();

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

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

   }

   std::cout << "Edges of the bipartite graph:" << std::endl;

   FOR_EACH_LOC(EdgeIt, e, g) std::cout << e << " ";

   std::cout << std::endl;

   std::cout << "Nodes:" << std::endl;

   FOR_EACH_LOC(Graph::NodeIt, v, g) std::cout << v << " ";

   std::cout << std::endl;

   std::cout << "Nodes in T:" << std::endl;

   FOR_EACH_INC_LOC(Graph::ClassNodeIt, v, g, Graph::T_CLASS) std::cout << v << " ";

   std::cout << std::endl;

   std::cout << "Nodes in S:" << std::endl;

   FOR_EACH_INC_LOC(Graph::ClassNodeIt, v, g, Graph::S_CLASS) std::cout << v << " ";

   std::cout << std::endl;

   std::cout << "Erasing the first node..." << std::endl;

   NodeIt n;

   g.first(n);

   g.erase(n);

   std::cout << "Nodes of the bipartite graph:" << std::endl;

   FOR_EACH_GLOB(n, g) std::cout << n << " ";

   std::cout << std::endl;

   std::cout << "Nodes in T:" << std::endl;

   FOR_EACH_INC_LOC(Graph::ClassNodeIt, v, g, Graph::T_CLASS) std::cout << v << " ";

   std::cout << std::endl;

   std::cout << "Nodes in S:" << std::endl;

   FOR_EACH_INC_LOC(Graph::ClassNodeIt, v, g, Graph::S_CLASS) std::cout << v << " ";

   std::cout << std::endl;

   typedef stGraphWrapper<Graph> stGW;

   stGW stgw(g);

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

   Timer ts;

   ts.reset();

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

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

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

   max_flow_test.run();

 //  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 << "max flow value: " << max_flow_test.flowValue() << std::endl;

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

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

     if (flow[e]) std::cout << e << std::endl; 

   }

   std::cout << std::endl;

   return 0;

 }