#include <iostream>

#include <vector>

#include <string>

#include <list_graph.hh>

#include <preflow_push_hl.h>

#include <preflow_push_max_flow.h>

#include <reverse_bfs.h>

//#include <dijkstra.h>

using namespace hugo;

int main (int, char*[])

{

  typedef ListGraph::NodeIt NodeIt;

  typedef ListGraph::EdgeIt EdgeIt;

  typedef ListGraph::EachNodeIt EachNodeIt;

  typedef ListGraph::EachEdgeIt EachEdgeIt;

  typedef ListGraph::OutEdgeIt OutEdgeIt;

  typedef ListGraph::InEdgeIt InEdgeIt;

  ListGraph flow_test;

    //Ahuja könyv példája, maxflowvalue=13

  NodeIt s=flow_test.addNode();

  NodeIt v1=flow_test.addNode();

  NodeIt v2=flow_test.addNode();

  NodeIt v3=flow_test.addNode();

  NodeIt v4=flow_test.addNode();

  NodeIt v5=flow_test.addNode();

  NodeIt t=flow_test.addNode();

  ListGraph::NodeMap<std::string> Node_name(flow_test);

  Node_name.set(s, "s");

  Node_name.set(v1, "v1");

  Node_name.set(v2, "v2");

  Node_name.set(v3, "v3");

  Node_name.set(v4, "v4");

  Node_name.set(v5, "v5");

  Node_name.set(t, "t");

  EdgeIt s_v1=flow_test.addEdge(s, v1);

  EdgeIt s_v2=flow_test.addEdge(s, v2);

  EdgeIt s_v3=flow_test.addEdge(s, v3);

  EdgeIt v2_v4=flow_test.addEdge(v2, v4);

  EdgeIt v2_v5=flow_test.addEdge(v2, v5);

  EdgeIt v3_v5=flow_test.addEdge(v3, v5);

  EdgeIt v4_t=flow_test.addEdge(v4, t);

  EdgeIt v5_t=flow_test.addEdge(v5, t);

  EdgeIt v2_s=flow_test.addEdge(v2, s);

   ListGraph::EdgeMap<int> cap(flow_test);  

  cap.set(s_v1, 0);

  cap.set(s_v2, 10);

  cap.set(s_v3, 10);

  cap.set(v2_v4, 5);

  cap.set(v2_v5, 8);

  cap.set(v3_v5, 5);

  cap.set(v4_t, 8);

  cap.set(v5_t, 8);

  cap.set(v2_s, 0);

  //Marci példája, maxflowvalue=23

  /*  NodeIt s=flow_test.addNode();

  NodeIt v1=flow_test.addNode();

  NodeIt v2=flow_test.addNode();

  NodeIt v3=flow_test.addNode();

  NodeIt v4=flow_test.addNode();

  NodeIt t=flow_test.addNode();

  NodeIt w=flow_test.addNode();

  NodeMap<ListGraph, std::string> Node_name(flow_test);

  Node_name.set(s, "s");

  Node_name.set(v1, "v1");

  Node_name.set(v2, "v2");

  Node_name.set(v3, "v3");

  Node_name.set(v4, "v4");

  Node_name.set(t, "t");

  Node_name.set(w, "w");

  EdgeIt s_v1=flow_test.addEdge(s, v1);

  EdgeIt s_v2=flow_test.addEdge(s, v2);

  EdgeIt v1_v2=flow_test.addEdge(v1, v2);

  EdgeIt v2_v1=flow_test.addEdge(v2, v1);

  EdgeIt v1_v3=flow_test.addEdge(v1, v3);

  EdgeIt v3_v2=flow_test.addEdge(v3, v2);

  EdgeIt v2_v4=flow_test.addEdge(v2, v4);

  EdgeIt v4_v3=flow_test.addEdge(v4, v3);

  EdgeIt v3_t=flow_test.addEdge(v3, t);

  EdgeIt v4_t=flow_test.addEdge(v4, t);

  EdgeIt v3_v3=flow_test.addEdge(v3, v3);

  EdgeIt s_w=flow_test.addEdge(s, w);

  //  EdgeIt v2_s=flow_test.addEdge(v2, s);

  EdgeMap<ListGraph, int> cap(flow_test);  //serves as length in dijkstra

  cap.set(s_v1, 16);

  cap.set(s_v2, 13);

  cap.set(v1_v2, 10);

  cap.set(v2_v1, 4);

  cap.set(v1_v3, 12);

  cap.set(v3_v2, 9);

  cap.set(v2_v4, 14);

  cap.set(v4_v3, 7);

  cap.set(v3_t, 20);

  cap.set(v4_t, 4);

  cap.set(v3_v3, 4);

  cap.set(s_w, 4);

  //  cap.set(v2_s, 0);

*/

  //pelda 3, maxflowvalue=4

  /*      NodeIt s=flow_test.addNode();

  NodeIt v1=flow_test.addNode();

  NodeIt v2=flow_test.addNode();

  NodeIt t=flow_test.addNode();

  NodeIt w=flow_test.addNode();

  NodeMap<ListGraph, std::string> Node_name(flow_test);

  Node_name.set(s, "s");

  Node_name.set(v1, "v1");

  Node_name.set(v2, "v2");

  Node_name.set(t, "t");

  Node_name.set(w, "w");

  EdgeIt s_v1=flow_test.addEdge(s, v1);

  EdgeIt v1_v2=flow_test.addEdge(v1, v2);

  EdgeIt v2_t=flow_test.addEdge(v2, t);

  EdgeIt v1_v1=flow_test.addEdge(v1, v1);

  EdgeIt s_w=flow_test.addEdge(s, w);

  EdgeMap<ListGraph, int> cap(flow_test); 

  cap.set(s_v1, 16);

  cap.set(v1_v2, 10);

  cap.set(v2_t, 4);

  cap.set(v1_v1, 3);

  cap.set(s_w, 5);

  */

  /*

  std::cout << "Testing reverse_bfs..." << std::endl;

  reverse_bfs<ListGraph> bfs_test(flow_test, t);

  bfs_test.run();

  for (EachNodeIt w=flow_test.first_Node(); w.valid(); ++w) {

    std::cout <<"The distance of " << w << " is " << bfs_test.dist(w) <<std::endl;

    }

  */

  std::cout << "Testing preflow_push_hl..." << std::endl;

  preflow_push_hl<ListGraph, int> preflow_push_test(flow_test, s, t, cap);

  preflow_push_test.run();

  std::cout << "Maximum flow value is: " << preflow_push_test.maxflow() << "."<<std::endl;

  std::cout<< "The flow on Edge s-v1 is "<< preflow_push_test.flowonEdge(s_v1) << "."<<std::endl;

   ListGraph::EdgeMap<int> flow=preflow_push_test.allflow();  

  for (EachEdgeIt e=flow_test.template first<EachEdgeIt>(); e.valid(); ++e) {

    std::cout <<"Flow on Edge " << flow_test.tail(e) <<"-" << flow_test.head(e)<< " is " <<flow.get(e) <<std::endl;

    }

  std::cout << "A minimum cut: " <<std::endl;  

   ListGraph::NodeMap<bool> mincut=preflow_push_test.mincut();

  for (EachNodeIt v=flow_test.template first<EachNodeIt>(); v.valid(); ++v) {

      if (mincut.get(v)) std::cout <<Node_name.get(v)<< " ";

    }

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

  std::cout << "Testing preflow_push_max_flow..." << std::endl;

  preflow_push_max_flow<ListGraph, int> max_flow_test(flow_test, s, t, cap);

  max_flow_test.run();

  std::cout << "Maximum flow value is: " << max_flow_test.maxflow() << "."<< std::endl;

  std::cout << "A minimum cut: " <<std::endl;  

   ListGraph::NodeMap<bool> mincut2=max_flow_test.mincut();

  for (EachNodeIt v=flow_test.template first<EachNodeIt>(); v.valid(); ++v) {

    if (mincut2.get(v)) std::cout <<Node_name.get(v)<< " ";

  }

  std::cout << std::endl <<std::endl;

  /*

    std::cout << "Testing dijkstra..." << std::endl;

    NodeIt root=v2;

    dijkstra<ListGraph, int> dijkstra_test(flow_test, root, cap);

    dijkstra_test.run();

    for (EachNodeIt w=flow_test.first_Node(); w.valid(); ++w) {

      if (dijkstra_test.reach(w)) {

      std::cout <<"The distance of " << w << " is " << dijkstra_test.dist(w);

      if (dijkstra_test.pred(w).valid()) {

      std::cout <<", a shortest path from the root ends with Edge " << dijkstra_test.pred(w) <<std::endl; 

      } else {

       std::cout <<", this is the root."<<std::endl; }

      } else {

	cout << w << " is not reachable from " << root <<std::endl;

      }

    }

  */

  return 0;

}