#include <iostream>

#include <vector>

#include <string>

#include <list_graph.hh>

#include <bfs_iterator.hh>

#include <edmonds_karp.hh>

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;

  typedef ListGraph::SymEdgeIt SymEdgeIt;

  ListGraph G;

  std::vector<NodeIt> vector_of_NodeIts;

  for(int i=0; i!=8; ++i) vector_of_NodeIts.push_back(G.addNode());

  for(int i=0; i!=8; ++i)

    for(int j=0; j!=8; ++j) 

      if ((i<j)&&(i+j)%3) G.addEdge(vector_of_NodeIts[i], vector_of_NodeIts[j]);

  std::cout << "We construct a directed graph on the node set {0,1,2,...,7}," <<std::endl << "i-->j is arc iff i<j and (i+j)%3." << std::endl;

  std::cout << "number of nodes: " << count(G.first<EachNodeIt>()) << std::endl;

  for(EachNodeIt i=G.first<EachNodeIt>(); i.valid(); ++i) {

    std::cout << "node " << G.id(i) << std::endl;

    std::cout << " outdegree (OutEdgeIt): " << count(G.first<OutEdgeIt>(i)) << " "; 

    for(OutEdgeIt j=G.first<OutEdgeIt>(i); j.valid(); ++j) { 

      std::cout << "(" << G.id(G.tail(j)) << "--" << G.id(j) << "->" << G.id(G.head(j)) << ") ";

    }

    std::cout << std::endl; 

    std::cout<< " ";

    for(OutEdgeIt j=G.first<OutEdgeIt>(i); j.valid(); ++j) { 

      std::cout << G.aNode(j) << "->" << G.bNode(j) << " "; } 

    std::cout<<std::endl;

    std::cout << " indegree: (InEdgeIt) " << count(G.first<InEdgeIt>(i)) << " ";

    for(InEdgeIt j=G.first<InEdgeIt>(i); j.valid(); ++j) { 

      std::cout << j << " "; } 

    std::cout << std::endl;

    std::cout<< " ";

    for(InEdgeIt j=G.first<InEdgeIt>(i); j.valid(); ++j) { 

      std::cout << G.aNode(j) << "->" << G.bNode(j) << " "; } 

    std::cout<<std::endl;

    std::cout << " degree: (SymEdgeIt) " << count(G.first<SymEdgeIt>(i)) << " ";

    for(SymEdgeIt j=G.first<SymEdgeIt>(i); j.valid(); ++j) { 

      std::cout << j << " "; } 

    std::cout<<std::endl;

    std::cout<< " ";

    for(SymEdgeIt j=G.first<SymEdgeIt>(i); j.valid(); ++j) { 

      std::cout << G.aNode(j) << "->" << G.bNode(j) << " "; } 

    std::cout<<std::endl;

  }

  std::cout << "all edges: ";

  for(EachEdgeIt i=G.first<EachEdgeIt>(); i.valid(); ++i) {

    std::cout << i << " ";

  }

  std::cout << std::endl;

  std::cout << "node property array test" << std::endl;

  ListGraph::NodeMap<int> my_property_vector(G);

  EachNodeIt v;

  G.getFirst(v);

  my_property_vector.set(v, 42);

  my_property_vector.set(++G.first<EachNodeIt>(), 314);

  my_property_vector.set(++++G.first<EachNodeIt>(), 1956);

  my_property_vector.set(vector_of_NodeIts[3], 1989);

  my_property_vector.set(vector_of_NodeIts[4], 2003);

  my_property_vector.set(vector_of_NodeIts[7], 1978);

  std::cout << "some node property values..." << std::endl;

  for(EachNodeIt i=G.first<EachNodeIt>(); i.valid(); ++i) {

    std::cout << my_property_vector.get(i) << std::endl;

  }

  int _i=1;

  int _ii=1;

  ListGraph::EdgeMap<int> my_edge_property(G);

  for(EachEdgeIt i=G.first<EachEdgeIt>(); i.valid(); ++i) {

    my_edge_property.set(i, _i);

    _i*=_ii; ++_ii;

  }

  std::cout << "node and edge property values on the tails and heads of edges..." << std::endl;

  for(EachEdgeIt j=G.first<EachEdgeIt>(); j.valid(); ++j) {

    std::cout << my_property_vector.get(G.tail(j)) << "--" << my_edge_property.get(j) << "-->" << my_property_vector.get(G.head(j)) << " ";

  }

  std::cout << std::endl;

/*

  std::cout << "bfs from the first node" << std::endl;

  bfs<ListGraph> bfs_test(G, G.first<EachNodeIt>());

  bfs_test.run();

  std::cout << "reached: ";

  for(EachNodeIt i=G.first<EachNodeIt>(); i.valid(); ++i) {

    std::cout << bfs_test.reached.get(i) << " ";

  }

  std::cout<<std::endl;

  std::cout << "dist: ";

  for(EachNodeIt i=G.first<EachNodeIt>(); i.valid(); ++i) {

    std::cout << bfs_test.dist.get(i) << " ";

  }

  std::cout<<std::endl;

*/

  std::cout << "augmenting path flow algorithm test..." << std::endl;

  ListGraph flowG;

  NodeIt s=flowG.addNode();

  NodeIt v1=flowG.addNode();

  NodeIt v2=flowG.addNode();

  NodeIt v3=flowG.addNode();

  NodeIt v4=flowG.addNode();

  NodeIt t=flowG.addNode();

  ListGraph::NodeMap<std::string> node_name(flowG);

  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");

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

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

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

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

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

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

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

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

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

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

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

  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);

  std::cout << "on directed graph graph" << std::endl; //<< flowG;

  std::cout << "names and capacity values" << std::endl; 

  for(EachNodeIt i=flowG.first<EachNodeIt>(); i.valid(); ++i) { 

    std::cout << node_name.get(i) << ": ";

    std::cout << "out edges: ";

    for(OutEdgeIt j=flowG.first<OutEdgeIt>(i); j.valid(); ++j) 

      std::cout << node_name.get(flowG.tail(j)) << "-"<< cap.get(j) << "->" << node_name.get(flowG.head(j)) << " ";

    std::cout << "in edges: ";

    for(InEdgeIt j=flowG.first<InEdgeIt>(i); j.valid(); ++j) 

      std::cout << node_name.get(flowG.tail(j)) << "-"<< cap.get(j) << "->" << node_name.get(flowG.head(j)) << " ";

    std::cout << std::endl;

  }

  //flowG.deleteEdge(s_v1);

  //flowG.deleteEdge(s_v2);

  //flowG.deleteEdge(v1_v2);

  //flowG.deleteEdge(v1_v3);

  //flowG.setTail(v3_t, v2);

  //flowG.setHead(v3_t, s);

/*

  for(EachNodeIt i=flowG.first<EachNodeIt>(); i.valid(); ++i) { 

    std::cout << node_name.get(i) << ": ";

    std::cout << "out edges: ";

    for(OutEdgeIt j=flowG.first<OutEdgeIt>(i); j.valid(); ++j) 

      std::cout << node_name.get(flowG.tail(j)) << "-"<< cap.get(j) << "->" << node_name.get(flowG.head(j)) << " ";

    std::cout << "in edges: ";

    for(InEdgeIt j=flowG.first<InEdgeIt>(i); j.valid(); ++j) 

      std::cout << node_name.get(flowG.tail(j)) << "-"<< cap.get(j) << "->" << node_name.get(flowG.head(j)) << " ";

    std::cout << std::endl;

  }

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

    std::cout << node_name.get(flowG.tail(e)) << "-"<< cap.get(e) << "->" << node_name.get(flowG.head(e)) << " ";

  }

*/

  /*

  while (flowG.first<EachEdgeIt>().valid()) {

    flowG.deleteEdge(flowG.first<EachEdgeIt>());

    for(EachNodeIt i=flowG.first<EachNodeIt>(); i.valid(); ++i) { 

      std::cout << node_name.get(i) << ": ";

      std::cout << "out edges: ";

      for(OutEdgeIt j=flowG.first<OutEdgeIt>(i); j.valid(); ++j) 

	std::cout << node_name.get(flowG.tail(j)) << "-"<< cap.get(j) << "->" << node_name.get(flowG.head(j)) << " ";

      std::cout << "in edges: ";

      for(InEdgeIt j=flowG.first<InEdgeIt>(i); j.valid(); ++j) 

	std::cout << node_name.get(flowG.tail(j)) << "-"<< cap.get(j) << "->" << node_name.get(flowG.head(j)) << " ";

      std::cout << std::endl;

    }

  }

  while (flowG.first<EachNodeIt>().valid()) {

    flowG.deleteNode(flowG.first<EachNodeIt>());

    for(EachNodeIt i=flowG.first<EachNodeIt>(); i.valid(); ++i) { 

      std::cout << node_name.get(i) << ": ";

      std::cout << "out edges: ";

      for(OutEdgeIt j=flowG.first<OutEdgeIt>(i); j.valid(); ++j) 

	std::cout << node_name.get(flowG.tail(j)) << "-"<< cap.get(j) << "->" << node_name.get(flowG.head(j)) << " ";

      std::cout << "in edges: ";

      for(InEdgeIt j=flowG.first<InEdgeIt>(i); j.valid(); ++j) 

	std::cout << node_name.get(flowG.tail(j)) << "-"<< cap.get(j) << "->" << node_name.get(flowG.head(j)) << " ";

      std::cout << std::endl;

    }

  }

  */

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

  {

    ListGraph::EdgeMap<int> flow(flowG, 0);

    MaxFlow<ListGraph, int, ListGraph::EdgeMap<int>, ListGraph::EdgeMap<int> > max_flow_test(flowG, s, t, flow, cap);

    max_flow_test.run();

    std::cout << "maximum flow: "<< std::endl;

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

      std::cout<<"("<<flowG.tail(e)<< "-"<<flow.get(e)<<"->"<<flowG.head(e)<<") ";

    }

    std::cout<<std::endl;

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

  }

  {

    std::list<NodeIt> S;

    S.push_back(s); S.push_back(v3);

    std::list<NodeIt> T;

    T.push_back(t);

    ListGraph::EdgeMap<int> flow(flowG, 0);

    MaxFlow2<ListGraph, int, ListGraph::EdgeMap<int>, ListGraph::EdgeMap<int> > max_flow_test(flowG, S, T, flow, cap);

    max_flow_test.run();

    std::cout << "maximum flow: "<< std::endl;

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

      std::cout<<"("<<flowG.tail(e)<< "-"<<flow.get(e)<<"->"<<flowG.head(e)<<") ";

    }

    std::cout<<std::endl;

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

  }

  return 0;

}