// -*- c++ -*-

#include <iostream>

#include <fstream>

#include <string>

#include <list_graph.h>

#include <hugo/smart_graph.h>

#include <hugo/dimacs.h>

#include <max_flow.h>

#include <hugo/time_measure.h>

#include <for_each_macros.h>

using namespace hugo;

// Use a DIMACS max flow file as stdin.

// read_dimacs_demo dimacs_max_flow_file

int main(int, char** argv) {

  std::string in=argv[1];

  typedef ListGraph MutableGraph;

  {

    typedef ListGraph Graph;

    typedef Graph::Node Node;

    typedef Graph::EdgeIt EdgeIt;

    Graph G;

    Node s, t;

    Graph::EdgeMap<int> cap(G);

    std::ifstream ins(in.c_str());

    readDimacsMaxFlow(ins, G, s, t, cap);

    Timer ts;

    Graph::EdgeMap<int> flow(G); //0 flow

    MaxFlow<Graph, int, Graph::EdgeMap<int>, Graph::EdgeMap<int> > 

      max_flow_test(G, s, t, cap, flow/*, true*/);

    std::cout << "ListGraph ..." << std::endl;

    {

      std::cout << "preflow ..." << std::endl;

      ts.reset();

      max_flow_test.run();

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

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

    }

    {

      std::cout << "physical blocking flow augmentation ..." << std::endl;

      FOR_EACH_LOC(Graph::EdgeIt, e, G) flow.set(e, 0);

      ts.reset();

      int i=0;

      while (max_flow_test.augmentOnBlockingFlow<MutableGraph>()) { ++i; }

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

      std::cout << "number of augmentation phases: " << i << std::endl; 

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

    }

//     {

//       std::cout << "faster physical blocking flow augmentation ..." << std::endl;

//       FOR_EACH_LOC(Graph::EdgeIt, e, G) flow.set(e, 0);

//       ts.reset();

//       int i=0;

//       while (max_flow_test.augmentOnBlockingFlow1<MutableGraph>()) { ++i; }

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

//       std::cout << "number of augmentation phases: " << i << std::endl; 

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

//     }

    {

      std::cout << "on-the-fly blocking flow augmentation ..." << std::endl;

      FOR_EACH_LOC(Graph::EdgeIt, e, G) flow.set(e, 0);

      ts.reset();

      int i=0;

      while (max_flow_test.augmentOnBlockingFlow2()) { ++i; }

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

      std::cout << "number of augmentation phases: " << i << std::endl; 

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

    }

    {

      std::cout << "on-the-fly shortest path augmentation ..." << std::endl;

      FOR_EACH_LOC(Graph::EdgeIt, e, G) flow.set(e, 0);

      ts.reset();

      int i=0;

      while (max_flow_test.augmentOnShortestPath()) { ++i; }

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

      std::cout << "number of augmentation phases: " << i << std::endl; 

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

    }

  }

  {

    typedef SmartGraph Graph;

    typedef Graph::Node Node;

    typedef Graph::EdgeIt EdgeIt;

    Graph G;

    Node s, t;

    Graph::EdgeMap<int> cap(G);

    std::ifstream ins(in.c_str());

    readDimacsMaxFlow(ins, G, s, t, cap);

    Timer ts;

    Graph::EdgeMap<int> flow(G); //0 flow

    MaxFlow<Graph, int, Graph::EdgeMap<int>, Graph::EdgeMap<int> > 

      max_flow_test(G, s, t, cap, flow/*, true*/);

    //    MaxFlow<Graph, int, Graph::EdgeMap<int>, Graph::EdgeMap<int> > 

    //  max_flow_test(G, s, t, cap, flow);

    std::cout << "SmatrGraph ..." << std::endl;

    {

      std::cout << "preflow ..." << std::endl;

      FOR_EACH_LOC(Graph::EdgeIt, e, G) flow.set(e, 0);

      ts.reset();

      max_flow_test.run();

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

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

    }

    {

      std::cout << "physical blocking flow augmentation ..." << std::endl;

      FOR_EACH_LOC(Graph::EdgeIt, e, G) flow.set(e, 0);

      ts.reset();

      int i=0;

      while (max_flow_test.augmentOnBlockingFlow<MutableGraph>()) { ++i; }

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

      std::cout << "number of augmentation phases: " << i << std::endl; 

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

    }

//     {

//       std::cout << "faster physical blocking flow augmentation ..." << std::endl;

//       FOR_EACH_LOC(Graph::EdgeIt, e, G) flow.set(e, 0);

//       ts.reset();

//       int i=0;

//       while (max_flow_test.augmentOnBlockingFlow1<MutableGraph>()) { ++i; }

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

//       std::cout << "number of augmentation phases: " << i << std::endl; 

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

//     }

    {

      std::cout << "on-the-fly blocking flow augmentation ..." << std::endl;

      FOR_EACH_LOC(Graph::EdgeIt, e, G) flow.set(e, 0);

      ts.reset();

      int i=0;

      while (max_flow_test.augmentOnBlockingFlow2()) { ++i; }

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

      std::cout << "number of augmentation phases: " << i << std::endl; 

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

    }

    {

      std::cout << "on-the-fly shortest path augmentation ..." << std::endl;

      FOR_EACH_LOC(Graph::EdgeIt, e, G) flow.set(e, 0);

      ts.reset();

      int i=0;

      while (max_flow_test.augmentOnShortestPath()) { ++i; }

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

      std::cout << "number of augmentation phases: " << i << std::endl; 

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

    }

  }

  return 0;

}