/* -*- C++ -*-

  *

  * This file is a part of LEMON, a generic C++ optimization library

  *

  * Copyright (C) 2003-2007

  * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport

  * (Egervary Research Group on Combinatorial Optimization, EGRES).

  *

  * Permission to use, modify and distribute this software is granted

  * provided that this copyright notice appears in all copies. For

  * precise terms see the accompanying LICENSE file.

  *

  * This software is provided "AS IS" with no warranty of any kind,

  * express or implied, and with no claim as to its suitability for any

  * purpose.

  *

  */

 ///\ingroup demos

 ///\file

 ///\brief DIMACS to LGF converter.

 ///

 /// This program converts various DIMACS formats to the LEMON Graph Format

 /// (LGF).

 ///

 /// \include dim_to_lgf.cc

 #include <iostream>

 #include <fstream>

 #include <cstring>

 #include <lemon/smart_graph.h>

 #include <lemon/dimacs.h>

 #include <lemon/graph_writer.h>

 #include <lemon/arg_parser.h>

 using namespace std;

 using namespace lemon;

 int main(int argc, const char *argv[]) {

   typedef SmartGraph Graph;

   typedef Graph::Edge Edge;

   typedef Graph::Node Node;

   typedef Graph::EdgeIt EdgeIt;

   typedef Graph::NodeIt NodeIt;

   typedef Graph::EdgeMap<double> DoubleEdgeMap;

   typedef Graph::NodeMap<double> DoubleNodeMap;

   std::string inputName;

   std::string outputName;

   std::string typeName;

   bool mincostflow;

   bool maxflow;

   bool shortestpath;

   bool capacitated;

   bool plain;

   bool version;

   ArgParser ap(argc, argv);

   ap.refOption("-input", 

                "use FILE as input instead of standard input", 

                inputName).synonym("i", "-input")

     .refOption("-output", 

                "use FILE as output instead of standard output", 

                outputName).synonym("o", "-output")

     .refOption("-mincostflow", 

                "set the type of the graph to \"mincostflow\" graph", 

                mincostflow)

     .optionGroup("type", "-mincostflow").synonym("mcf", "-mincostflow")

     .refOption("-maxflow", 

                "set the type of the graph to \"maxflow\" graph", 

                maxflow)

     .optionGroup("type", "-maxflow").synonym("mf", "-maxflow")

     .refOption("-shortestpath", 

                "set the type of the graph to \"shortestpath\" graph", 

                shortestpath)

     .optionGroup("type", "-shortestpath").synonym("sp", "-shortestpath")

     .refOption("-capacitated", 

                "set the type of the graph to \"capacitated\" graph", 

                capacitated)

     .optionGroup("type", "-capacitated").synonym("cap", "-capacitated")

     .refOption("-plain", 

                "set the type of the graph to \"plain\" graph", 

                plain)

     .optionGroup("type", "-plain").synonym("pl", "-plain")

     .onlyOneGroup("type")

     .mandatoryGroup("type")

     .refOption("-version", "show version information", version)

     .synonym("v", "-version")

     .run();

   ifstream input;

   if (!inputName.empty()) {

     input.open(inputName.c_str());

     if (!input) {

       cerr << "File open error" << endl;

       return -1;

     }

   }

   istream& is = (inputName.empty() ? cin : input);

   ofstream output;

   if (!outputName.empty()) {

     output.open(outputName.c_str());

     if (!output) {

       cerr << "File open error" << endl;

       return -1;

     }

   }

   ostream& os = (outputName.empty() ? cout : output);

   if (mincostflow) {

     Graph graph;

     DoubleEdgeMap lower(graph), capacity(graph), cost(graph);

     DoubleNodeMap supply(graph);

     readDimacs(is, graph, lower, capacity, cost, supply);

     GraphWriter<Graph>(os, graph).

       writeNodeMap("supply", supply).

       writeEdgeMap("lower", lower).

       writeEdgeMap("capacity", capacity).

       writeEdgeMap("cost", cost).

       run();

   } else if (maxflow) {

     Graph graph;

     Node s, t;

     DoubleEdgeMap capacity(graph);

     readDimacs(is, graph, capacity, s, t);

     GraphWriter<Graph>(os, graph).

       writeEdgeMap("capacity", capacity).

       writeNode("source", s).

       writeNode("target", t).

       run();

   } else if (shortestpath) {

     Graph graph;

     Node s;

     DoubleEdgeMap capacity(graph);

     readDimacs(is, graph, capacity, s);

     GraphWriter<Graph>(os, graph).

       writeEdgeMap("capacity", capacity).

       writeNode("source", s).

       run();

   } else if (capacitated) {

     Graph graph;

     DoubleEdgeMap capacity(graph);

     readDimacs(is, graph, capacity);

     GraphWriter<Graph>(os, graph).

       writeEdgeMap("capacity", capacity).

       run();

   } else if (plain) {

     Graph graph;

     readDimacs(is, graph);

     GraphWriter<Graph>(os, graph).run();

   } else {

     cerr << "Invalid type error" << endl;

     return -1;

   }

   return 0;

 }