#include "positioning.hh"
#include "realposition.hh"
#include "fbcm.hh"
#include "frbhmbasic.hh"
#include "interlinknetworks.hh"
#include "radar.hh"
#include "configuration.hh"
#include "posexcept.hh"
#include "stock.hh"

using namespace std ;



/* *** Constructors *** */


Positioning::Positioning()
{
  initialise_algorithms() ;
  loop() ;
}


Positioning::~Positioning()
{
  for (vector<PositioningAlgorithm*>::const_iterator i =
         algorithms.begin() ; i != algorithms.end() ; ++i)
    delete *i ;
  algorithms.clear() ;
}



/* *** Operations *** */


void Positioning::initialise_algorithms()
{
  if (! Configuration::is_configured("positioning.algorithm"))
    throw missing_configuration(
      "No positioning algorithm specified in configuration!") ;

  const vector<string> &algo_names =
    Configuration::string_vector_value("positioning.algorithm") ;

  for (vector<string>::const_iterator i = algo_names.begin() ;
       i != algo_names.end() ; ++i)
    {
      if (*i == "Real")
        algorithms.push_back(new RealPosition) ;

      else if (*i == "FBCM")
        {
          Stock::update_all_friis_indexes() ;
          algorithms.push_back(new FBCM) ;
        }

      else if (*i == "FRBHMBasic")
        //TODO: Pre-compute all per-ReferencePoint friis indexes?
        algorithms.push_back(new FRBHMBasic) ;

      else if (*i == "InterlinkNetworks")
        algorithms.push_back(new InterlinkNetworks) ;

      else if (*i == "RADAR")
        algorithms.push_back(new RADAR) ;

      else
        throw bad_configuration(
          "The specified positioning_algorithm « "+ *i +
          " » is unknown!") ;
    }
}


void Positioning::loop()
{
  vector<PositioningAlgorithm*>::const_iterator algo ;

  while (! input.eof())
    {
      const Request &request = input.get_next_request() ;
      if (! request)
        continue ;

      for (algo = algorithms.begin() ; algo != algorithms.end() ;
           ++algo)
        {
          Result res = (*algo)->compute(request) ;
          output.write(res) ;
        }
    }
}