#include "metaformatsaction.h"
#include "metaformat.h"
#include "recptprototools.h"
#include "oaitools.h"

bool metaformatsaction::validateAction(recptproto *protocol, oaiargs &params)
{ 
  int params_size = params.getSize();

  // Remove any parameters that aren't valid for this action
  text_tmap::const_iterator param_iterator = params.begin();
  while (param_iterator != params.end())
  {
    if (param_iterator->first != "verb" &&
	param_iterator->first != "identifier")
    {
      params.erase(param_iterator->first);
    }

    param_iterator++;
  }

  int numArgs = 1; // the number of expected arguments
  
  // increase the number of expected arguments if the optional 'identifier' argument
  // is given 
  if (params["identifier"] != "") {
    ++numArgs;
  }

  // If the total number of params isn't equal to the number of valid
  // args (i.e. we have an arg but it isn't the identifier), throw an error  
  if((params_size != numArgs)){
    this->errorType = "badArgument";
    return false;
  }

  // Variables to hold identifier in Greenstone format
  text_t docID = params["identifier"]; 
  text_t collection = "";

  // The following two variables are used solely by the get_info() function call to test if
  // the identifier supplied is an actual document. If it isn't, we need to throw an exception.
  const text_tset metadata;

  // Check for the existence, etc. of the record if an identifier is given.
  if (docID != "") {
    oaiclassifier::toGSDL(collection, docID);
    
    // Only throw an error if we're using v2.0. 
    // v1.1 should simply return a response without a metadataFormat container. 1.1
    // should still set the errorType so we know that the error was encountered

    // the information retrieved here is retained for the output_content function below
    if (!get_info(docID, collection, "", metadata, false, protocol, this->gsdlResponse, cerr)){
      this->errorType = "idDoesNotExist";
      if(this->configuration->getOAIVersion() >= 200) {
	return false;
      }
    }
  }
  return true;
}

bool metaformatsaction::output_content(ostream &output, recptproto *protocol, oaiargs &params)
{
  // if an identifier parameter is being used, then respond to it - currently we reject anything other
  // than dublin core (unqualified)
  //
  // TODO: only return the selected identifier (if given) and don't validate the entry; just
  //       return nothing if an invalid or unknown metadata format is given
  
  // give the required xml response

  text_t gsdlId = params["identifier"];
  text_t gsdlCollect;

  // convert record identifier into GSDL format from OAI
  if (gsdlId != "") {
    oaiclassifier::toGSDL(gsdlCollect, gsdlId);
  }
  
  metaformat_map::iterator here = this->formats->begin();
  metaformat_map::iterator end  = this->formats->end();

  // v1.1 should check that the id - if supplied - didn't cause an error. If it did,
  // don't output the metadataFormat tags. OAI v2.0 should already have bailed.
  if(this->errorType != "idDoesNotExist"){
    while (here != end) { // Loop through the repository's supported metadata formats
      bool doOutput = true;
      
      // if we were given an identifier, then check if it supports the metadata format in question
      if (gsdlId != "") {
	doOutput = here->second.get_class()->is_available(gsdlCollect, this->gsdlResponse.docInfo[0]);
      }

      if (doOutput) {
	output << "  <metadataFormat>" << endl;
	here->second.get_class()->output_formatdata(output);
	output << "  </metadataFormat>\n";
      }
      ++here;
    }
  }

  return true;
}

void metaformatsaction::setConfiguration(oaiconfig *configuration)
{
  this->configuration = configuration;

  metaformat_map::iterator here = this->formats->begin();
  metaformat_map::iterator end  = this->formats->end();
  while (here != end) {    
    here->second.set_configuration((oaiconfig *) configuration);
    ++here;
  }
}