/***************************************************************************
 *
 * Project:  OpenCPN
 * Purpose:  NMEA0183 Support Classes
 * Author:   Samuel R. Blackburn, David S. Register
 *
 ***************************************************************************
 *   Copyright (C) 2010 by Samuel R. Blackburn, David S Register           *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,  USA.             *
 ***************************************************************************
 *
 *   S Blackburn's original source license:                                *
 *         "You can use it any way you like."                              *
 *   More recent (2010) license statement:                                 *
 *         "It is BSD license, do with it what you will"                   *
 */

#include "nmea0183.h"
#include <wx/listimpl.cpp>

PLUGIN_BEGIN_NAMESPACE

/*
** Author: Samuel R. Blackburn
** CI$: 76300,326
** Internet: sammy@sed.csc.com
**
** You can use it any way you like.
*/

WX_DEFINE_LIST(MRL);

NMEA0183::NMEA0183() {
  initialize();

  response_table.Append((RESPONSE *)&Hdm);
  response_table.Append((RESPONSE *)&Hdg);
  response_table.Append((RESPONSE *)&Hdt);

  sort_response_table();
  set_container_pointers();
}

NMEA0183::~NMEA0183() { initialize(); }

void NMEA0183::initialize(void) {
  //   ASSERT_VALID( this );

  ErrorMessage.Empty();
}

void NMEA0183::set_container_pointers(void) {
  //   ASSERT_VALID( this );

  int index = 0;
  int number_of_entries_in_table = response_table.GetCount();

  RESPONSE *this_response = (RESPONSE *)NULL;

  index = 0;

  while (index < number_of_entries_in_table) {
    this_response = (RESPONSE *)response_table[index];

    this_response->SetContainer(this);

    index++;
  }
}

void NMEA0183::sort_response_table(void) {
  //   ASSERT_VALID( this );

  /*
     int index = 0;
     int number_of_entries_in_table = response_table.GetSize();

     RESPONSE *this_response = (RESPONSE *) NULL;
     RESPONSE *that_response = (RESPONSE *) NULL;

     bool sorted = FALSE;

     while( sorted == FALSE )
     {
        sorted = TRUE;

        index = 0;

        while( index < number_of_entries_in_table )
        {
           this_response = (RESPONSE *) response_table.Item( index     );
           that_response = (RESPONSE *) response_table.Item( index + 1 );

           if ( this_response->Mnemonic.Compare( that_response->Mnemonic ) > 0 )
           {
              response_table[ index     ] = that_response;
              response_table[ index + 1 ] = this_response;

              sorted = FALSE;
           }

           index++;
        }
     }
  */
}

/*
** Public Interface
*/

bool NMEA0183::IsGood(void) const {
  //   ASSERT_VALID( this );

  /*
  ** NMEA 0183 sentences begin with $ and and with CR LF
  */

  if (sentence.Sentence[0] != '$') {
    return (FALSE);
  }

  /*
  ** Next to last character must be a CR
  */

  /*  This seems too harsh for cross platform work

  Relax requirement to line ending of either CR or LF

  if ( sentence.Sentence.Mid( sentence.Sentence.Len() - 2, 1 ) != wxString(_T("\r")) )
  {
     return( FALSE );
  }

  if ( sentence.Sentence.Right( 1 ) != _T("\n") )
  {
     return( FALSE );
  }
  */

  // TODO: GPSD messages are not terminated with CR/LF   if ( (sentence.Sentence.Right( 1 ) != _T("\n") ) &&
  // (sentence.Sentence.Right( 1 ) != _T("\r") ))
  //      return false;

  return (TRUE);
}

bool NMEA0183::PreParse(void) {
  if (IsGood()) {
    wxString mnemonic = sentence.Field(0);

    /*
     ** See if this is a proprietary field
     */

    if (mnemonic.Left(1) == 'P')
      mnemonic = _T("P");

    else
      mnemonic = mnemonic.Right(3);

    LastSentenceIDReceived = mnemonic;

    return true;
  } else
    return false;
}

bool NMEA0183::Parse(void) {
  bool return_value = FALSE;

  if (PreParse()) {
    wxString mnemonic = sentence.Field(0);

    /*
    ** See if this is a proprietary field
    */

    if (mnemonic.Left(1) == 'P') {
      mnemonic = _T("P");
    } else {
      mnemonic = mnemonic.Right(3);
    }

    /*
    ** Set up our default error message
    */

    ErrorMessage = mnemonic;
    ErrorMessage += _T(" is an unknown type of sentence");

    LastSentenceIDReceived = mnemonic;

    RESPONSE *response_p = (RESPONSE *)NULL;

    //          Traverse the response list to find a mnemonic match

    wxMRLNode *node = response_table.GetFirst();

    int comparison = 0;

    while (node) {
      RESPONSE *resp = node->GetData();

      comparison = mnemonic.Cmp(resp->Mnemonic);

      if (comparison == 0) {
        response_p = (RESPONSE *)resp;
        return_value = response_p->Parse(sentence);

        /*
        ** Set your ErrorMessage
        */

        if (return_value == TRUE) {
          ErrorMessage = _T("No Error");
          LastSentenceIDParsed = response_p->Mnemonic;
          TalkerID = talker_id(sentence);
          ExpandedTalkerID = expand_talker_id(TalkerID);
        } else {
          ErrorMessage = response_p->ErrorMessage;
        }

        break;
      }

      node = node->GetNext();
    }

  } else {
    return_value = FALSE;
  }

  return (return_value);
}

wxArrayString NMEA0183::GetRecognizedArray(void) {
  wxArrayString ret;

  wxMRLNode *node = response_table.GetFirst();

  while (node) {
    RESPONSE *resp = node->GetData();
    ret.Add(resp->Mnemonic);
    node = node->GetNext();
  }

  return ret;
}

NMEA0183 &NMEA0183::operator<<(wxString &source) {
  //   ASSERT_VALID( this );

  sentence = source;

  return (*this);
}

NMEA0183 &NMEA0183::operator>>(wxString &destination) {
  //   ASSERT_VALID( this );

  destination = sentence;

  return (*this);
}

PLUGIN_END_NAMESPACE
