///////////////////////////////////////////////////////////////////////////
// ivr.js
//
// Plays a prompt and gets some input. Forwards on to the proper 
// destination or plays the error prompt if the selection is invalid.
//
// Note: This implies the existance of a larger surrounding system that
// among other things sets numberId. This code is released for example
// purposes only and is not intended to be a complete working system on
// its own.
//
// 2008-05-28 Anders Brownworth - anders-ivr-js at evantide.com
// this code: http://www.anders.com/1offs/ivr.js.txt
// db schema: http://www.anders.com/1offs/ivr.sql.txt
// 
///////////////////////////////////////////////////////////////////////////

var ivrPromptDir = "sounds/ivr";

///////////////////////////////////////////////////////////////////////////
// DB setup
///////////////////////////////////////////////////////////////////////////

use( "ODBC" );
var db = new ODBC( "freeswitch-db", "freeswitch-user", "freeswitch-password" );

///////////////////////////////////////////////////////////////////////////
// IVR Helper Functions
///////////////////////////////////////////////////////////////////////////

function ivrOnInput( session, type, data, arg ) {
  if ( type == "dtmf" ) {
    console_log( "info", "Got " + data.digit + "\n" );
    // should probably return true for all but VALID options instead...
    option = data.digit;
    return( false );

  }
  return( true );

}

function ivrGetDigit( soundFile, hangUpAfter ) {
  var loopCount = 0;

  while ( session.ready( ) && loopCount < hangUpAfter && option == "" ) {
    session.streamFile( ivrPromptDir + "/" + soundFile, ivrOnInput );
    if ( option == "" && session.ready( ) ) {
      session.collectInput( ivrOnInput, '', 5000 );

    }

  }
  return( option );

}

function ivrSetVars( destinationType, destinationData ) {
  if ( destinationType == "number" ) {
    numberId = getNumberId( destinationData );
    if ( numberId > -1 ) {
      tiedTo = "user";

    }
    to = destinationData;  // this is really horrible to be setting this all the way in here but JavaScript has no variable scoping!
    exit = true;

  }
  else if ( destinationType == "queueId" ) {
    queueId = destinationData;
    tiedTo = "queue";
    exit = true;

  }
  else if ( destinationType == "huntGroupId" ) {
    huntGroupId = destinationData;
    tiedTo = "huntgroup";
    exit = true;

  }
  else if ( destinationType == "ivrNodeId" ) {
    nodeId = destinationData;
    console_log( "info", "Continuing with ivr node id " + nodeId + "...\n" );

  }
  else {
    console_log( "err", "I don't understand " + destinationType + " as a destination type!\n" );
    exit = true;

  }

}

///////////////////////////////////////////////////////////////////////////
// Main Application
///////////////////////////////////////////////////////////////////////////

console_log( "info", "ivr.js Started...\n" );

if ( session.ready( ) ) {
  session.answer( );
  try {
    db.connect( );
    db.query( "select i.ivrnodeid, i.welcomefile " +
              "from ivrs i " +
              "  left join numbers n on i.numberid = n.numberid " +
              "where n.numberid = " + numberId );
    if ( db.nextRow( ) ) {
      row = db.getData( );
      nodeId = row[ "ivrnodeid" ];
      welcomeFile = row[ "welcomefile" ];

      session.answer( );
      if ( welcomeFile != "" ) {
        session.streamFile( ivrPromptDir + "/" + welcomeFile );

      }
      exit = false;
      while ( session.ready( ) && ! exit ) {
        db.query( "select promptfile, invalidselectionfile, hangupafter " +
                  "from ivrnodes " +
                  "where ivrnodeid = " + nodeId );
        if ( db.nextRow( ) ) {
          row = db.getData( );
          ivrPromptFile = row[ "promptfile" ];
          invalidSelectionFile = row[ "invalidselectionfile" ];
          hangUpAfter = row[ "hangupafter" ];

          console_log( "info", "ivrPromptFile=" + ivrPromptFile + " invalidSelectionFile=" + invalidSelectionFile + 
                       " hangUpAfter=" + hangUpAfter + "\n" );

          ivrGetDigit( ivrPromptFile, hangUpAfter );
          console_log( "info", "user selected option [" + option + "]\n" );

          if ( option != "" ) {
            db.query( "select destinationtype, destinationdata " +
                      "from ivroptions " +
                      "where ivrnodeid = " + nodeId + " and option='" + option + "'" );
            if ( db.nextRow( ) ) {
              console_log( "info", "option found!\n" );
              row = db.getData( );
              destinationType = row[ "destinationtype" ];
              destinationData = row[ "destinationdata" ];
              console_log( "info", "destination type: " + destinationType + " destination data: " + destinationData + "\n" );

              ivrSetVars( destinationType, destinationData );

            }
            else {
              console_log( "info", "option NOT found!\n" );
              session.streamFile( ivrPromptDir + "/" + invalidSelectionFile );

            }

          } // end if ( option != "" )
          option = "";

        }
        else {
          console_log( "err", "Whoops! No ivr with the id of " + ivrId + " in the database!\n" );
          exit = true;

        }

      } // end of while ( session.ready( ) && ! exit )

    } // end if ( db.nextRow( ) )
    else {
      console_log( "err", "Whoops! No ivr for numberId " + numberId + "\n" );

    }

  }
  catch( e ) {
    console_log( "err", "Whoops! " + e + "\n" );

  }

} // end if ( session.ready( ) );

console_log( "info", "ivr.js Finished.\n" );