function validateForm( form ) {
  var errors = new Array();
  if ( selfIntersecting ) {
    errors[errors.length] = selfIntersectingString;
  }
  if ( form.elements['newZone[Type]'].value != 'Inactive' && form.elements['newZone[Type]'].value != 'Privacy' ) {
    if ( !form.newAlarmRgbR.value || !form.newAlarmRgbG.value || !form.newAlarmRgbB.value ) {
      errors[errors.length] = alarmRGBUnsetString;
    }
    form.elements['newZone[AlarmRGB]'].value = (form.newAlarmRgbR.value<<16)|(form.newAlarmRgbG.value<<8)|form.newAlarmRgbB.value;
    if ( !form.elements['newZone[MinPixelThreshold]'].value || (parseInt(form.elements['newZone[MinPixelThreshold]'].value) <= 0 ) ) {
      errors[errors.length] = minPixelThresUnsetString;
    } else if ( (parseInt(form.elements['newZone[MinPixelThreshold]'].value) >= parseInt(form.elements['newZone[MaxPixelThreshold]'].value)) && (parseInt(form.elements['newZone[MaxPixelThreshold]'].value) > 0) ) {
      errors[errors.length] = minPixelThresLtMaxString;
    }
    if ( form.elements['newZone[CheckMethod]'].value == 'FilteredPixels' || form.elements['newZone[CheckMethod]'].value == 'Blobs' ) {
      if ( !form.elements['newZone[FilterX]'].value || !form.elements['newZone[FilterY]'].value ) {
        errors[errors.length] = filterUnsetString;
      }
    }
    if ( !form.elements['newZone[MinAlarmPixels]'].value || (parseFloat(form.elements['newZone[MinAlarmPixels]'].value) <= 0 ) ) {
      errors[errors.length] = minAlarmAreaUnsetString;
    } else if ( (parseFloat(form.elements['newZone[MinAlarmPixels]'].value) >= parseFloat(form.elements['newZone[MaxAlarmPixels]'].value)) && (parseFloat(form.elements['newZone[MaxAlarmPixels]'].value) > 0) ) {
      errors[errors.length] = minAlarmAreaLtMaxString;
    }
    if ( form.elements['newZone[CheckMethod]'].value == 'FilteredPixels' || form.elements['newZone[CheckMethod]'].value == 'Blobs' ) {
      if ( !form.elements['newZone[MinFilterPixels]'].value || (parseFloat(form.elements['newZone[MinFilterPixels]'].value) <= 0 ) ) {
        errors[errors.length] = minFilterAreaUnsetString;
      } else if ( (parseFloat(form.elements['newZone[MinFilterPixels]'].value) >= parseFloat(form.elements['newZone[MaxFilterPixels]'].value)) && (parseFloat(form.elements['newZone[MaxFilterPixels]'].value) > 0) ) {
        errors[errors.length] = minFilterAreaLtMaxString;
      } else if ( parseFloat(form.elements['newZone[MinAlarmPixels]'].value) < parseFloat(form.elements['newZone[MinFilterPixels]'].value) ) {
        errors[errors.length] = minFilterLtMinAlarmString;
      }
      if ( form.elements['newZone[CheckMethod]'].value == 'Blobs' ) {
        if ( !form.elements['newZone[MinBlobPixels]'].value || (parseFloat(form.elements['newZone[MinBlobPixels]'].value) <= 0 ) ) {
          errors[errors.length] = minBlobAreaUnsetString;
        } else if ( (parseFloat(form.elements['newZone[MinBlobPixels]'].value) >= parseFloat(form.elements['newZone[MaxBlobPixels]'].value)) && (parseFloat(form.elements['newZone[MaxBlobPixels]'].value) > 0) ) {
          errors[errors.length] = minBlobAreaLtMaxString;
        } else if ( parseFloat(form.elements['newZone[MinFilterPixels]'].value) < parseFloat(form.elements['newZone[MinBlobPixels]'].value) ) {
          errors[errors.length] = minBlobLtMinFilterString;
        }
        if ( !form.elements['newZone[MinBlobs]'].value || (parseInt(form.elements['newZone[MinBlobs]'].value) <= 0 ) ) {
          errors[errors.length] = minBlobsUnsetString;
        } else if ( (parseInt(form.elements['newZone[MinBlobs]'].value) >= parseInt(form.elements['newZone[MaxBlobs]'].value)) && (parseInt(form.elements['newZone[MaxBlobs]'].value) > 0) ) {
          errors[errors.length] = minBlobsLtMaxString;
        }
      }
    }
  }
  if ( errors.length ) {
    alert( errors.join( "\n" ) );
    return false;
  }
  return true;
}

function submitForm( form ) {
  form.elements['newZone[AlarmRGB]'].value = (form.newAlarmRgbR.value<<16)|(form.newAlarmRgbG.value<<8)|form.newAlarmRgbB.value;
  form.elements['newZone[NumCoords]'].value = zone['Points'].length;
  form.elements['newZone[Coords]'].value = getCoordString();
  form.elements['newZone[Area]'].value = zone.Area;

  form.submit();
}

function applyZoneType() {
  var form = document.zoneForm;
  if ( form.elements['newZone[Type]'].value == 'Inactive' || form.elements['newZone[Type]'].value == 'Privacy' ) {
    form.presetSelector.disabled = true;
    form.newAlarmRgbR.disabled = true;
    form.newAlarmRgbG.disabled = true;
    form.newAlarmRgbB.disabled = true;
    form.elements['newZone[CheckMethod]'].disabled = true;
    form.elements['newZone[MinPixelThreshold]'].disabled = true;
    form.elements['newZone[MaxPixelThreshold]'].disabled = true;
    form.elements['newZone[MinAlarmPixels]'].disabled = true;
    form.elements['newZone[MaxAlarmPixels]'].disabled = true;
    form.elements['newZone[FilterX]'].disabled = true;
    form.elements['newZone[FilterY]'].disabled = true;
    form.elements['newZone[MinFilterPixels]'].disabled = true;
    form.elements['newZone[MaxFilterPixels]'].disabled = true;
    form.elements['newZone[MinBlobPixels]'].disabled = true;
    form.elements['newZone[MaxBlobPixels]'].disabled = true;
    form.elements['newZone[MinBlobs]'].disabled = true;
    form.elements['newZone[MaxBlobs]'].disabled = true;
    form.elements['newZone[OverloadFrames]'].disabled = true;
    form.elements['newZone[ExtendAlarmFrames]'].disabled = true;
  } else if ( form.elements['newZone[Type]'].value == 'Preclusive' ) {
    form.presetSelector.disabled = false;
    form.newAlarmRgbR.disabled = true;
    form.newAlarmRgbG.disabled = true;
    form.newAlarmRgbB.disabled = true;
    form.elements['newZone[CheckMethod]'].disabled = false;
    form.elements['newZone[MinPixelThreshold]'].disabled = false;
    form.elements['newZone[MaxPixelThreshold]'].disabled = false;
    form.elements['newZone[MinAlarmPixels]'].disabled = false;
    form.elements['newZone[MaxAlarmPixels]'].disabled = false;
    form.elements['newZone[OverloadFrames]'].disabled = false;
    form.elements['newZone[ExtendAlarmFrames]'].disabled = false;
    applyCheckMethod();
  } else {
    form.presetSelector.disabled = false;
    form.newAlarmRgbR.disabled = false;
    form.newAlarmRgbG.disabled = false;
    form.newAlarmRgbB.disabled = false;
    form.elements['newZone[CheckMethod]'].disabled = false;
    form.elements['newZone[MinPixelThreshold]'].disabled = false;
    form.elements['newZone[MaxPixelThreshold]'].disabled = false;
    form.elements['newZone[MinAlarmPixels]'].disabled = false;
    form.elements['newZone[MaxAlarmPixels]'].disabled = false;
    form.elements['newZone[OverloadFrames]'].disabled = false;
    form.elements['newZone[ExtendAlarmFrames]'].disabled = true;
    applyCheckMethod();
  }
}

function applyCheckMethod() {
  var form = document.zoneForm;
  if ( form.elements['newZone[CheckMethod]'].value == 'AlarmedPixels' ) {
    form.elements['newZone[FilterX]'].disabled = true;
    form.elements['newZone[FilterY]'].disabled = true;
    form.elements['newZone[MinFilterPixels]'].disabled = true;
    form.elements['newZone[MaxFilterPixels]'].disabled = true;
    form.elements['newZone[MinBlobPixels]'].disabled = true;
    form.elements['newZone[MaxBlobPixels]'].disabled = true;
    form.elements['newZone[MinBlobs]'].disabled = true;
    form.elements['newZone[MaxBlobs]'].disabled = true;
  } else if ( form.elements['newZone[CheckMethod]'].value == 'FilteredPixels' ) {
    form.elements['newZone[FilterX]'].disabled = false;
    form.elements['newZone[FilterY]'].disabled = false;
    form.elements['newZone[MinFilterPixels]'].disabled = false;
    form.elements['newZone[MaxFilterPixels]'].disabled = false;
    form.elements['newZone[MinBlobPixels]'].disabled = true;
    form.elements['newZone[MaxBlobPixels]'].disabled = true;
    form.elements['newZone[MinBlobs]'].disabled = true;
    form.elements['newZone[MaxBlobs]'].disabled = true;
  } else {
    form.elements['newZone[FilterX]'].disabled = false;
    form.elements['newZone[FilterY]'].disabled = false;
    form.elements['newZone[MinFilterPixels]'].disabled = false;
    form.elements['newZone[MaxFilterPixels]'].disabled = false;
    form.elements['newZone[MinBlobPixels]'].disabled = false;
    form.elements['newZone[MaxBlobPixels]'].disabled = false;
    form.elements['newZone[MinBlobs]'].disabled = false;
    form.elements['newZone[MaxBlobs]'].disabled = false;
  }
}

function applyPreset() {
  var form = document.zoneForm;
  var presetId = $('presetSelector').get('value');

  if ( presets[presetId] ) {
    var preset = presets[presetId];

    form.elements['newZone[Units]'].selectedIndex = preset['UnitsIndex'];
    form.elements['newZone[CheckMethod]'].selectedIndex = preset['CheckMethodIndex'];
    form.elements['newZone[MinPixelThreshold]'].value = preset['MinPixelThreshold'];
    form.elements['newZone[MaxPixelThreshold]'].value = preset['MaxPixelThreshold'];
    form.elements['newZone[FilterX]'].value = preset['FilterX'];
    form.elements['newZone[FilterY]'].value = preset['FilterY'];
    form.elements['newZone[MinAlarmPixels]'].value = preset['MinAlarmPixels'];
    form.elements['newZone[MaxAlarmPixels]'].value = preset['MaxAlarmPixels'];
    form.elements['newZone[MinFilterPixels]'].value = preset['MinFilterPixels'];
    form.elements['newZone[MaxFilterPixels]'].value = preset['MaxFilterPixels'];
    form.elements['newZone[MinBlobPixels]'].value = preset['MinBlobPixels'];
    form.elements['newZone[MaxBlobPixels]'].value = preset['MaxBlobPixels'];
    form.elements['newZone[MinBlobs]'].value = preset['MinBlobs'];
    form.elements['newZone[MaxBlobs]'].value = preset['MaxBlobs'];
    form.elements['newZone[OverloadFrames]'].value = preset['OverloadFrames'];
    form.elements['newZone[ExtendAlarmFrames]'].value = preset['ExtendAlarmFrames'];

    applyCheckMethod();
    form.elements['newZone[TempArea]'].value = 100;
  }
}

function toPixels( field, maxValue ) {
  if ( field.value != '' )
    field.value = Math.round((field.value*maxValue)/100);
}

function toPercent( field, maxValue ) {
  if ( field.value != '' )
    field.value = Math.round((100*100*field.value)/maxValue)/100;
}

function applyZoneUnits() {
  var area = zone.Area;

  var form = document.zoneForm;
  if ( form.elements['newZone[Units]'].value == 'Pixels' ) {
    form.elements['newZone[TempArea]'].value = area;
    toPixels( form.elements['newZone[MinAlarmPixels]'], area );
    toPixels( form.elements['newZone[MaxAlarmPixels]'], area );
    toPixels( form.elements['newZone[MinFilterPixels]'], area );
    toPixels( form.elements['newZone[MaxFilterPixels]'], area );
    toPixels( form.elements['newZone[MinBlobPixels]'], area );
    toPixels( form.elements['newZone[MaxBlobPixels]'], area );
  } else {
    form.elements['newZone[TempArea]'].value = Math.round( area/monitorArea * 100 );
    toPercent( form.elements['newZone[MinAlarmPixels]'], area );
    toPercent( form.elements['newZone[MaxAlarmPixels]'], area );
    toPercent( form.elements['newZone[MinFilterPixels]'], area );
    toPercent( form.elements['newZone[MaxFilterPixels]'], area );
    toPercent( form.elements['newZone[MinBlobPixels]'], area );
    toPercent( form.elements['newZone[MaxBlobPixels]'], area );
  }
}

function limitRange( field, minValue, maxValue ) {
  if ( field.value != '' )
    field.value = constrainValue( parseInt(field.value), parseInt(minValue), parseInt(maxValue) );
}

function limitFilter( field ) {
  field.value = (Math.floor((field.value-1)/2)*2) + 1;
  field.value = constrainValue(parseInt(field.value), 3, 15);
}

function limitArea( field ) {
  var minValue = 0;
  var maxValue = zone.Area;
  if ( document.zoneForm.elements['newZone[Units]'].value == "Percent" ) {
    maxValue = 100;
  }
  limitRange( field, minValue, maxValue );
}

function highlightOn( index ) {
  $('row'+index).addClass( 'highlight' );
  $('point'+index).addClass( 'highlight' );
}

function highlightOff( index ) {
  $('row'+index).removeClass( 'highlight' );
  $('point'+index).removeClass( 'highlight' );
}

function setActivePoint( index ) {
  highlightOff( index );
  $('row'+index).addClass( 'active' );
  $('point'+index).addClass( 'active' );
}

function unsetActivePoint( index ) {
  $('row'+index).removeClass( 'active' );
  $('point'+index).removeClass( 'active' );
}

function getCoordString() {
  var coords = new Array();
  for ( var i = 0; i < zone['Points'].length; i++ )
    coords[coords.length] = zone['Points'][i].x+','+zone['Points'][i].y;
  return( coords.join( " " ) );
}

function updateZoneImage() {
  var SVG = $('zoneSVG');
  var Poly = $('zonePoly');
  Poly.points.clear();
  for ( var i = 0; i < zone['Points'].length; i++ ) {
    var Point = SVG.createSVGPoint();
    Point.x = zone['Points'][i].x;
    Point.y = zone['Points'][i].y;
    Poly.points.appendItem( Point );
  }
}

function fixActivePoint( index ) {
  updateActivePoint( index );
  unsetActivePoint( index );
  updateZoneImage();
}

function constrainValue( value, loVal, hiVal ) {
  if ( value < loVal ) {
    return loVal;
  }
  if ( value > hiVal ) {
    return hiVal;
  }
  return value;
}

function updateActivePoint( index ) {
  var point = $('point'+index);
  var x = constrainValue( point.getStyle( 'left' ).toInt(), 0, maxX );
  var y = constrainValue( point.getStyle( 'top' ).toInt(), 0, maxY );

  $('newZone[Points]['+index+'][x]').value = x;
  $('newZone[Points]['+index+'][y]').value = y;
  zone['Points'][index].x = x;
  zone['Points'][index].y = y;
  var Point = $('zonePoly').points.getItem(index);
  Point.x =x;
  Point.y =y;
  updateArea();
}

function addPoint( index ) {
  var nextIndex = index+1;
  if ( index >= (zone['Points'].length-1) )
    nextIndex = 0;
  var newX = parseInt(Math.round((zone['Points'][index]['x']+zone['Points'][nextIndex]['x'])/2));
  var newY = parseInt(Math.round((zone['Points'][index]['y']+zone['Points'][nextIndex]['y'])/2));
  if ( nextIndex == 0 )
    zone['Points'][zone['Points'].length] = { 'x': newX, 'y': newY };
  else
    zone['Points'].splice( nextIndex, 0, { 'x': newX, 'y': newY } );
  drawZonePoints();
  // drawZonePoints calls updateZoneImage
  //updateZoneImage();
  //setActivePoint( nextIndex );
}

function delPoint( index ) {
  zone['Points'].splice( index, 1 );
  drawZonePoints();
}

function limitPointValue( point, loVal, hiVal ) {
  point.value = constrainValue(point.value, loVal, hiVal);
}

function updateArea( ) {
  area = Polygon_calcArea(zone['Points']);
  zone.Area = area;
  var form = $('zoneForm');
  form.elements['newZone[Area]'].value = area;
  if ( form.elements['newZone[Units]'].value == 'Percent' ) {
    form.elements['newZone[TempArea]'].value = Math.round( area/monitorArea*100 );
  } else if ( form.elements['newZone[Units]'].value == 'Pixels' ) {
    form.elements['newZone[TempArea]'].value = area;
  } else {
    alert("Unknown units: " + form.elements['newZone[Units]'].value);
  }
}

function updateX( index ) {
  limitPointValue( $('newZone[Points]['+index+'][x]'), 0, maxX );

  var point = $('point'+index);
  var x = $('newZone[Points]['+index+'][x]').get('value');

  point.setStyle( 'left', x+'px' );
  zone['Points'][index].x = x;
  var Point = $('zonePoly').points.getItem(index);
  Point.x = x;
}

function updateY( index ) {
  limitPointValue( $('newZone[Points]['+index+'][y]'), 0, maxY );

  var point = $('point'+index);
  var y = $('newZone[Points]['+index+'][y]').get('value');

  point.setStyle( 'top', y+'px' );
  zone['Points'][index].y = y;
  var Point = $('zonePoly').points.getItem(index);
  Point.y = y;
}

function saveChanges( element ) {
  var form = element.form;
  if ( validateForm( form ) ) {
    submitForm( form );
    if ( form.elements['newZone[Type]'].value == 'Privacy' ) {
      alert( 'Capture process for this monitor will be restarted for the Privacy zone changes to take effect.' );
    }
    return true;
  }
  return false;
}

function drawZonePoints() {
  $('imageFrame').getElements( 'div.zonePoint' ).each( function( element ) { element.destroy(); } );
  for ( var i = 0; i < zone['Points'].length; i++ ) {
    var div = new Element( 'div', {
      'id': 'point'+i,
      'class': 'zonePoint',
      'title': 'Point '+(i+1),
      'styles': {
        'left': zone['Points'][i].x,
        'top': zone['Points'][i].y
      }
    } );
    div.addEvent( 'mouseover', highlightOn.pass( i ) );
    div.addEvent( 'mouseout', highlightOff.pass( i ) );
    div.inject( $('imageFrame') );
    div.makeDraggable( { 
        'container': $('imageFrame'),
        'onStart': setActivePoint.pass( i ), 
        'onComplete': fixActivePoint.pass( i ),
        'onDrag': updateActivePoint.pass( i )
        } );
  }

  var tables = $('zonePoints').getElements( 'table' );
  tables.each( function( table ) { table.getElement( 'tbody' ).empty(); } );
  for ( var i = 0; i < zone['Points'].length; i++ ) {
    var row = new Element( 'tr', { 'id': 'row'+i } );
    row.addEvents( { 'mouseover': highlightOn.pass( i ), 'mouseout': highlightOff.pass( i ) } );
    var cell = new Element( 'td' );
    cell.set( 'text', i+1 );
    cell.inject( row );

    cell = new Element( 'td' );
    var input = new Element( 'input', { 'id': 'newZone[Points]['+i+'][x]', 'name': 'newZone[Points]['+i+'][x]', 'value': zone['Points'][i].x, 'size': 5 } );
    input.addEvent( 'input', updateX.pass( i ) );
    input.inject( cell );
    cell.inject( row );

    cell = new Element( 'td' );
    input = new Element( 'input', { 'id': 'newZone[Points]['+i+'][y]', 'name': 'newZone[Points]['+i+'][y]', 'value': zone['Points'][i].y, 'size': 5 } );
    input.addEvent( 'input', updateY.pass( i ) );
    input.inject( cell );
    cell.inject( row );

    cell = new Element( 'td' );
    new Element( 'button', { 'type': 'button', 'events': { 'click': addPoint.pass( i ) } } ).set( 'text', '+' ).inject( cell );
    if ( zone['Points'].length > 3 ) {
      cell.appendText(' ');
      new Element( 'button', { 'id': 'delete'+i, 'type': 'button', 'events': { 'click': delPoint.pass( i ) } } ).set( 'text', '-' ).inject( cell );
    }
    cell.inject( row );

    row.inject( tables[i%tables.length].getElement( 'tbody' ) );
  }
  // Sets up the SVG polygon
  updateZoneImage();
}

//
// Imported from watch.js and modified for new zone edit view
//

var alarmState = STATE_IDLE;
var lastAlarmState = STATE_IDLE;

function setAlarmState( currentAlarmState ) {
  alarmState = currentAlarmState;

  var stateString = "Unknown";
  var stateClass = "";
  if ( alarmState == STATE_ALARM )
    stateClass = "alarm";
  else if ( alarmState == STATE_ALERT )
    stateClass = "alert";
  $('stateValue').set( 'text', stateStrings[alarmState] );
  if ( stateClass )
    $('stateValue').setProperty( 'class', stateClass );
  else
    $('stateValue').removeProperty( 'class' );

  var isAlarmed = ( alarmState == STATE_ALARM || alarmState == STATE_ALERT );
  var wasAlarmed = ( lastAlarmState == STATE_ALARM || lastAlarmState == STATE_ALERT );

  var newAlarm = ( isAlarmed && !wasAlarmed );
  var oldAlarm = ( !isAlarmed && wasAlarmed );

  if ( newAlarm ) {
    if ( SOUND_ON_ALARM ) {
      // Enable the alarm sound
      if ( !canPlayPauseAudio )
        $('alarmSound').removeClass( 'hidden' );
      else
        $('MediaPlayer').Play();
    }
  }
  if ( SOUND_ON_ALARM ) {
    if ( oldAlarm ) {
      // Disable alarm sound
      if ( !canPlayPauseAudio )
        $('alarmSound').addClass( 'hidden' );
      else
        $('MediaPlayer').Stop();
    }
  }
  lastAlarmState = alarmState;
}

var streamCmdParms = "view=request&request=stream&connkey="+connKey;
var streamCmdReq = new Request.JSON( {
  url: monitorUrl,
  method: 'get',
  timeout: AJAX_TIMEOUT,
  link: 'cancel',
  onSuccess: getStreamCmdResponse
} );
var streamCmdTimer = null;

var streamStatus;

function getStreamCmdResponse( respObj, respText ) {
  watchdogOk("stream");
  if ( streamCmdTimer )
    streamCmdTimer = clearTimeout( streamCmdTimer );

  if ( respObj.result == 'Ok' ) {
    streamStatus = respObj.status;
    $('fpsValue').set( 'text', streamStatus.fps );

    setAlarmState( streamStatus.state );

    var delayString = secsToTime( streamStatus.delay );

    if ( streamStatus.paused == true ) {
      streamCmdPause( false );
    } else if ( streamStatus.delayed == true && streamStatus.rate == 1 ) {
      streamCmdPlay( false );
    }
  } else {
    checkStreamForErrors("getStreamCmdResponse", respObj);//log them
    if ( ! streamPause ) {
      // Try to reload the image stream.
      var streamImg = $('liveStream'+monitorId);
      if ( streamImg )
        streamImg.src = streamImg.src.replace(/rand=\d+/i, 'rand='+Math.floor((Math.random() * 1000000) ));
    }
  }

  if ( ! streamPause ) {
    var streamCmdTimeout = statusRefreshTimeout;
    if ( alarmState == STATE_ALARM || alarmState == STATE_ALERT )
      streamCmdTimeout = streamCmdTimeout/5;
    streamCmdTimer = streamCmdQuery.delay( streamCmdTimeout );
  }
}

var streamPause = false;

function streamCmdPauseToggle() {
  if ( streamPause == true ) {
    streamCmdPlay( true );
    streamPause = false;
    document.getElementById("pauseBtn").value = pauseString;
  } else {
    streamCmdPause( true );
    streamPause = true;
    document.getElementById("pauseBtn").value = playString;
  }
}

function streamCmdPause( action ) {
  if ( action )
    streamCmdReq.send( streamCmdParms+"&command="+CMD_PAUSE );
}

function streamCmdPlay( action ) {
  if ( action )
    streamCmdReq.send( streamCmdParms+"&command="+CMD_PLAY );
}

function streamCmdStop( action ) {
  if ( action )
    streamCmdReq.send( streamCmdParms+"&command="+CMD_STOP );
}

function streamCmdQuery() {
  streamCmdReq.send( streamCmdParms+"&command="+CMD_QUERY );
}

var statusCmdParms = "view=request&request=status&entity=monitor&id="+monitorId+"&element[]=Status&element[]=FrameRate";
var statusCmdReq = new Request.JSON( {
  url: monitorUrl,
  method: 'get',
  data: statusCmdParms,
  timeout: AJAX_TIMEOUT,
  link: 'cancel',
  onSuccess: getStatusCmdResponse
} );
var statusCmdTimer = null;

function getStatusCmdResponse( respObj, respText ) {
  watchdogOk("status");
  if ( statusCmdTimer )
    statusCmdTimer = clearTimeout( statusCmdTimer );

  if ( respObj.result == 'Ok' ) {
    $('fpsValue').set( 'text', respObj.monitor.FrameRate );
    setAlarmState( respObj.monitor.Status );
  } else
    checkStreamForErrors("getStatusCmdResponse", respObj);

  if ( ! streamPause ) {
    var statusCmdTimeout = statusRefreshTimeout;
    if ( alarmState == STATE_ALARM || alarmState == STATE_ALERT )
      statusCmdTimeout = statusCmdTimeout/5;
    statusCmdTimer = statusCmdQuery.delay( statusCmdTimeout );
  }
}

function statusCmdQuery() {
  statusCmdReq.send();
}

function fetchImage( streamImage ) {
  streamImage.src = streamImage.src.replace(/rand=\d+/i,'rand='+Math.floor((Math.random() * 1000000) ));
}

function appletRefresh() {
  if ( streamStatus && (!streamStatus.paused && !streamStatus.delayed) ) {
    var streamImg = $('liveStream');
    var parent = streamImg.getParent();
    streamImg.dispose();
    streamImg.inject( parent );
    if ( appletRefreshTime )
      appletRefresh.delay( appletRefreshTime*1000 );
  } else {
    appletRefresh.delay( 15*1000 ); //if we are paused or delayed check every 15 seconds if we are live yet...
  }
}

var watchdogInactive = {
  'stream': false,
  'status': false
};

var watchdogFunctions = {
  'stream': streamCmdQuery,
  'status': statusCmdQuery
};

//Make sure the various refreshes are still taking effect
function watchdogCheck( type ) {
  if ( watchdogInactive[type] ) {
    console.log( "Detected streamWatch of type: " + type + " stopped, restarting" );
    watchdogFunctions[type]();
    watchdogInactive[type] = false;
  } else {
    watchdogInactive[type] = true;
  }
}

function watchdogOk( type ) {
  watchdogInactive[type] = false;
}

function initPage() {
  var form = document.zoneForm;

  //form.elements['newZone[Name]'].disabled = true;
  //form.elements['newZone[Type]'].disabled = true;
  form.presetSelector.disabled = true;
  //form.elements['newZone[Units]'].disabled = true;
  form.newAlarmRgbR.disabled = true;
  form.newAlarmRgbG.disabled = true;
  form.newAlarmRgbB.disabled = true;
  form.elements['newZone[CheckMethod]'].disabled = true;
  form.elements['newZone[MinPixelThreshold]'].disabled = true;
  form.elements['newZone[MaxPixelThreshold]'].disabled = true;
  form.elements['newZone[MinAlarmPixels]'].disabled = true;
  form.elements['newZone[MaxAlarmPixels]'].disabled = true;
  form.elements['newZone[FilterX]'].disabled = true;
  form.elements['newZone[FilterY]'].disabled = true;
  form.elements['newZone[MinFilterPixels]'].disabled = true;
  form.elements['newZone[MaxFilterPixels]'].disabled = true;
  form.elements['newZone[MinBlobPixels]'].disabled = true;
  form.elements['newZone[MaxBlobPixels]'].disabled = true;
  form.elements['newZone[MinBlobs]'].disabled = true;
  form.elements['newZone[MaxBlobs]'].disabled = true;
  form.elements['newZone[OverloadFrames]'].disabled = true;

  applyZoneType();

  if ( form.elements['newZone[Units]'].value == 'Percent' ) {
    applyZoneUnits();
  }

  applyCheckMethod();
  drawZonePoints();

  //
  // Imported from watch.js and modified for new zone edit view
  //

  var delay = (Math.random()+0.1)*statusRefreshTimeout;
  //console.log("Delay for status updates is: " + delay );
  if ( streamMode == "single" ) {
    statusCmdTimer = statusCmdQuery.delay( delay );
    watchdogCheck.pass('status').periodical(statusRefreshTimeout*2);
  } else {
    streamCmdTimer = streamCmdQuery.delay( delay );
    watchdogCheck.pass('stream').periodical(statusRefreshTimeout*2);
  }

  if ( canStreamNative || streamMode == "single" ) {
    var streamImg = $('imageFrame').getElement('img');
    if ( !streamImg )
      streamImg = $('imageFrame').getElement('object');
    if ( streamMode == "single" ) {
      streamImg.addEvent( 'click', fetchImage.pass( streamImg ) );
      fetchImage.pass( streamImg ).periodical( imageRefreshTimeout );
    }
  }

  if ( refreshApplet && appletRefreshTime )
    appletRefresh.delay( appletRefreshTime*1000 );
}

function Polygon_calcArea( coords ) {
  var n_coords = coords.length;
  var float_area = 0.0;

  for ( i = 0, j = n_coords-1; i < n_coords; j = i++ ) {
    var trap_area = ( ( coords[i].x - coords[j].x ) * ( coords[i].y + coords[j].y ) ) / 2;
    float_area += trap_area;
    //printf( "%.2f (%.2f)\n", float_area, trap_area );
  }
  return Math.round( Math.abs( float_area ) );
}

window.addEvent( 'domready', initPage );