/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is OEone Calendar Code, released October 31st, 2001.
 *
 * The Initial Developer of the Original Code is
 * OEone Corporation.
 * Portions created by the Initial Developer are Copyright (C) 2001
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s): Garth Smedley <garths@oeone.com>
 *                 Mike Potter <mikep@oeone.com>
 *                 Colin Phillips <colinp@oeone.com> 
 *                 Chris Charabaruk <ccharabaruk@meldstar.com>
 *                 ArentJan Banck <ajbanck@planet.nl>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */



/**
*   Enable/Disable Repeat items
*/

function updateRepeatItemEnabled()
{
   var exceptionsDateButton = document.getElementById( "exception-dates-button" );
   var exceptionsDateText = document.getElementById( "exception-dates-text" );

   var repeatCheckBox = document.getElementById( "repeat-checkbox" );
   
   var repeatDisableList = document.getElementsByAttribute( "disable-controller", "repeat" );
   
   if( repeatCheckBox.checked )
   {
      exceptionsDateButton.setAttribute( "popup", "oe-date-picker-popup" );
      exceptionsDateText.setAttribute( "popup", "oe-date-picker-popup" );

      // call remove attribute beacuse some widget code checks for the presense of a 
      // disabled attribute, not the value.
      for( var i = 0; i < repeatDisableList.length; ++i )
      {
         if( repeatDisableList[i].getAttribute( "today" ) != "true" )
            repeatDisableList[i].removeAttribute( "disabled" );
      }
   }
   else
   {
      exceptionsDateButton.removeAttribute( "popup" );
      exceptionsDateText.removeAttribute( "popup" );

      for( var j = 0; j < repeatDisableList.length; ++j )
      {
         repeatDisableList[j].setAttribute( "disabled", "true" );
      }
   }
   
   // udpate plural/singular
   
   updateRepeatPlural();
   
   updateAlarmPlural();
   
   // update until items whenever repeat changes
   
   updateUntilItemEnabled();
   
   // extra interface depending on units
   
   updateRepeatUnitExtensions();
}

/**
*   Update plural singular menu items
*/

function updateRepeatPlural()
{
    updateMenuPlural( "repeat-length-field", "repeat-length-units" );
}

/**
*   Update plural singular menu items
*/

function updateAlarmPlural()
{
    updateMenuPlural( "alarm-length-field", "alarm-length-units" );
}


/**
*   Update plural singular menu items
*/

function updateMenuPlural( lengthFieldId, menuId )
{
    var field = document.getElementById( lengthFieldId );
    var menu = document.getElementById( menuId );
   
    // figure out whether we should use singular or plural 
    
    var length = field.value;
    
    var newLabelNumber; 
    
    if( Number( length ) > 1  )
    {
        newLabelNumber = "labelplural"
    }
    else
    {
        newLabelNumber = "labelsingular"
    }
    
    // see what we currently show and change it if required
    
    var oldLabelNumber = menu.getAttribute( "labelnumber" );
    
    if( newLabelNumber != oldLabelNumber )
    {
        // remember what we are showing now
        
        menu.setAttribute( "labelnumber", newLabelNumber );
        
        // update the menu items
        
        var items = menu.getElementsByTagName( "menuitem" );
        
        for( var i = 0; i < items.length; ++i )
        {
            var menuItem = items[i];
            var newLabel = menuItem.getAttribute( newLabelNumber );
            menuItem.label = newLabel;
            menuItem.setAttribute( "label", newLabel );
            
        }
        
        // force the menu selection to redraw
        
        var saveSelectedIndex = menu.selectedIndex;
        menu.selectedIndex = -1;
        menu.selectedIndex = saveSelectedIndex;
    }
}

/**
*   Enable/Disable Until items
*/

function updateUntilItemEnabled()
{
   var repeatUntilRadio = document.getElementById( "repeat-until-radio" );
   var repeatCheckBox = document.getElementById( "repeat-checkbox" );
   
   var repeatEndText = document.getElementById( "repeat-end-date-text" );
   var repeatEndPicker = document.getElementById( "repeat-end-date-button" );
  
   if( repeatCheckBox.checked && repeatUntilRadio.selected  )
   {
      repeatEndText.removeAttribute( "disabled"  );
      repeatEndText.setAttribute( "popup", "oe-date-picker-popup" );
      repeatEndPicker.removeAttribute( "disabled" );
      repeatEndPicker.setAttribute( "popup", "oe-date-picker-popup" );
   }
   else
   {
      repeatEndText.setAttribute( "disabled", "true" );
      repeatEndText.removeAttribute( "popup" );
      repeatEndPicker.setAttribute( "disabled", "true" );
      repeatEndPicker.removeAttribute( "popup" );
   }
}


function updateRepeatUnitExtensions( )
{
   var repeatMenu = document.getElementById( "repeat-length-units" );
   var weekExtensions = document.getElementById( "repeat-extenstions-week" );
   var monthExtensions = document.getElementById( "repeat-extenstions-month" );

   //FIX ME! WHEN THE WINDOW LOADS, THIS DOESN'T EXIST
   if( repeatMenu.selectedItem )
   {
      switch( repeatMenu.selectedItem.value )
      {
           case "days":
               weekExtensions.setAttribute( "collapsed", "true" );
               monthExtensions.setAttribute( "collapsed", "true" );
           break;
           
           case "weeks":
               weekExtensions.removeAttribute( "collapsed" );
               monthExtensions.setAttribute( "collapsed", "true" );
               updateAdvancedWeekRepeat();
           break;
           
           case "months":
               weekExtensions.setAttribute( "collapsed", "true" );
               monthExtensions.removeAttribute( "collapsed" );
               updateAdvancedRepeatDayOfMonth();
           break;
           
           case "years":
               weekExtensions.setAttribute( "collapsed", "true" );
               monthExtensions.setAttribute( "collapsed", "true" );
           break;
       
      }
      sizeToContent();  
   }
   
}



/**
*   Enable/Disable Start/End items
*/

function updateStartEndItemEnabled()
{
   var allDayCheckBox = document.getElementById( "all-day-event-checkbox" );
   
   var startTimeLabel = document.getElementById( "start-time-label" );
   var startTimePicker = document.getElementById( "start-time-button" );
   var startTimeText = document.getElementById( "start-time-text" );
   
   var endTimeLabel = document.getElementById( "end-time-label" );
   var endTimePicker = document.getElementById( "end-time-button" );
   var endTimeText = document.getElementById( "end-time-text" );
   
   if( allDayCheckBox.checked )
   {
      // disable popups by removing the popup attribute
      
      startTimeLabel.setAttribute( "disabled", "true" );
      startTimeText.setAttribute( "disabled", "true" );
      startTimeText.removeAttribute( "popup" );
      startTimePicker.setAttribute( "disabled", "true" );
      startTimePicker.removeAttribute( "popup" );
      
      endTimeLabel.setAttribute( "disabled", "true" );
      endTimeText.setAttribute( "disabled", "true" );
      endTimeText.removeAttribute( "popup" );
      endTimePicker.setAttribute( "disabled", "true" );
      endTimePicker.removeAttribute( "popup" );
   }
   else
   {
      // enable popups by setting the popup attribute
      
      startTimeLabel.removeAttribute( "disabled" );
      startTimeText.removeAttribute( "disabled" );
      startTimeText.setAttribute( "popup", "oe-time-picker-popup" );
      startTimePicker.removeAttribute( "disabled" );
      startTimePicker.setAttribute( "popup", "oe-time-picker-popup" );
      
      endTimeLabel.removeAttribute( "disabled" );
      endTimeText.removeAttribute( "disabled" );
      endTimeText.setAttribute( "popup", "oe-time-picker-popup" );
      endTimePicker.removeAttribute( "disabled" );
      endTimePicker.setAttribute( "popup", "oe-time-picker-popup" );
   }
}




/**
*   Handle key down in repeat field
*/

function repeatLengthKeyDown( repeatField )
{
    updateRepeatPlural();
}

/**
*   Handle key down in alarm field
*/

function alarmLengthKeyDown( repeatField )
{
    updateAlarmPlural();
}


function repeatUnitCommand( repeatMenu )
{
    updateRepeatUnitExtensions();
}


/*
** Functions for advanced repeating elements
*/

function setAdvancedWeekRepeat()
{
   var checked = false;

   if( gEvent.recurWeekdays > 0 )
   {
      for( var i = 0; i < 7; i++ )
      {
         checked = ( ( gEvent.recurWeekdays | eval( "kRepeatDay_"+i ) ) == eval( gEvent.recurWeekdays ) );
         
         setFieldValue( "advanced-repeat-week-"+i, checked, "checked" );

         setFieldValue( "advanced-repeat-week-"+i, false, "today" );
      }
   }
  
   //get the day number for today.
   var startTime = getDateTimeFieldValue( "start-date-text" );
   
   var dayNumber = startTime.getDay();
   
   setFieldValue( "advanced-repeat-week-"+dayNumber, "true", "checked" );

   setFieldValue( "advanced-repeat-week-"+dayNumber, "true", "disabled" );

   setFieldValue( "advanced-repeat-week-"+dayNumber, "true", "today" );
   
}

/*
** Functions for advanced repeating elements
*/

function getAdvancedWeekRepeat()
{
   var Total = 0;

   for( var i = 0; i < 7; i++ )
   {
      if( getFieldValue( "advanced-repeat-week-"+i, "checked" ) == true )
      {
         Total += eval( "kRepeatDay_"+i );
      }
   }
   return( Total );
}

/*
** function to set the menu items text
*/
function updateAdvancedWeekRepeat()
{
   //get the day number for today.
   var startTime = getDateTimeFieldValue( "start-date-text" );
   
   var dayNumber = startTime.getDay();

   //uncheck them all if the repeat checkbox is checked
   var repeatCheckBox = document.getElementById( "repeat-checkbox" );
   
   if( repeatCheckBox.checked )
   {
      //uncheck them all
      for( var i = 0; i < 7; i++ )
      {
         setFieldValue( "advanced-repeat-week-"+i, false, "disabled" );
      
         setFieldValue( "advanced-repeat-week-"+i, false, "today" );
      }
   }

   setFieldValue( "advanced-repeat-week-"+dayNumber, "true", "checked" );

   setFieldValue( "advanced-repeat-week-"+dayNumber, "true", "disabled" );

   setFieldValue( "advanced-repeat-week-"+dayNumber, "true", "today" );
}

/*
** function to set the menu items text
*/
function updateAdvancedRepeatDayOfMonth()
{
   //get the day number for today.
   var startTime = getDateTimeFieldValue( "start-date-text" );
   
   var dayNumber = startTime.getDate();

   var dayExtension = getDayExtension( dayNumber );

   var weekNumber = getWeekNumberOfMonth();

   document.getElementById( "advanced-repeat-dayofmonth" ).setAttribute( "label", "On the "+dayNumber+dayExtension+" of the month" );
   
   if( weekNumber == 4 && isLastDayOfWeekOfMonth() )
   {
      //enable
      document.getElementById( "advanced-repeat-dayofweek" ).setAttribute( "label", getWeekNumberText( weekNumber )+" "+getDayOfWeek( dayNumber )+" of the month" );

      document.getElementById( "advanced-repeat-dayofweek-last" ).removeAttribute( "collapsed" );

      document.getElementById( "advanced-repeat-dayofweek-last" ).setAttribute( "label", "Last "+getDayOfWeek( dayNumber )+" of the month" );
   }
   else if( weekNumber == 4 && !isLastDayOfWeekOfMonth() )
   {
      document.getElementById( "advanced-repeat-dayofweek" ).setAttribute( "label", getWeekNumberText( weekNumber )+" "+getDayOfWeek( dayNumber )+" of the month" );

      document.getElementById( "advanced-repeat-dayofweek-last" ).setAttribute( "collapsed", "true" );
   }
   else
   {
      //disable
      document.getElementById( "advanced-repeat-dayofweek" ).setAttribute( "collapsed", "true" );

      document.getElementById( "advanced-repeat-dayofweek-last" ).setAttribute( "label", "Last "+getDayOfWeek( dayNumber )+" of the month" );
   }

   
}

/*
** function to enable or disable the add exception button
*/
function updateAddExceptionButton()
{
   //get the date from the picker
   var datePickerValue = getDateTimeFieldValue( "exception-dates-text" );
   
   if( isAlreadyException( datePickerValue ) || document.getElementById( "repeat-checkbox" ).getAttribute( "checked" ) != "true" )
   {
      document.getElementById( "exception-add-button" ).setAttribute( "disabled", "true" );
   }
   else
   {
      document.getElementById( "exception-add-button" ).removeAttribute( "disabled" );
   }
}

function removeSelectedExceptionDate()
{
   var Listbox = document.getElementById( "exception-dates-listbox" );

   var SelectedItem = Listbox.selectedItem;

   if( SelectedItem )
      Listbox.removeChild( SelectedItem );
}

function addException( dateToAdd )
{
   if( !dateToAdd )
   {
      //get the date from the date and time box.
      //returns a date object
      var dateToAdd = getDateTimeFieldValue( "exception-dates-text" );
   }
   
   if( isAlreadyException( dateToAdd ) )
      return;

   var DateLabel = formatDate( dateToAdd );

   //add a row to the listbox
   document.getElementById( "exception-dates-listbox" ).appendItem( DateLabel, dateToAdd.getTime() );

   sizeToContent();
}

function isAlreadyException( dateObj )
{
   //check to make sure that the date is not already added.
   var listbox = document.getElementById( "exception-dates-listbox" );

   for( var i = 0; i < listbox.childNodes.length; i++ )
   {
      var dateToMatch = new Date( );
      
      dateToMatch.setTime( listbox.childNodes[i].value );
      if( dateToMatch.getMonth() == dateObj.getMonth() && dateToMatch.getFullYear() == dateObj.getFullYear() && dateToMatch.getDate() == dateObj.getDate() )
         return true;
   }
   return false;
}

function getDayExtension( dayNumber )
{
   switch( dayNumber )
   {
      case 1:
      case 21:
      case 31:
         return( "st" );
      case 2:
      case 22:
         return( "nd" );
      case 3:
      case 23:
         return( "rd" );
      default:
         return( "th" );
   }
}

function getDayOfWeek( )
{
   //get the day number for today.
   var startTime = getDateTimeFieldValue( "start-date-text" );
   
   var dayNumber = startTime.getDay();

   var dateStringBundle = srGetStrBundle("chrome://calendar/locale/dateFormat.properties");

   //add one to the dayNumber because in the above prop. file, it starts at day1, but JS starts at 0
   var oneBasedDayNumber = parseInt( dayNumber ) + 1;
   
   return( dateStringBundle.GetStringFromName( "day."+oneBasedDayNumber+".name" ) );
   
}

function getWeekNumberOfMonth()
{
   //get the day number for today.
   var startTime = getDateTimeFieldValue( "start-date-text" );
   
   var oldStartTime = startTime;

   var thisMonth = startTime.getMonth();
   
   var monthToCompare = thisMonth;

   var weekNumber = 0;

   while( monthToCompare == thisMonth )
   {
      startTime = new Date( startTime.getTime() - ( 1000 * 60 * 60 * 24 * 7 ) );

      monthToCompare = startTime.getMonth();
      
      weekNumber++;
   }
   
   return( weekNumber );
}

function isLastDayOfWeekOfMonth()
{
   //get the day number for today.
   var startTime = getDateTimeFieldValue( "start-date-text" );
   
   var oldStartTime = startTime;

   var thisMonth = startTime.getMonth();
   
   var monthToCompare = thisMonth;

   var weekNumber = 0;

   while( monthToCompare == thisMonth )
   {
      startTime = new Date( startTime.getTime() - ( 1000 * 60 * 60 * 24 * 7 ) );

      monthToCompare = startTime.getMonth();
      
      weekNumber++;
   }
   
   if( weekNumber > 3 )
   {
      var nextWeek = new Date( oldStartTime.getTime() + ( 1000 * 60 * 60 * 24 * 7 ) );

      if( nextWeek.getMonth() != thisMonth )
      {
         //its the last week of the month
        return( true );
      }
   }

   return( false );
}

/* FILE ATTACHMENTS */

function removeSelectedAttachment()
{
   var Listbox = document.getElementById( "attachmentBucket" );

   var SelectedItem = Listbox.selectedItem;

   if( SelectedItem )
      Listbox.removeChild( SelectedItem );
}

function addAttachment( attachmentToAdd )
{
   if( !attachmentToAdd )
   {
      return;
   }
   
   //add a row to the listbox
   document.getElementById( "attachmentBucket" ).appendItem( attachmentToAdd.url, attachmentToAdd.url );

   sizeToContent();
}


function getWeekNumberText( weekNumber )
{
   switch( weekNumber )
   {
   case 1:
      return( "First" );
   case 2:
      return( "Second" );
   case 3:
      return( "Third" );
   case 4:
      return( "Fourth" );
   case 5:
      return( "Last" );
   default:
      return( false );
   }

}



/* URL */
function launchBrowser()
{
   //get the URL from the text box
   var UrlToGoTo = document.getElementById( "uri-field" ).value;
   
   //launch the browser to that URL
   opener.open( UrlToGoTo, "calendar-opened-window" );
}



/**
*   Helper function for filling the form, set the value of a property of a XUL element
*
* PARAMETERS
*      elementId     - ID of XUL element to set 
*      newValue      - value to set property to ( if undefined no change is made )
*      propertyName  - OPTIONAL name of property to set, default is "value", use "checked" for 
*                               radios & checkboxes, "data" for drop-downs
*/

function setFieldValue( elementId, newValue, propertyName  )
{
   var undefined;
   
   if( newValue !== undefined )
   {
      var field = document.getElementById( elementId );
      
      if( newValue === false )
      {
         field.removeAttribute( propertyName );
      }
      else
      {
         if( propertyName )
         {
            field.setAttribute( propertyName, newValue );
         }
         else
         {
            field.value = newValue;
         }
      }
   }
}


/**
*   Helper function for getting data from the form, 
*   Get the value of a property of a XUL element
*
* PARAMETERS
*      elementId     - ID of XUL element to get from 
*      propertyName  - OPTIONAL name of property to set, default is "value", use "checked" for 
*                               radios & checkboxes, "data" for drop-downs
*   RETURN
*      newValue      - value of property
*/

function getFieldValue( elementId, propertyName )
{
   var field = document.getElementById( elementId );
   
   if( propertyName )
   {
      return field[ propertyName ];
   }
   else
   {
      return field.value;
   }
}

/**
*   Helper function for getting a date/time from the form.
*   The element must have been set up with  setDateFieldValue or setTimeFieldValue.
*
* PARAMETERS
*      elementId     - ID of XUL element to get from 
* RETURN
*      newValue      - Date value of element
*/


function getDateTimeFieldValue( elementId )
{
   var field = document.getElementById( elementId );
   return field.editDate;
}



/**
*   Helper function for filling the form, set the value of a date field
*
* PARAMETERS
*      elementId     - ID of time textbox to set 
*      newDate       - Date Object to use
*/

function setDateFieldValue( elementId, newDate  )
{
   // set the value to a formatted date string 
   
   var field = document.getElementById( elementId );
   field.value = formatDate( newDate );
   
   // add an editDate property to the item to hold the Date object 
   // used in onDatePick to update the date from the date picker.
   // used in getDateTimeFieldValue to get the Date back out.
   
   // we clone the date object so changes made in place do not propagte 
   
   field.editDate = new Date( newDate );
}


/**
*   Helper function for filling the form, set the value of a time field
*
* PARAMETERS
*      elementId     - ID of time textbox to set 
*      newDate       - Date Object to use
*/

function setTimeFieldValue( elementId, newDate  )
{
   // set the value to a formatted time string 

   var field = document.getElementById( elementId );
   field.value = formatTime( newDate );
   
   // add an editDate property to the item to hold the Date object 
   // used in onTimePick to update the date from the time picker.
   // used in getDateTimeFieldValue to get the Date back out.
   
   // we clone the date object so changes made in place do not propagte 
   
   field.editDate = new Date( newDate );
}


/**
*   Take a Date object and return a displayable date string i.e.: May 5, 1959
*  :TODO: This should be moved into DateFormater and made to use some kind of
*         locale or user date format preference.
*/

function formatDate( date )
{
   return( opener.gCalendarWindow.dateFormater.getFormatedDate( date ) );
}


/**
*   Take a Date object and return a displayable time string i.e.: 12:30 PM
*/

function formatTime( time )
{
   var timeString = opener.gCalendarWindow.dateFormater.getFormatedTime( time );
   return timeString;
}


function debug( Text )
{
   dump( "\n"+ Text + "\n");

}