/* toggle visibility of an element by its id

 * & set current visibility status in a cookie

 * XXX whenever used outside of preferences, don't forget to

 *     move me in a more appropriate place

 */

var prefsValues = {};

function togglePrefVisibility(elemId) {

    clearPreviousMessages();

    jQuery('#' + elemId).toggleClass('hidden');

}

function closeFieldset(fieldsetid){

    var linklabel = _('open all');

    var linkhref = 'javascript:openFieldset("' +fieldsetid + '")';

    _toggleFieldset(fieldsetid, 1, linklabel, linkhref);

}

function openFieldset(fieldsetid){

    var linklabel = _('close all');

    var linkhref = 'javascript:closeFieldset("'+ fieldsetid + '")';

    _toggleFieldset(fieldsetid, 0, linklabel, linkhref);

}

function _toggleFieldset(fieldsetid, closeaction, linklabel, linkhref){

    jQuery('#'+fieldsetid).find('div.openlink').each(function(){

	    var link = A({'href' : "javascript:noop();",

			  'onclick' : linkhref},

			  linklabel);

	    jQuery(this).empty().append(link);

	});

    jQuery('#'+fieldsetid).find('fieldset[id]').each(function(){

	    var fieldset = jQuery(this);

	    if(closeaction){

		fieldset.addClass('hidden');

	    }else{

		fieldset.removeClass('hidden');

		linkLabel = (_('open all'));

	    }

	});

}

function validatePrefsForm(formid){

    clearPreviousMessages();

    clearPreviousErrors(formid);

    return validateForm(formid, null,  submitSucces, submitFailure);

}

function submitFailure(formid){

    var form = jQuery('#'+formid);

    var dom = DIV({'class':'critical'},

		  _("please correct errors below"));

    jQuery(form).find('div.formsg').empty().append(dom);

    // clearPreviousMessages()

    jQuery(form).find('span.error').next().focus();

}

function submitSucces(url, formid){

    var form = jQuery('#'+formid);

    setCurrentValues(form);

    var dom = DIV({'class':'msg'},

		  _("changes applied"));

    jQuery(form).find('div.formsg').empty().append(dom);

    jQuery(form).find('input').removeClass('changed');

    checkValues(form, true);

    return;

}

function clearPreviousMessages() {

    jQuery('div#appMsg').addClass('hidden');

    jQuery('div.formsg').empty();

}

function clearPreviousErrors(formid) {

    jQuery('#err-value:' + formid).remove();

}

function checkValues(form, success){

    var unfreezeButtons = false;

    jQuery(form).find('select').each(function () {

	    unfreezeButtons = _checkValue(jQuery(this), unfreezeButtons);

	});

    jQuery(form).find('[type=text]').each(function () {

	    unfreezeButtons = _checkValue(jQuery(this), unfreezeButtons);

	});

    jQuery(form).find('input[type=radio]:checked').each(function () {

            unfreezeButtons = _checkValue(jQuery(this), unfreezeButtons);

     });

    if (unfreezeButtons){

	unfreezeFormButtons(form.attr('id'));

    }else{

	if (!success){

	    clearPreviousMessages();

	}

	clearPreviousErrors(form.attr('id'));

	freezeFormButtons(form.attr('id'));

    }

}

function _checkValue(input, unfreezeButtons){

    var currentValue = prefsValues[input.attr('name')];

     if (currentValue != input.val()){

	 input.addClass('changed');

	 unfreezeButtons = true;

     }else{

	 input.removeClass('changed');

	 jQuery("span[id=err-" + input.attr('id') + "]").remove();

     }

     input.removeClass('error');

     return unfreezeButtons;

}

function setCurrentValues(form){

    jQuery(form).find('input[name^=value]').each(function () {

	    var input = jQuery(this);

	    if(input.attr('type') == 'radio'){

		// NOTE: there seems to be a bug with jQuery(input).attr('checked')

		//       in our case, we can't rely on its value, we use

		//       the DOM API instead.

		if(input[0].checked){

		    prefsValues[input.attr('name')] = input.val();

		}

	    }else{

		prefsValues[input.attr('name')] = input.val();

	    }

	});

}

function initEvents(){

  jQuery('form').each(function() {

	  var form = jQuery(this);

	  freezeFormButtons(form.attr('id'));

	  form.find('input[type=text]').keyup(function(){

		  checkValues(form);

          });

	  form.find('input[type=radio]').change(function(){

		  checkValues(form);

          });

	  form.find('select').change(function(){

		  checkValues(form);

          });

	  setCurrentValues(form);

    });

}

$(document).ready(function() {

	initEvents();

});