/* 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();
});