/*

 *  :organization: Logilab

 *  :copyright: 2003-2008 LOGILAB S.A. (Paris, FRANCE), all rights reserved.

 *  :contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr

 */

CubicWeb.require('htmlhelpers.js');

CubicWeb.require('ajax.js');

//============= filter form functions ========================================//

function copyParam(origparams, newparams, param) {

    var index = findValue(origparams[0], param);

    if (index > -1) {

	newparams[param] = origparams[1][index];

    }

}

function facetFormContent(form) {

    var names = [];

    var values = [];

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

        var facetName = jQuery(this).find('.facetTitle').attr('cubicweb:facetName');

        var facetValues = jQuery(this).find('.facetValueSelected').each(function(x) {

  	    names.push(facetName);

  	    values.push(this.getAttribute('cubicweb:value'));

        });

    });

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

        names.push(this.name);

        values.push(this.value);

    });

    jQuery(form).find('select option[selected]').each(function () {

	names.push(this.parentNode.name);

	values.push(this.value);

    });

    return [names, values];

}

function buildRQL(divid, vid, paginate, vidargs) {

    jQuery(CubicWeb).trigger('facets-content-loading', [divid, vid, paginate, vidargs]);

    var form = getNode(divid+'Form');

    var zipped = facetFormContent(form);

    zipped[0].push('facetargs');

    zipped[1].push(vidargs);

    var d = asyncRemoteExec('filter_build_rql', zipped[0], zipped[1]);

    d.addCallback(function(result) {

	var rql = result[0];

	var $bkLink = jQuery('#facetBkLink');

	if ($bkLink.length) {

	    var bkUrl = $bkLink.attr('cubicweb:target') + '&path=view?rql=' + rql;

	    if (vid) {

		bkUrl += '&vid=' + vid;

	    }

	    $bkLink.attr('href', bkUrl);

	}

	var toupdate = result[1];

	var extraparams = vidargs;

	var displayactions = jQuery('#' + divid).attr('cubicweb:displayactions');

	if (displayactions) { extraparams['displayactions'] = displayactions; }

	if (paginate) { extraparams['paginate'] = '1'; }

	// copy some parameters

	// XXX cleanup vid/divid mess

	// if vid argument is specified , the one specified in form params will

	// be overriden by replacePageChunk

	copyParam(zipped, extraparams, 'vid');

	extraparams['divid'] = divid;

	copyParam(zipped, extraparams, 'divid');

	copyParam(zipped, extraparams, 'subvid');

	copyParam(zipped, extraparams, 'fromformfilter');

	// paginate used to know if the filter box is acting, in which case we

	// want to reload action box to match current selection (we don't want

	// this from a table filter)

	replacePageChunk(divid, rql, vid, extraparams, true, function() {

	  jQuery(CubicWeb).trigger('facets-content-loaded', [divid, rql, vid, extraparams]);

	});

	if (paginate) {

	    // FIXME the edit box might not be displayed in which case we don't

	    // know where to put the potential new one, just skip this case

	    // for now

	    if (jQuery('#edit_box').length) {

		reloadComponent('edit_box', rql, 'boxes', 'edit_box');

	    }

	    if (jQuery('#breadcrumbs').length) {

		reloadComponent('breadcrumbs', rql, 'components', 'breadcrumbs');

	    }

	}

	var d = asyncRemoteExec('filter_select_content', toupdate, rql);

	d.addCallback(function(updateMap) {

	    for (facetId in updateMap) {

		var values = updateMap[facetId];

		jqNode(facetId).find('.facetCheckBox').each(function () {

		    var value = this.getAttribute('cubicweb:value');

		    if (!values.contains(value)) {

			if (!jQuery(this).hasClass('facetValueDisabled')) {

			    jQuery(this).addClass('facetValueDisabled');

			}

		    } else {

			if (jQuery(this).hasClass('facetValueDisabled')) {

			    jQuery(this).removeClass('facetValueDisabled');

			}

		    }

		});

	    }

	});

    });

}

var SELECTED_IMG = baseuri()+"data/black-check.png";

var UNSELECTED_IMG = baseuri()+"data/no-check-no-border.png";

var UNSELECTED_BORDER_IMG = baseuri()+"data/black-uncheck.png";

function initFacetBoxEvents(root) {

    // facetargs : (divid, vid, paginate, extraargs)

    root = root || document;

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

	var form = jQuery(this);

	// NOTE: don't evaluate facetargs here but in callbacks since its value

	//       may changes and we must send its value when the callback is

	//       called, not when the page is initialized

	var facetargs = form.attr('cubicweb:facetargs');

	if (facetargs !== undefined) {

	    form.submit(function() {

	        buildRQL.apply(null, evalJSON(form.attr('cubicweb:facetargs')));

	        return false;

	    });

	    form.find('div.facet').each(function() {

		var facet = jQuery(this);

		facet.find('div.facetCheckBox').each(function (i) {

		    this.setAttribute('cubicweb:idx', i);

		});

		facet.find('div.facetCheckBox').click(function () {

		    var $this = jQuery(this);

		    // NOTE : add test on the facet operator (i.e. OR, AND)

		    // if ($this.hasClass('facetValueDisabled')){

		    //  	    return

		    // }

		    if ($this.hasClass('facetValueSelected')) {

			$this.removeClass('facetValueSelected');

			$this.find('img').each(function (i){

			if (this.getAttribute('cubicweb:unselimg')){

			       this.setAttribute('src', UNSELECTED_BORDER_IMG);

			       this.setAttribute('alt', (_('not selected')));

			    }

			    else{

			       this.setAttribute('src', UNSELECTED_IMG);

			       this.setAttribute('alt', (_('not selected')));

			    }

			});

			var index = parseInt($this.attr('cubicweb:idx'));

			// we dont need to move the element when cubicweb:idx == 0

			if (index > 0){

			    var shift = jQuery.grep(facet.find('.facetValueSelected'), function (n) {

				    var nindex = parseInt(n.getAttribute('cubicweb:idx'));

				    return nindex > index;

				}).length;

			    index += shift;

			    var parent = this.parentNode;

			    var $insertAfter = jQuery(parent).find('.facetCheckBox:nth('+index+')');

			    if ( ! ($insertAfter.length == 1 && shift == 0) ) {

				// only rearrange element if necessary

				$insertAfter.after(this);

			    }

			}

		    } else {

			var lastSelected = facet.find('.facetValueSelected:last');

			if (lastSelected.length) {

			    lastSelected.after(this);

			} else {

			    var parent = this.parentNode;

			    jQuery(parent).prepend(this);

			}

			jQuery(this).addClass('facetValueSelected');

			var $img = jQuery(this).find('img');

			$img.attr('src', SELECTED_IMG).attr('alt', (_('selected')));

		    }

		    buildRQL.apply(null, evalJSON(form.attr('cubicweb:facetargs')));

		    facet.find('.facetBody').animate({scrollTop: 0}, '');

		});

		facet.find('select.facetOperator').change(function() {

		    var nbselected = facet.find('div.facetValueSelected').length;

		    if (nbselected >= 2) {

			buildRQL.apply(null, evalJSON(form.attr('cubicweb:facetargs')));

		    }

		});

		facet.find('div.facetTitle').click(function() {

		  facet.find('div.facetBody').toggleClass('hidden').toggleClass('opened');

		  jQuery(this).toggleClass('opened');

		   });

	    });

	}

    });

}

// trigger this function on document ready event if you provide some kind of

// persistent search (eg crih)

function reorderFacetsItems(root){

    root = root || document;

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

	var form = jQuery(this);

	if (form.attr('cubicweb:facetargs')) {

	    form.find('div.facet').each(function() {

		var facet = jQuery(this);

		var lastSelected = null;

		facet.find('div.facetCheckBox').each(function (i) {

		    var $this = jQuery(this);

		    if ($this.hasClass('facetValueSelected')) {

			if (lastSelected) {

			    lastSelected.after(this);

			} else {

			    var parent = this.parentNode;

			    jQuery(parent).prepend(this);

			}

			lastSelected = $this;

		    }

		});

	    });

	}

    });

}

// we need to differenciate cases where initFacetBoxEvents is called

// with one argument or without any argument. If we use `initFacetBoxEvents`

// as the direct callback on the jQuery.ready event, jQuery will pass some argument

// of his, so we use this small anonymous function instead.

jQuery(document).ready(function() {initFacetBoxEvents();});

CubicWeb.provide('facets.js');