modulejs.define('view/items', ['_', '$', 'core/settings', 'core/resource', 'core/format', 'core/event', 'core/location'], function (_, $, allsettings, resource, format, event, location) {

    var settings = _.extend({
            binaryPrefix: false,
            hideFolders: false,
            hideParentFolder: false,
            setParentFolderLabels: false
        }, allsettings.view),

        itemTemplate =
            '<li class="item">' +
                '<a>' +
                    '<span class="icon square"><img/></span>' +
                    '<span class="icon rational"><img/></span>' +
                    '<span class="label"/>' +
                    '<span class="date"/>' +
                    '<span class="size"/>' +
                '</a>' +
            '</li>',
        hintTemplate = '<span class="hint"/>',
        contentTemplate =
            '<div id="content">' +
                '<div id="view">' +
                    '<ul id="items" class="clearfix">' +
                        '<li class="header">' +
                            '<a class="icon"/>' +
                            '<a class="label" href="#"><span class="l10n-name"/></a>' +
                            '<a class="date" href="#"><span class="l10n-lastModified"/></a>' +
                            '<a class="size" href="#"><span class="l10n-size"/></a>' +
                        '</li>' +
                    '</ul>' +
                    '<div class="empty l10n-empty"/>' +
                '</div>' +
            '</div>',

        update = function (item, force) {

            if (!force && item.$view) {
                return item.$view;
            }

            var $html = $(itemTemplate),
                $a = $html.find('a'),
                $iconImg = $html.find('.icon img'),
                $label = $html.find('.label'),
                $date = $html.find('.date'),
                $size = $html.find('.size');

            $html
                .addClass(item.isFolder() ? 'folder' : 'file')
                .data('item', item);

            location.setLink($a, item);

            $iconImg.attr('src', resource.icon(item.type)).attr('alt', item.type);
            $label.text(item.label);
            $date.data('time', item.time).text(format.formatDate(item.time));
            $size.data('bytes', item.size).text(format.formatSize(item.size));

            if (item.isFolder() && !item.isManaged) {
                $html.addClass('page');
                $iconImg.attr('src', resource.icon('folder-page'));
            }

            if (item.isCurrentParentFolder()) {
                $iconImg.attr('src', resource.icon('folder-parent'));
                if (!settings.setParentFolderLabels) {
                    $label.addClass('l10n-parentDirectory');
                }
                $html.addClass('folder-parent');
            }

            if (item.$view) {
                item.$view.replaceWith($html);
            }
            item.$view = $html;

            return $html;
        },

        onMouseenter = function () {

            var item = $(this).closest('.item').data('item');
            event.pub('item.mouseenter', item);
        },

        onMouseleave = function () {

            var item = $(this).closest('.item').data('item');
            event.pub('item.mouseleave', item);
        },

        onLocationChanged = function (item) {

            var $items = $('#items'),
                $empty = $('#view').find('.empty');

            $items.find('.item').remove();

            if (item.parent && !settings.hideParentFolder) {
                $items.append(update(item.parent, true));
            }

            _.each(item.content, function (e) {

                if (!(e.isFolder() && settings.hideFolders)) {
                    $items.append(update(e, true));
                }
            });

            if (item.isEmpty()) {
                $empty.show();
            } else {
                $empty.hide();
            }

            $('html,body').scrollLeft(0).scrollTop(0);
        },

        onLocationRefreshed = function (item, added, removed) {

            var $items = $('#items'),
                $empty = $('#view').find('.empty');

            _.each(added, function (item) {

                if (!(item.isFolder() && settings.hideFolders)) {
                    update(item, true).hide().appendTo($items).fadeIn(400);
                }
            });

            _.each(removed, function (item) {

                item.$view.fadeOut(400, function () {
                    item.$view.remove();
                });
            });

            if (item.isEmpty()) {
                setTimeout(function () { $empty.show(); }, 400);
            } else {
                $empty.hide();
            }
        },

        init = function () {

            var $content = $(contentTemplate),
                $view = $content.find('#view'),
                $items = $view.find('#items'),
                $emtpy = $view.find('.empty').hide();

            format.setDefaultMetric(settings.binaryPrefix);

            $items
                .on('mouseenter', '.item a', onMouseenter)
                .on('mouseleave', '.item a', onMouseleave);

            event.sub('location.changed', onLocationChanged);
            event.sub('location.refreshed', onLocationRefreshed);

            $content.appendTo('body');
        };

    init();
});