var Tabs = function(obj) {
    obj._$tabsPanel = $(obj.id + " .tabs-panel");
    obj._$tabs = $(obj.id + " .tabs");

    this.obj = obj;

    this._init(obj);
};

$.extend(Tabs.prototype, {
    _init: function(obj) {
        var _that = this;

        obj._$tabs.on("click", "div", function(event) {
            var id = $(this).data("index");
            _that.setCurrent(id);
            obj.clickAfter(id);
        });

        obj._$tabs.on("click", ".ico-close", function(event) {
            var id = $(this).parent().data("index");
            _that.del(id);
            event.stopPropagation();
        });
    },
    add: function(data) {
        var $tabsPanel = this.obj._$tabsPanel,
                $tabs = this.obj._$tabs;

        this.obj._prevId = $tabs.children("div.current").data("index");

        $tabs.children("div").removeClass("current");
        $tabsPanel.children("div").hide();

        $tabs.append('<div class="current" data-index="' + data.id + '">'
                + data.title + '<span class="ico-close">X</span><div>');
        $tabsPanel.append('<div data-index="' + data.id + '">' + data.content
                + '</div>');
    },
    del: function(id) {
        var $tabsPanel = this.obj._$tabsPanel,
                $tabs = this.obj._$tabs,
                prevId = undefined,
                currentId = $tabs.children(".current").data("index");
        $tabs.children("div[data-index='" + id + "']").remove();
        $tabsPanel.children("div[data-index='" + id + "']").remove();

        if (this.obj._prevId === id) {
            this.obj._prevId = $tabs.children("div:first").data("index");
        }

        if (currentId !== id) {
            prevId = currentId;
        } else {
            prevId = this.obj._prevId;
            this.setCurrent(prevId);
        }

        this.obj.removeAfter(id, prevId);
    },
    getCurrentId: function() {
        var $tabs = this.obj._$tabs;
        return $tabs.children(".current").data("index");
    },
    setCurrent: function(id) {
        if (!id) {
            return false;
        }

        var $tabsPanel = this.obj._$tabsPanel,
                $tabs = this.obj._$tabs;

        var $currentTab = $tabs.children(".current");
        if ($currentTab.data("index") === id) {
            return false;
        }

        this.obj._prevId = $currentTab.data("index");

        $tabs.children("div").removeClass("current");
        $tabsPanel.children("div").hide();

        $tabs.children("div[data-index='" + id + "']").addClass("current");
        $tabsPanel.children("div[data-index='" + id + "']").show();
    }
});