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/*
 * Copyright 2016 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.dashbuilder.client.navigation.widget;

import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

import com.google.gwt.dom.client.AnchorElement;
import com.google.gwt.dom.client.Document;
import com.google.gwt.dom.client.Element;
import com.google.gwt.dom.client.LIElement;
import com.google.gwt.dom.client.Style;
import com.google.gwt.user.client.Event;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.IsWidget;
import org.dashbuilder.client.navigation.resources.i18n.NavigationConstants;
import org.jboss.errai.common.client.dom.DOMUtil;
import org.jboss.errai.common.client.dom.HTMLElement;
import org.jboss.errai.common.client.dom.Node;
import org.uberfire.mvp.Command;

public abstract class BaseNavWidgetView extends Composite implements NavWidgetView {

    protected Node navWidget = null;
    protected Element selectedItem = null;
    protected Map itemMap = new HashMap<>();
    protected Set widgetSet = new HashSet<>();

    protected void appendWidgetToElement(HTMLElement element, IsWidget widget) {
        DOMUtil.appendWidgetToElement(element, widget);
        widgetSet.add(widget);
    }

    @Override
    public void clearItems() {
        DOMUtil.removeAllChildren(navWidget);
        widgetSet.forEach(DOMUtil::removeFromParent);
    }

    @Override
    public void addGroupItem(String id, String name, String description, IsWidget widget) {
        Element el = widget.asWidget().getElement();
        navWidget.appendChild((Node) el);
    }

    @Override
    public void addItem(String id, String name, String description, Command onItemSelected) {
        AnchorElement anchor = Document.get().createAnchorElement();
        anchor.setInnerText(name);
        if (description != null && !description.equals(name)) {
            anchor.setTitle(description);
        }

        LIElement li = Document.get().createLIElement();
        li.getStyle().setCursor(Style.Cursor.POINTER);
        li.appendChild(anchor);
        navWidget.appendChild((Node) li);
        itemMap.put(id, li);

        Event.sinkEvents(anchor, Event.ONCLICK);
        Event.setEventListener(anchor, event -> {
            if (Event.ONCLICK == event.getTypeInt()) {
                onItemSelected.execute();
            }
        });
    }

    @Override
    public void setSelectedItem(String id) {
        Element el = itemMap.get(id);
        if (el != null) {
            clearSelectedItem();
            selectedItem = el;
            setSelectedEnabled(true);
        }
    }

    @Override
    public void clearSelectedItem() {
        if (selectedItem != null) {
            setSelectedEnabled(false);
            selectedItem = null;
        }
    }

    protected void setSelectedEnabled(boolean enabled) {
        if (enabled) {
            selectedItem.setClassName("active");
        } else {
            selectedItem.setClassName("");
        }
    }

    @Override
    public void errorNavGroupNotFound() {
        addItem("error", NavigationConstants.INSTANCE.navGroupNotFound(), null, () -> {});
    }

    @Override
    public void errorNavItemsEmpty() {
        addItem("error", NavigationConstants.INSTANCE.navItemsEmpty(), null, () -> {});
    }

    // LayoutRecursionIssueI18n

    public String navRefPerspectiveI18n(String name) {
        return NavigationConstants.INSTANCE.navRefPerspective(name);
    }

    public String navRefPerspectiveFoundI18n(String name) {
        return NavigationConstants.INSTANCE.navRefPerspectiveFound(name);
    }

    public String navRefPerspectiveDefaultI18n(String name) {
        return NavigationConstants.INSTANCE.navRefPerspectiveDefault(name);
    }

    public String navRefPerspectiveInGroupI18n(String name) {
        return NavigationConstants.INSTANCE.navRefPerspectiveInGroup(name);
    }

    public String navRefComponentI18n(String name) {
        return NavigationConstants.INSTANCE.navRefComponent(name);
    }

    public String navRefGroupDefinedI18n(String name) {
        return NavigationConstants.INSTANCE.navRefGroupDefined(name);
    }

    public String navRefGroupContextI18n(String name) {
        return NavigationConstants.INSTANCE.navRefGroupContext(name);
    }

    public String navRefDefaultItemDefinedI18n(String name) {
        return NavigationConstants.INSTANCE.navRefDefaultItemDefined(name);
    }

    public String navRefDefaultItemFoundI18n(String name) {
        return NavigationConstants.INSTANCE.navRefDefaultItemFound(name);
    }

    public String navRefPerspectiveRecursionEndI18n() {
        return NavigationConstants.INSTANCE.navRefPerspectiveRecursionEnd();
    }

    public String navMenubarDragComponentI18n() {
        return NavigationConstants.INSTANCE.navMenubarDragComponent();
    }

    public String navTreeDragComponentI18n() {
        return NavigationConstants.INSTANCE.navTreeDragComponent();
    }

    public String navTilesDragComponentI18n() {
        return NavigationConstants.INSTANCE.navTilesDragComponent();
    }

    public String navTabListDragComponentI18n() {
        return NavigationConstants.INSTANCE.navTabListDragComponent();
    }

    public String navCarouselDragComponentI18n() {
        return NavigationConstants.INSTANCE.navCarouselDragComponent();
    }
}