/*
 * Copyright 2000-2018 Vaadin Ltd.
 *
 * 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 com.vaadin.contextmenu;

import com.vaadin.contextmenu.ContextMenu.ContextMenuOpenListener.ContextMenuOpenEvent;
import com.vaadin.contextmenu.GridContextMenu.GridContextMenuOpenListener.GridContextMenuOpenEvent;
import com.vaadin.shared.ui.grid.GridConstants.Section;
import com.vaadin.ui.Grid;
import com.vaadin.ui.Grid.Column;
import com.vaadin.ui.Grid.GridContextClickEvent;

@SuppressWarnings("serial")
public class GridContextMenu<T> extends ContextMenu {

    public GridContextMenu(Grid<T> parentComponent) {
        super(parentComponent, true);
    }

    private void addGridSectionContextMenuListener(final Section section,
            final GridContextMenuOpenListener<T> listener) {
        addContextMenuOpenListener((final ContextMenuOpenEvent event) -> {
            if (event
                    .getContextClickEvent() instanceof Grid.GridContextClickEvent) {
                @SuppressWarnings("unchecked")
                GridContextClickEvent<T> gridEvent = (GridContextClickEvent<T>) event
                        .getContextClickEvent();
                if (gridEvent.getSection() == section) {
                    listener.onContextMenuOpen(new GridContextMenuOpenEvent<>(
                            GridContextMenu.this, gridEvent));
                }
            }
        });
    }

    public void addGridHeaderContextMenuListener(
            GridContextMenuOpenListener<T> listener) {
        addGridSectionContextMenuListener(Section.HEADER, listener);
    }

    public void addGridFooterContextMenuListener(
            GridContextMenuOpenListener<T> listener) {
        addGridSectionContextMenuListener(Section.FOOTER, listener);
    }

    public void addGridBodyContextMenuListener(
            GridContextMenuOpenListener<T> listener) {
        addGridSectionContextMenuListener(Section.BODY, listener);
    }

    public interface GridContextMenuOpenListener<T>
            extends java.util.EventListener, java.io.Serializable {

        public void onContextMenuOpen(GridContextMenuOpenEvent<T> event);

        public static class GridContextMenuOpenEvent<T>
                extends ContextMenuOpenEvent {

            private final T item;
            private final Grid<T> component;
            private final int rowIndex;
            private final Column<T, ?> column;
            private final Section section;

            public GridContextMenuOpenEvent(ContextMenu contextMenu,
                    GridContextClickEvent<T> contextClickEvent) {
                super(contextMenu, contextClickEvent);
                item = contextClickEvent.getItem();
                component = contextClickEvent.getComponent();
                rowIndex = contextClickEvent.getRowIndex();
                column = contextClickEvent.getColumn();
                section = contextClickEvent.getSection();
            }

            public T getItem() {
                return item;
            }

            public Grid<T> getComponent() {
                return component;
            }

            public int getRowIndex() {
                return rowIndex;
            }

            public Column<T, ?> getColumn() {
                return column;
            }

            public Section getSection() {
                return section;
            }
        }
    }
}