/**
 * Copyright 2015 ArcBees Inc.
 *
 * 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.arcbees.gaestudio.client.application.visualizer.columnfilter;

import javax.inject.Inject;

import com.arcbees.gquery.tooltip.client.Tooltip;
import com.arcbees.gquery.tooltip.client.TooltipOptions;
import com.arcbees.gquery.tooltip.client.TooltipResources;
import com.google.gwt.dom.client.Document;
import com.google.gwt.query.client.Function;
import com.google.gwt.query.client.GQuery;
import com.google.gwt.user.client.Event;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.IsWidget;

import static com.google.gwt.query.client.GQuery.$;

public class ColumnVisibilityTooltip {
    private static final String HIDE_DOM_EVENT = "mouseleave";

    private final TooltipResources tooltipResources;

    private Tooltip tooltip;

    @Inject
    ColumnVisibilityTooltip(
            TooltipResources tooltipResources) {
        this.tooltipResources = tooltipResources;
    }

    public void bind(GQuery anchor, String eventType, final IsWidget content) {
        $(Document.get()).click(new Function() {
            @Override
            public boolean f(Event e) {
                if (tooltip != null) {
                    if (isClickEventFromOutsideTooltip(e)) {
                        tooltip.hide();
                        $("." + tooltipResources.css().tooltip()).unbind(HIDE_DOM_EVENT);
                    }
                }

                return true;
            }
        });

        anchor.bind(eventType, new Function() {
            @Override
            public boolean f(Event e) {
                e.preventDefault();

                if (tooltip != null) {
                    tooltip.destroy();
                }

                int left = e.getClientX() - Window.getClientWidth() / 2;
                int top = e.getClientY() - Window.getClientHeight();

                TooltipOptions tooltipOptions = buildTooltipOptions(left, top, content);

                tooltip = $("body").as(Tooltip.Tooltip).tooltip(tooltipOptions);
                tooltip.show();

                bindAutoHide();

                return false;
            }
        });
    }

    private TooltipOptions buildTooltipOptions(int left, int top, IsWidget content) {
        TooltipOptions tooltipOptions = new TooltipOptions();

        tooltipOptions.withContent(content);
        tooltipOptions.withTrigger(TooltipOptions.TooltipTrigger.MANUAL);
        tooltipOptions.withPlacement(TooltipOptions.TooltipPlacement.BOTTOM);
        tooltipOptions.withOffset(new GQuery.Offset(left, top));

        return tooltipOptions;
    }

    private boolean isClickEventFromOutsideTooltip(Event e) {
        return $(e.getEventTarget()).closest("." + tooltipResources.css().tooltip()).length() == 0;
    }

    private void bindAutoHide() {
        $("." + tooltipResources.css().tooltip()).bind(HIDE_DOM_EVENT, new Function() {
            @Override
            public boolean f(Event e) {
                tooltip.hide();

                return true;
            }
        });
    }
}