/*
 * WBI Indicator Explorer
 *
 * Copyright 2015 Sebastian Nogara <snogaraleal@gmail.com>
 *
 * This file is part of WBI.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package client.ui;

import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.user.client.ui.DialogBox;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.TextArea;
import com.google.gwt.user.client.ui.VerticalPanel;

import client.managers.models.SeriesManager;
import client.ui.components.MaterialButton;

/**
 * {@code DialogBox} displaying content provided by a
 * {@link SeriesManager.Serializer}.
 */
public class SeriesSerializerDialogBox extends DialogBox {
    /**
     * Width of text area in characters.
     */
    private static final int TEXT_AREA_WIDTH = 80;

    /**
     * Height of text area in lines.
     */
    private static final int TEXT_AREA_HEIGHT = 24;

    /**
     * {@code TextArea} displaying serialized contents.
     */
    private TextArea textArea = new TextArea();

    /**
     * Select all button.
     */
    private MaterialButton selectAllButton =
        new MaterialButton("Select all", true);

    /**
     * Close button.
     */
    private MaterialButton closeButton =
        new MaterialButton("Close", true);

    /**
     * {@code HorizontalPanel} containing buttons.
     */
    private HorizontalPanel buttonsPanel = new HorizontalPanel();

    /**
     * {@code VerticalPanel} containing this {@code DialogBox} contents.
     */
    private VerticalPanel mainPanel = new VerticalPanel();

    /**
     * Initialize {@code SeriesSerializerDialogBox}.
     */
    public SeriesSerializerDialogBox() {
        super();

        setText("Serializer");
        setModal(true);
        setGlassEnabled(true);

        textArea.setCharacterWidth(TEXT_AREA_WIDTH);
        textArea.setVisibleLines(TEXT_AREA_HEIGHT);

        buttonsPanel.add(selectAllButton);
        buttonsPanel.add(closeButton);

        mainPanel.add(textArea);
        mainPanel.add(buttonsPanel);

        add(mainPanel);

        selectAllButton.addClickHandler(new ClickHandler() {
            @Override
            public void onClick(ClickEvent event) {
                textArea.selectAll();
                textArea.setFocus(true);
            }
        });

        closeButton.addClickHandler(new ClickHandler() {
            @Override
            public void onClick(ClickEvent event) {
                hide();
            }
        });
    }

    /**
     * Show dialog with fade in animation.
     */
    @Override
    public void center() {
        getElement().addClassName("fadein");
        super.center();
    }

    /**
     * Set the content of the displayed text area.
     *
     * @param content Text area content.
     */
    public void setContent(String content) {
        textArea.setText(content);
    }

    /**
     * {@code ClickHandler} implementation for showing a
     * {@link SeriesSerializerDialogBox}.
     */
    public static class OpenClickHandler implements ClickHandler {
        /**
         * {@code SeriesManager} to get series data from.
         */
        private SeriesManager manager;

        /**
         * {@code SeriesManager.Serializer} used to serialize series data.
         */
        private SeriesManager.Serializer serializer;

        /**
         * Initialize {@code OpenClickHandler}.
         *
         * @param manager {@code SeriesManager} to get series data from.
         * @param serializer {@code SeriesManager.Serializer} for serialization.
         */
        public OpenClickHandler(
                SeriesManager manager,
                SeriesManager.Serializer serializer) {

            this.manager = manager;
            this.serializer = serializer;
        }

        @Override
        public void onClick(ClickEvent event) {
            SeriesSerializerDialogBox dialogBox = new SeriesSerializerDialogBox();
            dialogBox.setContent(manager.serialize(serializer));
            dialogBox.center();
        }
    }
}