/**
 * @license
 * Copyright (C) 2012-2013 KO GmbH <copyright@kogmbh.com>
 *
 * @licstart
 * The JavaScript code in this page is free software: you can redistribute it
 * and/or modify it under the terms of the GNU Affero General Public License
 * (GNU AGPL) as published by the Free Software Foundation, either version 3 of
 * the License, or (at your option) any later version.  The code is distributed
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU AGPL for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this code.  If not, see <http://www.gnu.org/licenses/>.
 *
 * As additional permission under GNU AGPL version 3 section 7, you
 * may distribute non-source (e.g., minimized or compacted) forms of
 * that code without the copy of the GNU GPL normally required by
 * section 4, provided you include this license notice and a URL
 * through which recipients can access the Corresponding Source.
 *
 * As a special exception to the AGPL, any HTML file which merely makes function
 * calls to this code, and for that purpose includes it by reference shall be
 * deemed a separate work for copyright law purposes. In addition, the copyright
 * holders of this code give you permission to combine this code with free
 * software libraries that are released under the GNU LGPL. You may copy and
 * distribute such a system following the terms of the GNU AGPL for this code
 * and the LGPL for the libraries. If you modify this code, you may extend this
 * exception to your version of the code, but you are not obligated to do so.
 * If you do not wish to do so, delete this exception statement from your
 * version.
 *
 * This license applies to this entire compilation.
 * @licend
 * @source: http://www.webodf.org/
 * @source: https://github.com/kogmbh/WebODF/
 */

/*global define, require */

define("webodf/editor/widgets/toolbarWidgets/currentStyle",
       ["webodf/editor/EditorSession"],

  function (EditorSession) {
    "use strict";

    return function CurrentStyle(callback) {
        var self = this,
            editorSession,
            paragraphStyles;

        function selectParagraphStyle(info) {
            if (paragraphStyles) {
                if (info.type === 'style') {
                    paragraphStyles.setValue(info.styleName);
                }
            }
        }

        function setParagraphStyle() {
            if (editorSession) {
                editorSession.setCurrentParagraphStyle(paragraphStyles.value());
            }
            self.onToolDone();
        }

        function makeWidget(callback) {
            require(["webodf/editor/widgets/paragraphStyles"], function (ParagraphStyles) {
                var p;

                p = new ParagraphStyles(function (pStyles) {
                    paragraphStyles = pStyles;

                    paragraphStyles.widget().onChange = setParagraphStyle;

                    paragraphStyles.setEditorSession(editorSession);
                    return callback(paragraphStyles.widget());
                });
            });
        }

        this.setEditorSession = function(session) {
            if (editorSession) {
                editorSession.unsubscribe(EditorSession.signalParagraphChanged, selectParagraphStyle);
            }
            editorSession = session;
            if (paragraphStyles) {
                paragraphStyles.setEditorSession(editorSession);
            }
            if (editorSession) {
                editorSession.subscribe(EditorSession.signalParagraphChanged, selectParagraphStyle);
                // TODO: selectParagraphStyle(editorSession.getCurrentParagraphStyle());
            }
        };

        this.onToolDone = function () {};

        makeWidget(function (widget) {
            return callback(widget);
        });
    };
});
