/*
 *
 * (c) Copyright Ascensio System Limited 2010-2017
 *
 * This program is a free software product. You can redistribute it and/or
 * modify it under the terms of the GNU Affero General Public License (AGPL)
 * version 3 as published by the Free Software Foundation. In accordance with
 * Section 7(a) of the GNU AGPL its Section 15 shall be amended to the effect
 * that Ascensio System SIA expressly excludes the warranty of non-infringement
 * of any third-party rights.
 *
 * This program is distributed WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR  PURPOSE. For
 * details, see the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
 *
 * You can contact Ascensio System SIA at Lubanas st. 125a-25, Riga, Latvia,
 * EU, LV-1021.
 *
 * The  interactive user interfaces in modified source and object code versions
 * of the Program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU AGPL version 3.
 *
 * Pursuant to Section 7(b) of the License you must retain the original Product
 * logo when distributing the program. Pursuant to Section 7(e) we decline to
 * grant you any rights under trademark law for use of our trademarks.
 *
 * All the Product's GUI elements, including illustrations and icon sets, as
 * well as technical writing content are licensed under the terms of the
 * Creative Commons Attribution-ShareAlike 4.0 International. See the License
 * terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
 *
*/

if (Common === undefined) {
    var Common = {};
}

    Common.Gateway = new(function() {
        var me = this,
            $me = $(me);

        var commandMap = {
            'init': function(data) {
                $me.trigger('init', data);
            },

            'openDocument': function(data) {
                $me.trigger('opendocument', data);
            },

            'showMessage': function(data) {
                $me.trigger('showmessage', data);
            },

            'applyEditRights': function(data) {
                $me.trigger('applyeditrights', data);
            },

            'processSaveResult': function(data) {
                $me.trigger('processsaveresult', data);
            },

            'processRightsChange': function(data) {
                $me.trigger('processrightschange', data);
            },

            'refreshHistory': function(data) {
                $me.trigger('refreshhistory', data);
            },

            'setHistoryData': function(data) {
                $me.trigger('sethistorydata', data);
            },

            'setEmailAddresses': function(data) {
                $me.trigger('setemailaddresses', data);
            },

            'processMailMerge': function(data) {
                $me.trigger('processmailmerge', data);
            },

            'downloadAs': function(data) {
                $me.trigger('downloadas', data);
            },

            'processMouse': function(data) {
                $me.trigger('processmouse', data);
            },

            'internalCommand': function(data) {
                $me.trigger('internalcommand', data);
            },

            'resetFocus': function(data) {
                $me.trigger('resetfocus', data);
            }
        };

        var _postMessage = function(msg) {
            // TODO: specify explicit origin
            if (window.parent && window.JSON) {
                msg.frameEditorId = window.frameEditorId;
                window.parent.postMessage(window.JSON.stringify(msg), "*");
            }
        };

        var _onMessage = function(msg) {
            // TODO: check message origin
            var data = msg.data;
            if (Object.prototype.toString.apply(data) !== '[object String]' || !window.JSON) {
                return;
            }

            var cmd, handler;

            try {
                cmd = window.JSON.parse(data)
            } catch(e) {
                cmd = '';
            }

            if (cmd) {
                handler = commandMap[cmd.command];
                if (handler) {
                    handler.call(this, cmd.data);
                }
            }
        };

        var fn = function(e) { _onMessage(e); };

        if (window.attachEvent) {
            window.attachEvent('onmessage', fn);
        } else {
            window.addEventListener('message', fn, false);
        }

        return {

            appReady: function() {
                _postMessage({ event: 'onAppReady' });
            },

            requestEditRights: function() {
                _postMessage({ event: 'onRequestEditRights' });
            },

            requestHistory: function() {
                _postMessage({ event: 'onRequestHistory' });
            },

            requestHistoryData: function(revision) {
                _postMessage({
                    event: 'onRequestHistoryData',
                    data: revision
                });
            },

            requestRestore: function(version, url) {
                _postMessage({
                    event: 'onRequestRestore',
                    data: {
                        version: version,
                        url: url
                    }
                });
            },

            requestEmailAddresses: function() {
                _postMessage({ event: 'onRequestEmailAddresses' });
            },

            requestStartMailMerge: function() {
                _postMessage({event: 'onRequestStartMailMerge'});
            },

            requestHistoryClose: function(revision) {
                _postMessage({event: 'onRequestHistoryClose'});
            },

            reportError: function(code, description) {
                _postMessage({
                    event: 'onError',
                    data: {
                        errorCode: code,
                        errorDescription: description
                    }
                });
            },

            reportWarning: function(code, description) {
                _postMessage({
                    event: 'onWarning',
                    data: {
                        warningCode: code,
                        warningDescription: description
                    }
                });
            },

            sendInfo: function(info) {
                _postMessage({
                    event: 'onInfo',
                    data: info
                });
            },

            setDocumentModified: function(modified) {
                _postMessage({
                    event: 'onDocumentStateChange',
                    data: modified
                });
            },

            internalMessage: function(type, data) {
                _postMessage({
                    event: 'onInternalMessage',
                    data: {
                        type: type,
                        data: data
                    }
                });
            },

            updateVersion: function() {
                _postMessage({ event: 'onOutdatedVersion' });
            },

            downloadAs: function(url) {
                _postMessage({
                    event: 'onDownloadAs',
                    data: url
                });
            },

            collaborativeChanges: function() {
                _postMessage({event: 'onCollaborativeChanges'});
            },

            requestRename: function(title) {
                _postMessage({event: 'onRequestRename', data: title});
            },

            metaChange: function(meta) {
                _postMessage({event: 'onMetaChange', data: meta});
            },

            documentReady: function() {
                _postMessage({ event: 'onDocumentReady' });
            },

            requestClose: function() {
                _postMessage({event: 'onRequestClose'});
            },

            on: function(event, handler){
                var localHandler = function(event, data){
                    handler.call(me, data)
                };

                $me.on(event, localHandler);
            }
        }

    })();
