/*
 * (c) Copyright Ascensio System SIA 2010-2015
 *
 * 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
 *
 */
 define(["core", "common/main/lib/collection/Users", "common/main/lib/collection/ChatMessages", "common/main/lib/view/Chat"], function () {
    Common.Controllers.Chat = Backbone.Controller.extend(_.extend({
        models: [],
        collections: ["Common.Collections.Users", "Common.Collections.ChatMessages"],
        views: ["Common.Views.Chat"],
        initialize: function () {
            this.addListeners({
                "Common.Views.Chat": {
                    "message:add": _.bind(this.onSendMessage, this)
                }
            });
        },
        events: {},
        onLaunch: function () {
            this.panelChat = this.createView("Common.Views.Chat", {
                storeUsers: this.getApplication().getCollection("Common.Collections.Users"),
                storeMessages: this.getApplication().getCollection("Common.Collections.ChatMessages")
            });
        },
        setMode: function (mode) {
            this.mode = mode;
            if (this.api) {
                if (this.mode.canCoAuthoring) {
                    this.api.asc_registerCallback("asc_onCoAuthoringChatReceiveMessage", _.bind(this.onReceiveMessage, this));
                }
                this.api.asc_registerCallback("asc_onAuthParticipantsChanged", _.bind(this.onUsersChanged, this));
                this.api.asc_registerCallback("asc_onConnectionStateChanged", _.bind(this.onUserConnection, this));
                this.api.asc_coAuthoringGetUsers();
                if (this.mode.canCoAuthoring) {
                    this.api.asc_coAuthoringChatGetMessages();
                }
            }
            return this;
        },
        setApi: function (api) {
            this.api = api;
            return this;
        },
        onUsersChanged: function (users) {
            if (!this.mode.canCoAuthoring) {
                var len = 0;
                for (name in users) {
                    if (undefined !== name) {
                        len++;
                    }
                }
                if (len > 2 && this._isCoAuthoringStopped == undefined) {
                    this._isCoAuthoringStopped = true;
                    this.api.asc_coAuthoringDisconnect();
                    Common.NotificationCenter.trigger("api:disconnect");
                    setTimeout(_.bind(function () {
                        Common.UI.alert({
                            closable: false,
                            title: this.notcriticalErrorTitle,
                            msg: this.textUserLimit,
                            iconCls: "warn",
                            buttons: ["ok"]
                        });
                    },
                    this), 100);
                    return;
                }
            }
            var usersStore = this.getApplication().getCollection("Common.Collections.Users");
            if (usersStore) {
                var arrUsers = [],
                name,
                user;
                for (name in users) {
                    if (undefined !== name) {
                        user = users[name];
                        if (user) {
                            arrUsers.push(new Common.Models.User({
                                id: user.asc_getId(),
                                username: user.asc_getUserName(),
                                online: true,
                                color: user.asc_getColor()
                            }));
                        }
                    }
                }
                usersStore[usersStore.size() > 0 ? "add" : "reset"](arrUsers);
            }
        },
        onUserConnection: function (change) {
            var usersStore = this.getApplication().getCollection("Common.Collections.Users");
            if (usersStore) {
                var user = usersStore.findUser(change.asc_getId());
                if (!user) {
                    usersStore.add(new Common.Models.User({
                        id: change.asc_getId(),
                        username: change.asc_getUserName(),
                        online: change.asc_getState(),
                        color: change.asc_getColor()
                    }));
                } else {
                    user.set({
                        online: change.asc_getState()
                    });
                }
            }
        },
        onReceiveMessage: function (messages) {
            var msgStore = this.getApplication().getCollection("Common.Collections.ChatMessages");
            if (msgStore) {
                var array = [];
                messages.forEach(function (msg) {
                    array.push(new Common.Models.ChatMessage({
                        userid: msg.user,
                        message: msg.message,
                        username: msg.username
                    }));
                });
                msgStore[msgStore.size() > 0 ? "add" : "reset"](array);
            }
        },
        onSendMessage: function (panel, text) {
            if (text.length > 0) {
                var splitString = function (string, chunkSize) {
                    var chunks = [];
                    while (string) {
                        if (string.length < chunkSize) {
                            chunks.push(string);
                            break;
                        } else {
                            chunks.push(string.substr(0, chunkSize));
                            string = string.substr(chunkSize);
                        }
                    }
                    return chunks;
                };
                var me = this;
                splitString(text, 2048).forEach(function (message) {
                    me.api.asc_coAuthoringChatSendMessage(message);
                });
            }
        },
        notcriticalErrorTitle: "Warning",
        textUserLimit: 'You are using ONLYOFFICE Editors free version.<br>Only two users can co-edit the document simultaneously.<br>Want more? Consider buying ONLYOFFICE Editors Pro version.<br><a href="http://www.onlyoffice.com" target="_blank">Read more</a>'
    },
    Common.Controllers.Chat || {}));
});