/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements.  See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*
* $Id: file 64488 2006-03-10 17:32:09Z paulo $
*/

mindplot.DesignerActionRunner = new Class({
    execute:function(command)
    {
        core.assert(command, "command can not be null");
        // Execute action ...
        command.execute(this._context);

        // Enqueue it ...
        this._undoManager.enqueue(command);

        // Fire event
        var event = this._undoManager._buildEvent();
        this._designer._fireEvent("change", event);
    },
    initialize: function(designer)
    {
        this._designer = designer;
        this._undoManager = new mindplot.DesignerUndoManager();
        this._context = new mindplot.CommandContext(this._designer);
    },
    undo: function()
    {
        this._undoManager.execUndo(this._context);

        // Fire event
        var event = this._undoManager._buildEvent();
        this._designer._fireEvent("change", event);
    },
    redo: function()
    {
        this._undoManager.execRedo(this._context);

        // Fire event
        var event = this._undoManager._buildEvent();
        this._designer._fireEvent("change", event);

    },
    markAsChangeBase: function()
    {
        return this._undoManager.markAsChangeBase();
    },
    hasBeenChanged: function()
    {
        return this._undoManager.hasBeenChanged();
    }
});

mindplot.CommandContext = new Class({
    initialize: function(designer)
    {
        this._designer = designer;
    },
    findTopics:function(topicsIds)
    {
        var designerTopics = this._designer._topics;
        if (!(topicsIds instanceof Array))
        {
            topicsIds = [topicsIds];
        }

        var result = designerTopics.filter(function(topic) {
            var found = false;
            if (topic != null)
            {
                var topicId = topic.getId();
                found = topicsIds.contains(topicId);
            }
            return found;

        });
        return result;
    },
    deleteTopic:function(topic)
    {
        this._designer._removeNode(topic);
    },
    createTopic:function(model)
    {
        core.assert(model, "model can not be null");
        var topic = this._designer._nodeModelToNodeGraph(model);

        // @todo: Is this required ?
        var designer = this._designer;
        designer.onNodeFocusEvent.attempt(topic, designer);

        return topic;
    },
    createModel:function()
    {
        var mindmap = this._designer.getMindmap();
        var model = mindmap.createNode(mindplot.NodeModel.MAIN_TOPIC_TYPE);
        return model;
    },
    connect:function(childTopic, parentTopic)
    {
        childTopic.connectTo(parentTopic, this._designer._workspace);
    } ,
    disconnect:function(topic)
    {
        topic.disconnect(this._designer._workspace);
    }
});

mindplot.DesignerActionRunner.setInstance = function(actionRunner)
{
    mindplot.DesignerActionRunner._instance = actionRunner;
};

mindplot.DesignerActionRunner.getInstance = function()
{
    return mindplot.DesignerActionRunner._instance;
};