/*
*    Copyright [2011] [wisemapping]
*
*   Licensed under WiseMapping Public License, Version 1.0 (the "License").
*   It is basically the Apache License, Version 2.0 (the "License") plus the
*   "powered by wisemapping" text requirement on every single page;
*   you may not use this file except in compliance with the License.
*   You may obtain a copy of the license at
*
*       http://www.wisemapping.org/license
*
*   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.
*/

mindplot.commands.DragTopicCommand = mindplot.Command.extend(
{
    initialize: function(topicId)
    {
        core.assert(topicId, "topicId must be defined");
        this._selectedObjectsIds = topicId;
        this._parentTopic = null;
        this._position = null;
        this._order = null;
        this._id = mindplot.Command._nextUUID();
    },
    execute: function(commandContext)
    {

        var topic = commandContext.findTopics([this._selectedObjectsIds])[0];

        // Save old position ...
        var origParentTopic = topic.getOutgoingConnectedTopic();
        var origOrder = null;
        var origPosition = null;
        if (topic.getType() == mindplot.NodeModel.MAIN_TOPIC_TYPE && origParentTopic != null && origParentTopic.getType() == mindplot.NodeModel.MAIN_TOPIC_TYPE)
        {
            // In this case, topics are positioned using order ...
            origOrder = topic.getOrder();
        } else
        {
            origPosition = topic.getPosition().clone();
        }

        // Disconnect topic ..
        if (origParentTopic)
        {
            commandContext.disconnect(topic);
        }


        // Set topic position ...
        if (this._position != null)
        {
            // Set position ...
            topic.setPosition(this._position);

        } else if (this._order != null)
        {
            topic.setOrder(this._order);
        } else
        {
            core.assert("Illegal commnad state exception.");
        }
        this._order = origOrder;
        this._position = origPosition;

        // Finally, connect topic ...
        if (this._parentId)
        {
            var parentTopic = commandContext.findTopics([this._parentId])[0];
            commandContext.connect(topic, parentTopic);
        }

        // Backup old parent id ...
        this._parentId = null;
        if (origParentTopic)
        {
            this._parentId = origParentTopic.getId();
        }

    },
    undoExecute: function(commandContext)
    {
        this.execute(commandContext);
        var selectedRelationships = commandContext.getSelectedRelationshipLines();
        selectedRelationships.forEach(function(relationshipLine,index){
            relationshipLine.redraw();
        });

    },
    setPosition: function(point)
    {
        this._position = point;
    },
    setParetTopic: function(topic) {
        this._parentId = topic.getId();

    },
    setOrder: function(order)
    {
        this._order = order
    }
});