"use strict";

/*
Copyright [2014] [Diagramo]

Licensed 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.
*/

/* 
 * This is triggered when you delete a figure
 * @this {FigureDeleteCommand} 
 * @constructor
 * @author Alex Gheorghiu <alex@scriptoid.com>
 */
function FigureDeleteCommand(figureId){
    this.oType = 'FigureDeleteCommand';
    
    /**Any sequence of many mergeable actions can be packed by the history*/
    this.mergeable = false;
    
    this.figureId = figureId;
    
    this.deletedFigure = null;

    this.deletedGlues = null;
    this.deletedCPs = null;
        
    this.firstExecute = true;
}


FigureDeleteCommand.prototype = {

    /**This method got called every time the Command must execute*/
    execute: function () {
        if (this.firstExecute) {
            //store deleted figure (safe copy)
            //            this.deletedFigure = STACK.figureGetById(this.figureId).clone();
            this.deletedFigure = STACK.figureGetById(this.figureId);

            //store deleted ConnectionPoints of target figure (safe copy)
            this.deletedCPs = CONNECTOR_MANAGER.connectionPointGetAllByParent(this.figureId);

            //store deleted Glues of all ConnectionPoints of target figure (safe copy)
            this.deletedGlues = [];

            var cpLength = this.deletedCPs.length;
            for (var k = 0; k < cpLength; k++) {
                var glues = CONNECTOR_MANAGER.glueGetByFirstConnectionPointId(this.deletedCPs[k].id);
                if (glues.length) {
                    this.deletedGlues.push(glues[0]);
                }
            }

            //delete it
            STACK.figureRemoveById(this.figureId);

            //remove clues
            //TODO: implements

            //remove connectors
            //TODO: implement

            //interface settings            
            selectedFigureId = -1;
            setUpEditPanel(canvasProps);
            state = STATE_NONE;

            this.firstExecute = false;
        }
        else { //a redo
            throw "Not implemented";
        }
    },

    //      Snippet from old delete action (in main)
    //                    if(selectedFigureId > -1){
    //                        //remove figure
    //
    //                        if(!ev.noAddUndo && doUndo){//only add an action, if we are not currently undo/redoing an action
    //                            var undo = new DeleteCommand(selectedFigureId, History.OBJECT_FIGURE, null, STACK.figureGetById(selectedFigureId),ev)
    //
    //                            History.addUndo(undo);
    //                        }
    //                        
    //                        STACK.figureRemoveById(selectedFigureId);
    //                        
    //                        
    //                        //remove glues
    //                        var xCPs = CONNECTOR_MANAGER.connectionPointGetAllByParent(selectedFigureId);
    //                        for(var k=0; k<xCPs.length; k++){
    //                            CONNECTOR_MANAGER.glueRemoveAllByFirstId(xCPs[k].id);
    //                            
    //                        }
    //                        
    //                        //remove connection points
    //                        CONNECTOR_MANAGER.connectionPointRemoveAllByParent(selectedFigureId);
    //                        selectedFigureId = -1;
    //                        setUpEditPanel(canvasProps);
    //                        state = STATE_NONE;
    //                        redraw = true;
    //                        
    //                    //                        alert('Delete done');
    //                    }

    /**This method should be called every time the Command should be undone*/
    undo: function () {
        if (this.deletedFigure) {
            //add deleted ConnectionPoints back
            var length = this.deletedCPs.length;
            for (var i = 0; i < length; i++) {
                CONNECTOR_MANAGER.connectionPointAdd(this.deletedCPs[i]);
            }

            //add deleted Glues back
            length = this.deletedGlues.length;
            for (var j = 0; j < length; j++) {
                CONNECTOR_MANAGER.glueAdd(this.deletedGlues[j]);
            }

            //add deleted figure back
            //            STACK.figureAdd(this.deletedFigure.clone());  //safe copy
            STACK.figureAdd(this.deletedFigure);
        }
        else {
            throw "No soted deleted figure";
        }
    }
}