/*
*    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.RelationshipLine = function(sourceNode, targetNode, lineType)
{
    mindplot.ConnectionLine.call(this,sourceNode, targetNode, lineType);
    this._line2d.setIsSrcControlPointCustom(false);
    this._line2d.setIsDestControlPointCustom(false);
    this._isOnfocus = false;
    this._focusShape = this._createLine(this.getLineType(), mindplot.ConnectionLine.SIMPLE_CURVED);
    this._focusShape.setStroke(2, "solid", "#3f96ff");
    var ctrlPoints = this._line2d.getControlPoints();
    this._focusShape.setSrcControlPoint(ctrlPoints[0]);
    this._focusShape.setDestControlPoint(ctrlPoints[1]);
    this._focusShape.setVisibility(false);
    this._onFocus = false;
    this._isInWorkspace = false;
    this._controlPointsController = new mindplot.ControlPoint();

    var strokeColor = mindplot.RelationshipLine.getStrokeColor();
    this._startArrow = new web2d.Arrow();
    this._endArrow = new web2d.Arrow();
    this._startArrow.setStrokeColor(strokeColor);
    this._startArrow.setStrokeWidth(2);
    this._endArrow.setStrokeColor(strokeColor);
    this._endArrow.setStrokeWidth(2);
    this._line2d.setStroke(1, 'solid', strokeColor);

};

objects.extend(mindplot.RelationshipLine, mindplot.ConnectionLine);

mindplot.RelationshipLine.getStrokeColor = function()
{
    return '#9b74e6';
};

mindplot.RelationshipLine.prototype.setStroke = function(color, style, opacity)
{
    mindplot.RelationshipLine.superClass.setStroke.call(this, color, style, opacity);
    this._startArrow.setStrokeColor(color);
};

mindplot.RelationshipLine.prototype.redraw = function()
{
    var line2d = this._line2d;
    var sourceTopic = this._sourceTopic;
    var sourcePosition = sourceTopic.getPosition();

    var targetTopic = this._targetTopic;
    var targetPosition = targetTopic.getPosition();

    var sPos,tPos;
    this._line2d.setStroke(2);
    var ctrlPoints = this._line2d.getControlPoints();
    if(!core.Utils.isDefined(ctrlPoints[0].x) || !core.Utils.isDefined(ctrlPoints[1].x)){
        var defaultPoints = core.Utils.calculateDefaultControlPoints(sourcePosition, targetPosition);
        ctrlPoints[0].x=defaultPoints[0].x;
        ctrlPoints[0].y=defaultPoints[0].y;
        ctrlPoints[1].x=defaultPoints[1].x;
        ctrlPoints[1].y=defaultPoints[1].y;
    }
    var spoint = new core.Point();
    spoint.x=parseInt(ctrlPoints[0].x)+parseInt(sourcePosition.x);
    spoint.y=parseInt(ctrlPoints[0].y)+parseInt(sourcePosition.y);
    var tpoint = new core.Point();
    tpoint.x=parseInt(ctrlPoints[1].x)+parseInt(targetPosition.x);
    tpoint.y=parseInt(ctrlPoints[1].y)+parseInt(targetPosition.y);
    sPos = core.Utils.calculateRelationShipPointCoordinates(sourceTopic,spoint);
    tPos = core.Utils.calculateRelationShipPointCoordinates(targetTopic,tpoint);

    line2d.setFrom(sPos.x, sPos.y);
    line2d.setTo(tPos.x, tPos.y);

    line2d.moveToFront();

    //Positionate Arrows
    this._positionateArrows();

    // Add connector ...
    this._positionateConnector(targetTopic);

    if(this.isOnFocus()){
        this._refreshSelectedShape();
    }
    this._focusShape.moveToBack();
    this._controlPointsController.redraw();
};

mindplot.RelationshipLine.prototype._positionateArrows = function()
{
    this._endArrow.setVisibility(this.isVisible() && this._showEndArrow);
    this._startArrow.setVisibility(this.isVisible() && this._showStartArrow);

    var tpos = this._line2d.getTo();
    this._endArrow.setFrom(tpos.x, tpos.y);
    var spos = this._line2d.getFrom();
    this._startArrow.setFrom(spos.x, spos.y);
    this._endArrow.moveToBack();
    this._startArrow.moveToBack();

    if(this._line2d.getType() == "CurvedLine"){
        var controlPoints = this._line2d.getControlPoints();
        this._startArrow.setControlPoint(controlPoints[0]);
        this._endArrow.setControlPoint(controlPoints[1]);
    } else {
        this._startArrow.setControlPoint(this._line2d.getTo());
        this._endArrow.setControlPoint(this._line2d.getFrom());
    }
};

mindplot.RelationshipLine.prototype.addToWorkspace = function(workspace)
{
    workspace.appendChild(this._focusShape);
    workspace.appendChild(this._controlPointsController);
    this._controlPointControllerListener =this._initializeControlPointController.bindWithEvent(this,workspace);
    this._line2d.addEventListener('click', this._controlPointControllerListener);
    this._isInWorkspace = true;

    workspace.appendChild(this._startArrow);
    workspace.appendChild(this._endArrow);

    mindplot.RelationshipLine.superClass.addToWorkspace.call(this, workspace);
};

mindplot.RelationshipLine.prototype._initializeControlPointController = function(event,workspace){
        this.setOnFocus(true);
};

mindplot.RelationshipLine.prototype.removeFromWorkspace = function(workspace){
    workspace.removeChild(this._focusShape);
    workspace.removeChild(this._controlPointsController);
    this._line2d.removeEventListener('click',this._controlPointControllerListener);
    this._isInWorkspace = false;
    workspace.removeChild(this._startArrow);
    workspace.removeChild(this._endArrow);
    
    mindplot.RelationshipLine.superClass.removeFromWorkspace.call(this,workspace);
};

mindplot.RelationshipLine.prototype.getType = function(){
    return mindplot.RelationshipLine.type;
};

mindplot.RelationshipLine.prototype.setOnFocus = function(focus){
    // Change focus shape
    if(focus){
        this._refreshSelectedShape();
        this._controlPointsController.setLine(this);
    }
    this._focusShape.setVisibility(focus);

    this._controlPointsController.setVisibility(focus);
    this._onFocus = focus;
};

mindplot.RelationshipLine.prototype._refreshSelectedShape = function () {
    var sPos = this._line2d.getFrom();
    var tPos = this._line2d.getTo();
    var ctrlPoints = this._line2d.getControlPoints();
    this._focusShape.setFrom(sPos.x, sPos.y);
    this._focusShape.setTo(tPos.x, tPos.y);
    var shapeCtrlPoints = this._focusShape.getControlPoints();
    shapeCtrlPoints[0].x = ctrlPoints[0].x;
    shapeCtrlPoints[0].y = ctrlPoints[0].y;
    shapeCtrlPoints[1].x = ctrlPoints[1].x;
    shapeCtrlPoints[1].y = ctrlPoints[1].y;
    this._focusShape.updateLine();
    //this._focusShape.setSrcControlPoint(ctrlPoints[0]);
    //this._focusShape.setDestControlPoint(ctrlPoints[1]);
};

mindplot.RelationshipLine.prototype.addEventListener = function(type, listener){
    // Translate to web 2d events ...
    if (type == 'onfocus')
    {
        type = 'mousedown';
    }

    var line = this._line2d;
    line.addEventListener(type, listener);
};

mindplot.RelationshipLine.prototype.isOnFocus = function()
{
    return this._onFocus;
};

mindplot.RelationshipLine.prototype.isInWorkspace = function(){
    return this._isInWorkspace;
};

mindplot.RelationshipLine.prototype.setVisibility = function(value)
{
    mindplot.RelationshipLine.superClass.setVisibility.call(this,value);
    this._endArrow.setVisibility(this._showEndArrow && value);
    this._startArrow.setVisibility(this._showStartArrow && value);
};

mindplot.RelationshipLine.prototype.setOpacity = function(opacity){
    mindplot.RelationshipLine.superClass.setOpacity.call(this,opacity);
    if(this._showEndArrow)
        this._endArrow.setOpacity(opacity);
    if(this._showStartArrow)
        this._startArrow.setOpacity(opacity);
};

mindplot.RelationshipLine.prototype.setShowEndArrow = function(visible){
    this._showEndArrow = visible;
    if(this._isInWorkspace)
        this.redraw();
};

mindplot.RelationshipLine.prototype.setShowStartArrow = function(visible){
    this._showStartArrow = visible;
    if(this._isInWorkspace)
        this.redraw();
};

mindplot.RelationshipLine.prototype.isShowEndArrow = function(){
    return this._showEndArrow;
};

mindplot.RelationshipLine.prototype.isShowStartArrow = function(){
    return this._showStartArrow;
};

mindplot.RelationshipLine.prototype.setFrom = function(x,y){
    this._line2d.setFrom(x,y);
    this._startArrow.setFrom(x,y);
};

mindplot.RelationshipLine.prototype.setTo = function(x,y){
    this._line2d.setTo(x,y);
    this._endArrow.setFrom(x,y);
};

mindplot.RelationshipLine.prototype.setSrcControlPoint = function(control){
    this._line2d.setSrcControlPoint(control);
    this._startArrow.setControlPoint(control);
};

mindplot.RelationshipLine.prototype.setDestControlPoint = function(control){
    this._line2d.setDestControlPoint(control);
    this._endArrow.setControlPoint(control);
};

mindplot.RelationshipLine.prototype.getControlPoints = function(){
    return this._line2d.getControlPoints();
};

mindplot.RelationshipLine.prototype.isSrcControlPointCustom = function(){
    return this._line2d.isSrcControlPointCustom();
};

mindplot.RelationshipLine.prototype.isDestControlPointCustom = function(){
    return this._line2d.isDestControlPointCustom();
};

mindplot.RelationshipLine.prototype.setIsSrcControlPointCustom = function(isCustom){
    this._line2d.setIsSrcControlPointCustom(isCustom);
};

mindplot.RelationshipLine.prototype.setIsDestControlPointCustom = function(isCustom){
    this._line2d.setIsDestControlPointCustom(isCustom);
};


mindplot.RelationshipLine.type = "RelationshipLine";