Metamaps.JIT = {
    vizData: [], // contains the visualization-compatible graph
    graphRendered: false, // flag indicates if we have rendered the data so we don't bother doing it again wastefully
    /**
     * This method will bind the event handlers it is interested and initialize the class.
     */
    init: function () {
        var self = Metamaps.JIT;

        self.prepareVizData();
    },
    /**
     * convert our topic JSON into something JIT can use
     */
    prepareVizData: function () {
        var self = Metamaps.JIT;
        var topic;
        var mapping;
        var node;
        var nodes = {};
        var existingEdge;
        var edge;
        var edges = [];

        Metamaps.Topics.each(function (t) {
            node = t.createNode();
            nodes[node.id] = node;
        });
        Metamaps.Synapses.each(function (s) {
            edge = s.createEdge();

            existingEdge = _.findWhere(edges, {
                nodeFrom: edge.nodeFrom,
                nodeTo: edge.nodeTo
            }) ||
                _.findWhere(edges, {
                    nodeFrom: edge.nodeTo,
                    nodeTo: edge.nodeFrom
                });

            if (existingEdge) {
                // for when you're dealing with multiple relationships between the same two topics
                if (Metamaps.Active.Map) {
                    mapping = s.getMapping();
                    existingEdge['$mappingIDs'].push(mapping.isNew() ? mapping.cid : mapping.id);
                }
                existingEdge['$synapseIDs'].push(s.id);
            } else {
                // for when you're dealing with a topic that has relationships to many different nodes
                nodes[edge.nodeFrom].adjacencies.push(edge);
            }
        });
        _.each(nodes, function (node) {
            self.vizData.push(node);
        });

        if (self.vizData.length == 0) {
            Metamaps.Visualize.loadLater = true;
        }

        Metamaps.Visualize.render("infovis", self.vizData);
    }, // prepareVizData
    edgeRender: function (adj, canvas) {
        //get nodes cartesian coordinates 
        var pos = adj.nodeFrom.pos.getc(true);
        var posChild = adj.nodeTo.pos.getc(true);

        var synapse = adj.getData("synapses")[0]; // for now, just grab the first synapse

        var directionCat = synapse.get("category");

        //label placement on edges
        Metamaps.JIT.renderEdgeArrows($jit.Graph.Plot.edgeHelper, adj, synapse);

        //check for edge label in data  
        var desc = synapse.get("desc");

        var showDesc = adj.getData("showDesc");

        if (desc != "" && showDesc) {
            // '&' to '&'
            desc = Metamaps.Util.decodeEntities(desc);

            //now adjust the label placement 
            var ctx = canvas.getCtx();
            ctx.font = 'bold 14px arial';
            ctx.fillStyle = '#FFF';
            ctx.textBaseline = 'hanging';

            var arrayOfLabelLines = Metamaps.Util.splitLine(desc, 30).split('\n');
            var index, lineWidths = [];
            for (index = 0; index < arrayOfLabelLines.length; ++index) {
                lineWidths.push(ctx.measureText(arrayOfLabelLines[index]).width)
            }
            var width = Math.max.apply(null, lineWidths) + 8;
            var height = (16 * arrayOfLabelLines.length) + 8;

            var x = (pos.x + posChild.x - width) / 2;
            var y = ((pos.y + posChild.y) / 2) - height / 2;
            var radius = 5;

            //render background
            ctx.beginPath();
            ctx.moveTo(x + radius, y);
            ctx.lineTo(x + width - radius, y);
            ctx.quadraticCurveTo(x + width, y, x + width, y + radius);
            ctx.lineTo(x + width, y + height - radius);
            ctx.quadraticCurveTo(x + width, y + height, x + width - radius, y + height);
            ctx.lineTo(x + radius, y + height);
            ctx.quadraticCurveTo(x, y + height, x, y + height - radius);
            ctx.lineTo(x, y + radius);
            ctx.quadraticCurveTo(x, y, x + radius, y);
            ctx.closePath();
            ctx.fill();

            //render text
            ctx.fillStyle = '#222222';
            ctx.textAlign = 'center';
            for (index = 0; index < arrayOfLabelLines.length; ++index) {
                ctx.fillText(arrayOfLabelLines[index], x + (width / 2), y + 5 + (16 * index));
            }
        }
    }, // edgeRender
    edgeRenderEmbed: function (adj, canvas) {
        //get nodes cartesian coordinates 
        var pos = adj.nodeFrom.pos.getc(true);
        var posChild = adj.nodeTo.pos.getc(true);

        var directionCat = adj.getData("category");
        //label placement on edges 
        Metamaps.JIT.renderEdgeArrows(this.edgeHelper, adj);

        //check for edge label in data  
        var desc = adj.getData("desc");
        var showDesc = adj.getData("showDesc");
        if (desc != "" && showDesc) {
            // '&amp;' to '&'
            desc = Metamaps.Util.decodeEntities(desc);

            //now adjust the label placement 
            var ctx = canvas.getCtx();
            ctx.font = 'bold 14px arial';
            ctx.fillStyle = '#FFF';
            ctx.textBaseline = 'hanging';

            var arrayOfLabelLines = Metamaps.Util.splitLine(desc, 30).split('\n');
            var index, lineWidths = [];
            for (index = 0; index < arrayOfLabelLines.length; ++index) {
                lineWidths.push(ctx.measureText(arrayOfLabelLines[index]).width)
            }
            var width = Math.max.apply(null, lineWidths) + 8;
            var height = (16 * arrayOfLabelLines.length) + 8;

            var x = (pos.x + posChild.x - width) / 2;
            var y = ((pos.y + posChild.y) / 2) - height / 2;
            var radius = 5;

            //render background
            ctx.beginPath();
            ctx.moveTo(x + radius, y);
            ctx.lineTo(x + width - radius, y);
            ctx.quadraticCurveTo(x + width, y, x + width, y + radius);
            ctx.lineTo(x + width, y + height - radius);
            ctx.quadraticCurveTo(x + width, y + height, x + width - radius, y + height);
            ctx.lineTo(x + radius, y + height);
            ctx.quadraticCurveTo(x, y + height, x, y + height - radius);
            ctx.lineTo(x, y + radius);
            ctx.quadraticCurveTo(x, y, x + radius, y);
            ctx.closePath();
            ctx.fill();

            //render text
            ctx.fillStyle = '#222222';
            ctx.textAlign = 'center';
            for (index = 0; index < arrayOfLabelLines.length; ++index) {
                ctx.fillText(arrayOfLabelLines[index], x + (width / 2), y + 5 + (16 * index));
            }
        }
    }, // edgeRenderEmbed
    ForceDirected: {
        animateSavedLayout: {
            modes: ['linear'],
            transition: $jit.Trans.Quad.easeInOut,
            duration: 800,
            onComplete: function () {
                Metamaps.Visualize.mGraph.busy = false;
            }
        },
        animateFDLayout: {
            modes: ['linear'],
            transition: $jit.Trans.Elastic.easeOut,
            duration: 2500,
            onComplete: function () {
                Metamaps.Visualize.mGraph.busy = false;
            }
        },
        graphSettings: {
            //id of the visualization container
            injectInto: 'infovis',
            //Enable zooming and panning
            //by scrolling and DnD
            Navigation: {
                enable: true,
                //Enable panning events only if we're dragging the empty
                //canvas (and not a node).
                panning: 'avoid nodes',
                zooming: 28 //zoom speed. higher is more sensible
            },
            background: {
                type: 'Metamaps'
            },
            //NodeStyles: {  
            //  enable: true,  
            //  type: 'Native',  
            //  stylesHover: {  
            //    dim: 30  
            //  },  
            //  duration: 300  
            //},
            // Change node and edge styles such as
            // color and width.
            // These properties are also set per node
            // with dollar prefixed data-properties in the
            // JSON structure.
            Node: {
                overridable: true,
                color: '#2D6A5D',
                type: 'customNode',
                dim: 25
            },
            Edge: {
                overridable: true,
                color: Metamaps.Settings.colors.synapses.normal,
                type: 'customEdge',
                lineWidth: 2,
                alpha: 0.4
            },
            //Native canvas text styling
            Label: {
                type: 'Native', //Native or HTML
                size: 20,
                family: 'arial',
                textBaseline: 'hanging',
                color: Metamaps.Settings.colors.labels.text
            },
            //Add Tips
            Tips: {
                enable: false,
                onShow: function (tip, node) {}
            },
            // Add node events
            Events: {
                enable: true,
                enableForEdges: true,
                onMouseMove: function (node, eventInfo, e) {
                    Metamaps.JIT.onMouseMoveHandler(node, eventInfo, e);
                },
                //Update node positions when dragged
                onDragMove: function (node, eventInfo, e) {
                    Metamaps.JIT.onDragMoveTopicHandler(node, eventInfo, e);
                },
                onDragEnd: function (node, eventInfo, e) {
                    Metamaps.JIT.onDragEndTopicHandler(node, eventInfo, e, false);
                },
                onDragCancel: function (node, eventInfo, e) {
                    Metamaps.JIT.onDragCancelHandler(node, eventInfo, e, false);
                },
                //Implement the same handler for touchscreens
                onTouchStart: function (node, eventInfo, e) {
                    //$jit.util.event.stop(e); //stop default touchmove event
                    //Metamaps.Visualize.mGraph.events.onMouseDown(e, null, eventInfo);
                    Metamaps.Visualize.mGraph.events.touched = true;
                    Metamaps.Touch.touchPos = eventInfo.getPos();
                    var canvas = Metamaps.Visualize.mGraph.canvas,
                        ox = canvas.translateOffsetX;
                    oy = canvas.translateOffsetY,
                    sx = canvas.scaleOffsetX,
                    sy = canvas.scaleOffsetY;
                    Metamaps.Touch.touchPos.x *= sx;
                    Metamaps.Touch.touchPos.y *= sy;
                    Metamaps.Touch.touchPos.x += ox;
                    Metamaps.Touch.touchPos.y += oy;

                    touchDragNode = node;
                },
                //Implement the same handler for touchscreens
                onTouchMove: function (node, eventInfo, e) {
                    if (Metamaps.Touch.touchDragNode) Metamaps.JIT.onDragMoveTopicHandler(Metamaps.Touch.touchDragNode, eventInfo, e);
                    else {
                        Metamaps.JIT.touchPanZoomHandler(eventInfo, e);
                    }
                },
                //Implement the same handler for touchscreens
                onTouchEnd: function (node, eventInfo, e) {

                },
                //Implement the same handler for touchscreens
                onTouchCancel: function (node, eventInfo, e) {

                },
                //Add also a click handler to nodes
                onClick: function (node, eventInfo, e) {

                    // remove the rightclickmenu
                    $('.rightclickmenu').remove();

                    if (Metamaps.Mouse.boxStartCoordinates) {
                        Metamaps.Visualize.mGraph.busy = false;
                        Metamaps.Mouse.boxEndCoordinates = eventInfo.getPos();
                        Metamaps.JIT.selectNodesWithBox();
                        return;
                    }

                    if (e.target.id != "infovis-canvas") return false;

                    //clicking on a edge, node, or clicking on blank part of canvas?
                    if (node.nodeFrom) {
                        Metamaps.JIT.selectEdgeOnClickHandler(node, e);
                    } else if (node && !node.nodeFrom) {
                        Metamaps.JIT.selectNodeOnClickHandler(node, e);
                    } else {
                        Metamaps.JIT.canvasClickHandler(eventInfo.getPos(), e);
                    } //if
                },
                //Add also a click handler to nodes
                onRightClick: function (node, eventInfo, e) {

                    // remove the rightclickmenu
                    $('.rightclickmenu').remove();

                    if (Metamaps.Mouse.boxStartCoordinates) {
                        Metamaps.Visualize.mGraph.busy = false;
                        Metamaps.Mouse.boxEndCoordinates = eventInfo.getPos();
                        Metamaps.JIT.selectNodesWithBox();
                        return;
                    }

                    if (e.target.id != "infovis-canvas") return false;

                    //clicking on a edge, node, or clicking on blank part of canvas?
                    if (node.nodeFrom) {
                        Metamaps.JIT.selectEdgeOnRightClickHandler(node, e);
                    } else if (node && !node.nodeFrom) {
                        Metamaps.JIT.selectNodeOnRightClickHandler(node, e);
                    } else {
                        console.log('right clicked on open space');
                    } //if
                }
            },
            //Number of iterations for the FD algorithm
            iterations: 200,
            //Edge length
            levelDistance: 200,
        },
        nodeSettings: {
            'customNode': {
                'render': function (node, canvas) {
                    var pos = node.pos.getc(true),
                        dim = node.getData('dim'),
                        topic = node.getData('topic'),
                        metacode = topic ? topic.getMetacode() : false,
                        ctx = canvas.getCtx();

                    // if the topic is selected draw a circle around it
                    if (node.selected) {
                        ctx.beginPath();
                        ctx.arc(pos.x, pos.y, dim + 3, 0, 2 * Math.PI, false);
                        ctx.strokeStyle = Metamaps.Settings.colors.topics.selected;
                        ctx.lineWidth = 2;
                        ctx.stroke();
                    }

                    if (!metacode ||
                        !metacode.get('image') ||
                        !metacode.get('image').complete ||
                        (typeof metacode.get('image').naturalWidth !== "undefined" &&
                            metacode.get('image').naturalWidth === 0)) {
                        ctx.beginPath();
                        ctx.arc(pos.x, pos.y, dim, 0, 2 * Math.PI, false);
                        ctx.fillStyle = '#B6B2FD';
                        ctx.fill();
                    } else {
                        ctx.drawImage(metacode.get('image'), pos.x - dim, pos.y - dim, dim * 2, dim * 2);
                    }
                },
                'contains': function (node, pos) {
                    var npos = node.pos.getc(true),
                        dim = node.getData('dim'),
                        arrayOfLabelLines = Metamaps.Util.splitLine(node.name, 30).split('\n'),
                        ctx = Metamaps.Visualize.mGraph.canvas.getCtx();

                    var height = 25 * arrayOfLabelLines.length;

                    var index, lineWidths = [];
                    for (index = 0; index < arrayOfLabelLines.length; ++index) {
                        lineWidths.push(ctx.measureText(arrayOfLabelLines[index]).width)
                    }
                    var width = Math.max.apply(null, lineWidths) + 8;
                    var labely = npos.y + node.getData("height") + 5 + height / 2;

                    var overLabel = this.nodeHelper.rectangle.contains({
                        x: npos.x,
                        y: labely
                    }, pos, width, height);

                    return this.nodeHelper.circle.contains(npos, pos, dim) || overLabel;
                }
            }
        },
        edgeSettings: {
            'customEdge': {
                'render': function (adj, canvas) {
                    Metamaps.JIT.edgeRender(adj, canvas)
                },
                'contains': function (adj, pos) {
                    var from = adj.nodeFrom.pos.getc(),
                        to = adj.nodeTo.pos.getc();
                    
                    // this fixes an issue where when edges are perfectly horizontal or perfectly vertical
                    // it becomes incredibly difficult to hover over them
                    if (-1 < pos.x && pos.x < 1) pos.x = 0;
                    if (-1 < pos.y && pos.y < 1) pos.y = 0;
                    
                    return $jit.Graph.Plot.edgeHelper.line.contains(from, to, pos, adj.Edge.epsilon);
                }
            }
        }
    }, // ForceDirected
    ForceDirected3D: {
        animate: {
            modes: ['linear'],
            transition: $jit.Trans.Elastic.easeOut,
            duration: 2500,
            onComplete: function () {
                Metamaps.Visualize.mGraph.busy = false;
            }
        },
        graphSettings: {
            //id of the visualization container
            injectInto: 'infovis',
            type: '3D',
            Scene: {
                Lighting: {
                    enable: false,
                    ambient: [0.5, 0.5, 0.5],
                    directional: {
                        direction: {
                            x: 1,
                            y: 0,
                            z: -1
                        },
                        color: [0.9, 0.9, 0.9]
                    }
                }
            },
            //Enable zooming and panning
            //by scrolling and DnD
            Navigation: {
                enable: false,
                //Enable panning events only if we're dragging the empty
                //canvas (and not a node).
                panning: 'avoid nodes',
                zooming: 10 //zoom speed. higher is more sensible
            },
            // Change node and edge styles such as
            // color and width.
            // These properties are also set per node
            // with dollar prefixed data-properties in the
            // JSON structure.
            Node: {
                overridable: true,
                type: 'sphere',
                dim: 15,
                color: '#ffffff'
            },
            Edge: {
                overridable: false,
                type: 'tube',
                color: '#111',
                lineWidth: 3
            },
            //Native canvas text styling
            Label: {
                type: 'HTML', //Native or HTML
                size: 10,
                style: 'bold'
            },
            // Add node events
            Events: {
                enable: true,
                type: 'Native',
                i: 0,
                onMouseMove: function (node, eventInfo, e) {
                    //if(this.i++ % 3) return;
                    var pos = eventInfo.getPos();
                    Metamaps.Visualize.cameraPosition.x += (pos.x - Metamaps.Visualize.cameraPosition.x) * 0.5;
                    Metamaps.Visualize.cameraPosition.y += (-pos.y - Metamaps.Visualize.cameraPosition.y) * 0.5;
                    Metamaps.Visualize.mGraph.plot();
                },
                onMouseWheel: function (delta) {
                    Metamaps.Visualize.cameraPosition.z += -delta * 20;
                    Metamaps.Visualize.mGraph.plot();
                },
                onClick: function () {}
            },
            //Number of iterations for the FD algorithm
            iterations: 200,
            //Edge length
            levelDistance: 100
        },
        nodeSettings: {

        },
        edgeSettings: {

        }
    }, // ForceDirected3D
    RGraph: {
        animate: {
            modes: ['polar'],
            duration: 2000,
            onComplete: function () {
                Metamaps.Visualize.mGraph.busy = false;
            }
        },
        // this will just be used to patch the ForceDirected graphsettings with the few things which actually differ
        background: {
                //type: 'Metamaps',
                levelDistance: 200,
                numberOfCircles: 4,
                CanvasStyles: {
                    strokeStyle: '#333',
                    lineWidth: 1.5
                }
        },
        levelDistance: 200
    },
    onMouseEnter: function (edge) {

        $('canvas').css('cursor', 'pointer');
        var edgeIsSelected = Metamaps.Selected.Edges.indexOf(edge);
        //following if statement only executes if the edge being hovered over is not selected
        if (edgeIsSelected == -1) {
            edge.setData('showDesc', true, 'current');
            edge.setDataset('end', {
                lineWidth: 4,
                alpha: 1
            });
            Metamaps.Visualize.mGraph.fx.animate({
                modes: ['edge-property:lineWidth:color:alpha'],
                duration: 100
            });
            Metamaps.Visualize.mGraph.plot();
        }
    }, // onMouseEnter
    onMouseLeave: function (edge) {
        $('canvas').css('cursor', 'default');
        var edgeIsSelected = Metamaps.Selected.Edges.indexOf(edge);
        //following if statement only executes if the edge being hovered over is not selected
        if (edgeIsSelected == -1) {
            edge.setData('showDesc', false, 'current');
            edge.setDataset('end', {
                lineWidth: 2,
                alpha: 0.4
            });
            Metamaps.Visualize.mGraph.fx.animate({
                modes: ['edge-property:lineWidth:color:alpha'],
                duration: 100
            });
        }
        Metamaps.Visualize.mGraph.plot();
    }, // onMouseLeave
    onMouseMoveHandler: function (node, eventInfo, e) {

        var self = Metamaps.JIT;

        if (Metamaps.Visualize.mGraph.busy) return;

        var node = eventInfo.getNode();
        var edge = eventInfo.getEdge();

        //if we're on top of a node object, act like there aren't edges under it
        if (node != false) {
            if (Metamaps.Mouse.edgeHoveringOver) {
                self.onMouseLeave(Metamaps.Mouse.edgeHoveringOver);
            }
            $('canvas').css('cursor', 'pointer');
            return;
        }

        if (edge == false && Metamaps.Mouse.edgeHoveringOver != false) {
            //mouse not on an edge, but we were on an edge previously
            self.onMouseLeave(Metamaps.Mouse.edgeHoveringOver);
        } else if (edge != false && Metamaps.Mouse.edgeHoveringOver == false) {
            //mouse is on an edge, but there isn't a stored edge
            self.onMouseEnter(edge);
        } else if (edge != false && Metamaps.Mouse.edgeHoveringOver != edge) {
            //mouse is on an edge, but a different edge is stored
            self.onMouseLeave(Metamaps.Mouse.edgeHoveringOver)
            self.onMouseEnter(edge);
        }

        //could be false
        Metamaps.Mouse.edgeHoveringOver = edge;

        if (!node && !edge) {
            $('canvas').css('cursor', 'default');
        }
    }, // onMouseMoveHandler
    enterKeyHandler: function () {
        // this is to submit new topic creation
        if (Metamaps.Create.newTopic.beingCreated) {
            Metamaps.Topic.createTopicLocally();
        } else if (Metamaps.Create.newSynapse.beingCreated) {
            Metamaps.Synapse.createSynapseLocally();
        }
    }, //enterKeyHandler
    escKeyHandler: function () {
        Metamaps.Control.deselectAllEdges();
        Metamaps.Control.deselectAllNodes();
    }, //escKeyHandler
    touchPanZoomHandler: function (eventInfo, e) {
        if (e.touches.length == 1) {
            var thispos = Metamaps.Touch.touchPos,
                currentPos = eventInfo.getPos(),
                canvas = Metamaps.Visualize.mGraph.canvas,
                ox = canvas.translateOffsetX,
                oy = canvas.translateOffsetY,
                sx = canvas.scaleOffsetX,
                sy = canvas.scaleOffsetY;
            currentPos.x *= sx;
            currentPos.y *= sy;
            currentPos.x += ox;
            currentPos.y += oy;
            //var x = currentPos.x - thispos.x,
            //    y = currentPos.y - thispos.y;
            var x = currentPos.x - thispos.x,
                y = currentPos.y - thispos.y;
            Metamaps.Touch.touchPos = currentPos;
            Metamaps.Visualize.mGraph.canvas.translate(x * 1 / sx, y * 1 / sy);
        } else if (e.touches.length == 2) {
            var touch1 = e.touches[0];
            var touch2 = e.touches[1];

            var dist = Metamaps.Util.getDistance({
                x: touch1.clientX,
                y: touch1.clientY
            }, {
                x: touch2.clientX,
                y: touch2.clientY
            });

            if (!lastDist) {
                lastDist = dist;
            }

            var scale = dist / lastDist;

            console.log(scale);

            if (8 >= Metamaps.Visualize.mGraph.canvas.scaleOffsetX * scale && Metamaps.Visualize.mGraph.canvas.scaleOffsetX * scale >= 1) {
                Metamaps.Visualize.mGraph.canvas.scale(scale, scale);
            }
            if (Metamaps.Visualize.mGraph.canvas.scaleOffsetX < 0.5) {
                Metamaps.Visualize.mGraph.canvas.viz.labels.hideLabels(true);
            } else if (Metamaps.Visualize.mGraph.canvas.scaleOffsetX > 0.5) {
                Metamaps.Visualize.mGraph.canvas.viz.labels.hideLabels(false);
            }
            lastDist = dist;
        }

    }, // touchPanZoomHandler
    onDragMoveTopicHandler: function (node, eventInfo, e) {

        var self = Metamaps.JIT;

        if (node && !node.nodeFrom) {
            Metamaps.Create.newTopic.hide();
            Metamaps.Create.newSynapse.hide();
            var pos = eventInfo.getPos();
            // if it's a left click, or a touch, move the node
            if (e.touches || (e.button == 0 && !e.altKey && (e.buttons == 0 || e.buttons == 1 || e.buttons == undefined))) {
                //if the node dragged isn't already selected, select it
                var whatToDo = self.handleSelectionBeforeDragging(node, e);
                if (node.pos.rho || node.pos.rho === 0) {
                    var rho = Math.sqrt(pos.x * pos.x + pos.y * pos.y);
                    var theta = Math.atan2(pos.y, pos.x);
                    node.pos.setp(theta, rho);
                } else if (whatToDo == 'only-drag-this-one') {
                    node.pos.setc(pos.x, pos.y);
                    node.setData('xloc', pos.x);
                    node.setData('yloc', pos.y);
                } else {
                    var len = Metamaps.Selected.Nodes.length;

                    //first define offset for each node
                    var xOffset = new Array();
                    var yOffset = new Array();
                    for (var i = 0; i < len; i += 1) {
                        var n = Metamaps.Selected.Nodes[i];
                        xOffset[i] = n.pos.x - node.pos.x;
                        yOffset[i] = n.pos.y - node.pos.y;
                    } //for

                    for (var i = 0; i < len; i += 1) {
                        var n = Metamaps.Selected.Nodes[i];
                        var x = pos.x + xOffset[i];
                        var y = pos.y + yOffset[i];
                        n.pos.setc(x, y);
                        n.setData('xloc', x);
                        n.setData('yloc', y);
                    } //for
                } //if

                if (whatToDo == 'deselect') {
                    Metamaps.Control.deselectNode(node);
                }
                Metamaps.Visualize.mGraph.plot();
            }
            // if it's a right click or holding down alt, start synapse creation  ->third option is for firefox
            else if ((e.button == 2 || (e.button == 0 && e.altKey) || e.buttons == 2) && Metamaps.Active.Mapper) {
                if (tempInit == false) {
                    tempNode = node;
                    tempInit = true;

                    // set the draw synapse start positions
                    var l = Metamaps.Selected.Nodes.length;
                    if (l > 0) {
                        for (var i = l - 1; i >= 0; i -= 1) {
                            var n = Metamaps.Selected.Nodes[i];
                            Metamaps.Mouse.synapseStartCoordinates.push({
                                x: n.pos.getc().x,
                                y: n.pos.getc().y
                            });
                        }
                    } else {
                        Metamaps.Mouse.synapseStartCoordinates = [{
                            x: tempNode.pos.getc().x,
                            y: tempNode.pos.getc().y
                        }];
                    }
                    Metamaps.Mouse.synapseEndCoordinates = {
                        x: pos.x,
                        y: pos.y
                    };
                }
                //
                temp = eventInfo.getNode();
                if (temp != false && temp.id != node.id && Metamaps.Selected.Nodes.indexOf(temp) == -1) { // this means a Node has been returned
                    tempNode2 = temp;
                    Metamaps.Visualize.mGraph.plot();

                    Metamaps.Mouse.synapseEndCoordinates = {
                        x: tempNode2.pos.getc().x,
                        y: tempNode2.pos.getc().y
                    };

                    // before making the highlighted one bigger, make sure all the others are regular size
                    Metamaps.Visualize.mGraph.graph.eachNode(function (n) {
                        n.setData('dim', 25, 'current');
                    });
                    temp.setData('dim', 35, 'current');
                    Metamaps.Visualize.mGraph.fx.plotNode(tempNode, Metamaps.Visualize.mGraph.canvas);
                    Metamaps.Visualize.mGraph.fx.plotNode(temp, Metamaps.Visualize.mGraph.canvas);
                } else if (!temp) {
                    tempNode2 = null;
                    Metamaps.Visualize.mGraph.graph.eachNode(function (n) {
                        n.setData('dim', 25, 'current');
                    });
                    //pop up node creation :)
                    var myX = e.clientX - 110;
                    var myY = e.clientY - 30;
                    $('#new_topic').css('left', myX + "px");
                    $('#new_topic').css('top', myY + "px");
                    $('#new_synapse').css('left', myX + "px");
                    $('#new_synapse').css('top', myY + "px");
                    Metamaps.Create.newTopic.x = eventInfo.getPos().x;
                    Metamaps.Create.newTopic.y = eventInfo.getPos().y;
                    Metamaps.Visualize.mGraph.plot();

                    Metamaps.Mouse.synapseEndCoordinates = {
                        x: pos.x,
                        y: pos.y
                    };
                }
            }
        }
    }, // onDragMoveTopicHandler
    onDragCancelHandler: function (node, eventInfo, e) {
        tempNode = null;
        tempNode2 = null;
        tempInit = false;
        // reset the draw synapse positions to false
        Metamaps.Mouse.synapseStartCoordinates = [];
        Metamaps.Mouse.synapseEndCoordinates = null;
        Metamaps.Visualize.mGraph.plot();
    }, // onDragCancelHandler
    onDragEndTopicHandler: function (node, eventInfo, e) {
        var mapping;

        if (tempInit && tempNode2 == null) {
            // this means you want to add a new topic, and then a synapse
            Metamaps.Create.newTopic.addSynapse = true;
            Metamaps.Create.newTopic.open();
        } else if (tempInit && tempNode2 != null) {
            // this means you want to create a synapse between two existing topics
            Metamaps.Create.newTopic.addSynapse = false;
            Metamaps.Create.newSynapse.topic1id = tempNode.id;
            Metamaps.Create.newSynapse.topic2id = tempNode2.id;
            Metamaps.Create.newSynapse.open();
            tempNode = null;
            tempNode2 = null;
            tempInit = false;
        } else if (!tempInit && node && !node.nodeFrom) {
            // this means you dragged an existing node, autosave that to the database
            if (Metamaps.Active.Map) {
                mapping = node.getData('mapping');
                mapping.set({
                    xloc: node.getPos().x,
                    yloc: node.getPos().y
                });
                mapping.save();
            }
        }
    }, //onDragEndTopicHandler
    canvasClickHandler: function (canvasLoc, e) {
        //grab the location and timestamp of the click 
        var storedTime = Metamaps.Mouse.lastCanvasClick;
        var now = Date.now(); //not compatible with IE8 FYI 
        Metamaps.Mouse.lastCanvasClick = now;

        if (now - storedTime < Metamaps.Mouse.DOUBLE_CLICK_TOLERANCE && !Metamaps.Mouse.didPan) {
            // DOUBLE CLICK
            //pop up node creation :) 
            Metamaps.Create.newTopic.addSynapse = false;
            Metamaps.Create.newTopic.x = canvasLoc.x;
            Metamaps.Create.newTopic.y = canvasLoc.y;
            $('#new_topic').css('left', e.clientX + "px");
            $('#new_topic').css('top', e.clientY + "px");
            Metamaps.Create.newTopic.open();
        } else if (!Metamaps.Mouse.didPan) {
            // SINGLE CLICK, no pan
            Metamaps.TopicCard.hideCard();
            Metamaps.SynapseCard.hideCard();
            Metamaps.Create.newTopic.hide();
            Metamaps.Create.newSynapse.hide();
            $('.rightclickmenu').remove();
            // reset the draw synapse positions to false
            Metamaps.Mouse.synapseStartCoordinates = [];
            Metamaps.Mouse.synapseEndCoordinates = null;
            tempInit = false;
            tempNode = null;
            tempNode2 = null;
            Metamaps.Control.deselectAllEdges();
            Metamaps.Control.deselectAllNodes();
        }
    }, //canvasClickHandler 
    nodeDoubleClickHandler: function (node, e) {

        Metamaps.TopicCard.showCard(node);

    }, // nodeDoubleClickHandler
    edgeDoubleClickHandler: function (adj, e) {

        Metamaps.SynapseCard.showCard(adj, e);

    }, // nodeDoubleClickHandler
    nodeWasDoubleClicked: function () {
        //grab the timestamp of the click 
        var storedTime = Metamaps.Mouse.lastNodeClick;
        var now = Date.now(); //not compatible with IE8 FYI 
        Metamaps.Mouse.lastNodeClick = now;

        if (now - storedTime < Metamaps.Mouse.DOUBLE_CLICK_TOLERANCE) {
            return true;
        } else {
            return false;
        }
    }, //nodeWasDoubleClicked;
    handleSelectionBeforeDragging: function (node, e) {
        // four cases:
        // 1 nothing is selected, so pretend you aren't selecting
        // 2 others are selected only and shift, so additionally select this one
        // 3 others are selected only, no shift: drag only this one
        // 4 this node and others were selected, so drag them (just return false)
        //return value: deselect node again after?
        if (Metamaps.Selected.Nodes.length == 0) {
            Metamaps.Control.selectNode(node);
            return 'deselect';
        }
        if (Metamaps.Selected.Nodes.indexOf(node) == -1) {
            if (e.shiftKey) {
                Metamaps.Control.selectNode(node);
                return 'nothing';
            } else {
                return 'only-drag-this-one';
            }
        }
        return 'nothing'; //case 4?
    }, //  handleSelectionBeforeDragging
    selectNodesWithBox: function () {

        var sX = Metamaps.Mouse.boxStartCoordinates.x,
            sY = Metamaps.Mouse.boxStartCoordinates.y,
            eX = Metamaps.Mouse.boxEndCoordinates.x,
            eY = Metamaps.Mouse.boxEndCoordinates.y;


        Metamaps.Visualize.mGraph.graph.eachNode(function (n) {
            var x = n.pos.x,
                y = n.pos.y;

            if ((sX < x && x < eX && sY < y && y < eY) || (sX > x && x > eX && sY > y && y > eY) || (sX > x && x > eX && sY < y && y < eY) || (sX < x && x < eX && sY > y && y > eY)) {
                var nodeIsSelected = Metamaps.Selected.Nodes.indexOf(n);
                if (nodeIsSelected == -1) Metamaps.Control.selectNode(n); // the node is not selected, so select it
                else if (nodeIsSelected != -1) Metamaps.Control.deselectNode(n); // the node is selected, so deselect it

            }
        });

        Metamaps.Mouse.boxStartCoordinates = false;
        Metamaps.Mouse.boxEndCoordinates = false;
        Metamaps.Visualize.mGraph.plot();
    }, // selectNodesWithBox
    drawSelectBox: function (eventInfo, e) {
        var ctx = Metamaps.Visualize.mGraph.canvas.getCtx();

        var startX = Metamaps.Mouse.boxStartCoordinates.x,
            startY = Metamaps.Mouse.boxStartCoordinates.y,
            currX = eventInfo.getPos().x,
            currY = eventInfo.getPos().y;

        Metamaps.Visualize.mGraph.canvas.clear();
        Metamaps.Visualize.mGraph.plot();

        ctx.beginPath();
        ctx.moveTo(startX, startY);
        ctx.lineTo(startX, currY);
        ctx.lineTo(currX, currY);
        ctx.lineTo(currX, startY);
        ctx.lineTo(startX, startY);
        ctx.strokeStyle = "black";
        ctx.stroke();
    }, // drawSelectBox
    selectNodeOnClickHandler: function (node, e) {
        if (Metamaps.Visualize.mGraph.busy) return;

        var self = Metamaps.JIT;

        // catch right click on mac, which is often like ctrl+click
        if (navigator.platform.indexOf("Mac") != -1 && e.ctrlKey) {
            self.selectNodeOnRightClickHandler(node, e)
            return;
        }

        // if on a topic page, let alt+click center you on a new topic
        if (Metamaps.Active.Topic && e.altKey) {
            Metamaps.RGraph.centerOn(node.id);
            return;
        }

        var check = self.nodeWasDoubleClicked();
        if (check) {
            self.nodeDoubleClickHandler(node, e);
            return;
        } else {
            // wait a certain length of time, then check again, then run this code
            setTimeout(function () {
                if (!Metamaps.JIT.nodeWasDoubleClicked()) {
                    if (!e.shiftKey) {
                        Metamaps.Control.deselectAllNodes();
                        Metamaps.Control.deselectAllEdges();
                    }
                    if (node.selected) {
                        Metamaps.Control.deselectNode(node);
                    } else {
                        Metamaps.Control.selectNode(node);
                    }
                    //trigger animation to final styles
                    Metamaps.Visualize.mGraph.fx.animate({
                        modes: ['edge-property:lineWidth:color:alpha'],
                        duration: 500
                    });
                    Metamaps.Visualize.mGraph.plot();
                }
            }, Metamaps.Mouse.DOUBLE_CLICK_TOLERANCE);
        }
    }, //selectNodeOnClickHandler
    selectNodeOnRightClickHandler: function (node, e) {
        // the 'node' variable is a JIT node, the one that was clicked on
        // the 'e' variable is the click event

        e.preventDefault();
        e.stopPropagation();

        if (Metamaps.Visualize.mGraph.busy) return;

        // delete old right click menu
        $('.rightclickmenu').remove();
        // create new menu for clicked on node
        var rightclickmenu = document.createElement("div");
        rightclickmenu.className = "rightclickmenu";

        // add the proper options to the menu
        var menustring = '<ul>';

        if (Metamaps.Active.Mapper) menustring += '<li class="rc-delete">Delete</li>';
        if (Metamaps.Active.Map && Metamaps.Active.Mapper) menustring += '<li class="rc-remove">Remove from map</li>';
        menustring += '<li class="rc-hide">Hide until refresh</li>';

        if (!Metamaps.Active.Map) menustring += '<li class="rc-center">Center this topic</li>';
        menustring += '<li class="rc-popout">Open in new tab</li>';
        if (Metamaps.Active.Mapper) {
            var options = '<ul><li class="changeP toCommons">commons</li> \
                         <li class="changeP toPublic">public</li> \
                         <li class="changeP toPrivate">private</li> \
                     </ul>';

            menustring += '<li class="rc-permission">Change permissions' + options + '</li>';
        }

        menustring += '</ul>';
        rightclickmenu.innerHTML = menustring;

        // position the menu where the click happened
        $(rightclickmenu).css({
            left: e.clientX,
            top: e.clientY
        });
        //add the menu to the page
        $('#center-container').append(rightclickmenu);


        // attach events to clicks on the list items

        // delete the selected things from the database
        $('.rc-delete').click(function () {
            $('.rightclickmenu').remove();
            var n = Metamaps.Selected.Nodes.length;
            var e = Metamaps.Selected.Edges.length;
            var ntext = n == 1 ? "1 topic" : n + " topics";
            var etext = e == 1 ? "1 synapse" : e + " synapses";
            var text = "You have " + ntext + " and " + etext + " selected. ";

            var r = confirm(text + "Are you sure you want to permanently delete them all? This will remove them from all maps they appear on.");
            if (r == true) {
                Metamaps.Control.deleteSelectedEdges();
                Metamaps.Control.deleteSelectedNodes();
            }
        });

        // remove the selected things from the map
        $('.rc-remove').click(function () {
            $('.rightclickmenu').remove();
            Metamaps.Control.removeSelectedEdges();
            Metamaps.Control.removeSelectedNodes();
        });

        // hide selected nodes and synapses until refresh
        $('.rc-hide').click(function () {
            $('.rightclickmenu').remove();
            Metamaps.Control.hideSelectedEdges();
            Metamaps.Control.hideSelectedNodes();
        });

        // when in radial, center on the topic you picked
        $('.rc-center').click(function () {
            $('.rightclickmenu').remove();
            centerOn(node.id);
        });

        // open the entity in a new tab
        $('.rc-popout').click(function () {
            $('.rightclickmenu').remove();
            var win = window.open('/topics/' + node.id, '_blank');
            win.focus();
        });

        // change the permission of all the selected nodes and synapses that you were the originator of
        $('.rc-permission li').click(function () {
            $('.rightclickmenu').remove();
            // $(this).text() will be 'commons' 'public' or 'private'
            Metamaps.Control.updateSelectedPermissions($(this).text());
        });

    }, //selectNodeOnRightClickHandler
    selectEdgeOnClickHandler: function (adj, e) {
        if (Metamaps.Visualize.mGraph.busy) return;

        var self = Metamaps.JIT;

        // catch right click on mac, which is often like ctrl+click
        if (navigator.platform.indexOf("Mac") != -1 && e.ctrlKey) {
            self.selectEdgeOnRightClickHandler(adj, e)
            return;
        }

        var check = self.nodeWasDoubleClicked();
        if (check) {
            self.edgeDoubleClickHandler(adj, e);
            return;
        } else {
            // wait a certain length of time, then check again, then run this code
            setTimeout(function () {
                if (!Metamaps.JIT.nodeWasDoubleClicked()) {
                    if (!e.shiftKey) {
                        Metamaps.Control.deselectAllNodes();
                        Metamaps.Control.deselectAllEdges();
                    }
                    if (Metamaps.Selected.Edges.indexOf(adj) !== -1) {
                        Metamaps.Control.deselectEdge(adj);
                    } else {
                        Metamaps.Control.selectEdge(adj);
                    }
                    Metamaps.Visualize.mGraph.plot();
                }
            }, Metamaps.Mouse.DOUBLE_CLICK_TOLERANCE);
        }
    }, //selectEdgeOnClickHandler
    selectEdgeOnRightClickHandler: function (adj, e) {
        // the 'node' variable is a JIT node, the one that was clicked on
        // the 'e' variable is the click event

        var authorized;

        e.preventDefault();
        e.stopPropagation();

        if (Metamaps.Visualize.mGraph.busy) return;

        Metamaps.Control.selectEdge(adj);

        // delete old right click menu
        $('.rightclickmenu').remove();
        // create new menu for clicked on node
        var rightclickmenu = document.createElement("div");
        rightclickmenu.className = "rightclickmenu";

        // add the proper options to the menu
        var menustring = '<ul>';

        if (Metamaps.Active.Mapper) menustring += '<li class="rc-delete">Delete</li>';
        if (Metamaps.Active.Map && Metamaps.Active.Map.authorizeToEdit(Metamaps.Active.Mapper)) {
            menustring += '<li class="rc-remove">Remove from map</li>';
        }
        menustring += '<li class="rc-hide">Hide until refresh</li>';
        if (Metamaps.Active.Mapper) {
            var options = '<ul><li class="changeP toCommons">commons</li> \
                         <li class="changeP toPublic">public</li> \
                         <li class="changeP toPrivate">private</li> \
                     </ul>';

            menustring += '<li class="rc-permission">Change permissions' + options + '</li>';
        }

        menustring += '</ul>';
        rightclickmenu.innerHTML = menustring;

        // position the menu where the click happened
        $(rightclickmenu).css({
            left: e.clientX,
            top: e.clientY
        });
        //add the menu to the page
        $('#center-container').append(rightclickmenu);


        // attach events to clicks on the list items

        // delete the selected things from the database
        $('.rc-delete').click(function () {
            $('.rightclickmenu').remove();
            var n = Metamaps.Selected.Nodes.length;
            var e = Metamaps.Selected.Edges.length;
            var ntext = n == 1 ? "1 topic" : n + " topics";
            var etext = e == 1 ? "1 synapse" : e + " synapses";
            var text = "You have " + ntext + " and " + etext + " selected. ";

            var r = confirm(text + "Are you sure you want to permanently delete them all? This will remove them from all maps they appear on.");
            if (r == true) {
                Metamaps.Control.deleteSelectedEdges();
                Metamaps.Control.deleteSelectedNodes();
            }
        });

        // remove the selected things from the map
        $('.rc-remove').click(function () {
            $('.rightclickmenu').remove();
            Metamaps.Control.removeSelectedEdges();
            Metamaps.Control.removeSelectedNodes();
        });

        // hide selected nodes and synapses until refresh
        $('.rc-hide').click(function () {
            $('.rightclickmenu').remove();
            Metamaps.Control.hideSelectedEdges();
            Metamaps.Control.hideSelectedNodes();
        });

        // change the permission of all the selected nodes and synapses that you were the originator of
        $('.rc-permission li').click(function () {
            $('.rightclickmenu').remove();
            // $(this).text() will be 'commons' 'public' or 'private'
            Metamaps.Control.updateSelectedPermissions($(this).text());
        });

    }, //selectEdgeOnRightClickHandler
    SmoothPanning: function () {

        var sx = Metamaps.Visualize.mGraph.canvas.scaleOffsetX,
            sy = Metamaps.Visualize.mGraph.canvas.scaleOffsetY,
            y_velocity = Metamaps.Mouse.changeInY, // initial y velocity
            x_velocity = Metamaps.Mouse.changeInX, // initial x velocity
            easing = 1; // frictional value

        easing = 1;
        window.clearInterval(panningInt)
        panningInt = setInterval(function () {
            myTimer()
        }, 1);

        function myTimer() {
            Metamaps.Visualize.mGraph.canvas.translate(x_velocity * easing * 1 / sx, y_velocity * easing * 1 / sy);
            easing = easing * 0.75;

            if (easing < 0.1) window.clearInterval(panningInt);
        }
    }, // SmoothPanning
    renderMidArrow: function (from, to, dim, swap, canvas, placement, newSynapse) {
        var ctx = canvas.getCtx();
        // invert edge direction 
        if (swap) {
            var tmp = from;
            from = to;
            to = tmp;
        }
        // vect represents a line from tip to tail of the arrow 
        var vect = new $jit.Complex(to.x - from.x, to.y - from.y);
        // scale it 
        vect.$scale(dim / vect.norm());
        // compute the midpoint of the edge line 
        var newX = (to.x - from.x) * placement + from.x;
        var newY = (to.y - from.y) * placement + from.y;
        var midPoint = new $jit.Complex(newX, newY);

        // move midpoint by half the "length" of the arrow so the arrow is centered on the midpoint 
        var arrowPoint = new $jit.Complex((vect.x / 0.7) + midPoint.x, (vect.y / 0.7) + midPoint.y);
        // compute the tail intersection point with the edge line 
        var intermediatePoint = new $jit.Complex(arrowPoint.x - vect.x, arrowPoint.y - vect.y);
        // vector perpendicular to vect 
        var normal = new $jit.Complex(-vect.y / 2, vect.x / 2);
        var v1 = intermediatePoint.add(normal);
        var v2 = intermediatePoint.$add(normal.$scale(-1));

        if (newSynapse) {
            ctx.strokeStyle = "#222222";
            ctx.lineWidth = 2;
            ctx.globalAlpha = 0.4;
        }
        ctx.beginPath();
        ctx.moveTo(from.x, from.y);
        ctx.lineTo(to.x, to.y);
        ctx.stroke();
        ctx.beginPath();
        ctx.moveTo(v1.x, v1.y);
        ctx.lineTo(arrowPoint.x, arrowPoint.y);
        ctx.lineTo(v2.x, v2.y);
        ctx.stroke();
    }, // renderMidArrow
    renderEdgeArrows: function (edgeHelper, adj, synapse) {

        var self = Metamaps.JIT;

        var canvas = Metamaps.Visualize.mGraph.canvas;

        var directionCat = synapse.get('category');
        var direction = synapse.getDirection();

        var pos = adj.nodeFrom.pos.getc(true);
        var posChild = adj.nodeTo.pos.getc(true);

        //plot arrow edge 
        if (directionCat == "none") {
            edgeHelper.line.render({
                x: pos.x,
                y: pos.y
            }, {
                x: posChild.x,
                y: posChild.y
            }, canvas);
        } else if (directionCat == "both") {
            self.renderMidArrow({
                x: pos.x,
                y: pos.y
            }, {
                x: posChild.x,
                y: posChild.y
            }, 13, true, canvas, 0.7);
            self.renderMidArrow({
                x: pos.x,
                y: pos.y
            }, {
                x: posChild.x,
                y: posChild.y
            }, 13, false, canvas, 0.7);
        } else if (directionCat == "from-to") {
            var direction = adj.data.$direction;
            var inv = (direction && direction.length > 1 && direction[0] != adj.nodeFrom.id);
            self.renderMidArrow({
                x: pos.x,
                y: pos.y
            }, {
                x: posChild.x,
                y: posChild.y
            }, 13, inv, canvas, 0.7);
            self.renderMidArrow({
                x: pos.x,
                y: pos.y
            }, {
                x: posChild.x,
                y: posChild.y
            }, 13, inv, canvas, 0.3);
        }
    } //renderEdgeArrows
};