define(['jquery', 'underscore', 'requtils', 'renderer/baserepresentation'], function ($, _, requtils, BaseRepresentation) {

    'use strict';

    var Utils = requtils.getUtils();

    /* Edge Class Begin */

    //var Edge = Renderer.Edge = Utils.inherit(Renderer._BaseRepresentation);

    var Edge = Utils.inherit(BaseRepresentation);

    _(Edge.prototype).extend({

        _init: function() {

            this.renderer.edge_layer.activate();

            this.type = "Edge";

            this.hidden = false;

            this.ghost = false;

            this.from_representation = this.renderer.getRepresentationByModel(this.model.get("from"));

            this.to_representation = this.renderer.getRepresentationByModel(this.model.get("to"));

            this.bundle = this.renderer.addToBundles(this);

            this.line = new paper.Path();

            this.line.add([0,0],[0,0],[0,0]);

            this.line.__representation = this;

            this.line.strokeWidth = this.options.edge_stroke_width;

            this.arrow_scale = 1;

            this.arrow = new paper.Path();

            this.arrow.add(

                    [ 0, 0 ],

                    [ this.options.edge_arrow_length, this.options.edge_arrow_width / 2 ],

                    [ 0, this.options.edge_arrow_width ]

            );

            this.arrow.pivot = new paper.Point([ this.options.edge_arrow_length / 2, this.options.edge_arrow_width / 2 ]);

            this.arrow.__representation = this;

            this.text = $('<div class="Rk-Label Rk-Edge-Label">').appendTo(this.renderer.labels_$);

            this.arrow_angle = 0;

            if (this.options.editor_mode) {

                var Renderer = requtils.getRenderer();

                this.normal_buttons = [

                                       new Renderer.EdgeEditButton(this.renderer, null),

                                       new Renderer.EdgeRemoveButton(this.renderer, null)

                                       ];

                this.pending_delete_buttons = [

                                               new Renderer.EdgeRevertButton(this.renderer, null)

                                               ];

                this.all_buttons = this.normal_buttons.concat(this.pending_delete_buttons);

                for (var i = 0; i < this.all_buttons.length; i++) {

                    this.all_buttons[i].source_representation = this;

                }

                this.active_buttons = [];

            } else {

                this.active_buttons = this.all_buttons = [];

            }

            if (this.renderer.minimap) {

                this.renderer.minimap.edge_layer.activate();

                this.minimap_line = new paper.Path();

                this.minimap_line.add([0,0],[0,0]);

                this.minimap_line.__representation = this.renderer.minimap.miniframe.__representation;

                this.minimap_line.strokeWidth = 1;

            }

        },

        _getStrokeWidth: function() {

            var thickness = (this.model.has('style') && this.model.get('style').thickness) || 1;

            return this.options.edge_stroke_width + (thickness-1) * (this.options.edge_stroke_max_width - this.options.edge_stroke_width) / (this.options.edge_stroke_witdh_scale-1);

        },

        _getSelectedStrokeWidth: function() {

            var thickness = (this.model.has('style') && this.model.get('style').thickness) || 1;

            return this.options.selected_edge_stroke_width + (thickness-1) * (this.options.selected_edge_stroke_max_width - this.options.selected_edge_stroke_width) / (this.options.edge_stroke_witdh_scale-1);

        },

        _getArrowScale: function() {

            var thickness = (this.model.has('style') && this.model.get('style').thickness) || 1;

            return 1 + (thickness-1) * ((this.options.edge_arrow_max_width / this.options.edge_arrow_width) - 1) / (this.options.edge_stroke_witdh_scale-1);

        },

        redraw: function() {

            var from = this.model.get("from"),

            to = this.model.get("to");

            if (!from || !to || (this.hidden && !this.ghost)) {

                return;

            }

            this.from_representation = this.renderer.getRepresentationByModel(from);

            this.to_representation = this.renderer.getRepresentationByModel(to);

            if (typeof this.from_representation === "undefined" || typeof this.to_representation === "undefined" ||

                    (this.from_representation.hidden && !this.from_representation.ghost) ||

                    (this.to_representation.hidden && !this.to_representation.ghost)) {

                this.hide();

                return;

            }

            var _strokeWidth = this._getStrokeWidth(),

                _arrow_scale = this._getArrowScale(),

                _p0a = this.from_representation.paper_coords,

                _p1a = this.to_representation.paper_coords,

                _v = _p1a.subtract(_p0a),

                _r = _v.length,

                _u = _v.divide(_r),

                _ortho = new paper.Point([- _u.y, _u.x]),

                _group_pos = this.bundle.getPosition(this),

                _delta = _ortho.multiply( this.options.edge_gap_in_bundles * _group_pos ),

                _p0b = _p0a.add(_delta), /* Adding a 4 px difference */

                _p1b = _p1a.add(_delta), /* to differentiate bundled links */

                _a = _v.angle,

                _textdelta = _ortho.multiply(this.options.edge_label_distance + 0.5 * _arrow_scale * this.options.edge_arrow_width),

                _handle = _v.divide(3),

                _color = (this.model.has("style") && this.model.get("style").color) || (this.model.get("created_by") || Utils._USER_PLACEHOLDER(this.renkan)).get("color"),

                _dash = (this.model.has("style") && this.model.get("style").dash) ? this.options.default_dash_array : null,

                _opacity;

            if (this.model.get("delete_scheduled") || this.from_representation.model.get("delete_scheduled") || this.to_representation.model.get("delete_scheduled")) {

                _opacity = 0.5;

                this.line.dashArray = [2, 2];

            } else {

                _opacity = this.ghost ? this.options.ghost_opacity : 1;

                this.line.dashArray = null;

            }

            var old_act_btn = this.active_buttons;

            this.arrow.visible =

                (this.model.has("style") && this.model.get("style").arrow) ||

                !this.model.has("style") ||

                typeof this.model.get("style").arrow === 'undefined';

            this.active_buttons = this.model.get("delete_scheduled") ? this.pending_delete_buttons : this.normal_buttons;

            if (this.selected && this.renderer.isEditable() && old_act_btn !== this.active_buttons) {

                old_act_btn.forEach(function(b) {

                    b.hide();

                });

                this.active_buttons.forEach(function(b) {

                    b.show();

                });

            }

            this.paper_coords = _p0b.add(_p1b).divide(2);

            this.line.strokeWidth = _strokeWidth;

            this.line.strokeColor = _color;

            this.line.dashArray = _dash;

            this.line.opacity = _opacity;

            this.line.segments[0].point = _p0a;

            this.line.segments[1].point = this.paper_coords;

            this.line.segments[1].handleIn = _handle.multiply(-1);

            this.line.segments[1].handleOut = _handle;

            this.line.segments[2].point = _p1a;

            this.arrow.scale(_arrow_scale / this.arrow_scale);

            this.arrow_scale = _arrow_scale;

            this.arrow.fillColor = _color;

            this.arrow.opacity = _opacity;

            this.arrow.rotate(_a - this.arrow_angle, this.arrow.bounds.center);

            this.arrow.position = this.paper_coords;

            this.arrow_angle = _a;

            if (_a > 90) {

                _a -= 180;

                _textdelta = _textdelta.multiply(-1);

            }

            if (_a < -90) {

                _a += 180;

                _textdelta = _textdelta.multiply(-1);

            }

            var _text = this.model.get("title") || this.renkan.translate(this.options.label_untitled_edges) || "";

            _text = Utils.shortenText(_text, this.options.node_label_max_length);

            this.text.text(_text);

            var _textpos = this.paper_coords.add(_textdelta);

            this.text.css({

                left: _textpos.x,

                top: _textpos.y,

                transform: "rotate(" + _a + "deg)",

                "-moz-transform": "rotate(" + _a + "deg)",

                "-webkit-transform": "rotate(" + _a + "deg)",

                opacity: _opacity

            });

            this.text_angle = _a;

            var _pc = this.paper_coords;

            this.all_buttons.forEach(function(b) {

                b.moveTo(_pc);

            });

            if (this.renderer.minimap) {

                this.minimap_line.strokeColor = _color;

                this.minimap_line.segments[0].point = this.renderer.toMinimapCoords(new paper.Point(this.from_representation.model.get("position")));

                this.minimap_line.segments[1].point = this.renderer.toMinimapCoords(new paper.Point(this.to_representation.model.get("position")));

            }

        },

        hide: function(){

            this.hidden = true;

            this.ghost = false;

            this.text.hide();

            this.line.visible = false;

            this.arrow.visible = false;

            this.minimap_line.visible = false;

        },

        show: function(ghost){

            this.ghost = ghost;

            if (this.ghost) {

                this.text.css('opacity', 0.3);

                this.line.opacity = 0.3;

                this.arrow.opacity = 0.3;

                this.minimap_line.opacity = 0.3;

            } else {

                this.hidden = false;

                this.text.css('opacity', 1);

                this.line.opacity = 1;

                this.arrow.opacity = 1;

                this.minimap_line.opacity = 1;

            }

            this.text.show();

            this.line.visible = true;

            this.arrow.visible = true;

            this.minimap_line.visible = true;

            this.redraw();

        },

        openEditor: function() {

            this.renderer.removeRepresentationsOfType("editor");

            var _editor = this.renderer.addRepresentation("EdgeEditor",null);

            _editor.source_representation = this;

            _editor.draw();

        },

        select: function() {

            this.selected = true;

            this.line.strokeWidth = this._getSelectedStrokeWidth();

            if (this.renderer.isEditable()) {

                this.active_buttons.forEach(function(b) {

                    b.show();

                });

            }

            if (!this.options.editor_mode) {

                this.openEditor();

            }

            this._super("select");

        },

        unselect: function(_newTarget) {

            if (!_newTarget || _newTarget.source_representation !== this) {

                this.selected = false;

                if (this.options.editor_mode) {

                    this.all_buttons.forEach(function(b) {

                        b.hide();

                    });

                }

                if (this.hidden){

                    this.renderer.removeRepresentationsOfType("editor");

                }

                this.line.strokeWidth = this._getStrokeWidth();

                this._super("unselect");

            }

        },

        mousedown: function(_event, _isTouch) {

            if (_isTouch) {

                this.renderer.unselectAll();

                this.select();

            }

        },

        mouseup: function(_event, _isTouch) {

            if (!this.renkan.read_only && this.renderer.is_dragging) {

                this.from_representation.saveCoords();

                this.to_representation.saveCoords();

                this.from_representation.is_dragging = false;

                this.to_representation.is_dragging = false;

            } else {

                if (!_isTouch) {

                    this.openEditor();

                }

                this.model.trigger("clicked");

            }

            this.renderer.click_target = null;

            this.renderer.is_dragging = false;

        },

        paperShift: function(_delta) {

            if (this.options.editor_mode) {

                if (!this.options.read_only) {

                    this.from_representation.paperShift(_delta);

                    this.to_representation.paperShift(_delta);

                }

            } else {

                this.renderer.paperShift(_delta);

            }

        },

        destroy: function() {

            this._super("destroy");

            this.line.remove();

            this.arrow.remove();

            this.text.remove();

            if (this.renderer.minimap) {

                this.minimap_line.remove();

            }

            this.all_buttons.forEach(function(b) {

                b.destroy();

            });

            var _this = this;

            this.bundle.edges = _.reject(this.bundle.edges, function(_edge) {

                return _this === _edge;

            });

        }

    }).value();

    return Edge;

});