IriSP.StackGraphWidget = function(Popcorn, config, Serializer) {

  IriSP.Widget.call(this, Popcorn, config, Serializer);

}

IriSP.StackGraphWidget.prototype = new IriSP.Widget();

IriSP.StackGraphWidget.prototype.draw = function() {

    var _ = IriSP._;

    this.height =  this._config.height || 50;

    this.width = this.selector.width();

    this.slices = this._config.slices || ~~(this.width/(this.streamgraph ? 20 : 5));

    _(this.tags).each(function(_a) {

        _a.regexp = new RegExp(_(_a.keywords).map(function(_k) {

            return _k.replace(/([\W])/gm,'\\$1');

        }).join("|"),"im")

    });

    this.paper = new Raphael(this.selector[0], this.width, this.height);

    this.groups = [];

    this.duration = this.getDuration();

    var _annotationType = this._serializer.getTweets(),

        _sliceDuration = ~~ ( this.duration / this.slices),

        _annotations = this._serializer._data.annotations,

        _groupedAnnotations = _(_.range(this.slices)).map(function(_i) {

            return _(_annotations).filter(function(_a){

                return (_a.begin <= (1 + _i) * _sliceDuration) && (_a.end >= _i * _sliceDuration)

            });

        }),

        _max = IriSP._(_groupedAnnotations).max(function(_g) {

            return _g.length

        }).length,

        _scale = this.height / _max,

        _width = this.width / this.slices,

        _showTitle = !this._config.excludeTitle,

        _showDescription = !this._config.excludeDescription;

    var _paths = _(this.tags).map(function() {

        return [];

    });

    _paths.push([]);

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

        var _group = _groupedAnnotations[i];

        if (_group) {

            var _vol = _(this.tags).map(function() {

                return 0;

            });

            for (var j = 0; j < _group.length; j++){

           var _txt = (_showTitle ? _group[j].content.title : '') + ' ' + (_showDescription ? _group[j].content.description : '')

                var _tags = _(this.tags).map(function(_tag) {

                        return (_txt.search(_tag.regexp) == -1 ? 0 : 1)

                    }),

                    _nbtags = _(_tags).reduce(function(_a,_b) {

                        return _a + _b;

                    }, 0);

                if (_nbtags) {

                    IriSP._(_tags).each(function(_v, _k) {

                        _vol[_k] += (_v / _nbtags);

                    });

                }

            }

            var _nbtags = _(_vol).reduce(function(_a,_b) {

                    return _a + _b;

                }, 0),

                _nbneutre = _group.length - _nbtags,

                _h = _nbneutre * _scale,

                _base = this.height - _h;

            if (!this.streamgraph) {

                this.paper.rect(i * _width, _base, _width - 1, _h ).attr({

                    "stroke" : "none",

                    "fill" : this.defaultcolor

                });

            }

           _paths[0].push(_base);

            for (var j = 0; j < this.tags.length; j++) {

                _h = _vol[j] * _scale;

                _base = _base - _h;

                if (!this.streamgraph) {

                    this.paper.rect(i * _width, _base, _width - 1, _h ).attr({

                        "stroke" : "none",

                        "fill" : this.tags[j].color

                    });

                }

                _paths[j+1].push(_base);

            }

            this.groups.push(_(_vol).map(function(_v) {

                return _v / _group.length;

            }))

        } else {

            for (var j = 0; j < _paths.length; j++) {

                _paths[j].push(this.height);

            }

            this.groups.push(_(this.tags).map(function() {

                return 0;

            }));

        }

    }

    if (this.streamgraph) {

        for (var j = _paths.length - 1; j >= 0; j--) {

            var _d = _(_paths[j]).reduce(function(_memo, _v, _k) {

               return _memo + ( _k

                   ? 'C' + (_k * _width) + ' ' + _paths[j][_k - 1] + ' ' + (_k * _width) + ' ' + _v + ' ' + ((_k + .5) * _width) + ' ' + _v

                   : 'M0 ' + _v + 'L' + (.5*_width) + ' ' + _v )

            },'') + 'L' + this.width + ' ' + _paths[j][_paths[j].length - 1] + 'L' + this.width + ' ' + this.height + 'L0 ' + this.height;

            this.paper.path(_d).attr({

                "stroke" : "none",

                "fill" : (j ? this.tags[j-1].color : this.defaultcolor)

            });

        }

    }

    this.rectangleFocus = this.paper.rect(0,0,_width,this.height)

        .attr({

            "stroke" : "none",

            "fill" : "#ff00ff",

            "opacity" : 0

        })

    this.rectangleProgress = this.paper.rect(0,0,0,this.height)

        .attr({

            "stroke" : "none",

            "fill" : "#808080",

            "opacity" : .3

        });

    this.ligneProgress = this.paper.path("M0 0L0 "+this.height).attr({"stroke":"#ff00ff", "line-width" : 2})

    this._Popcorn.listen("timeupdate", IriSP.wrap(this, this.timeUpdateHandler));

    var _this = this;

    this.selector

        .click(IriSP.wrap(this, this.clickHandler))

        .mousemove(function(_e) {

            _this.updateTooltip(_e);

            // Trace

            var relX = _e.pageX - _this.selector.offset().left;

            var _duration = _this.getDuration();

            var _time = parseInt((relX / _this.width) * _duration);

            _this._Popcorn.trigger("IriSP.TraceWidget.MouseEvents", {

                "widget" : "StackGraphWidget",

                "type": "mousemove",

                "x": _e.pageX,

                "y": _e.pageY,

                "time": _time

            });

        })

        .mouseout(function() {

            _this.TooltipWidget.hide();

            _this.rectangleFocus.attr({

                "opacity" : 0

            })

        })

}

IriSP.StackGraphWidget.prototype.timeUpdateHandler = function() {

    var _currentTime = this._Popcorn.currentTime(),

        _x = (1000 * _currentTime / this.duration) * this.width;

    this.rectangleProgress.attr({

        "width" : _x

    });

    this.ligneProgress.attr({

        "path" : "M" + _x + " 0L" + _x + " " + this.height

    })

}

IriSP.StackGraphWidget.prototype.clickHandler = function(event) {

  /* Ctrl-C Ctrl-V'ed from another widget

  */

  var relX = event.pageX - this.selector.offset().left;

  var newTime = ((relX / this.width) * this.duration/1000).toFixed(2);

  this._Popcorn.trigger("IriSP.StackGraphWidget.clicked", newTime);

  this._Popcorn.currentTime(newTime);                                 

};

IriSP.StackGraphWidget.prototype.updateTooltip = function(event) {

    var _segment = Math.max(0,Math.min(this.groups.length - 1, Math.floor(this.slices * (event.pageX - this.selector.offset().left)/this.width))),

        _valeurs = this.groups[_segment],

        _width = this.width / this.slices,

        _html = '<ul style="list-style: none; margin: 0; padding: 0;">' + IriSP._(this.tags).map(function(_tag, _i) {

            return '<li style="clear: both;"><span style="float: left; width: 10px; height: 10px; margin: 2px; background: '

                + _tag.color

                + ';"></span>'

                + ~~(100 * _valeurs[_i])

                + '% de '

                + _tag.description

                + '</li>';

        }).join('') + '</ul>';

    this.TooltipWidget._shown = false; // Vraiment, on ne peut pas ouvrir le widget s'il n'est pas encore ouvert ?

    this.TooltipWidget.show('','',(_segment + .5)* this.width / this.slices, 0);

    this.TooltipWidget.selector.find(".tip").html(_html);

    this.rectangleFocus.attr({

        "x" : _segment * _width,

        "opacity" : .4

    })

}