IriSP.Widgets.Tagcloud = function(player, config) {

    IriSP.Widgets.Widget.call(this, player, config);

    this.stopwords = IriSP._.uniq([].concat(this.custom_stopwords).concat(this.stopword_lists[this.stopword_language]));

}

IriSP.Widgets.Tagcloud.prototype = new IriSP.Widgets.Widget();

IriSP.Widgets.Tagcloud.prototype.template =

    '<div class="Ldt-Tagcloud-Container"><ul class="Ldt-Tagcloud-List">'

    + '{{#words}}<li class="Ldt-Tagcloud-item Ldt-TraceMe" trace-info="tag:{{word}}" content="{{word}}" style="font-size: {{size}}px">{{word}}</li>{{/words}}'

    + '</ul></div>';

IriSP.Widgets.Tagcloud.prototype.defaults = {

    include_titles: true,

    include_descriptions: true,

    include_tag_texts: true,

    tag_count: 30,

    stopword_language: "fr",

    custom_stopwords: [],

    exclude_pattern: false,

    annotation_type: false,

    segment_annotation_type: false,

    min_font_size: 10,

    max_font_size: 26

}

IriSP.Widgets.Tagcloud.prototype.stopword_lists = {

    "fr" : [

        'aussi', 'avec', 'aux', 'bien', 'car', 'cette', 'comme', 'dans', 'des', 'donc', 'dont', 'elle', 'encore', 'entre', 'est',

        'être', 'eux', 'faire', 'fait', 'http', 'ici', 'ils', 'les', 'leur', 'leurs', 'mais', 'mes', 'même', 'mon', 'notre',

        'non', 'nos', 'nous', 'ont', 'par', 'pas', 'peu', 'peut', 'plus', 'pour', 'quand', 'que', 'qui', 'quoi', 'sans',

        'ses' ,'son', 'sont', 'sur', 'tes', 'très', 'the', 'ton', 'tous', 'tout', 'une', 'votre', 'vos', 'vous'

    ],

    "en" : [

        'about', 'again', 'are', 'and', 'because', 'being', 'but', 'can', 'done', 'have', 'for', 'from',

        'get', 'here', 'http', 'like', 'more', 'one', 'our', 'she', 'that', 'the', 'their', 'then', 'there',

        'they', 'this', 'very', 'what', 'when', 'where', 'who', 'why', 'will', 'with', 'www', 'you', 'your'

    ]

}

IriSP.Widgets.Tagcloud.prototype.draw = function() {

    this.bindPopcorn("IriSP.search", "onSearch");

    this.bindPopcorn("IriSP.search.closed", "onSearch");

    this.bindPopcorn("IriSP.search.cleared", "onSearch");

    if (this.segment_annotation_type) {

        this.bindPopcorn("timeupdate","onTimeupdate");

    } else {

        this.redraw();

    }

}

IriSP.Widgets.Tagcloud.prototype.onTimeupdate = function() {

    var _time = Math.floor(this.player.popcorn.currentTime() * 1000),

        _list = this.source.getAnnotationsByTypeTitle(this.segment_annotation_type).filter(function(_annotation) {

            return _annotation.begin <= _time && _annotation.end > _time;

        });

    if (_list.length) {

        if (_list[0].begin !== this.begin_time || _list[0].end !== this.end_time) {

            this.begin_time = _list[0].begin;

            this.end_time = _list[0].end;

            this.redraw();

        }

    }

}

IriSP.Widgets.Tagcloud.prototype.redraw = function() {

    var _urlRegExp = /https?:\/\/[0-9a-zA-Z\.%\/-_]+/g,

        _regexpword = /[^\s\.&;,'"!\?\d\(\)\+\[\]\\\…\-«»:\/]{3,}/g,

        _words = {},

        _this = this,

        _annotations = this.getWidgetAnnotations();

    if (typeof this.begin_time !== "undefined" && typeof this.end_time !== "undefined") {

        _annotations = _annotations.filter(function(_annotation) {

            return _annotation.begin >= _this.begin_time && _annotation.end <= _this.end_time;

        })

    }

    _annotations.forEach(function(_annotation) {

       var _txt =

            (_this.include_titles ? _annotation.title : '')

            + ' '

            + (_this.include_descriptions ? _annotation.description : '')

            + ' '

            + (_this.include_tag_texts ? _annotation.getTagTexts() : '');

       IriSP._(_txt.toLowerCase().replace(_urlRegExp, '').match(_regexpword)).each(function(_word) {

           if (IriSP._(_this.stopwords).indexOf(_word) == -1 && (!_this.exclude_pattern || !_this.exclude_pattern.test(_word))) {

               _words[_word] = 1 + (_words[_word] || 0);

           }

       })

    });

    _words = IriSP._(_words)

        .chain()

        .map(function(_v, _k) {

            return {

                "word" : _k,

                "count" : _v

            }

        })

        .filter(function(_v) {

            return _v.count > 2;

        })

        .sortBy(function(_v) {

            return - _v.count;

        })

        .first(this.tag_count)

        .value();

    if (_words.length) {

        var _max = _words[0].count,

            _min = Math.min(_words[_words.length - 1].count, _max - 1),

            _scale = (this.max_font_size - this.min_font_size) / Math.sqrt(_max - _min);

        IriSP._(_words).each(function(_word) {

                _word.size = Math.floor( _this.min_font_size + _scale * Math.sqrt(_word.count - _min) );

            });

    }

    this.$.html(Mustache.to_html(this.template,  {words: _words }));

    this.$.find(".Ldt-Tagcloud-item").click(function() {

        var _txt = IriSP.jQuery(this).attr("content");

        _this.player.popcorn.trigger("IriSP.search.triggeredSearch", _txt);

    });

}

IriSP.Widgets.Tagcloud.prototype.onSearch = function(searchString) {

    searchString = typeof searchString !== "undefined" ? searchString : '';

    if (searchString) {

        var _rgxp = IriSP.Model.regexpFromTextOrArray(searchString);

    }

    this.$.find(".Ldt-Tagcloud-item").each(function() {

        var _el = IriSP.jQuery(this),

            _txt = _el.attr("content");

        if (searchString) {

            _el.html(_txt.replace(_rgxp, '<span class="Ldt-Tagcloud-active">$1</span>'));

        } else {

            _el.html(_txt);

        }

    });

}