(function($){
    var row='odd';
    $.fn.weatherfeed=function(locations,options){
        var defaults={
            unit:'c',
            image:true,
            highlow:true,
            wind:true,
            link:true,
            showerror:true
        };

        var options=$.extend(defaults,options);
        return this.each(function(i,e){
            var $e=$(e);
            if(!$e.hasClass('weatherFeed'))$e.addClass('weatherFeed');
            if(!$.isArray(locations))return false;
            var count=locations.length;
            if(count>10)count=10;
            var locationid='';
            for(var i=0;i<count;i++){
                if(locationid!='')locationid+=',';
                locationid+="'"+locations[i]+"'";
            }
            now=new Date()
            var query="select * from weather.forecast where location in ("+locationid+") and u='"+options.unit+"'";
            var api='http://query.yahooapis.com/v1/public/yql?q='+encodeURIComponent(query)+'&rnd='+now.getFullYear()+now.getMonth()+now.getDay()+now.getHours()+'&format=json&callback=?';
            $.ajax({
                type:'GET',
                url:api,
                dataType:'json',
                success:function(data){
                    if(data.query){
                        if(data.query.results.channel.length>0){
                            var result=data.query.results.channel.length;
                            for(var i=0;i<result;i++){
                                _callback(e,data.query.results.channel[i],options);
                            }
                            }else{
                        _callback(e,data.query.results.channel,options);
                    }
                }else{
                if(options.showerror)$e.html('<p>Weather information unavailable</p>');
            }
            },
        error:function(data){
            if(options.showerror)$e.html('<p>Weather request failed</p>');
        }
        });
});
};

var _callback=function(e,feed,options){
    var $e=$(e);
    var wd=feed.wind.direction;
    if(wd>=348.75&&wd<=360){
        wd="N"
        };

    if(wd>=0&&wd<11.25){
        wd="N"
        };

    if(wd>=11.25&&wd<33.75){
        wd="NNE"
        };

    if(wd>=33.75&&wd<56.25){
        wd="NE"
        };

    if(wd>=56.25&&wd<78.75){
        wd="ENE"
        };

    if(wd>=78.75&&wd<101.25){
        wd="E"
        };

    if(wd>=101.25&&wd<123.75){
        wd="ESE"
        };

    if(wd>=123.75&&wd<146.25){
        wd="SE"
        };

    if(wd>=146.25&&wd<168.75){
        wd="SSE"
        };

    if(wd>=168.75&&wd<191.25){
        wd="S"
        };

    if(wd>=191.25&&wd<213.75){
        wd="SSW"
        };

    if(wd>=213.75&&wd<236.25){
        wd="SW"
        };

    if(wd>=236.25&&wd<258.75){
        wd="WSW"
        };

    if(wd>=258.75&&wd<281.25){
        wd="W"
        };

    if(wd>=281.25&&wd<303.75){
        wd="WNW"
        };

    if(wd>=303.75&&wd<326.25){
        wd="NW"
        };

    if(wd>=326.25&&wd<348.75){
        wd="NNW"
        };

    var wf=feed.item.forecast[0];
    wpd=feed.item.pubDate;
    n=wpd.indexOf(":");
    tpb=_getTimeAsDate(wpd.substr(n-2,8));
    tsr=_getTimeAsDate(feed.astronomy.sunrise);
    tss=_getTimeAsDate(feed.astronomy.sunset);
    if(tpb>tsr&&tpb<tss){
        daynight='d';
    }else{
        daynight='n';
    }
    var html='<div class="weatherItem '+row+'"';
    if(options.image)html+=' style="background-image: url(http://l.yimg.com/a/i/us/nws/weather/gr/'+feed.item.condition.code+daynight+'.png); background-repeat: no-repeat;"';
    html+='>';
    html+='<div class="weatherCity">'+feed.location.city+'</div>';
    html+='<div class="weatherTemp">'+feed.item.condition.temp+'&deg;</div>';
    html+='<div class="weatherDesc">'+feed.item.condition.text+'</div>';
    if(options.highlow)html+='<div class="weatherRange">High: '+wf.high+'&deg; Low: '+wf.low+'&deg;</div>';
    if(options.wind)html+='<div class="weatherWind">Wind: '+wd+' '+feed.wind.speed+feed.units.speed+'</div>';
    if(options.link)html+='<div class="weatherLink"><a href="'+feed.item.link+'">Read full forecast</a></div>';
    html+='</div>';
    if(row=='odd'){
        row='even';
    }else{
        row='odd';
    }
    $e.append(html);
};

var _getTimeAsDate=function(t){
    d=new Date();
    r=new Date(d.toDateString()+' '+t);
    return r;
};

})(jQuery);