var config = new Object();
var start = 0;
var all_tags = [];
var tag_counts = [];
var cloud = new Object();

function glc(el)
{
    return (el.lastChild && el.lastChild.nodeName != '#text') ? glc(el.lastChild) : el
}

var params = glc(document.lastChild).getAttribute('src').replace(/.*\?/, '');

params = params.split("&");

for(var i=0; i<params.length; i++)
{
    var tmp = params[i].split("=");
    config[tmp[0]] = unescape(tmp[1]);
}

if(typeof(config.minsize) == 'undefined') config.minsize = '120';
if(typeof(config.maxsize) == 'undefined') config.maxsize = '280';

var url_base = ((typeof(config.url) == 'undefined') ?
    ('http://' + document.domain + '/') : ('http://' + config.url + '/'));

switch(config.css)
{
	case ('default'):
		document.write('<link rel="stylesheet" type="text/css" ' +
		    'href="http://tumblrtags.hr1v.com/default.css" />');
	break;
	case ('flickr'):
		document.write('<link rel="stylesheet" type="text/css" ' +
		    'href="http://tumblrtags.hr1v.com/flickr.css" />');
	break;
}

document.write(
    '<div id="tag_cloud">' + 
        '<div id="loading_tag_cloud">Loading tags...</div>' +
        '<ul id="tag_list"></ul>' + 
    '</div>'
);

$(document).ready(function()
{
    function sortNum(a, b) {return (a - b);}
    function sortByValue(keyArray, valueMap) {
        return keyArray.sort(function(a,b){return valueMap[a]-valueMap[b];});
    }
    function getProperties (obj) {
        var properties = [];
        for (var property in obj) properties.push(property);
        return properties;
    }
    
    function getTags() {
        $.getJSON(url_base+'api/read/json?callback=?&num=50&start='+start, function(data)
        {
            $(data.posts).each(function(i, post)
            {
        		$(post.tags).each(function(i, tag)
        		{
        			if(typeof(tag) == 'string') all_tags.push(tag);
        		});
            });
            if (start+50 < data['posts-total'])
            {
                start = start + 50;
                getTags();
            }
            else 
            {
                getCloud();
            }
        });
    }
    
    function getCloud()
    {
        $(all_tags).each(function(i, tag)
        {
            cloud[tag] = (cloud[tag] ? cloud[tag] + 1 : 1);
        });
        if(config.order == 'frequency') {
            var cloudSorted = new Object();
            var cloudKeys = getProperties(cloud);
            var sortedTags = sortByValue(cloudKeys, cloud).reverse();
            for (k in sortedTags) {
                cloudSorted[sortedTags[k]] = cloud[sortedTags[k]];
            }
            cloud = cloudSorted;
        }
        size_range = config.maxsize - config.minsize;
        for (j in cloud) tag_counts.push(cloud[j]);
        tag_counts.sort(sortNum);
        min_count = tag_counts[0];
        max_count = tag_counts[tag_counts.length - 1];
        slope = size_range / (max_count - min_count);
        count = 0
        for (tag in cloud)
        {
            count++;
            if(typeof(config.limit) != 'undefined' && 
                    config.limit != 'none' && 
                    count > config.limit) {
                break;
            }
            font_size = Math.round(slope*cloud[tag]-(slope*min_count-config.minsize));
            title = (cloud[tag] == 1 ? cloud[tag] + ' post' : cloud[tag] + ' posts');
            
            link = '<a href="'+url_base+'tagged/'+tag+'" title="'+title+'">'+tag+'</a>';
            
            output = '<li style="font-size:'+font_size+'%;">'+link+' </li>';
            $("#tag_list").append(output);
        }
        $("#loading_tag_cloud").html('');
    }
    
    getTags();
    
});