/*!
* hURL (hash URL) v1.2
* by Makis Tracend (makis@makesit.es)
*
* Parses the hash URL and attaches an object to the body tag
* with its properties for easy retrieval/update
*
* Dual licensed under the MIT or GPL Version 2 licenses.
* http://jquery.org/license
*
*
* TIPS:
*
* Initiate hURL just by adding
* $.hurl();
*
* Update the hash URL with data queries, ex.
* $.hurl("update", {"id": 15765});
*
* Get the latest link by requesting
* $("body").data("hurl").link
*
* Update your page when the hash gets updated by using monitor:true
* and setting up an event listener, like this:
* $("body").bind('hurl', function(event) {
* // do something...
* });
*
*/

(function( $ ){

$.hurl = function( method, options ){
$('body').hurl( method, options );
};

  //var hash = location.hash;

  var methods = {
     init : function( options ) {

var settings = {
'delimiter' : "/",
'initiator' : "!",
'pair' : true,
'monitor' : true,
'meta' : true
};

return this.each(function() {

var $this = $(this),
data = $this.data('hurl');

// stop all operations if location.hash is not available in the browser
if( typeof location.hash != "undefined" ){

// merging custom options with default settings
if ( options ) {
$.extend( settings, options );
}
// save settings
$this.data('hurl', {settings: settings, link: {}, meta: {}});

// parse hash uri
$this.hurl("parse");

if( settings.monitor ){
// start monitoring the hash events
$this.hurl("monitor");
}

if( settings.meta ){
$("body").bind('hurl', function(event) {
$this.hurl("meta");
});
}

} else {
return false;
}

     });

},

// pase the URL on page load
parse : function( options ) {
return this.each(function(){

var $this = $(this),
data = $this.data('hurl'),
settings = data.settings;

var link = {};
var hash = location.hash;

// see if there is an initiator (default: !)
if( hash.indexOf(settings.initiator) ){
// get the pure URI
var uri = hash.substr( hash.indexOf(settings.initiator)+1 );
var uri_parts = uri.split(settings.delimiter);
}

// FIX -- Remove first element if blank
if(uri_parts[0]=="") { uri_parts.shift() }

// parse in key-value pairs
if( settings.pair ){
for(i in uri_parts){
//link[i] = uri_parts[i];
// odd numbers are keys, values are even numbers
if( i%2 ){
// register the value to the previous key
link[uri_parts[i-1]] = uri_parts[i];
} else {
// register the key
link[uri_parts[i]] = 1;
}
}
} else {
for(i in uri_parts){
link[i] = uri_parts[i];
}
}

// merge with the existing link object
$.extend(data.link, link);

// save url for future reference
$this.data('hurl', data);


});
},

monitor : function( options ) {
return this.each(function(){

var $this = $(this),
data = $this.data('hurl');

// save the current link
var url = methods.create( $this );

// get the new link
if ( url != location.hash ) {
$this.hurl("parse");
// trigger the update for all scripts listening
$this.trigger("hurl", "auto");
}

// use settimeout for now...
setTimeout( function(){ $this.hurl("monitor") }, 500);

});
},

request : function( link, meta ) {
return this.each(function(){

var $this = $(this),
data = $this.data('hurl');

if ( link ) {
data.link = link;
}

if ( meta ) {
$.extend( data.meta, meta );
}

// save data
$this.data('hurl', data);

// further actions
if ( link ) {

// register click
$this.hurl("register");

// trigger the update for all scripts listening
$this.trigger("hurl", "request");
}

});
},

update : function( link, meta ) {
return this.each(function(){

var $this = $(this),
data = $this.data('hurl');

if ( link ) {
$.extend( data.link, link );
}

if ( meta ) {
$.extend( data.meta, meta );
}

// save data
$this.data('hurl', data);

// further actions
if ( link ) {

// register click
$this.hurl("register");

// trigger the update for all scripts listening
$this.trigger("hurl", "update");
}

});
},

register : function( ) {
return this.each(function(){

var $this = $(this),
data = $this.data('hurl');

// stingify link
var url = methods.create( $this );
// register the click in the browser's history
$a = $('<a><!-- --></a>').attr("href", url).css({
position:'absolute',
top: $(window).scrollTop(),
left: $(window).scrollLeft()
});
$('body').prepend($a);
location = url;
$a.remove();

});
},

meta : function( ) {
return this.each(function(){

var $this = $(this),
             data = $this.data('hurl');

$("meta[property='og:title']").attr("content", document.title);
$("meta[property='og:url']").attr("content", document.location.href);
// $("meta[property='og:description']").attr("content", ...);
});
},

destroy : function( ) {
return this.each(function(){

var $this = $(this),
             data = $this.data('hurl');
// unbind the mouse scroll
// * condition?
data.hurl.remove();
          $this.removeData('hurl');

});
},
// helper functions
create : function( $this ) {

var data = $this.data('hurl'),
settings = data.settings;

var url = "#"+settings.initiator;

// parse in key-value pairs
if( settings.pair ){
for(i in data.link){
url += settings.delimiter + i + settings.delimiter + data.link[i];
}
} else {
for(i in data.link){
url += settings.delimiter + data.link[i];
}
}

return url;
}

  };

  $.fn.hurl = function( method ) {

    if ( methods[method] ) {
      return methods[method].apply( this, Array.prototype.slice.call( arguments, 1 ));
    } else if ( typeof method === 'object' || ! method ) {
      return methods.init.apply( this, arguments );
    } else {
      $.error( 'Method ' + method + ' does not exist on jQuery.hurl' );
    }

  };

})( jQuery );