/*
 * Easy Retweet Button
 * http://ejohn.org/blog/retweet/
 *   by John Resig (ejohn.org)
 *
 * Licensed under the MIT License:
 * http://www.opensource.org/licenses/mit-license.php
 */

(function(){

window.RetweetJS = {
  // Your Bit.ly Username
  bitly_user: "thestranger",

  // Your Bit.ly API Key
  // Found here: http://bit.ly/account
  bitly_key: "R_93929779ad9fcd0df003847b4766acdd",

  // The text to replace the links with
  link_text: (/windows/i.test( navigator.userAgent) ? "" : "") +
    " ",

  // What # to show (Use "clicks" for # of clicks or "none" for nothing)
  count_type: "none",

  // Tweet Prefix text
  // "RT @jeresig " would result in: "RT @jeresig Link Title http://bit.ly/asdf"
  prefix: "",

  // Style information
  styling: "a.retweet { border: 0px; }" +
    "a.retweet span { color: #FFF; background: transparent url(/images/icons/twitter-icon.gif) no-repeat top left; height: 16px; width: 16px; display: block; margin-right: 8px; float: left; }" +
    "a.vert { display: block; text-align: center; font-size: 16px; float: left; margin: 4px; }" +
    "a.retweet strong.vert { display: block; background: transparent url(/images/icons/twitter-icon.gif) no-repeat top left; height: 16px; width: 16px; }" +
    "a.retweet span.vert { display: block; background: transparent url(/images/icons/twitter-icon.gif) no-repeat top left; height: 16px; width: 16px; }"
};

//////////////// No Need to Configure Below Here ////////////////

var loadCount = 1;

// Asynchronously load the Bit.ly JavaScript API
// If it hasn't been loaded already
if ( typeof BitlyClient === "undefined" ) {
  var head = document.getElementsByTagName("head")[0] ||
    document.documentElement;
  var script = document.createElement("script");
  script.src = "http://bit.ly/javascript-api.js?version=latest&login=" +
    RetweetJS.bitly_user + "&apiKey=" + RetweetJS.bitly_key;
  script.charSet = "utf-8";
  head.appendChild( script );

  var check = setInterval(function(){
    if ( typeof BitlyCB !== "undefined" ) {
      clearInterval( check );
      head.removeChild( script );
      loaded();
    }
  }, 10);

  loadCount = 0;
}

if ( document.addEventListener ) {
  document.addEventListener("DOMContentLoaded", loaded, false);

} else if ( window.attachEvent ) {
  window.attachEvent("onload", loaded);
}

function loaded(){
  // Need to wait for doc ready and js ready
  if ( ++loadCount < 2 ) {
    return;
  }

  var elems = [], urlElem = {}, hashURL = {};

  BitlyCB.shortenResponse = function(data) {
    for ( var url in data.results ) {
      var hash = data.results[url].userHash;
      hashURL[hash] = url;

      var elems = urlElem[ url ];

      for ( var i = 0; i < elems.length; i++ ) {
        elems[i].href += hash;
      }

      if ( RetweetJS.count_type === "clicks" ) {
        BitlyClient.stats(hash, 'BitlyCB.statsResponse');
      }
    }
  };

  BitlyCB.statsResponse = function(data) {
    var clicks = data.results.clicks, hash = data.results.userHash;
    var url = hashURL[ hash ], elems = urlElem[ url ];

    if ( clicks > 0 ) {
      for ( var i = 0; i < elems.length; i++ ) {
        var strong = document.createElement("strong");
        strong.appendChild( document.createTextNode( clicks + " " ) );
        elems[i].insertBefore(strong, elems[i].firstChild);

        if ( /(^|\s)vert(\s|$)/.test( elems[i].className ) ) {
          elems[i].firstChild.className = elems[i].lastChild.className = "vert";
        }
      }
    }

    hashURL[ hash ] = urlElem[ url ] = null;
  };

  if ( document.getElementsByClassName ) {
    elems = document.getElementsByClassName("retweet");
  } else {
    var tmp = document.getElementsByTagName("a");
    for ( var i = 0; i < tmp.length; i++ ) {
      if ( /(^|\s)retweet(\s|$)/.test( tmp[i].className ) ) {
        elems.push( tmp[i] );
      }
    }
  }

  if ( elems.length && RetweetJS.styling ) {
    var style = document.createElement("style");
    style.type = "text/css";

    try {
      style.appendChild( document.createTextNode( RetweetJS.styling ) );
    } catch (e) {
      if ( style.styleSheet ) {
        style.styleSheet.cssText = RetweetJS.styling;
      }
    }

    document.body.appendChild( style );
  }

  for ( var i = 0; i < elems.length; i++ ) {
    var elem = elems[i];

    if ( /(^|\s)self(\s|$)/.test( elem.className ) ) {
      elem.href = window.location;
      elem.title = document.title;
    }

    var origText = elem.title || elem.textContent || elem.innerText,
      href = elem.href;

    elem.innerHTML = "<span>" + RetweetJS.link_text + "</span>";
    elem.title = "";
    elem.href = "http://twitter.com/home?status=" +
      encodeURIComponent(RetweetJS.prefix + origText + " http://bit.ly/");

    if ( urlElem[ href ] ) {
      urlElem[ href ].push( elem );
    } else {
      urlElem[ href ] = [ elem ];
      BitlyClient.shorten(href, 'BitlyCB.shortenResponse');
    }
  }

}

})();