/**
 * remy sharp / http://remysharp.com
 * http://remysharp.com/2007/05/18/add-twitter-to-your-blog-step-by-step/
 *
 * @license MIT
 * @version 1.11 - Added timeout functionality, and removed withFriends while Twitter works out API changes
 * @date $Date: 2008-05-31 14:26:49 +0100 (Sat, 31 May 2008) $
 */

// to protect variables from resetting if included more than once
if (typeof renderTwitters != 'function') (function () {
  /** Private variables */
  var browser = (function() {
    var b = navigator.userAgent.toLowerCase();

    // Figure out what browser is being used
    return {
      safari: /webkit/.test(b),
      opera: /opera/.test(b),
      msie: /msie/.test(b) && !(/opera/).test(b),
      mozilla: /mozilla/.test(b) && !(/(compatible|webkit)/).test(b)
    };
  })();

  var guid = 0;
  var readyList = [];
  var isReady = false;

  /** Global functions */

  // to create a public function within our private scope, we attach the
  // the function to the window object
  window.renderTwitters = function (obj, options) {
    // private shortcuts
    function node(e) {
      return document.createElement(e);
    }

    function text(t) {
      return document.createTextNode(t);
    }

    var target = document.getElementById(options.twitterTarget);
    var data = null;
    var ul = node('ul'), li, statusSpan, timeSpan, i, max = obj.length > options.count ? options.count : obj.length;

    for (i = 0; i < max && obj[i]; i++) {
      data = getTwitterData(obj[i]);

      if (options.ignoreReplies && obj[i].text.substr(0, 1) == '@') {
        max++;
        continue; // skip
      }

      li = node('li');

      if (options.template) {
        li.innerHTML = options.template.replace(/%([a-z_\-\.]*)%/ig, function (m, l) {
          var r = data[l] + "" || "";
            if (l == 'text' && options.enableLinks) r = linkify(r);
              return r;
          });
      } else {
        statusSpan = node('span');
        statusSpan.className = 'twitterStatus';
        timeSpan = node('span');
        timeSpan.className = 'twitterTime';
        statusSpan.innerHTML = obj[i].text; // forces the entities to be converted correctly

        if (options.enableLinks == true) {
          statusSpan.innerHTML = linkify(statusSpan.innerHTML);
        }

        timeSpan.innerHTML = relative_time(obj[i].created_at);

        if (options.prefix) {
          var s = node('span');
          s.className = 'twitterPrefix';
          s.innerHTML = options.prefix.replace(/%(.*?)%/g, function (m, l) {
            return obj[i].user[l];
          });
          li.appendChild(s);
          li.appendChild(text(' ')); // spacer :-(
        }

        li.appendChild(statusSpan);
        li.appendChild(text(' '));
        li.appendChild(timeSpan);
      }

      ul.appendChild(li);
    }

    if (options.clearContents) {
      while (target.firstChild) {
        target.removeChild(target.firstChild);
      }
    }

    target.appendChild(ul);
  };

  window.getTwitters = function (target, id, count, options) {
    guid++;

    if (typeof id == 'object') {
      options = id;
      id = options.id;
      count = options.count;
    }

    // defaulting options
    if (!count) count = 1;

    if (options) {
      options.count = count;
    } else {
      options = {};
    }

    if (!options.timeout && typeof options.onTimeout == 'function') {
      options.timeout = 10;
    }

    if (typeof options.clearContents == 'undefined') {
      options.clearContents = true;
    }

    // Hack to disable withFriends, twitter changed their API so this requires auth
    // http://getsatisfaction.com/twitter/topics/friends_timeline_api_call_suddenly_requires_auth
    if (options.withFriends) options.withFriends = false;

    // need to make these global since we can't pass in to the twitter callback
    options['twitterTarget'] = target;

    // default enable links
    if (typeof options.enableLinks == 'undefined') options.enableLinks = true;

    // this looks scary, but it actually allows us to have more than one twitter
    // status on the page, which in the case of my example blog - I do!
    window['twitterCallback' + guid] = function (obj) {
      if (options.timeout) {
        clearTimeout(window['twitterTimeout' + guid]);
      }
      renderTwitters(obj, options);
    };

    // check out the mad currying!
    ready((function(options, guid) {
      return function () {
        // if the element isn't on the DOM, don't bother
        if (!document.getElementById(options.twitterTarget)) {
          return;
        }

        var url = 'http://www.twitter.com/statuses/' + (options.withFriends ? 'friends_timeline' : 'user_timeline') + '/' + id + '.json?callback=twitterCallback' + guid + '&count=20';

        if (options.timeout) {
          window['twitterTimeout' + guid] = setTimeout(function () {
            // cancel callback
            if (options.onTimeoutCancel) window['twitterCallback' + guid] = function () {};
            options.onTimeout.call(document.getElementById(options.twitterTarget));
          }, options.timeout);
        }

        var script = document.createElement('script');
        script.setAttribute('src', url);
        document.getElementsByTagName('head')[0].appendChild(script);
      };
    })(options, guid));
  };

  // GO!
  DOMReady();

  /** Private functions */
  function getTwitterData(orig) {
    var data = orig, i;
    for (i in orig.user) {
      data['user_' + i] = orig.user[i];
    }

    data.time = relative_time(orig.created_at);

    return data;
  }

  function ready(callback) {
    if (!isReady) {
      readyList.push(callback);
    } else {
      callback.call();
    }
  }

  function fireReady() {
    isReady = true;
    var fn = readyList.shift();
    while (fn) {
      fn.call();
      fn = readyList.shift();
    }
  }

  // ready and browser adapted from John Resig's jQuery library (http://jquery.com)
  function DOMReady() {
    if ( browser.mozilla || browser.opera ) {
      document.addEventListener( "DOMContentLoaded", fireReady, false );
    }
    else if ( browser.msie ) {
      // If IE is used, use the excellent hack by Matthias Miller
      // http://www.outofhanwell.com/blog/index.php?title=the_window_onload_problem_revisited

      // Only works if you document.write() it
      document.write("<scr" + "ipt id=__ie_init defer=true src=//:><\/script>");

      // Use the defer script hack
      var script = document.getElementById("__ie_init");

      // script does not exist if jQuery is loaded dynamically
      if (script) {
        script.onreadystatechange = function() {
          if ( this.readyState != "complete" ) return;
          this.parentNode.removeChild( this );
          fireReady.call();
        };
      }

      // Clear from memory
      script = null;
    }
    // If Safari  is used
    else if ( browser.safari ) {
      // Continually check to see if the document.readyState is valid
      var safariTimer = setInterval(function () {
        // loaded and complete are both valid states
        if ( document.readyState == "loaded" ||
        document.readyState == "complete" ) {
          // If either one are found, remove the timer
          clearInterval( safariTimer );
          safariTimer = null;
          // and execute any waiting functions
          fireReady.call();
        }
      }, 10);
    }
  }

  function relative_time(time_value) {
    var values = time_value.split(" ");
    time_value = values[1] + " " + values[2] + ", " + values[5] + " " + values[3];
    var parsed_date = Date.parse(time_value);
    var relative_to = (arguments.length > 1) ? arguments[1] : new Date();
    var delta = parseInt((relative_to.getTime() - parsed_date) / 1000);
    delta = delta + (relative_to.getTimezoneOffset() * 60);

    var r = '';
    if (delta < 60) {
      r = 'il y a moins d\'une minute';
    } else if(delta < 120) {
      r = 'il y a une minute';
    } else if(delta < (45*60)) {
      r = 'il y a ' + (parseInt(delta / 60)).toString() + ' minutes';
    } else if(delta < (2*90*60)) { // 2* because sometimes read 1 hours ago
      r = 'il y a une heure';
    } else if(delta < (24*60*60)) {
      r = 'il y a ' + (parseInt(delta / 3600)).toString() + ' heures';
    } else if(delta < (48*60*60)) {
      r = 'il y a un jour';
    } else {
      r = 'il y a ' + (parseInt(delta / 86400)).toString() + ' jours';
    }

    return r;
  }

  function linkify(s) {
    return s.replace(/[A-Za-z]+:\/\/[A-Za-z0-9-_]+\.[A-Za-z0-9-_:%&\?\/.=]+/g, function(m) {
      return m.link(m);
    }).replace(/@[\S]+/g, function(m) {
      return '<a href="http://twitter.com/' + m.substr(1) + '">' + m + '</a>';
    });
  }
})();