// to protect variables from resetting if included more than once
if (typeof renderTwitters != 'function') (function () {
    /** Private variables */
    
    // only used for the DOM ready, since IE & Safari require special conditions
    var browser = (function() {
        var b = navigator.userAgent.toLowerCase();
 
        // Figure out what browser is being used
        return {
            webkit: /(webkit|khtml)/.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;
    
    var monthDict = ['jan', 'feb', 'mrt', 'apr', 'mei', 'jun', 'jul', 'aug', 'sep', 'okt', 'nov', 'dec'];
    
    /** Global functions */
    
    // based on Dustin Diaz's ify, but with my fixes :-)
    window.ify = function() {
      var entities = {
          '"' : '"',
          '&' : '&',
          '<' : '&lt;',
          '>' : '&gt;'
      };
 
      return {
        "link": function(t) {
          return t.replace(/[a-z]+:\/\/[a-z0-9-_]+\.[a-z0-9-_:~%&\?\/.=]+[^:\.,\)\s*$]/ig, function(m) {
            return '<a href="' + m + '">' + ((m.length > 25) ? m.substr(0, 24) + '...' : m) + '</a>';
          });
        },
        "at": function(t) {
          return t.replace(/(^|[^\w]+)\@([a-zA-Z0-9_]{1,15}(\/[a-zA-Z0-9-_]+)*)/g, function(m, m1, m2) {
            return m1 + '@<a href="http://twitter.com/' + m2 + '">' + m2 + '</a>';
          });
        },
        "hash": function(t) {
          return t.replace(/(^|[^&\w'"]+)\#([a-zA-Z0-9_]+)/g, function(m, m1, m2) {
            return m1 + '#<a href="http://search.twitter.com/search?q=%23' + m2 + '">' + m2 + '</a>';
          });
        },
        "clean": function(tweet) {
          return this.hash(this.at(this.link(tweet)));
        }
      };
    }();


    // to create a public function within our private scope, we attach the 
    // the function to the window object
    window.renderTwitters = function (obj, options) {
        var target = document.getElementById(options.twitterTarget);

        if (options.clearContents) {
                target.innerHTML = '';
        }

        var data, 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
            }

                target.innerHTML += options.template.replace(/%([a-z_\-\.]*)%/ig, function (m, l) {
                    var r = data[l] + "" || "";
                    if (l == 'text' && options.enableLinks) r = ify.clean(r);
                    return r;
                });
        }

        if (typeof options.callback == 'function') {
            options.callback();
        }
    };
    
    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&cb=' + Math.random();
 
                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 * 1000);
                }
                
                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;
        while (fn = readyList.shift()) {
            fn.call();
        }
    }
 
    // ready and browser adapted from John Resig's jQuery library (http://jquery.com)
    function DOMReady() {
        if ( document.addEventListener && !browser.webkit ) {
            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;
 
        } else if ( browser.webkit ) {
            // 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(" "),
            parsed_date = Date.parse(values[1] + " " + values[2] + ", " + values[5] + " " + values[3]),
            date = new Date(parsed_date),
            relative_to = (arguments.length > 1) ? arguments[1] : new Date(),
            delta = parseInt((relative_to.getTime() - parsed_date) / 1000),
            r = '';
        
        function formatTime(date) {
            var hour = date.getHours(),
                min = date.getMinutes() + "",
                ampm = 'AM';
                        
            if (min.length == 1) {
                min = '0' + min;
            }
            
            return hour + ':' + min;
        }
        
        function formatDate(date) {
            var ds = date.toDateString().split(/ /),
                mon = monthDict[date.getMonth()],
                day = date.getDate()+'',
                dayi = parseInt(day),
                year = date.getFullYear(),
                thisyear = (new Date()).getFullYear();
                        
            if (day.substr(0, 1) == '0') {
                day = day.substr(1);
            }
            
            return day + '&nbsp;' + mon + (thisyear != year ? ', ' + year : '');
        }
        
        delta = delta + (relative_to.getTimezoneOffset() * 60);
 
        if (delta < 5) {
            r = 'minder dan 5 seconden geleden';
        } else if (delta < 30) {
            r = 'halve minuut geleden';
        } else if (delta < 60) {
            r = 'minder dan 1 minuut geleden';
        } else if (delta < 120) {
            r = '1 minuut geleden';
        } else if (delta < (45*60)) {
            r = (parseInt(delta / 60)).toString() + ' minuten geleden';
        } else if (delta < (2*90*60)) { // 2* because sometimes read 1 hours ago
            r = 'ongeveer 1 uur geleden';
        } else if (delta < (24*60*60)) {
            r = 'about ' + (parseInt(delta / 3600)).toString() + ' uur geleden';
        } else {
            if (delta < (48*60*60)) {
                r = 'gisteren ' + formatTime(date);
            } else {
                r = formatDate(date) + ' ' + formatTime(date);
                // r = (parseInt(delta / 86400)).toString() + ' dagen geleden';
            }
        }
 
        return r;
    }
})();



//html

function loadTweets() {
getTwitters('tweets', { 
  id: 'nswrovers', 
  count: 25, 
  enableLinks: true, 
  ignoreReplies: false, 
  clearContents: true,
  template: '<div class="tweet"><div class="tweet_img"><a target="_blank" href="http://twitter.com/%user_screen_name%"><img src="%user_profile_image_url%" style="float: left; margin-right: 5px;" height="20px" width="20px" /></a></div><div class="tweet_text"><a target="_blank" href="http://twitter.com/%user_screen_name%" style="color:black;text-decoration:none;" ><b>%user_name%</b></a><b>:</b> %text% <br><a target="_blank" style="color:gray;font-size:8pt;text-decoration:none;" href="http://twitter.com/%user_screen_name%/statuses/%id%/">%time%</a><p></p></div></div>'
});
}
 
function init() {
loadTweets();
}
window.onload = init;