/*!
* jQuery Twitter Search Plugin
* Examples and documentation at: http://jquery.malsup.com/twitter/
* Copyright (c) 2010 M. Alsup
* Version: 1.01 (14-APR-2010)
* Dual licensed under the MIT and GPL licenses:
* http://www.opensource.org/licenses/mit-license.php
* http://www.gnu.org/licenses/gpl.html
* Requires: jQuery v1.3.2 or later
*/

// @todo: refresh button
; (function($) {
    $.fn.twitterSearch = function(options) {
        if (typeof options == 'string')
            options = { term: options };
        return this.each(function() {
            var $frame = $(this);
            var opts = $.extend(true, {}, $.fn.twitterSearch.defaults, options || {}, $.metadata ? $frame.metadata() : {});
            opts.formatter = opts.formatter || $.fn.twitterSearch.formatter;
            opts.filter = opts.filter || $.fn.twitterSearch.filter;
            var url = opts.url + opts.term;

            if (!opts.applyStyles) { // throw away all style defs
                for (var css in opts.css)
                    opts.css[css] = {};
            }
            
                  
            var $cont = $('<div class="twitterSearchContainter"></div>').appendTo($frame).css(opts.css['container']);
            var cont = $cont[0];
            if (opts.colorInterior)
                $cont.css('background-color', opts.colorInterior);

            $frame.css(opts.css['frame']);
            if (opts.colorExterior)
                $frame.css('border-color', opts.colorExterior);

            if (opts.pause)
                $cont.hover(function() { cont.twitterSearchPause = true; }, function() { cont.twitterSearchPause = false; });

            $('<div class="twitterSearchLoading">Ophalen tweets..</div>').css(opts.css['loading']).appendTo($cont);

            // grab twitter stream
            $.getJSONP({
                url: url,
                timeout: 30000,
                error: function(xhr, status, e) {
                    failWhale(e);
                },
                success: function(json) {
                    if (json.error) {
                        failWhale(json.error);
                        return;
                    }
                    $cont.empty();
                    // iterate twitter results 
                    $.each(json.results, function(i) {
                        if (!opts.filter.call(opts, this))
                            return; // skip this tweet
                        var tweet = opts.formatter(this, opts), $tweet = $(tweet);
                        $tweet.css(opts.css['tweet']);
                        var $img = $tweet.find('.twitterSearchProfileImg').css(opts.css['img']);
                        $tweet.find('.twitterSearchUser').css(opts.css['user']);
                        $tweet.find('.twitterSearchTime').css(opts.css['time']);
                        $tweet.find('a').css(opts.css['a']);
                        $tweet.appendTo($cont);
                        var $text = $tweet.find('.twitterSearchText').css(opts.css['text']);
                        if (opts.avatar) {
                            var w = $img.outerWidth() + parseInt($tweet.css('paddingLeft'));
                            $text.css('paddingLeft', w);
                        }
                    });


                    if (json.results.length < 2)
                        return;

                    // Set height to first n items
                    if ($cont.children().length >= opts.nrOfPosts) {
                        var newheight = 0;
                        for (i = 1; i <= opts.nrOfPosts; i++) {
                            newheight = newheight + $cont.children(':nth-child(' + i + ')').outerHeight();
                        }
                        $cont.height(newheight);
                    }

                    // stage first animation
                    setTimeout(go, opts.timeout);
                }
            });

            function failWhale(msg) {
                var $fail = $('<div class="twitterSearchFail">' + msg + '</div>').css(opts.css['fail']);
                $cont.empty().append($fail);
            };

            function go() {
                if (cont.twitterSearchPause) {
                    setTimeout(go, 500);
                    return;
                }
                
                var $el = $cont.children(':first'), el = $el[0];
                $el.animate(opts.animOut, opts.animOutSpeed, function() {

                    var h = $el.outerHeight();

                    // Set height to first n items                        
                    if ($cont.children().length > opts.nrOfPosts) {
                        var newheight = 0;
                        for (i = 2; i <= opts.nrOfPosts+1; i++) {
                            newheight = newheight + $cont.children(':nth-child(' + i + ')').outerHeight();
                        }
                        $cont.height(newheight);
                    }
                    
                    $el.animate({ marginTop: -h }, opts.animInSpeed, function() {
                        $el.css({ marginTop: 0, opacity: 1 });
                        /*@cc_on
                        try { el.style.removeAttribute('filter'); } // ie cleartype fix
                        catch (smother) { }
                        @*/
                        $el.css(opts.css['tweet']).show().appendTo($cont);

                        // Set height to first n items                        
                        if ($cont.children().length >= opts.nrOfPosts) {
                            var newheight = 0;
                            for (i = 1; i <= opts.nrOfPosts; i++) {
                                newheight = newheight + $cont.children(':nth-child(' + i + ')').outerHeight();
                            }
                            $cont.height(newheight);
                        }
                    });
                    // stage next animation
                    setTimeout(go, opts.timeout);
                });
            }
        });
    };

    $.fn.twitterSearch.filter = function(tweet) {
        return true;
    };

    $.fn.twitterSearch.formatter = function(json, opts) {
        var t = json.text;
        if (opts.anchors) {
            t = json.text.replace(/(http:\/\/\S+)/g, '<a href="$1">$1</a>');
            t = t.replace(/\@(\w+)/g, '<a href="http://twitter.com/$1">@$1</a>');
        }
        var s = '<div class="twitterSearchTweet">';
        if (opts.avatar)
            s += '<img class="twitterSearchProfileImg" src="' + json.profile_image_url + '" />';
        s += '<div>';
        var d = prettyDate(json.created_at);
        if (opts.time && d)
            
        s += '<div class="twitterSearchText">' + t 
    s += ' <span class="twitterSearchTime">' + d + '</span></div></div></div>';
        return s;
    };

    $.fn.twitterSearch.defaults = {
        url: 'http://search.twitter.com/search.json?callback=?&q=',
        anchors: true,       // true or false (enable embedded links in tweets)
        animOutSpeed: 500,     // speed of animation for top tweet when removed
        animInSpeed: 500,     // speed of scroll animation for moving tweets up
        animOut: { opacity: 0 }, // animation of top tweet when it is removed
        applyStyles: true,     // true or false (apply default css styling or not)
        avatar: false,       // true or false (show or hide twitter profile images)
        bird: true,         // true or false (show or hide twitter bird image)
        birdLink: false,     // url that twitter bird image should like to
        birdSrc: 'http://cloud.github.com/downloads/malsup/twitter/tweet.gif', // twitter bird image
        colorExterior: null,        // css override of frame border-color and title background-color
        colorInterior: null,        // css override of container background-color
        filter: null,               // callback fn to filter tweets:  fn(tweetJson) { /* return false to skip tweet */ }
        formatter: null,     // callback fn to build tweet markup
        pause: false,       // true or false (pause on hover)
        term: '',         // twitter search term
        time: true,         // true or false (show or hide the time that the tweet was sent)
        timeout: 6000,       // delay betweet tweet scroll
        title: null,       // title text to display when frame option is true (default = 'term' text)
        titleLink: null,     // url for title link
        nrOfPosts: 3,           // nr of posts to display at once
        css: {
            // default styling
            a: { textDecoration: 'none', color: '#006AAB' },
            bird: { width: '50px', height: '20px', position: 'absolute', left: '-30px', top: '-20px', border: 'none' },
            container: { overflow: 'hidden', height: '100%' },
            fail: { background: '#6cc5c3 url(http://cloud.github.com/downloads/malsup/twitter/failwhale.png) no-repeat 50% 50%', height: '100%', padding: '10px' },
            frame: { border: 'none' },
            tweet: { padding: '5px 10px', clear: 'left' },
            img: { 'float': 'left', margin: '5px', width: '48px', height: '48px' },
            loading: { padding: '20px', textAlign: 'center', color: '#888' },
            text: {},
            time: { fontSize: 'smaller', color: '#888' },
            title: { backgroundColor: '#C2CFF1', margin: 0, padding: '0 0 5px 0', textAlign: 'center', fontWeight: 'bold', fontSize: 'large', position: 'relative' },
            titleLink: { textDecoration: 'none', color: '#3B5998' },
            user: { fontWeight: 'bold' }
        }
    };

    // fn to handle jsonp with timeouts and errors
    // hat tip to Ricardo Tomasi for the timeout logic
    $.getJSONP = function(s) {
        s.dataType = 'jsonp';
        $.ajax(s);

        // figure out what the callback fn is
        var $script = $(document.getElementsByTagName('head')[0].firstChild);
        var url = $script.attr('src') || '';
        var cb = (url.match(/callback=(\w+)/) || [])[1];
        if (!cb)
            return; // bail
        var t = 0, cbFn = window[cb];

        $script[0].onerror = function(e) {
            $script.remove();
            handleError(s, {}, "error", e);
            clearTimeout(t);
        };

        if (!s.timeout)
            return;

        window[cb] = function(json) {
            clearTimeout(t);
            cbFn(json);
            cbFn = null;
        };

        t = setTimeout(function() {
            $script.remove();
            handleError(s, {}, "timeout");
            if (cbFn)
                window[cb] = function() { };
        }, s.timeout);

        function handleError(s, o, msg, e) {
            // support jquery versions before and after 1.4.3
            ($.ajax.handleError || $.handleError)(s, o, msg, e);
        }
    };

    /*
    * JavaScript Pretty Date
    * Copyright (c) 2008 John Resig (jquery.com)
    * Licensed under the MIT license.
    */
    // converts ISO time to casual time
    function prettyDate(time) {
        var date = new Date((time || "").replace(/-/g, "/").replace(/TZ/g, " ")),
      diff = (((new Date()).getTime() - date.getTime()) / 1000),
      day_diff = Math.floor(diff / 86400);

        if (isNaN(day_diff) || day_diff < 0 || day_diff >= 31)
            return;
        var v = day_diff == 0 && (
        diff < 60 && "just now" ||
        diff < 120 && "1 minute ago" ||
        diff < 3600 && Math.floor(diff / 60) + " minutes ago" ||
        diff < 7200 && "1 hour ago" ||
        diff < 86400 && Math.floor(diff / 3600) + " hours ago") ||
      day_diff == 1 && "Yesterday" ||
      day_diff < 7 && day_diff + " days ago" ||
      day_diff < 31 && Math.ceil(day_diff / 7) + " weeks ago";
        if (!v)
            window.console && console.log(time);
        return v ? v : '';
    }

})(jQuery);