var TwitterSearch = {
    search: function(search_term, lat, lng, distance) {
        this.insertAjaxHack(search_term, lat, lng, distance);
    },

    insertAjaxHack: function(search_term, lat, lng, distance) {
        var url = 'http://search.twitter.com/search.json?phrase=' + escape(search_term)
          + '&geocode=' + escape(lat) + '%2C' + escape(lng) + '%2C10km'
         + '&callback=TwitterSearch.parseAndDisplayResults';

        //alert(url);
        document.writeln('<div id="twitter_search_results">');
        document.writeln('<span class="loading">Loading Tweets...</span>');
        document.writeln('<script src="' + url + '" type="text/javascript"></script>');
        document.writeln('</div>');
    },


    parseAndDisplayResults: function(results_json) {
        this.parseResults(results_json);
        this.displayResults(results_json);
    },

    parseResults: function(results_json) {
        if (results_json.results.length > 0) {
            this.last_tweet_id = results_json.results[0].id;
        }
    },

    displayResults: function(results_json) {
        var results_container = document.getElementById('twitter_search_results');

        var tweetlist = '';

        if (results_json.results.length > 10) results_json.results.length = 10;

        for (var i = 0; i < results_json.results.length; i++) {
            var result = results_json.results[i];
            var text = this.sanitizeMessageText(result.text);
            var date = new Date(result.created_at);
            var even_odd = 'odd';
            if (i % 2 == 0) { even_odd = 'even'; }

            tweetlist += '<li class="result ' + even_odd + '" id="result_' + result.id + '">';
            //tweetlist += '<div class="avatar"><a target="_blank" href="http://twitter.com/' + result.from_user + '"><img src="' + result.profile_image_url + '"/></a></div>';
            tweetlist += '<div class="text"><a target="_blank" href="http://twitter.com/' + result.from_user + '">' + result.from_user + '</a>: <span class="msgtxt ' + result.iso_language_code + '" id="msgtxt' + result.id + '">' + text + '</span></div>';
            //tweetlist += '<div class="info">' + date.time_ago_in_words() + ' ago · <a target="_blank" class="litnv" href="http://twitter.com/home?status=@' + result.from_user + '">Reply</a> · <a target="_blank" class="lit" href="http://twitter.com/' + result.from_user + '/statuses/' + result.id + '">View Tweet</a></div>';
            tweetlist += '<div class="info">' + date.time_ago_in_words() + ' ago · <a target="_blank" class="lit" href="http://twitter.com/' + result.from_user + '/statuses/' + result.id + '">View Tweet</a></div>';
            tweetlist += '</li>';
        }


        if (results_json.results.length == 0) results_container.innerHTML = '<p>No twitter comments found </p>';
        else
        results_container.innerHTML = '<ol id="twitter_results">' + tweetlist + '</ol>';
    },

    sanitizeMessageText: function(text) {
        text = text.replace('&amp;', '&');

        var link_regex = new RegExp("(([a-zA-Z]+:\/\/)([a-z][a-z0-9_\..-]*[a-z]{2,6})([a-zA-Z0-9\/*-_\?&%]*))", "i");
        text = text.replace(link_regex, '<a href="$1">$1</a>');

        var reply_regex = new RegExp("@([a-zA-Z0-9_]+)", "g");
        text = text.replace(reply_regex, '@<a href="http://twitter.com/$1">$1</a>');

        return (text);
    }

};

/* This function allows us to print stuff like "4 minutes ago" or "3 days ago"
yanked from http://www.redhillconsulting.com.au/blogs/simon/archives/000426.html
who I suspect yanked it straight out of Rails */
Date.prototype.time_ago_in_words = function() {
    var words;
    distance_in_milliseconds = new Date() - this;
    distance_in_minutes = Math.round(Math.abs(distance_in_milliseconds / 60000));

    if (distance_in_minutes == 0) {
        words = "less than a minute";
    } else if (distance_in_minutes == 1) {
        words = "1 minute";
    } else if (distance_in_minutes < 45) {
        words = distance_in_minutes + " minutes";
    } else if (distance_in_minutes < 90) {
        words = "about 1 hour";
    } else if (distance_in_minutes < 1440) {
        words = "about " + Math.round(distance_in_minutes / 60) + " hours";
    } else if (distance_in_minutes < 2160) {
        words = "about 1 day";
    } else if (distance_in_minutes < 43200) {
        words = Math.round(distance_in_minutes / 1440) + " days";
    } else if (distance_in_minutes < 86400) {
        words = "about 1 month";
    } else if (distance_in_minutes < 525600) {
        words = Math.round(distance_in_minutes / 43200) + " months";
    } else if (distance_in_minutes < 1051200) {
        words = "about 1 year";
    } else {
        words = "over " + Math.round(distance_in_minutes / 525600) + " years";
    }

    return words;
};