/*
 * jQuery LiveTwitter 1.3.1
 * - Live updating Twitter plugin for jQuery
 *
 * Copyright (c) 2009 Inge Jørgensen (elektronaut.no)
 * Licensed under the MIT license (MIT-LICENSE.txt)
 *
 * $Date: 2009/06/10 $
 */

/*
 * Usage example:
 * $("#twitterSearch").liveTwitter('bacon', {limit: 10, rate: 15000});
 */

(function ($) {
    if (!$.fn.reverse) {
        $.fn.reverse = function () {
            return this.pushStack(this.get().reverse(), arguments);
        };
    }
    $.fn.liveTwitter = function (query, options) {
        $(this).each(function () {
            var settings = {};
            if (this.twitter) {
                settings = jQuery.extend(this.twitter.settings, options);
                this.twitter.settings = settings;
                if (query) {
                    this.twitter.query = query;
                }
                this.twitter.limit = settings.limit;
                this.twitter.mode = settings.mode;
                if (this.twitter.interval) {
                    this.twitter.refresh();
                }
            } else {
                settings = jQuery.extend({
                    mode: 'search', // Mode, valid options are: 'search', 'user_timeline'
                    rate: 15000,    // Refresh rate in ms
                    limit: 10,       // Limit number of results
                    refresh: true
                }, options);
                window.twitter_callback = function () { return true; };
                this.twitter = {
                    settings: settings,
                    query: query,
                    limit: settings.limit,
                    mode: settings.mode,
                    interval: false,
                    container: this,
                    lastTimeStamp: 0,
                    relativeTime: function (timeString) {
                        var parsedDate = Date.parse(timeString);
                        var delta = (Date.parse(Date()) - parsedDate) / 1000;
                        var r = '';
                        if (delta < 60) {
                            r = delta + ' seconds ago';
                        } else if (delta < 120) {
                            r = 'a minute ago';
                        } else if (delta < (45 * 60)) {
                            r = (parseInt(delta / 60, 10)).toString() + ' minutes ago';
                        } else if (delta < (90 * 60)) {
                            r = 'an hour ago';
                        } else if (delta < (24 * 60 * 60)) {
                            r = '' + (parseInt(delta / 3600, 10)).toString() + ' hours ago';
                        } else if (delta < (48 * 60 * 60)) {
                            r = 'a day ago';
                        } else {
                            r = (parseInt(delta / 86400, 10)).toString() + ' days ago';
                        }
                        return r;
                    },
                    refreshTime: function () {
                        var twitter = this;
                        $(twitter.container).find('span.time').each(function () {
                            $(this).html(twitter.relativeTime(this.timeStamp));
                        });
                    },
                    refresh: function (initialize) {
                        var twitter = this;
                        if (this.settings.refresh || initialize) {
                            var encodedQuery = encodeURIComponent(this.query);
                            var url = '';
                            if (twitter.mode == 'search') {
                                url = "http://search.twitter.com/search.json?q=" + encodedQuery + "&callback=?";
                            } else if (twitter.mode == 'user_timeline') {
                                url = "http://twitter.com/statuses/user_timeline/" + encodedQuery + ".json?count=5&callback=?";
                            }
                            $.getJSON(url, function (json) {
                                var results = null;
                                if (twitter.mode == 'search') {
                                    results = json.results;
                                } else {
                                    results = json;
                                }
                                $(results).reverse().each(function () {
                                    var linkified_text = this.text.replace(/[A-Za-z]+:\/\/[A-Za-z0-9-_]+\.[A-Za-z0-9-_:%&\?\/.=]+/, function (m) { return m.link(m); });
                                    linkified_text = linkified_text.replace(/@[A-Za-z0-9_]+/, function (u) { return u.link('http://twitter.com/' + u.replace(/^@/, '')); });
                                    if (Date.parse(this.created_at) > twitter.lastTimeStamp) {
                                        var tweetHTML = '<div class="tweet tweet-' + this.id + '">';
                                        /*if(twitter.mode == 'search') {
                                        tweetHTML += 
                                        '<img width="24" height="24" src="'+this.profile_image_url+'" />' +
                                        '<p class="text"><span class="username"><a href="http://twitter.com/'+this.from_user+'">'+this.from_user+'</a>:</span> ';
                                        } else {
                                        tweetHTML += 
                                        '<p class="text"> ';
                                        }
                                        tweetHTML += 
                                        linkified_text +
                                        ' <span class="time">'+twitter.relativeTime(this.created_at)+'</span>' +
                                        '</p>' +
                                        '</div>';*/
                                        var tweeturl = 'http://twitter.com/fatdux/status/'+this.id;
                                        //tweetHTML += '<div class="author">#' + this.in_reply_to_screen_name + '</div>';
                                        tweetHTML += '<p><a href="' + tweeturl +'">' + this.text + '</a></p>';
                                        tweetHTML += '</div>';
                                        $(twitter.container).prepend(tweetHTML);
                                        var timeStamp = this.created_at;
                                        $(twitter.container).find('span.time:first').each(function () {
                                            this.timeStamp = timeStamp;
                                        });
                                        if (!initialize) {
                                            $(twitter.container).find('.tweet-' + this.id).hide().fadeIn();
                                        }
                                        twitter.lastTimeStamp = Date.parse(this.created_at);
                                    }
                                });
                                // Limit number of entries
                                $(twitter.container).find('div.tweet:gt(' + (twitter.limit - 1) + ')').remove();
                            });
                        }
                    },
                    start: function () {
                        var twitter = this;
                        if (!this.interval) {
                            this.interval = setInterval(function () { twitter.refresh(); }, twitter.settings.rate);
                            this.refresh(true);
                        }
                    },
                    stop: function () {
                        if (this.interval) {
                            clearInterval(this.interval);
                            this.interval = false;
                        }
                    }
                };
                var twitter = this.twitter;
                this.timeInterval = setInterval(function () { twitter.refreshTime(); }, 5000);
                this.twitter.start();
            }
        });
        return this;
    };
})(jQuery);