(function($) {

var BASEURL = (function() {
    var url = $('script[src$="irc.js"]').attr('src').replace(/\/js\/[^\/]+$/, '');
    if(url.match(/^\//) || !url) url = window.location.href.replace(/\/[\/\w#\?]+$/, '');
    window.console && console.log('BASEURL=' + url);
    return url;
})();

var url_replace = function(str, p1) {
    var text = p1;

    if(str.match(/\.png/i)) {
        text = '<img src="' + p1 + '" alt="' + p1 + '">';
    }
    else if(str.match(/\.jpe?g/i)) {
        text = '<img src="' + p1 + '" alt="' + p1 + '">';
    }
    else {
    }

    return '<a href="' + p1 + '" target="_blank">' + text + '</a>';
};

/*
 * flash fallback
 *
if(!('WebSocket' in window)) {
    document.write([
        '<script type="text/javascript" src="' + BASEURL + '/js/swfobject.js"></script>',
        '<script type="text/javascript" src="' + BASEURL + '/js/FABridge.js"></script>',
        '<script type="text/javascript" src="' + BASEURL + '/js/web_socket.js"></script>'
    ].join(''));
}
if(WebSocket.__initialize) {
    // Set URL of your WebSocketMain.swf here:
    WebSocket.__swfLocation = BASEURL + '/js/WebSocketMain.swf';
}
*/


$(document).ready(function() {
    var chat = new WebSocket(BASEURL.replace(/^http/, 'ws') + '/chat');
    var ui = { history_index: 0, history: [] };
    var channel = 'betsy';
    var nick = 'b_guest';

    chat.init_commands = [
        'NICK ' + nick,
        'USER guest_username 8 * :Guest name',
        'JOIN #' + channel
    ];
    chat.init_reader = function(e) {
        window.console && console.log(e.data);
        if(chat.init_commands.length) {
            chat.send(chat.init_commands.shift() + '\n');
        }
        else {
            ui.input.removeAttr('disabled');
            chat.onmessage = ui.print;
        }
    };
    chat.end = function() {
        ui.print({ internal_message: 1, data: 'Disconnected. <a href="">Reconnect?</a>' });
        ui.input.attr('disabled', 'disabled');
    };

    /* this code block is leaking memory, like there's no tomorrow :/
    chat.keep_ws_alive = function() {
        window.console && console.log('keepalive');
        if(chat.keep_ws_alive.timer) clearTimeout(chat.keep_ws_alive.timer);
        if(chat && chat.readyState == WebSocket.OPEN) chat.send(''); // keep the websocket alive
        return setInterval(chat.keep_ws_alive, 100000);
    };
    chat.keep_ws_alive.timer = chat.keep_ws_alive();
    */

    ui.input = $('#chat input');
    ui.input.keydown(function(e) {
        if(e.keyCode == 38) { // up
            ui.history_index++;
            if(ui.history_index >= ui.history.length) ui.history_index = ui.history.length - 1;
            ui.input.val(ui.history[ ui.history_index ]);
        }
        else if(e.keyCode == 40) { // down
            ui.history_index--;
            if(ui.history_index < 0) {
                ui.history_index = -1;
                ui.input.val('');
            }
            else {
                ui.input.val(ui.history[ ui.history_index ])
            }
        }
    });

    ui.output = $('#chat ul');
    ui.print = function(e) {
        var str = e.data; // can this be a partial buffer? maybe we need to buffer up and then split on \n?
        window.console && console.log(str);
        if(str.match(/^PING (\S*)/i)) {
            chat.send('PONG ' + RegExp.$1 + '\n');
        }
        else if(str.match(/^:([^!]+).*PRIVMSG #\w+ :(.*)/)) { // :batman!~batman@cm-84.208.177.18.getinternet.no PRIVMSG #betsy :some message
            var nick = RegExp.$1;
            var message = RegExp.$2
                            .replace(/&/g, '&')
                            .replace(/</g, '<')
                            .replace(/>/g, '>')
                            .replace(/"/g, '"')
                            .replace(/(http:\/\/\S+)\.?/gi, url_replace);
                            ;

            ui.output.append(
                  '<li>'
                + '<span class="nick">' + nick + '</span>'
                + '<span class="message">' + message + '</span>'
                + '</li>'
            );
        }

        else if(str.match(/ 353 \w+ = #\w+ :(.*)/)) { // :magnet.shadowcat.co.uk 353 guest123 = #betsy :guest123 batman
            var n = RegExp.$1.split(' ').length;
            ui.output.append('<li>' + n + ' person(s) in chat room</li>');
        }
        else if(e.internal_message) {
            ui.output.append('<li>' + str + '</li>');
        }

        ui.output.scrollTop( ui.output.prop('scrollHeight') );
    };
    ui.paint = function() {
        $('#chat').height( $(window).height() - 70 );
    };

    $('#chat form').submit(function() {
        var buffer = ui.input.val();
        ui.input.val('').focus();
        if(buffer == '') return false;
        ui.history.unshift(buffer);

        if(buffer.match(/^\/(\w+)(.*)/)) {
            var cmd = RegExp.$1.toUpperCase();
            if(cmd == 'JOIN') return false;
            if(cmd == 'PART') return false;
            buffer = cmd + RegExp.$2;
        }
        else {
            buffer = 'PRIVMSG #' + channel + ' :' + buffer;
        }

        window.console && console.log('send: ' + buffer);
        if(chat) chat.send(buffer + '\n');
        ui.print({ data: ':' + nick + '!~echo@getbetsy.com PRIVMSG #dummy :' + buffer });
        return false;
    });

    $(window).bind('resize', ui.paint);

    chat.onclose = chat.end;
    chat.onopen = chat.init_reader;
    chat.onmessage = chat.init_reader;
    ui.input.attr('disabled', 'disabled');
    ui.paint();
}); // end $(document).ready()
})(jQuery);