var BOSH_SERVICE = 'http://alias.fr.nf/http-bind';
var server_component = 'object.alias.fr.nf';

/**
 * Alias namespace
 */
var Alias = {
    
    /**
     * Status constants
     */
    Status: {
        ONLINE: 2,
        AWAY: 1,
        OFFLINE: 0
    },
    
    /**
     * Strophe xmpp connection
     */
    connection: null,
    
    /**
     * Send a roster request to server
     */
    getRoster: function() {
        var roster = $iq({type : 'get'}).c('query', {xmlns : Strophe.NS.ROSTER});
        Alias.connection.sendIQ(roster, Alias.onRoster);
    },

    /**
     * Return the status of a contact
     * @param contact a jquery object
     * @returns {Number} the status number
     * @see Alias.Status
     */
    getPresence: function(contact) {
        if ( contact.hasClass("online") )
            return Alias.Status["ONLINE"];
        else if ( contact.hasClass("away") )
            return Alias.Status["AWAY"];
        else
            return Alias.Status["OFFLINE"];
    },
    
    /**
     * Convert a jid to an id string suitable for css id
     * @param {String} jid
     * @returns {String} id
     */
    jid_to_id: function(jid) {
        return Strophe.getBareJidFromJid(jid).replace(/[@.]/g,'-');
    },

    /**
     * Return the id of a contact
     * @param contact jquery object
     * @returns {String} id
     */
    getID: function(contact) {
        return contact.find('.roster-jid').text();
    },
    
    /**
     * Get the home node of a contact
     * @param contact jquery object
     */
    getHome: function(contact) {
        var name = Base64.encode(Alias.getID(contact)) + '@' + server_component;
        var iq = $iq({type : 'get', to : name}).c('query', {xmlns : 'alias:query', type:'content'});
        Alias.connection.sendIQ(iq, Alias.onHome);
    },

    /**
     * Called when receiving home node, display in the main div
     * @param iq XML object
     */
    onHome: function(iq) {
        var content = $(iq).find('content').text();
        $('#main').html(content);
    },
    
    /**
     * Insert a contact keeping the sorting of the roster
     * The contacts are sorted based on their status and on their names
     * @param contact jQuery object
     */
    insertContact: function(contact) {
        var presence = Alias.getPresence(contact);
        var jid = Alias.getID(contact);
        var contacts = $('#roster li');
        if (contacts.length > 0) {
            var inserted = false;
            contacts.each(function () {
                var locpres = Alias.getPresence($(this));
                var locjid = Alias.getID($(this));
                if (presence > locpres)
                {
                    $(this).before(contact);
                    inserted = true;
                    return false;
                }
                else if ( (presence == locpres) && (jid < locjid) )
                {
                    $(this).before(contact);
                    inserted = true;
                    return false;
                }
            });

            if (!inserted) 
                $('#roster ul').append(contact);
        }
        else
            $('#roster ul').append(contact);
        contact.click(function(){Alias.getHome($(this));});
    },

    onPresence: function(presence) {
        var who = $(presence).attr('from');
        var type = $(presence).attr('type');
        if (type !== 'error')
        {
            var contact = $('#' + Alias.jid_to_id(who));
            contact.removeClass('online away offline');
            if (type === 'unavailable')
            {
                contact.addClass('offline');
            }
            else
            {
                var show = $(presence).find('show').text();
                if (show === '' || show === '')
                {
                    contact.addClass('online');
                }
                else
                {
                    contact.addClass('away');
                }
            }
            contact.remove();
            Alias.insertContact(contact);
        }
        return true;
    },

    onRoster: function(iq) {
        $('#roster li').remove();
        var elems = iq.getElementsByTagName('query');
        var query = elems[0];
        Strophe.forEachChild(query, 'item', function(item)
        {
            var jid = item.getAttribute('jid');
            var name = item.getAttribute('name') || jid;
            var id = Alias.jid_to_id(jid);
            var contact = $("<li id='" + id + "' class='roster-contact offline'>"
                            + "<div class='roster-name'>" + name + "</div>"
                            + "<div class='roster-jid'>" + jid + "</div></li>");
            Alias.insertContact(contact);
        });
        Alias.connection.addHandler(Alias.onPresence,null,'presence', null, null, null, null);
        Alias.connection.send($pres());
        return true;
    },

    onConnect: function(status) {
        var jid = $('#jid').get(0).value;
        if ( status == Strophe.Status.CONNECTING )
        {
            log('Strophe is connecting.');
        } else if ( status == Strophe.Status.CONNFAIL )
        {
            log('Strophe failed to connect.');
        } else if ( status == Strophe.Status.DISCONNECTING )
        {
            log('Strophe is disconnecting.');
        } else if ( status == Strophe.Status.DISCONNECTED )
        {
            log('Strophe is disconnected.');
        } else if ( status == Strophe.Status.CONNECTED )
        {
            log('Strophe is connected.');
            Alias.getRoster();
            $('#password').val('');
            $('#login').dialog('close');
            $('#status').append($('<a href="#" id="connect">Disconnect</a>'));
            $('#connect').click(function(){
                Alias.connection.disconnect();
                $('#roster ul').empty();
                $('#login').dialog('open');
                $(this).remove();
             });
        }
    }
   
};

function log(msg, color) {
    $('#log').append($('<div></div>').css('background-color', color).text(msg));
}

function rawInput(data) {
    log('RECV: ' + data, '#FBB6B4');
}

function rawOutput(data) {
    log('SENT: ' + data, '#B5BBFB');
}

jQuery.expr[':'].Contains = function(a,i,m){
    return jQuery(a).text().toUpperCase().indexOf(m[3].toUpperCase())>=0;
};

$(document).ready(function(){
   var connection = new Strophe.Connection(BOSH_SERVICE);
   connection.rawInput = rawInput;
   connection.rawOutput = rawOutput;
   Alias.connection = connection;

   $('#login').dialog({
       autoOpen: true,
       modal: true,
       title: 'Connect',
       buttons: { 
           'Connect' : function () {
               Alias.connection.connect($('#jid').get(0).value,
                                  $('#pass').get(0).value,
                                  Alias.onConnect);}
       }
   });
   
   $('#bottomup').click(function(){
       $(this).next().slideToggle();
   });
   
   $('#rosterfilter').keyup(function() {
       var filter = $(this).val();
       $('#roster ul li div.roster-name:not(:Contains("' + filter + '"))').parent().hide();
       $('#roster ul li div.roster-name:Contains("' + filter + '")').parent().show();
   });
});