var
    /**
     * @type {SlackWrapper}
    **/
    SLACK

    /**
     * @type {Object.<string, {hl: number, unread: number}>} number of unread per chan
    **/
    ,UNREAD_CHANS = {};

;

/**
 * @constructor
**/
function SlackWrapper() {
    /** @type {number} */
    this.lastServerVersion = 0;

    /** @type {SlackData} */
    this.context = new SlackData(null);

    /** @type {!Object.<string, SlackHistory>} **/
    this.history = {};
}

SlackWrapper.prototype.update = function(data) {
    var now = Date.now();
    if (data["v"])
        this.lastServerVersion = data["v"];
    if (data["static"]) {
        this.context.updateStatic(data["static"], 0);
        onContextUpdated();
    }
    if (data["live"]) {
        for (var i in data["live"]) {
            var history = this.history[i];
            if (!history)
                this.history[i] = new SlackHistory(i, 250, data["live"][i], now);
            else
                history.pushAll(data["live"][i], now);
        }
        for (var roomId in data["live"]) {
            var chan = this.context.getChannel(roomId);
            if (chan) {
                if (!chan.archived) {
                    onMsgReceived(chan, data["live"][roomId]);
                    if (SELECTED_ROOM && data["live"][SELECTED_ROOM.id])
                        onRoomUpdated();
                }
            }
        }
    }
};

/**
 * @param {string} text
 * @return {boolean}
**/
function isHighlighted(text) {
    var highlights = SLACK.context.self.prefs.highlights;
    for (var i =0, nbHighlights = highlights.length; i < nbHighlights; i++)
        if (text.indexOf(highlights[i]) !== -1) {
            console.log("Found highlight " +highlights[i] +" in " +text);
            return true;
        }
    return false;
}

/**
 * @param {SlackChan|SlackGroup|SlackIms} chan
 * @param {Array.<*>} msg
**/
function onMsgReceived(chan, msg) {
    if (chan !== SELECTED_ROOM || !window.hasFocus) {
        var selfReg = new RegExp("<@" +SLACK.context.self.id)
            ,highligted = false
            ,newHighlited = false;
        if (!UNREAD_CHANS[chan.id]) {
            UNREAD_CHANS[chan.id] = { hl: 0, unread: 0 };
        }
        msg.forEach(function(i) {
            // TODO check read
            if (chan.id[0] === 'D' || i.text.match(selfReg) || isHighlighted(i.text)) {
                newHighlited |= !UNREAD_CHANS[chan.id].hl;
                UNREAD_CHANS[chan.id].hl++;
                highligted = true;
            } else {
                UNREAD_CHANS[chan.id].unread++;
            }
        });
        updateTitle();
        document.getElementById(chan.id).classList.add(R.klass.unread);
        if (highligted) {
            document.getElementById(chan.id).classList.add(R.klass.unreadHi);
        }
        if (newHighlited && !window.hasFocus) {
            // TODO setting
            spawnNotification();
        }
    }
}

/**
 * @param {SlackChan|SlackGroup|SlackIms} room
**/
function markRoomAsRead(room) {
    if (UNREAD_CHANS[room.id]) {
        UNREAD_CHANS[room.id] = { hl: 0, unread: 0 };
        updateTitle();
    }
    var roomLi = document.getElementById(room.id);
    roomLi.classList.remove(R.klass.unread);
    roomLi.classList.remove(R.klass.unreadHi);
}

SLACK = new SlackWrapper();