/* jshint sub: true */

var
    /**
     * @type {SlackWrapper}
    **/
    DATA,

    /**
     * @type {Array.<Room>}
    **/
    HIGHLIGHTED_CHANS = [];

/**
 * @constructor
 * @implements {ChatSystem}
 * @extends {ChatContext}
**/
function SimpleChatSystem() {
    ChatContext.call(this);
}
SimpleChatSystem.prototype = Object.create(ChatContext.prototype);
SimpleChatSystem.prototype.constructor = SimpleChatSystem;

SimpleChatSystem.prototype.getId = function() {
    return this.team ? this.team.id : null;
};
SimpleChatSystem.prototype.getChatContext = function() {
    return this;
};
SimpleChatSystem.prototype.onRequest = function() { console.error("unimplemented"); };
SimpleChatSystem.prototype.sendMeMsg = function(chan, text) { console.error("unimplemented"); };
SimpleChatSystem.prototype.sendMsg = function(chan, text, attachments) { console.error("unimplemented"); };
SimpleChatSystem.prototype.removeMsg = function(chan, ts) { console.error("unimplemented"); };
SimpleChatSystem.prototype.editMsg = function(chan, ts, newText) { console.error("unimplemented"); };
SimpleChatSystem.prototype.addReaction = function(chan, ts, reaction) { console.error("unimplemented"); };
SimpleChatSystem.prototype.removeReaction = function(chan, ts, reaction) { console.error("unimplemented"); };
SimpleChatSystem.prototype.openUploadFileStream = function(chan, contentType, callback) { console.error("unimplemented"); };
SimpleChatSystem.prototype.fetchHistory = function(chan) { console.error("unimplemented"); };
SimpleChatSystem.prototype.sendTyping = function(chan) { console.error("unimplemented"); };
SimpleChatSystem.prototype.markRead = function(chan, ts) { console.error("unimplemented"); };
SimpleChatSystem.prototype.sendCommand = function(chan, cmd, args) { console.error("unimplemented"); };
SimpleChatSystem.prototype.poll = function(knownVersion, now) { console.error("unimplemented"); return null; };

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

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

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

SlackWrapper.prototype.update = function(data) {
    var now = Date.now(),
        i;
    if (data["v"])
        this.lastServerVersion = data["v"];
    if (data["static"]) {
        for (i in data["static"]) {
            var ctx = this.context.getById(i);
            if (!ctx) {
                ctx = new SimpleChatSystem();
                this.context.push(ctx);
            }
            ctx.getChatContext().updateStatic(data["static"][i], now);
        }
    }
    this.context.foreachChannels(function(chan) {
        if (chan.lastMsg === chan.lastRead) {
            var pos = HIGHLIGHTED_CHANS.indexOf(chan);
            if (pos !== -1)
                HIGHLIGHTED_CHANS.splice(pos, 1);
        }
    });
    if (data["live"]) {
        for (i in data["live"]) {
            var history = this.history[i];
            if (!history)
                history = this.history[i] = new UiRoomHistory(i, 250, data["live"][i], now);
            else
                history.pushAll(data["live"][i], now);
        }
        for (var roomId in data["live"]) {
            var liveCtx = this.context.getChannelContext(roomId).getChatContext(),
                chan = liveCtx.channels[roomId];

            if (chan) {
                if (this.history[roomId].messages.length)
                    chan.lastMsg = Math.max(chan.lastMsg, this.history[roomId].lastMessage().ts);
                if (!chan.archived) {
                    onMsgReceived(liveCtx, chan, data["live"][roomId]);
                    if (SELECTED_ROOM && data["live"][SELECTED_ROOM.id])
                        onRoomUpdated();
                }
            } else {
                outOfSync();
            }
        }
    }
    if (data["static"]) {
        onContextUpdated();
    }
    var typingUpdated = false;
    if (data["typing"]) {
        this.context.contexts.forEach(function(ctx) {
            var chatCtx = ctx.getChatContext();
            typingUpdated |= chatCtx.updateTyping(data["typing"], now);
        }, this);
    }
    if (data["static"] || typingUpdated)
        onTypingUpdated();
};

setInterval(function() {
    var updated = false,
        now = Date.now();

    DATA.context.foreachContext(function(ctx) {
        if (ctx.getChatContext().cleanTyping(now))
            updated = true;
    });
    if (updated)
        onTypingUpdated();
}, 1000);

/**
 * @param {ChatContext} ctx
 * @param {string} text
 * @return {boolean}
**/
function isHighlighted(ctx, text) {
    var highlights = ctx.self.prefs.highlights;
    for (var i =0, nbHighlights = highlights.length; i < nbHighlights; i++)
        if (text.indexOf(highlights[i]) !== -1) {
            return true;
        }
    return false;
}

/**
 * @param {ChatContext} ctx
 * @param {Room} chan
 * @param {Array.<*>} msg
**/
function onMsgReceived(ctx, chan, msg) {
    if (chan !== SELECTED_ROOM || !window.hasFocus) {
        var selfReg = new RegExp("<@" +ctx.self.id), // FIXME remove context id
            highligted = false,
            areNew = false,
            newHighlited = false;

        msg.forEach(function(i) {
            if (parseFloat(i["ts"]) <= chan.lastRead) {
                return;
            }
            areNew = true;
            if (chan instanceof PrivateMessageRoom || (i["text"] && (i["text"].match(selfReg) || isHighlighted(ctx, i["text"])))) {
                if (HIGHLIGHTED_CHANS.indexOf(chan) === -1) {
                    newHighlited = true;
                    HIGHLIGHTED_CHANS.push(chan);
                }
                highligted = true;
            }
        });
        if (areNew) {
            updateTitle();
            var dom = document.getElementById("room_" +chan.id);
            if (dom) {
                dom.classList.add(R.klass.unread);
                if (highligted)
                    dom.classList.add(R.klass.unreadHi);
            }
            if (newHighlited && !window.hasFocus) {
                // TODO setting
                spawnNotification();
            }
        }
    }
}

/**
 * @param {Room} room
**/
function markRoomAsRead(room) {
    var highlightIndex = HIGHLIGHTED_CHANS.indexOf(room);
    if (room.lastMsg > room.lastRead) {
        sendReadMArker(room, room.lastMsg);
        room.lastRead = room.lastMsg;
    }
    if (highlightIndex >= 0) {
        HIGHLIGHTED_CHANS.splice(highlightIndex, 1);
        updateTitle();
    }
    var roomLi = document.getElementById("room_" +room.id);
    roomLi.classList.remove(R.klass.unread);
    roomLi.classList.remove(R.klass.unreadHi);
}

DATA = new SlackWrapper();