/* 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.starMsg = function(chan, msgId) { console.error("unimplemented"); };
SimpleChatSystem.prototype.unstarMsg = function(chan, msgId) { console.error("unimplemented"); };
SimpleChatSystem.prototype.pinMsg = function(chan, msgId) { console.error("unimplemented"); };
SimpleChatSystem.prototype.unpinMsg = function(chan, msgId) { 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);
            }
            var pins = {};
            if (data["static"][i]["channels"])
                data["static"][i]["channels"].forEach(function(chanInfo) {
                    if (chanInfo["pins"]) {
                        pins[chanInfo["id"]] = chanInfo["pins"];
                        chanInfo["pins"] = undefined;
                    }
                });
            ctx.getChatContext().updateStatic(data["static"][i], now);
            for (var chanId in pins) {
                var msgs = [],
                    histo = this.history[chanId];
                if (!histo)
                    histo = this.history[chanId] = new UiRoomHistory(chanId, 250, null, now);
                pins[chanId].forEach(function(msg) {
                    msgs.push(histo.messageFactory(msg, now));
                });
                ctx.getChatContext().channels[chanId].pins = msgs;
            }
        }
    }
    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.setLastMsg(this.history[roomId].lastMessage().ts, now);
                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();
    if (data["config"]) {
        CONFIG = new Config(data["config"]);
        onConfigUpdated();
    }
    if (SELECTED_CONTEXT && SELECTED_ROOM && data["static"] && data["static"][SELECTED_CONTEXT.team.id] && data["static"][SELECTED_CONTEXT.team.id]["channels"] && data["static"][SELECTED_CONTEXT.team.id]["channels"]) {
        var arr = data["static"][SELECTED_CONTEXT.team.id]["channels"];
        i =0;
        for (var nbChan = arr.length; i < nbChan; i++) {
            if (arr[i].id === SELECTED_ROOM.id) {
                onRoomUpdated();
                break;
            }
        }
    }
};

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 selfId = ctx.self ? ctx.self.id : null,
            selfReg = selfId ? new RegExp("<@" +selfId) : null, // FIXME remove context id
            highligted = false,
            areNew = false,
            newHighlited = false;

        msg.forEach(function(i) {
            if (parseFloat(i["ts"]) <= chan.lastRead) {
                return;
            }
            if (i["user"] !== ctx.self.id) {
                areNew = true;
                if (chan instanceof PrivateMessageRoom || (i["text"] && ((selfReg && 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();
            }
        }
    }
    msg.forEach(function(m) {
        if (!selfId || selfId === m.userId) {
            for (var i =0, nbPending = PENDING_MESSAGES.length; i < nbPending; i++) {
                var current = PENDING_MESSAGES[i];
                if (current.channel === chan.id && !!m["isMeMessage"] === current.isMe && ((m["pendingId"] === current.pendingId && current.pendingId) || (!current.pendingId && m["text"].trim() === current.text))) {
                    PENDING_MESSAGES.splice(i, 1);
                    return;
                }
            }
        }
    });
}

/**
 * @param {Room} room
**/
function markRoomAsRead(room) {
    var highlightIndex = HIGHLIGHTED_CHANS.indexOf(room);
    if (room.lastMsg > room.lastRead) {
        var history = DATA.history[room.id];
        if (history) {
            var lastMsg = history.lastMessage();
            if (lastMsg) {
                sendReadMarker(room, lastMsg.id, lastMsg.ts);
                room.lastRead = lastMsg.ts;
            }
        }
    }
    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);
}

function invalidateAllMessages() {
    for (var i in DATA.history)
        DATA.history[i].invalidateAllMessages();
    if (SELECTED_ROOM)
        onRoomUpdated();
}

DATA = new SlackWrapper();