define([
    '/common/common-util.js',
    '/common/outer/worker-channel.js',
    '/common/outer/store-rpc.js',
], function (Util, Channel, SRpc) {

    var msgEv = Util.mkEvent();
    var sendMsg = Util.mkEvent();
    var create = function () {
        var Rpc = SRpc();

        var postMessage = function (data) {
            sendMsg.fire(data);
        };

        Channel.create(msgEv, postMessage, function (chan) {
            var clientId = '1';
            Object.keys(Rpc.queries).forEach(function (q) {
                if (q === 'CONNECT') { return; }
                if (q === 'JOIN_PAD') { return; }
                if (q === 'SEND_PAD_MSG') { return; }
                chan.on(q, function (data, cb) {
                    try {
                        Rpc.queries[q](clientId, data, cb);
                    } catch (e) {
                        console.error('Error in webworker when executing query ' + q);
                        console.error(e);
                        console.log(data);
                    }
                });
            });
            chan.on('CONNECT', function (cfg, cb) {
                // load Store here, with cfg, and pass a "query" (chan.query)
                // cId is a clientId used in ServiceWorker or SharedWorker
                cfg.query = function (cId, cmd, data, cb) {
                    cb = cb || function () {};
                    chan.query(cmd, data, function (err, data2) {
                        if (err) { return void cb({error: err}); }
                        cb(data2);
                    });
                };
                cfg.broadcast = function (excludes, cmd, data, cb) {
                    cb = cb || function () {};
                    if (excludes.indexOf(clientId) !== -1) { return; }
                    chan.query(cmd, data, function (err, data2) {
                        if (err) { return void cb({error: err}); }
                        cb(data2);
                    });
                };
                Rpc.queries['CONNECT'](clientId, cfg, function (data) {
                    if (data && data.state === "ALREADY_INIT") {
                        return void cb(data);
                    }
                    if (cfg.driveEvents) {
                        Rpc._subscribeToDrive(clientId);
                    }
                    if (cfg.messenger) {
                        Rpc._subscribeToMessenger(clientId);
                    }
                    cb(data);
                });
            });
            var chanId;
            chan.on('JOIN_PAD', function (data, cb) {
                chanId = data.channel;
                try {
                    Rpc.queries['JOIN_PAD'](clientId, data, cb);
                } catch (e) {
                    console.error('Error in webworker when executing query JOIN_PAD');
                    console.error(e);
                    console.log(data);
                }
            });
            chan.on('SEND_PAD_MSG', function (msg, cb) {
                var data = {
                    msg: msg,
                    channel: chanId
                };
                try {
                    Rpc.queries['SEND_PAD_MSG'](clientId, data, cb);
                } catch (e) {
                    console.error('Error in webworker when executing query SEND_PAD_MSG');
                    console.error(e);
                    console.log(data);
                }
            });
        }, true);
    };

    return {
        query: function (data) {
            msgEv.fire({data: data});
        },
        onMessage: function (cb) {
            sendMsg.reg(function (data) {
                setTimeout(function () {
                    cb(data);
                });
            });
        },
        create: create
    };
});