// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    return new (P || (P = Promise))(function (resolve, reject) {
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};
var __generator = (this && this.__generator) || function (thisArg, body) {
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    }
};
import { HandshakeProtocol } from "./HandshakeProtocol";
import { MessageType } from "./IHubProtocol";
import { LogLevel } from "./ILogger";
import { Subject } from "./Subject";
import { Arg } from "./Utils";
var DEFAULT_TIMEOUT_IN_MS = 30 * 1000;
var DEFAULT_PING_INTERVAL_IN_MS = 15 * 1000;
/** Describes the current state of the {@link HubConnection} to the server. */
export var HubConnectionState;
(function (HubConnectionState) {
    /** The hub connection is disconnected. */
    HubConnectionState["Disconnected"] = "Disconnected";
    /** The hub connection is connecting. */
    HubConnectionState["Connecting"] = "Connecting";
    /** The hub connection is connected. */
    HubConnectionState["Connected"] = "Connected";
    /** The hub connection is disconnecting. */
    HubConnectionState["Disconnecting"] = "Disconnecting";
    /** The hub connection is reconnecting. */
    HubConnectionState["Reconnecting"] = "Reconnecting";
})(HubConnectionState || (HubConnectionState = {}));
/** Represents a connection to a SignalR Hub. */
var HubConnection = /** @class */ (function () {
    function HubConnection(connection, logger, protocol, reconnectPolicy) {
        var _this = this;
        Arg.isRequired(connection, "connection");
        Arg.isRequired(logger, "logger");
        Arg.isRequired(protocol, "protocol");
        this.serverTimeoutInMilliseconds = DEFAULT_TIMEOUT_IN_MS;
        this.keepAliveIntervalInMilliseconds = DEFAULT_PING_INTERVAL_IN_MS;
        this.logger = logger;
        this.protocol = protocol;
        this.connection = connection;
        this.reconnectPolicy = reconnectPolicy;
        this.handshakeProtocol = new HandshakeProtocol();
        this.connection.onreceive = function (data) { return _this.processIncomingData(data); };
        this.connection.onclose = function (error) { return _this.connectionClosed(error); };
        this.callbacks = {};
        this.methods = {};
        this.closedCallbacks = [];
        this.reconnectingCallbacks = [];
        this.reconnectedCallbacks = [];
        this.invocationId = 0;
        this.receivedHandshakeResponse = false;
        this.connectionState = HubConnectionState.Disconnected;
        this.connectionStarted = false;
        this.cachedPingMessage = this.protocol.writeMessage({ type: MessageType.Ping });
    }
    /** @internal */
    // Using a public static factory method means we can have a private constructor and an _internal_
    // create method that can be used by HubConnectionBuilder. An "internal" constructor would just
    // be stripped away and the '.d.ts' file would have no constructor, which is interpreted as a
    // public parameter-less constructor.
    HubConnection.create = function (connection, logger, protocol, reconnectPolicy) {
        return new HubConnection(connection, logger, protocol, reconnectPolicy);
    };
    Object.defineProperty(HubConnection.prototype, "state", {
        /** Indicates the state of the {@link HubConnection} to the server. */
        get: function () {
            return this.connectionState;
        },
        enumerable: true,
        configurable: true
    });
    Object.defineProperty(HubConnection.prototype, "connectionId", {
        /** Represents the connection id of the {@link HubConnection} on the server. The connection id will be null when the connection is either
         *  in the disconnected state or if the negotiation step was skipped.
         */
        get: function () {
            return this.connection ? (this.connection.connectionId || null) : null;
        },
        enumerable: true,
        configurable: true
    });
    Object.defineProperty(HubConnection.prototype, "baseUrl", {
        /** Indicates the url of the {@link HubConnection} to the server. */
        get: function () {
            return this.connection.baseUrl || "";
        },
        /**
         * Sets a new url for the HubConnection. Note that the url can only be changed when the connection is in either the Disconnected or
         * Reconnecting states.
         * @param {string} url The url to connect to.
         */
        set: function (url) {
            if (this.connectionState !== HubConnectionState.Disconnected && this.connectionState !== HubConnectionState.Reconnecting) {
                throw new Error("The HubConnection must be in the Disconnected or Reconnecting state to change the url.");
            }
            if (!url) {
                throw new Error("The HubConnection url must be a valid url.");
            }
            this.connection.baseUrl = url;
        },
        enumerable: true,
        configurable: true
    });
    /** Starts the connection.
     *
     * @returns {Promise<void>} A Promise that resolves when the connection has been successfully established, or rejects with an error.
     */
    HubConnection.prototype.start = function () {
        this.startPromise = this.startWithStateTransitions();
        return this.startPromise;
    };
    HubConnection.prototype.startWithStateTransitions = function () {
        return __awaiter(this, void 0, void 0, function () {
            var e_1;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        if (this.connectionState !== HubConnectionState.Disconnected) {
                            return [2 /*return*/, Promise.reject(new Error("Cannot start a HubConnection that is not in the 'Disconnected' state."))];
                        }
                        this.connectionState = HubConnectionState.Connecting;
                        this.logger.log(LogLevel.Debug, "Starting HubConnection.");
                        _a.label = 1;
                    case 1:
                        _a.trys.push([1, 3, , 4]);
                        return [4 /*yield*/, this.startInternal()];
                    case 2:
                        _a.sent();
                        this.connectionState = HubConnectionState.Connected;
                        this.connectionStarted = true;
                        this.logger.log(LogLevel.Debug, "HubConnection connected successfully.");
                        return [3 /*break*/, 4];
                    case 3:
                        e_1 = _a.sent();
                        this.connectionState = HubConnectionState.Disconnected;
                        this.logger.log(LogLevel.Debug, "HubConnection failed to start successfully because of error '" + e_1 + "'.");
                        return [2 /*return*/, Promise.reject(e_1)];
                    case 4: return [2 /*return*/];
                }
            });
        });
    };
    HubConnection.prototype.startInternal = function () {
        return __awaiter(this, void 0, void 0, function () {
            var handshakePromise, handshakeRequest, e_2;
            var _this = this;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        this.stopDuringStartError = undefined;
                        this.receivedHandshakeResponse = false;
                        handshakePromise = new Promise(function (resolve, reject) {
                            _this.handshakeResolver = resolve;
                            _this.handshakeRejecter = reject;
                        });
                        return [4 /*yield*/, this.connection.start(this.protocol.transferFormat)];
                    case 1:
                        _a.sent();
                        _a.label = 2;
                    case 2:
                        _a.trys.push([2, 5, , 7]);
                        handshakeRequest = {
                            protocol: this.protocol.name,
                            version: this.protocol.version,
                        };
                        this.logger.log(LogLevel.Debug, "Sending handshake request.");
                        return [4 /*yield*/, this.sendMessage(this.handshakeProtocol.writeHandshakeRequest(handshakeRequest))];
                    case 3:
                        _a.sent();
                        this.logger.log(LogLevel.Information, "Using HubProtocol '" + this.protocol.name + "'.");
                        // defensively cleanup timeout in case we receive a message from the server before we finish start
                        this.cleanupTimeout();
                        this.resetTimeoutPeriod();
                        this.resetKeepAliveInterval();
                        return [4 /*yield*/, handshakePromise];
                    case 4:
                        _a.sent();
                        // It's important to check the stopDuringStartError instead of just relying on the handshakePromise
                        // being rejected on close, because this continuation can run after both the handshake completed successfully
                        // and the connection was closed.
                        if (this.stopDuringStartError) {
                            // It's important to throw instead of returning a rejected promise, because we don't want to allow any state
                            // transitions to occur between now and the calling code observing the exceptions. Returning a rejected promise
                            // will cause the calling continuation to get scheduled to run later.
                            throw this.stopDuringStartError;
                        }
                        return [3 /*break*/, 7];
                    case 5:
                        e_2 = _a.sent();
                        this.logger.log(LogLevel.Debug, "Hub handshake failed with error '" + e_2 + "' during start(). Stopping HubConnection.");
                        this.cleanupTimeout();
                        this.cleanupPingTimer();
                        // HttpConnection.stop() should not complete until after the onclose callback is invoked.
                        // This will transition the HubConnection to the disconnected state before HttpConnection.stop() completes.
                        return [4 /*yield*/, this.connection.stop(e_2)];
                    case 6:
                        // HttpConnection.stop() should not complete until after the onclose callback is invoked.
                        // This will transition the HubConnection to the disconnected state before HttpConnection.stop() completes.
                        _a.sent();
                        throw e_2;
                    case 7: return [2 /*return*/];
                }
            });
        });
    };
    /** Stops the connection.
     *
     * @returns {Promise<void>} A Promise that resolves when the connection has been successfully terminated, or rejects with an error.
     */
    HubConnection.prototype.stop = function () {
        return __awaiter(this, void 0, void 0, function () {
            var startPromise, e_3;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        startPromise = this.startPromise;
                        this.stopPromise = this.stopInternal();
                        return [4 /*yield*/, this.stopPromise];
                    case 1:
                        _a.sent();
                        _a.label = 2;
                    case 2:
                        _a.trys.push([2, 4, , 5]);
                        // Awaiting undefined continues immediately
                        return [4 /*yield*/, startPromise];
                    case 3:
                        // Awaiting undefined continues immediately
                        _a.sent();
                        return [3 /*break*/, 5];
                    case 4:
                        e_3 = _a.sent();
                        return [3 /*break*/, 5];
                    case 5: return [2 /*return*/];
                }
            });
        });
    };
    HubConnection.prototype.stopInternal = function (error) {
        if (this.connectionState === HubConnectionState.Disconnected) {
            this.logger.log(LogLevel.Debug, "Call to HubConnection.stop(" + error + ") ignored because it is already in the disconnected state.");
            return Promise.resolve();
        }
        if (this.connectionState === HubConnectionState.Disconnecting) {
            this.logger.log(LogLevel.Debug, "Call to HttpConnection.stop(" + error + ") ignored because the connection is already in the disconnecting state.");
            return this.stopPromise;
        }
        this.connectionState = HubConnectionState.Disconnecting;
        this.logger.log(LogLevel.Debug, "Stopping HubConnection.");
        if (this.reconnectDelayHandle) {
            // We're in a reconnect delay which means the underlying connection is currently already stopped.
            // Just clear the handle to stop the reconnect loop (which no one is waiting on thankfully) and
            // fire the onclose callbacks.
            this.logger.log(LogLevel.Debug, "Connection stopped during reconnect delay. Done reconnecting.");
            clearTimeout(this.reconnectDelayHandle);
            this.reconnectDelayHandle = undefined;
            this.completeClose();
            return Promise.resolve();
        }
        this.cleanupTimeout();
        this.cleanupPingTimer();
        this.stopDuringStartError = error || new Error("The connection was stopped before the hub handshake could complete.");
        // HttpConnection.stop() should not complete until after either HttpConnection.start() fails
        // or the onclose callback is invoked. The onclose callback will transition the HubConnection
        // to the disconnected state if need be before HttpConnection.stop() completes.
        return this.connection.stop(error);
    };
    /** Invokes a streaming hub method on the server using the specified name and arguments.
     *
     * @typeparam T The type of the items returned by the server.
     * @param {string} methodName The name of the server method to invoke.
     * @param {any[]} args The arguments used to invoke the server method.
     * @returns {IStreamResult<T>} An object that yields results from the server as they are received.
     */
    HubConnection.prototype.stream = function (methodName) {
        var _this = this;
        var args = [];
        for (var _i = 1; _i < arguments.length; _i++) {
            args[_i - 1] = arguments[_i];
        }
        var _a = this.replaceStreamingParams(args), streams = _a[0], streamIds = _a[1];
        var invocationDescriptor = this.createStreamInvocation(methodName, args, streamIds);
        var promiseQueue;
        var subject = new Subject();
        subject.cancelCallback = function () {
            var cancelInvocation = _this.createCancelInvocation(invocationDescriptor.invocationId);
            delete _this.callbacks[invocationDescriptor.invocationId];
            return promiseQueue.then(function () {
                return _this.sendWithProtocol(cancelInvocation);
            });
        };
        this.callbacks[invocationDescriptor.invocationId] = function (invocationEvent, error) {
            if (error) {
                subject.error(error);
                return;
            }
            else if (invocationEvent) {
                // invocationEvent will not be null when an error is not passed to the callback
                if (invocationEvent.type === MessageType.Completion) {
                    if (invocationEvent.error) {
                        subject.error(new Error(invocationEvent.error));
                    }
                    else {
                        subject.complete();
                    }
                }
                else {
                    subject.next((invocationEvent.item));
                }
            }
        };
        promiseQueue = this.sendWithProtocol(invocationDescriptor)
            .catch(function (e) {
            subject.error(e);
            delete _this.callbacks[invocationDescriptor.invocationId];
        });
        this.launchStreams(streams, promiseQueue);
        return subject;
    };
    HubConnection.prototype.sendMessage = function (message) {
        this.resetKeepAliveInterval();
        return this.connection.send(message);
    };
    /**
     * Sends a js object to the server.
     * @param message The js object to serialize and send.
     */
    HubConnection.prototype.sendWithProtocol = function (message) {
        return this.sendMessage(this.protocol.writeMessage(message));
    };
    /** Invokes a hub method on the server using the specified name and arguments. Does not wait for a response from the receiver.
     *
     * The Promise returned by this method resolves when the client has sent the invocation to the server. The server may still
     * be processing the invocation.
     *
     * @param {string} methodName The name of the server method to invoke.
     * @param {any[]} args The arguments used to invoke the server method.
     * @returns {Promise<void>} A Promise that resolves when the invocation has been successfully sent, or rejects with an error.
     */
    HubConnection.prototype.send = function (methodName) {
        var args = [];
        for (var _i = 1; _i < arguments.length; _i++) {
            args[_i - 1] = arguments[_i];
        }
        var _a = this.replaceStreamingParams(args), streams = _a[0], streamIds = _a[1];
        var sendPromise = this.sendWithProtocol(this.createInvocation(methodName, args, true, streamIds));
        this.launchStreams(streams, sendPromise);
        return sendPromise;
    };
    /** Invokes a hub method on the server using the specified name and arguments.
     *
     * The Promise returned by this method resolves when the server indicates it has finished invoking the method. When the promise
     * resolves, the server has finished invoking the method. If the server method returns a result, it is produced as the result of
     * resolving the Promise.
     *
     * @typeparam T The expected return type.
     * @param {string} methodName The name of the server method to invoke.
     * @param {any[]} args The arguments used to invoke the server method.
     * @returns {Promise<T>} A Promise that resolves with the result of the server method (if any), or rejects with an error.
     */
    HubConnection.prototype.invoke = function (methodName) {
        var _this = this;
        var args = [];
        for (var _i = 1; _i < arguments.length; _i++) {
            args[_i - 1] = arguments[_i];
        }
        var _a = this.replaceStreamingParams(args), streams = _a[0], streamIds = _a[1];
        var invocationDescriptor = this.createInvocation(methodName, args, false, streamIds);
        var p = new Promise(function (resolve, reject) {
            // invocationId will always have a value for a non-blocking invocation
            _this.callbacks[invocationDescriptor.invocationId] = function (invocationEvent, error) {
                if (error) {
                    reject(error);
                    return;
                }
                else if (invocationEvent) {
                    // invocationEvent will not be null when an error is not passed to the callback
                    if (invocationEvent.type === MessageType.Completion) {
                        if (invocationEvent.error) {
                            reject(new Error(invocationEvent.error));
                        }
                        else {
                            resolve(invocationEvent.result);
                        }
                    }
                    else {
                        reject(new Error("Unexpected message type: " + invocationEvent.type));
                    }
                }
            };
            var promiseQueue = _this.sendWithProtocol(invocationDescriptor)
                .catch(function (e) {
                reject(e);
                // invocationId will always have a value for a non-blocking invocation
                delete _this.callbacks[invocationDescriptor.invocationId];
            });
            _this.launchStreams(streams, promiseQueue);
        });
        return p;
    };
    /** Registers a handler that will be invoked when the hub method with the specified method name is invoked.
     *
     * @param {string} methodName The name of the hub method to define.
     * @param {Function} newMethod The handler that will be raised when the hub method is invoked.
     */
    HubConnection.prototype.on = function (methodName, newMethod) {
        if (!methodName || !newMethod) {
            return;
        }
        methodName = methodName.toLowerCase();
        if (!this.methods[methodName]) {
            this.methods[methodName] = [];
        }
        // Preventing adding the same handler multiple times.
        if (this.methods[methodName].indexOf(newMethod) !== -1) {
            return;
        }
        this.methods[methodName].push(newMethod);
    };
    HubConnection.prototype.off = function (methodName, method) {
        if (!methodName) {
            return;
        }
        methodName = methodName.toLowerCase();
        var handlers = this.methods[methodName];
        if (!handlers) {
            return;
        }
        if (method) {
            var removeIdx = handlers.indexOf(method);
            if (removeIdx !== -1) {
                handlers.splice(removeIdx, 1);
                if (handlers.length === 0) {
                    delete this.methods[methodName];
                }
            }
        }
        else {
            delete this.methods[methodName];
        }
    };
    /** Registers a handler that will be invoked when the connection is closed.
     *
     * @param {Function} callback The handler that will be invoked when the connection is closed. Optionally receives a single argument containing the error that caused the connection to close (if any).
     */
    HubConnection.prototype.onclose = function (callback) {
        if (callback) {
            this.closedCallbacks.push(callback);
        }
    };
    /** Registers a handler that will be invoked when the connection starts reconnecting.
     *
     * @param {Function} callback The handler that will be invoked when the connection starts reconnecting. Optionally receives a single argument containing the error that caused the connection to start reconnecting (if any).
     */
    HubConnection.prototype.onreconnecting = function (callback) {
        if (callback) {
            this.reconnectingCallbacks.push(callback);
        }
    };
    /** Registers a handler that will be invoked when the connection successfully reconnects.
     *
     * @param {Function} callback The handler that will be invoked when the connection successfully reconnects.
     */
    HubConnection.prototype.onreconnected = function (callback) {
        if (callback) {
            this.reconnectedCallbacks.push(callback);
        }
    };
    HubConnection.prototype.processIncomingData = function (data) {
        this.cleanupTimeout();
        if (!this.receivedHandshakeResponse) {
            data = this.processHandshakeResponse(data);
            this.receivedHandshakeResponse = true;
        }
        // Data may have all been read when processing handshake response
        if (data) {
            // Parse the messages
            var messages = this.protocol.parseMessages(data, this.logger);
            for (var _i = 0, messages_1 = messages; _i < messages_1.length; _i++) {
                var message = messages_1[_i];
                switch (message.type) {
                    case MessageType.Invocation:
                        this.invokeClientMethod(message);
                        break;
                    case MessageType.StreamItem:
                    case MessageType.Completion:
                        var callback = this.callbacks[message.invocationId];
                        if (callback) {
                            if (message.type === MessageType.Completion) {
                                delete this.callbacks[message.invocationId];
                            }
                            callback(message);
                        }
                        break;
                    case MessageType.Ping:
                        // Don't care about pings
                        break;
                    case MessageType.Close:
                        this.logger.log(LogLevel.Information, "Close message received from server.");
                        var error = message.error ? new Error("Server returned an error on close: " + message.error) : undefined;
                        if (message.allowReconnect === true) {
                            // It feels wrong not to await connection.stop() here, but processIncomingData is called as part of an onreceive callback which is not async,
                            // this is already the behavior for serverTimeout(), and HttpConnection.Stop() should catch and log all possible exceptions.
                            // tslint:disable-next-line:no-floating-promises
                            this.connection.stop(error);
                        }
                        else {
                            // We cannot await stopInternal() here, but subsequent calls to stop() will await this if stopInternal() is still ongoing.
                            this.stopPromise = this.stopInternal(error);
                        }
                        break;
                    default:
                        this.logger.log(LogLevel.Warning, "Invalid message type: " + message.type + ".");
                        break;
                }
            }
        }
        this.resetTimeoutPeriod();
    };
    HubConnection.prototype.processHandshakeResponse = function (data) {
        var _a;
        var responseMessage;
        var remainingData;
        try {
            _a = this.handshakeProtocol.parseHandshakeResponse(data), remainingData = _a[0], responseMessage = _a[1];
        }
        catch (e) {
            var message = "Error parsing handshake response: " + e;
            this.logger.log(LogLevel.Error, message);
            var error = new Error(message);
            this.handshakeRejecter(error);
            throw error;
        }
        if (responseMessage.error) {
            var message = "Server returned handshake error: " + responseMessage.error;
            this.logger.log(LogLevel.Error, message);
            var error = new Error(message);
            this.handshakeRejecter(error);
            throw error;
        }
        else {
            this.logger.log(LogLevel.Debug, "Server handshake complete.");
        }
        this.handshakeResolver();
        return remainingData;
    };
    HubConnection.prototype.resetKeepAliveInterval = function () {
        var _this = this;
        this.cleanupPingTimer();
        this.pingServerHandle = setTimeout(function () { return __awaiter(_this, void 0, void 0, function () {
            var _a;
            return __generator(this, function (_b) {
                switch (_b.label) {
                    case 0:
                        if (!(this.connectionState === HubConnectionState.Connected)) return [3 /*break*/, 4];
                        _b.label = 1;
                    case 1:
                        _b.trys.push([1, 3, , 4]);
                        return [4 /*yield*/, this.sendMessage(this.cachedPingMessage)];
                    case 2:
                        _b.sent();
                        return [3 /*break*/, 4];
                    case 3:
                        _a = _b.sent();
                        // We don't care about the error. It should be seen elsewhere in the client.
                        // The connection is probably in a bad or closed state now, cleanup the timer so it stops triggering
                        this.cleanupPingTimer();
                        return [3 /*break*/, 4];
                    case 4: return [2 /*return*/];
                }
            });
        }); }, this.keepAliveIntervalInMilliseconds);
    };
    HubConnection.prototype.resetTimeoutPeriod = function () {
        var _this = this;
        if (!this.connection.features || !this.connection.features.inherentKeepAlive) {
            // Set the timeout timer
            this.timeoutHandle = setTimeout(function () { return _this.serverTimeout(); }, this.serverTimeoutInMilliseconds);
        }
    };
    HubConnection.prototype.serverTimeout = function () {
        // The server hasn't talked to us in a while. It doesn't like us anymore ... :(
        // Terminate the connection, but we don't need to wait on the promise. This could trigger reconnecting.
        // tslint:disable-next-line:no-floating-promises
        this.connection.stop(new Error("Server timeout elapsed without receiving a message from the server."));
    };
    HubConnection.prototype.invokeClientMethod = function (invocationMessage) {
        var _this = this;
        var methods = this.methods[invocationMessage.target.toLowerCase()];
        if (methods) {
            try {
                methods.forEach(function (m) { return m.apply(_this, invocationMessage.arguments); });
            }
            catch (e) {
                this.logger.log(LogLevel.Error, "A callback for the method " + invocationMessage.target.toLowerCase() + " threw error '" + e + "'.");
            }
            if (invocationMessage.invocationId) {
                // This is not supported in v1. So we return an error to avoid blocking the server waiting for the response.
                var message = "Server requested a response, which is not supported in this version of the client.";
                this.logger.log(LogLevel.Error, message);
                // We don't want to wait on the stop itself.
                this.stopPromise = this.stopInternal(new Error(message));
            }
        }
        else {
            this.logger.log(LogLevel.Warning, "No client method with the name '" + invocationMessage.target + "' found.");
        }
    };
    HubConnection.prototype.connectionClosed = function (error) {
        this.logger.log(LogLevel.Debug, "HubConnection.connectionClosed(" + error + ") called while in state " + this.connectionState + ".");
        // Triggering this.handshakeRejecter is insufficient because it could already be resolved without the continuation having run yet.
        this.stopDuringStartError = this.stopDuringStartError || error || new Error("The underlying connection was closed before the hub handshake could complete.");
        // If the handshake is in progress, start will be waiting for the handshake promise, so we complete it.
        // If it has already completed, this should just noop.
        if (this.handshakeResolver) {
            this.handshakeResolver();
        }
        this.cancelCallbacksWithError(error || new Error("Invocation canceled due to the underlying connection being closed."));
        this.cleanupTimeout();
        this.cleanupPingTimer();
        if (this.connectionState === HubConnectionState.Disconnecting) {
            this.completeClose(error);
        }
        else if (this.connectionState === HubConnectionState.Connected && this.reconnectPolicy) {
            // tslint:disable-next-line:no-floating-promises
            this.reconnect(error);
        }
        else if (this.connectionState === HubConnectionState.Connected) {
            this.completeClose(error);
        }
        // If none of the above if conditions were true were called the HubConnection must be in either:
        // 1. The Connecting state in which case the handshakeResolver will complete it and stopDuringStartError will fail it.
        // 2. The Reconnecting state in which case the handshakeResolver will complete it and stopDuringStartError will fail the current reconnect attempt
        //    and potentially continue the reconnect() loop.
        // 3. The Disconnected state in which case we're already done.
    };
    HubConnection.prototype.completeClose = function (error) {
        var _this = this;
        if (this.connectionStarted) {
            this.connectionState = HubConnectionState.Disconnected;
            this.connectionStarted = false;
            try {
                this.closedCallbacks.forEach(function (c) { return c.apply(_this, [error]); });
            }
            catch (e) {
                this.logger.log(LogLevel.Error, "An onclose callback called with error '" + error + "' threw error '" + e + "'.");
            }
        }
    };
    HubConnection.prototype.reconnect = function (error) {
        return __awaiter(this, void 0, void 0, function () {
            var reconnectStartTime, previousReconnectAttempts, retryError, nextRetryDelay, e_4;
            var _this = this;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        reconnectStartTime = Date.now();
                        previousReconnectAttempts = 0;
                        retryError = error !== undefined ? error : new Error("Attempting to reconnect due to a unknown error.");
                        nextRetryDelay = this.getNextRetryDelay(previousReconnectAttempts++, 0, retryError);
                        if (nextRetryDelay === null) {
                            this.logger.log(LogLevel.Debug, "Connection not reconnecting because the IRetryPolicy returned null on the first reconnect attempt.");
                            this.completeClose(error);
                            return [2 /*return*/];
                        }
                        this.connectionState = HubConnectionState.Reconnecting;
                        if (error) {
                            this.logger.log(LogLevel.Information, "Connection reconnecting because of error '" + error + "'.");
                        }
                        else {
                            this.logger.log(LogLevel.Information, "Connection reconnecting.");
                        }
                        if (this.onreconnecting) {
                            try {
                                this.reconnectingCallbacks.forEach(function (c) { return c.apply(_this, [error]); });
                            }
                            catch (e) {
                                this.logger.log(LogLevel.Error, "An onreconnecting callback called with error '" + error + "' threw error '" + e + "'.");
                            }
                            // Exit early if an onreconnecting callback called connection.stop().
                            if (this.connectionState !== HubConnectionState.Reconnecting) {
                                this.logger.log(LogLevel.Debug, "Connection left the reconnecting state in onreconnecting callback. Done reconnecting.");
                                return [2 /*return*/];
                            }
                        }
                        _a.label = 1;
                    case 1:
                        if (!(nextRetryDelay !== null)) return [3 /*break*/, 7];
                        this.logger.log(LogLevel.Information, "Reconnect attempt number " + previousReconnectAttempts + " will start in " + nextRetryDelay + " ms.");
                        return [4 /*yield*/, new Promise(function (resolve) {
                                _this.reconnectDelayHandle = setTimeout(resolve, nextRetryDelay);
                            })];
                    case 2:
                        _a.sent();
                        this.reconnectDelayHandle = undefined;
                        if (this.connectionState !== HubConnectionState.Reconnecting) {
                            this.logger.log(LogLevel.Debug, "Connection left the reconnecting state during reconnect delay. Done reconnecting.");
                            return [2 /*return*/];
                        }
                        _a.label = 3;
                    case 3:
                        _a.trys.push([3, 5, , 6]);
                        return [4 /*yield*/, this.startInternal()];
                    case 4:
                        _a.sent();
                        this.connectionState = HubConnectionState.Connected;
                        this.logger.log(LogLevel.Information, "HubConnection reconnected successfully.");
                        if (this.onreconnected) {
                            try {
                                this.reconnectedCallbacks.forEach(function (c) { return c.apply(_this, [_this.connection.connectionId]); });
                            }
                            catch (e) {
                                this.logger.log(LogLevel.Error, "An onreconnected callback called with connectionId '" + this.connection.connectionId + "; threw error '" + e + "'.");
                            }
                        }
                        return [2 /*return*/];
                    case 5:
                        e_4 = _a.sent();
                        this.logger.log(LogLevel.Information, "Reconnect attempt failed because of error '" + e_4 + "'.");
                        if (this.connectionState !== HubConnectionState.Reconnecting) {
                            this.logger.log(LogLevel.Debug, "Connection left the reconnecting state during reconnect attempt. Done reconnecting.");
                            return [2 /*return*/];
                        }
                        retryError = e_4 instanceof Error ? e_4 : new Error(e_4.toString());
                        nextRetryDelay = this.getNextRetryDelay(previousReconnectAttempts++, Date.now() - reconnectStartTime, retryError);
                        return [3 /*break*/, 6];
                    case 6: return [3 /*break*/, 1];
                    case 7:
                        this.logger.log(LogLevel.Information, "Reconnect retries have been exhausted after " + (Date.now() - reconnectStartTime) + " ms and " + previousReconnectAttempts + " failed attempts. Connection disconnecting.");
                        this.completeClose();
                        return [2 /*return*/];
                }
            });
        });
    };
    HubConnection.prototype.getNextRetryDelay = function (previousRetryCount, elapsedMilliseconds, retryReason) {
        try {
            return this.reconnectPolicy.nextRetryDelayInMilliseconds({
                elapsedMilliseconds: elapsedMilliseconds,
                previousRetryCount: previousRetryCount,
                retryReason: retryReason,
            });
        }
        catch (e) {
            this.logger.log(LogLevel.Error, "IRetryPolicy.nextRetryDelayInMilliseconds(" + previousRetryCount + ", " + elapsedMilliseconds + ") threw error '" + e + "'.");
            return null;
        }
    };
    HubConnection.prototype.cancelCallbacksWithError = function (error) {
        var callbacks = this.callbacks;
        this.callbacks = {};
        Object.keys(callbacks)
            .forEach(function (key) {
            var callback = callbacks[key];
            callback(null, error);
        });
    };
    HubConnection.prototype.cleanupPingTimer = function () {
        if (this.pingServerHandle) {
            clearTimeout(this.pingServerHandle);
        }
    };
    HubConnection.prototype.cleanupTimeout = function () {
        if (this.timeoutHandle) {
            clearTimeout(this.timeoutHandle);
        }
    };
    HubConnection.prototype.createInvocation = function (methodName, args, nonblocking, streamIds) {
        if (nonblocking) {
            return {
                arguments: args,
                streamIds: streamIds,
                target: methodName,
                type: MessageType.Invocation,
            };
        }
        else {
            var invocationId = this.invocationId;
            this.invocationId++;
            return {
                arguments: args,
                invocationId: invocationId.toString(),
                streamIds: streamIds,
                target: methodName,
                type: MessageType.Invocation,
            };
        }
    };
    HubConnection.prototype.launchStreams = function (streams, promiseQueue) {
        var _this = this;
        if (streams.length === 0) {
            return;
        }
        // Synchronize stream data so they arrive in-order on the server
        if (!promiseQueue) {
            promiseQueue = Promise.resolve();
        }
        var _loop_1 = function (streamId) {
            streams[streamId].subscribe({
                complete: function () {
                    promiseQueue = promiseQueue.then(function () { return _this.sendWithProtocol(_this.createCompletionMessage(streamId)); });
                },
                error: function (err) {
                    var message;
                    if (err instanceof Error) {
                        message = err.message;
                    }
                    else if (err && err.toString) {
                        message = err.toString();
                    }
                    else {
                        message = "Unknown error";
                    }
                    promiseQueue = promiseQueue.then(function () { return _this.sendWithProtocol(_this.createCompletionMessage(streamId, message)); });
                },
                next: function (item) {
                    promiseQueue = promiseQueue.then(function () { return _this.sendWithProtocol(_this.createStreamItemMessage(streamId, item)); });
                },
            });
        };
        // We want to iterate over the keys, since the keys are the stream ids
        // tslint:disable-next-line:forin
        for (var streamId in streams) {
            _loop_1(streamId);
        }
    };
    HubConnection.prototype.replaceStreamingParams = function (args) {
        var streams = [];
        var streamIds = [];
        for (var i = 0; i < args.length; i++) {
            var argument = args[i];
            if (this.isObservable(argument)) {
                var streamId = this.invocationId;
                this.invocationId++;
                // Store the stream for later use
                streams[streamId] = argument;
                streamIds.push(streamId.toString());
                // remove stream from args
                args.splice(i, 1);
            }
        }
        return [streams, streamIds];
    };
    HubConnection.prototype.isObservable = function (arg) {
        // This allows other stream implementations to just work (like rxjs)
        return arg && arg.subscribe && typeof arg.subscribe === "function";
    };
    HubConnection.prototype.createStreamInvocation = function (methodName, args, streamIds) {
        var invocationId = this.invocationId;
        this.invocationId++;
        return {
            arguments: args,
            invocationId: invocationId.toString(),
            streamIds: streamIds,
            target: methodName,
            type: MessageType.StreamInvocation,
        };
    };
    HubConnection.prototype.createCancelInvocation = function (id) {
        return {
            invocationId: id,
            type: MessageType.CancelInvocation,
        };
    };
    HubConnection.prototype.createStreamItemMessage = function (id, item) {
        return {
            invocationId: id,
            item: item,
            type: MessageType.StreamItem,
        };
    };
    HubConnection.prototype.createCompletionMessage = function (id, error, result) {
        if (error) {
            return {
                error: error,
                invocationId: id,
                type: MessageType.Completion,
            };
        }
        return {
            invocationId: id,
            result: result,
            type: MessageType.Completion,
        };
    };
    return HubConnection;
}());
export { HubConnection };
//# sourceMappingURL=HubConnection.js.map