// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

import { HttpClient } from "./HttpClient";
import { MessageHeaders } from "./IHubProtocol";
import { ILogger, LogLevel } from "./ILogger";
import { HttpTransportType, ITransport } from "./ITransport";
import { EventSourceConstructor, WebSocketConstructor } from "./Polyfills";

/** Options provided to the 'withUrl' method on {@link @microsoft/signalr.HubConnectionBuilder} to configure options for the HTTP-based transports. */
export interface IHttpConnectionOptions {
    /** {@link @microsoft/signalr.MessageHeaders} containing custom headers to be sent with every HTTP request. Note, setting headers in the browser will not work for WebSockets or the ServerSentEvents stream. */
    headers?: MessageHeaders;

    /** An {@link @microsoft/signalr.HttpClient} that will be used to make HTTP requests. */
    httpClient?: HttpClient;

    /** An {@link @microsoft/signalr.HttpTransportType} value specifying the transport to use for the connection. */
    transport?: HttpTransportType | ITransport;

    /** Configures the logger used for logging.
     *
     * Provide an {@link @microsoft/signalr.ILogger} instance, and log messages will be logged via that instance. Alternatively, provide a value from
     * the {@link @microsoft/signalr.LogLevel} enumeration and a default logger which logs to the Console will be configured to log messages of the specified
     * level (or higher).
     */
    logger?: ILogger | LogLevel;

    /** A function that provides an access token required for HTTP Bearer authentication.
     *
     * @returns {string | Promise<string>} A string containing the access token, or a Promise that resolves to a string containing the access token.
     */
    accessTokenFactory?(): string | Promise<string>;

    /** A boolean indicating if message content should be logged.
     *
     * Message content can contain sensitive user data, so this is disabled by default.
     */
    logMessageContent?: boolean;

    /** A boolean indicating if negotiation should be skipped.
     *
     * Negotiation can only be skipped when the {@link @microsoft/signalr.IHttpConnectionOptions.transport} property is set to 'HttpTransportType.WebSockets'.
     */
    skipNegotiation?: boolean;

    // Used for unit testing and code spelunkers
    /** A constructor that can be used to create a WebSocket.
     *
     * @internal
     */
    WebSocket?: WebSocketConstructor;

    // Used for unit testing and code spelunkers
    /** A constructor that can be used to create an EventSource.
     *
     * @internal
     */
    EventSource?: EventSourceConstructor;

    /**
     * Default value is 'true'.
     * This controls whether credentials such as cookies are sent in cross-site requests.
     *
     * Cookies are used by many load-balancers for sticky sessions which is required when your app is deployed with multiple servers.
     */
    withCredentials?: boolean;

    /**
     * Default value is 100,000 milliseconds.
     * Timeout to apply to Http requests.
     *
     * This will not apply to Long Polling poll requests, EventSource, or WebSockets.
     */
    timeout?: number;
}