// 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.

using System;
using System.Collections.Generic;
using System.Security.Claims;
using System.Threading;
using Microsoft.AspNet.Http.Authentication;
using Microsoft.AspNet.Http.Features;

namespace Microsoft.AspNet.Http
{
    /// <summary>
    /// Encapsulates all HTTP-specific information about an individual HTTP request.
    /// </summary>
    public abstract class HttpContext
    {
        /// <summary>
        /// Gets the collection of HTTP features provided by the server and middleware available on this request.
        /// </summary>
        public abstract IFeatureCollection Features { get; }

        /// <summary>
        /// Gets the <see cref="HttpRequest"/> object for this request.
        /// </summary>
        public abstract HttpRequest Request { get; }

        /// <summary>
        /// Gets the <see cref="HttpResponse"/> object for this request.
        /// </summary>
        public abstract HttpResponse Response { get; }

        /// <summary>
        /// Gets information about the underlying connection for this request.
        /// </summary>
        public abstract ConnectionInfo Connection { get; }

        /// <summary>
        /// Gets an object that manages the establishment of WebSocket connections for this request.
        /// </summary>
        public abstract WebSocketManager WebSockets { get; }

        /// <summary>
        /// Gets an object that facilitates authentication for this request.
        /// </summary>
        public abstract AuthenticationManager Authentication { get; }

        /// <summary>
        /// Gets or sets the the user for this request.
        /// </summary>
        public abstract ClaimsPrincipal User { get; set; }

        /// <summary>
        /// Gets or sets a key/value collection that can be used to share data within the scope of this request.
        /// </summary>
        public abstract IDictionary<object, object> Items { get; set; }

        /// <summary>
        /// Gets or sets the <see cref="IServiceProvider"/> that provides access to the application's service container.
        /// </summary>
        public abstract IServiceProvider ApplicationServices { get; set; }

        /// <summary>
        /// Gets or sets the <see cref="IServiceProvider"/> that provides access to the request's service container.
        /// </summary>
        public abstract IServiceProvider RequestServices { get; set; }

        /// <summary>
        /// Notifies when the connection underlying this request is aborted and thus request operations should be
        /// cancelled.
        /// </summary>
        public abstract CancellationToken RequestAborted { get; set; }

        /// <summary>
        /// Gets or sets a unique identifier to represent this request in trace logs.
        /// </summary>
        public abstract string TraceIdentifier { get; set; }

        /// <summary>
        /// Gets or sets the object used to manage user session data for this request.
        /// </summary>
        public abstract ISession Session { get; set; }

        /// <summary>
        /// Aborts the connection underlying this request.
        /// </summary>
        public abstract void Abort();
    }
}