// 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.Collections.Generic;
using System.ComponentModel;
using Microsoft.AspNetCore.Authentication;
using Microsoft.AspNetCore.Authentication.OAuth;
using Microsoft.AspNetCore.Http.Authentication;

namespace Microsoft.AspNetCore.Builder
{
    /// <summary>
    /// Configuration options for <see cref="OAuthMiddleware{T}"/>.
    /// </summary>
    public class OAuthOptions : RemoteAuthenticationOptions
    {
        public OAuthOptions()
        {
            Events = new OAuthEvents();
        }

        /// <summary>
        /// Gets or sets the provider-assigned client id.
        /// </summary>
        public string ClientId { get; set; }

        /// <summary>
        /// Gets or sets the provider-assigned client secret.
        /// </summary>
        public string ClientSecret { get; set; }

        /// <summary>
        /// Gets or sets the URI where the client will be redirected to authenticate.
        /// </summary>
        public string AuthorizationEndpoint { get; set; }

        /// <summary>
        /// Gets or sets the URI the middleware will access to exchange the OAuth token.
        /// </summary>
        public string TokenEndpoint { get; set; }

        /// <summary>
        /// Gets or sets the URI the middleware will access to obtain the user information.
        /// This value is not used in the default implementation, it is for use in custom implementations of
        /// IOAuthAuthenticationEvents.Authenticated or OAuthAuthenticationHandler.CreateTicketAsync.
        /// </summary>
        public string UserInformationEndpoint { get; set; }

        /// <summary>
        /// Gets or sets the <see cref="IOAuthEvents"/> used to handle authentication events.
        /// </summary>
        public new IOAuthEvents Events
        {
            get { return (IOAuthEvents)base.Events; }
            set { base.Events = value; }
        }

        /// <summary>
        /// Gets the list of permissions to request.
        /// </summary>
        public ICollection<string> Scope { get; } = new HashSet<string>();

        /// <summary>
        /// Gets or sets the type used to secure data handled by the middleware.
        /// </summary>
        public ISecureDataFormat<AuthenticationProperties> StateDataFormat { get; set; }
    }
}