// 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.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using Microsoft.Extensions.Logging;

namespace Microsoft.AspNetCore.Identity.UI.V3.Pages.Account.Manage.Internal

{
    /// <summary>
    ///     This API supports the ASP.NET Core Identity default UI infrastructure and is not intended to be used
    ///     directly from your code. This API may change or be removed in future releases.
    /// </summary>
    [IdentityDefaultUI(typeof(ResetAuthenticatorModel<>))]
    public abstract class ResetAuthenticatorModel : PageModel
    {
        /// <summary>
        ///     This API supports the ASP.NET Core Identity default UI infrastructure and is not intended to be used
        ///     directly from your code. This API may change or be removed in future releases.
        /// </summary>
        [TempData]
        public string StatusMessage { get; set; }

        /// <summary>
        ///     This API supports the ASP.NET Core Identity default UI infrastructure and is not intended to be used
        ///     directly from your code. This API may change or be removed in future releases.
        /// </summary>
        public virtual Task<IActionResult> OnGet() => throw new NotImplementedException();

        /// <summary>
        ///     This API supports the ASP.NET Core Identity default UI infrastructure and is not intended to be used
        ///     directly from your code. This API may change or be removed in future releases.
        /// </summary>
        public virtual Task<IActionResult> OnPostAsync() => throw new NotImplementedException();
    }

    internal class ResetAuthenticatorModel<TUser> : ResetAuthenticatorModel where TUser : class
    {
        UserManager<TUser> _userManager;
        private readonly SignInManager<TUser> _signInManager;
        ILogger<ResetAuthenticatorModel> _logger;

        public ResetAuthenticatorModel(
            UserManager<TUser> userManager,
            SignInManager<TUser> signInManager,
            ILogger<ResetAuthenticatorModel> logger)
        {
            _userManager = userManager;
            _signInManager = signInManager;
            _logger = logger;
        }

        public override async Task<IActionResult> OnGet()
        {
            var user = await _userManager.GetUserAsync(User);
            if (user == null)
            {
                return NotFound($"Unable to load user with ID '{_userManager.GetUserId(User)}'.");
            }

            return Page();
        }

        public override async Task<IActionResult> OnPostAsync()
        {
            var user = await _userManager.GetUserAsync(User);
            if (user == null)
            {
                return NotFound($"Unable to load user with ID '{_userManager.GetUserId(User)}'.");
            }

            await _userManager.SetTwoFactorEnabledAsync(user, false);
            await _userManager.ResetAuthenticatorKeyAsync(user);
            var userId = await _userManager.GetUserIdAsync(user);
            _logger.LogInformation("User with ID '{UserId}' has reset their authentication app key.", userId);

            await _signInManager.RefreshSignInAsync(user);
            StatusMessage = "Your authenticator app key has been reset, you will need to configure your authenticator app using the new key.";

            return RedirectToPage("./EnableAuthenticator");
        }
    }
}