// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using Microsoft.Extensions.Logging;
 
namespace Microsoft.AspNetCore.Identity.UI.V4.Pages.Account.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>
[AllowAnonymous]
[IdentityDefaultUI(typeof(LogoutModel<>))]
public abstract class LogoutModel : 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>
    public void OnGet()
    {
    }
 
    /// <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> OnPost(string? returnUrl = null) => throw new NotImplementedException();
}
 
internal sealed class LogoutModel<TUser> : LogoutModel where TUser : class
{
    private readonly SignInManager<TUser> _signInManager;
    private readonly ILogger<LogoutModel> _logger;
 
    public LogoutModel(SignInManager<TUser> signInManager, ILogger<LogoutModel> logger)
    {
        _signInManager = signInManager;
        _logger = logger;
    }
 
    public override async Task<IActionResult> OnPost(string? returnUrl = null)
    {
        await _signInManager.SignOutAsync();
        _logger.LogInformation(LoggerEventIds.UserLoggedOut, "User logged out.");
        if (returnUrl != null)
        {
            return LocalRedirect(returnUrl);
        }
        else
        {
            // This needs to be a redirect so that the browser performs a new
            // request and the identity for the user gets updated.
            return RedirectToPage();
        }
    }
}