chapter-organizer/WebApp/Components/Login.razor

@page "/login"
@using System.ComponentModel.DataAnnotations
@using WebApp.Authentication
@inject NavigationManager Navigation
@inject LoginRateLimitService RateLimitService
@inject IHttpContextAccessor HttpContextAccessor

<div class="d-flex justify-center align-center" style="min-height: 100vh;">
    <MudPaper Elevation="3" Class="pa-8" MaxWidth="400px" Style="width: 100%;">
        <MudText Typo="Typo.h4" Align="Align.Center" GutterBottom="true">
            TSA Chapter Organizer
        </MudText>
        <MudText Typo="Typo.h6" Align="Align.Center" GutterBottom="true" Class="mb-6">
            Sign In
        </MudText>

        @if (!string.IsNullOrEmpty(_errorMessage))
        {
            <MudAlert Severity="Severity.Error" Class="mb-4">@_errorMessage</MudAlert>
        }

        <EditForm Model="@_loginModel" OnValidSubmit="HandleLogin">
            <DataAnnotationsValidator />

            <MudTextField @bind-Value="_loginModel.Email"
                          Label="Email"
                          Variant="Variant.Outlined"
                          InputType="InputType.Email"
                          Required="true"
                          Class="mb-4"
                          Disabled="@_isSubmitting"
                          For="@(() => _loginModel.Email)" />

            <MudTextField @bind-Value="_loginModel.Password"
                          Label="Password"
                          Variant="Variant.Outlined"
                          InputType="@_passwordInput"
                          Required="true"
                          Class="mb-4"
                          Disabled="@_isSubmitting"
                          Adornment="Adornment.End"
                          AdornmentIcon="@_passwordInputIcon"
                          OnAdornmentClick="TogglePasswordVisibility"
                          For="@(() => _loginModel.Password)" />

            <div class="d-flex justify-space-between align-center mb-4">
                <MudCheckBox @bind-Value="_loginModel.RememberMe"
                             Label="Remember me?"
                             Color="Color.Primary"
                             Disabled="@_isSubmitting" />
            </div>

            <MudButton ButtonType="ButtonType.Submit"
                       Variant="Variant.Filled"
                       Color="Color.Primary"
                       Size="Size.Large"
                       FullWidth="true"
                       Disabled="@_isSubmitting">
                @if (_isSubmitting)
                {
                    <MudProgressCircular Size="Size.Small" Indeterminate="true" Class="mr-2" />
                    <span>Signing in...</span>
                }
                else
                {
                    <span>Sign In</span>
                }
            </MudButton>
        </EditForm>
    </MudPaper>
</div>

@code {
    private LoginModel _loginModel = new();
    private string? _errorMessage;
    private bool _isSubmitting = false;
    private bool _passwordVisibility;
    private InputType _passwordInput = InputType.Password;
    private string _passwordInputIcon = Icons.Material.Filled.VisibilityOff;

    private class LoginModel
    {
        [Required(ErrorMessage = "Email is required")]
        [EmailAddress(ErrorMessage = "Invalid email format")]
        public string Email { get; set; } = string.Empty;

        [Required(ErrorMessage = "Password is required")]
        [MinLength(8, ErrorMessage = "Password must be at least 8 characters")]
        public string Password { get; set; } = string.Empty;

        public bool RememberMe { get; set; }
    }

    private void TogglePasswordVisibility()
    {
        if (_isSubmitting) return;

        _passwordVisibility = !_passwordVisibility;
        _passwordInputIcon = _passwordVisibility
            ? Icons.Material.Filled.Visibility
            : Icons.Material.Filled.VisibilityOff;
        _passwordInput = _passwordVisibility
            ? InputType.Text
            : InputType.Password;
    }

    private async Task HandleLogin()
    {
        _isSubmitting = true;
        _errorMessage = null;

        try
        {
            // Get client IP address
            var ipAddress = HttpContextAccessor.HttpContext?.Connection.RemoteIpAddress?.ToString()
                ?? "unknown";

            // Check rate limiting
            if (RateLimitService.IsLockedOut(ipAddress))
            {
                var remaining = RateLimitService.GetRemainingLockoutTime(ipAddress);
                _errorMessage = $"Too many failed attempts. Please try again in {remaining?.Minutes ?? 15} minutes.";
                return;
            }

            // Navigate to controller endpoint with credentials
            var uri = $"/Auth/CookieLogin?email={Uri.EscapeDataString(_loginModel.Email)}" +
                      $"&password={Uri.EscapeDataString(_loginModel.Password)}" +
                      $"&rememberMe={_loginModel.RememberMe}";

            Navigation.NavigateTo(uri, forceLoad: true);
        }
        catch (Exception ex)
        {
            _errorMessage = "An error occurred during login. Please try again.";
            Console.WriteLine($"Login error: {ex}");
        }
        finally
        {
            _isSubmitting = false;
        }
    }
}