@page "/register"
@layout AuthLayout
@using Microsoft.AspNetCore.Identity
@inject UserManager<ApplicationUser> UserManager
@inject SignInManager<ApplicationUser> SignInManager
@inject NavigationManager Navigation

<PageTitle>Budgeteer Beta — Register</PageTitle>

<h3 class="text-center mb-4">Create Account</h3>

<EditForm Model="Model" OnValidSubmit="HandleRegister" FormName="register">
    <DataAnnotationsValidator />

    @if (!string.IsNullOrEmpty(errorMessage))
    {
        <div class="alert alert-danger">@errorMessage</div>
    }

    <div class="mb-3">
        <label class="form-label">Email</label>
        <InputText @bind-Value="Model.Email" class="form-control" placeholder="you@example.com" />
        <ValidationMessage For="() => Model.Email" />
    </div>

    <div class="mb-3">
        <label class="form-label">Password</label>
        <InputText @bind-Value="Model.Password" type="password" class="form-control" placeholder="At least 8 characters" />
        <ValidationMessage For="() => Model.Password" />
    </div>

    <div class="mb-3">
        <label class="form-label">Confirm Password</label>
        <InputText @bind-Value="Model.ConfirmPassword" type="password" class="form-control" />
        <ValidationMessage For="() => Model.ConfirmPassword" />
    </div>

    <button type="submit" class="btn btn-primary w-100">Register</button>
</EditForm>

<p class="text-center mt-3">
    Already have an account? <a href="/login">Sign in</a>
</p>

@code {
    [SupplyParameterFromForm]
    private RegisterModel Model { get; set; } = new();

    private string? errorMessage;

    private async Task HandleRegister()
    {
        errorMessage = null;

        var user = new ApplicationUser { UserName = Model.Email, Email = Model.Email };
        var result = await UserManager.CreateAsync(user, Model.Password);

        if (result.Succeeded)
        {
            await SignInManager.SignInAsync(user, isPersistent: false);
            Navigation.NavigateTo("/", forceLoad: true);
        }
        else
        {
            errorMessage = string.Join(" ", result.Errors.Select(e => e.Description));
        }
    }

    private sealed class RegisterModel
    {
        [System.ComponentModel.DataAnnotations.Required(ErrorMessage = "Email is required")]
        [System.ComponentModel.DataAnnotations.EmailAddress(ErrorMessage = "Invalid email address")]
        public string Email { get; set; } = string.Empty;

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

        [System.ComponentModel.DataAnnotations.Required(ErrorMessage = "Please confirm your password")]
        [System.ComponentModel.DataAnnotations.Compare(nameof(Password), ErrorMessage = "Passwords do not match")]
        public string ConfirmPassword { get; set; } = string.Empty;
    }
}