@page "/login"
@using Microsoft.Extensions.Logging
@using SteUp.Shared.Core.BarcodeReader.Contracts
@using SteUp.Shared.Core.Interface.System
@using SteUp.Shared.Core.Services
@inject IUserAccountService UserAccountService
@inject AppAuthenticationStateProvider AuthenticationStateProvider
@inject IGenericSystemService GenericSystemService
@inject IBarcodeManager BarcodeManager
@inject ILogger<LoginPage> Logger

@*
    Accesso (STILE_UI §7): stessa struttura dell'app, registro diverso.
    Niente accento cromatico — l'attenzione sta sul marchio; il corallo torna
    dentro l'app, dove significa "qui si agisce".
*@

<div class="onboarding">
    <form class="onboarding__panel" @onsubmit="SignInUser" @onsubmit:preventDefault="true">
        <img src="_content/SteUp.Shared/images/logo_steup.svg" class="onboarding__logo" alt="SteUP"/>

        <div class="onboarding__fields">
            <div class="onboarding__field">
                <MudTextField @bind-Value="UserData.Username" Label="Username"
                              Variant="Variant.Text" Immediate="true"
                              UserAttributes="@(new() { ["autocomplete"] = "username", ["enterkeyhint"] = "next", ["autocapitalize"] = "none" })"/>
            </div>

            <div class="onboarding__field">
                <MudTextField InputType="@_passwordInput" @bind-Value="UserData.Password" Label="Password"
                              Variant="Variant.Text" Immediate="true"
                              Adornment="Adornment.End" AdornmentIcon="@_passwordInputIcon"
                              OnAdornmentClick="ShowPassword"
                              AdornmentAriaLabel="@(_isShow ? "Nascondi la password" : "Mostra la password")"
                              UserAttributes="@(new() { ["autocomplete"] = "current-password", ["enterkeyhint"] = "next" })"/>
            </div>

            <div class="onboarding__field">
                <MudTextField @bind-Value="UserData.CodHash" Label="Profilo azienda"
                              Variant="Variant.Text" Immediate="true"
                              UserAttributes="@(new() { ["autocomplete"] = "organization", ["enterkeyhint"] = "go", ["autocapitalize"] = "none" })"/>
            </div>
        </div>

        @if (_attemptFailed)
        {
            <p class="onboarding__error" role="alert" aria-live="assertive">@ErrorMessage</p>
        }

        <button type="submit" class="onboarding__submit" disabled="@(_busy || !CanSubmit)">
            @if (_busy)
            {
                <span class="onboarding__spinner" aria-hidden="true"></span>
                <span>Accesso in corso…</span>
            }
            else
            {
                <span>Accedi</span>
            }
        </button>

        <div class="onboarding__footer">
            <span>@GenericSystemService.GetCurrentAppVersion() · Powered by</span>
            <img src="_content/SteUp.Shared/images/logoIntegry.svg" alt="Integry"/>
        </div>
    </form>
</div>

@code {
    private SignIn UserData { get; } = new();
    private string ErrorMessage { get; set; } = "";
    private bool _attemptFailed;
    private bool _busy;

    private bool _isShow;
    private InputType _passwordInput = InputType.Password;
    private string _passwordInputIcon = Icons.Material.Rounded.VisibilityOff;

    private bool CanSubmit =>
        !string.IsNullOrWhiteSpace(UserData.Username) &&
        !string.IsNullOrWhiteSpace(UserData.Password) &&
        !string.IsNullOrWhiteSpace(UserData.CodHash);

    private void ShowPassword()
    {
        _isShow = !_isShow;
        _passwordInputIcon = _isShow ? Icons.Material.Rounded.Visibility : Icons.Material.Rounded.VisibilityOff;
        _passwordInput = _isShow ? InputType.Text : InputType.Password;
    }

    protected override void OnInitialized()
    {
        UserData.CodHash = LocalStorage.GetString("codHash");
        StateHasChanged();
    }

    private async Task SignInUser()
    {
        if (_busy || !CanSubmit) return;

        _attemptFailed = false;
        _busy = true;
        StateHasChanged();

        try
        {
            SteupDataService.RegisterAppVersion();
            await UserAccountService.Login(UserData.Username!, UserData.Password!, UserData.CodHash!);
            AuthenticationStateProvider.NotifyAuthenticationState(); //Chiamato per forzare il refresh
            await SteupDataService.Init();
            BarcodeManager.Init();

            LocalStorage.SetString("codHash", UserData.CodHash!);
            NavigationManager.NavigateTo("/");
        }
        catch (Exception e)
        {
            ErrorMessage = e.Message;
            Logger.LogError(e, ErrorMessage);

            _attemptFailed = true;
        }
        finally
        {
            _busy = false;
            StateHasChanged();
        }
    }

    public class SignIn
    {
        public string? Username { get; set; }
        public string? Password { get; set; }
        public string? CodHash { get; set; }
    }

}