@using GPW.CORE.Services
@inject NavigationManager Nav
@inject RouteModeService RouteModeSvc

<span class="page-mode-indicator" title="@Title">
    @if (displayMode == RouteMode.ServerOnly)
    {
        <span class="text-danger" title="Server">🖥️</span>
    }
    else if (displayMode == RouteMode.ClientOnly)
    {
        @if (isBrowser)
        {
            <span class="text-success" title="WASM">🟢</span>
        }
        else
        {
            <span class="text-warning" title="Client (prerender)">🟡</span>
        }
    }
    else
    {
        <span class="text-info" title="Hybrid">🔀</span>
    }
</span>

@code {
    private RouteMode displayMode = RouteMode.Hybrid;
    private bool isBrowser;
    private string? Title;
    private IDisposable? _subscription;

    protected override void OnInitialized()
    {
        isBrowser = OperatingSystem.IsBrowser();
        _subscription = RouteModeSvc.Subscribe(() => InvokeAsync(() =>
        {
            UpdateForCurrentUri();
            StateHasChanged();
        }));
        UpdateForCurrentUri();
    }

    protected override Task OnAfterRenderAsync(bool firstRender)
    {
        isBrowser = OperatingSystem.IsBrowser();
        return base.OnAfterRenderAsync(firstRender);
    }

    private void UpdateForCurrentUri()
    {
        var uri = Nav.ToBaseRelativePath(Nav.Uri).Split('?')[0].Trim().TrimStart('/').ToLowerInvariant();
        var mode = RouteModeSvc.GetModeFor(uri);
        displayMode = mode ?? RouteMode.Hybrid;
        Title = displayMode switch
        {
            RouteMode.ServerOnly => "Pagina Server Only",
            RouteMode.ClientOnly => "Pagina Client Only",
            _ => "Pagina Hybrid"
        };
    }

    public void Dispose()
    {
        _subscription?.Dispose();
    }
}