@* You may need the using *@
@* @using System.Globalization *@
@* @using System.ComponentModel.DataAnnotations *@
@code {
    // Model for the form to demonstrate validation
    public class WeekPickerTestModel
    {
        [Required(ErrorMessage = "Please select a week.")]
        public DateTime? SelectedWeek { get; set; } = null;

        public DateTime MinAllowedWeek { get; set; } = new DateTime(2023, 1, 1);
        public DateTime MaxAllowedWeek { get; set; } = new DateTime(2025, 12, 31);
    }

    private WeekPickerTestModel weekModel { get; set; } = new WeekPickerTestModel();

    /// <summary>
    /// Handles the valid form submission for the week picker example.
    /// </summary>
    private void HandleValidSubmitWeek()
    {
        Console.WriteLine($"Validation successful!");
        // The value output here is the value normalized by the component
        // (first day of the week according to the client's CurrentCulture).
        Console.WriteLine($"Selected week: {weekModel.SelectedWeek?.ToShortDateString()}");

        // Example of how you would extract the week number according to the current culture,
        // if you need it on the server or for internal logic:
        if (weekModel.SelectedWeek.HasValue)
        {
            var culture = CultureInfo.CurrentCulture; // Or the culture you want to use
            var weekNumber = culture.Calendar.GetWeekOfYear(
                weekModel.SelectedWeek.Value,
                culture.DateTimeFormat.CalendarWeekRule,
                culture.DateTimeFormat.FirstDayOfWeek
            );
            Console.WriteLine($"Week number according to {culture.Name}: {weekNumber}");
        }

        // Here you could send the data to a service or perform further logic
    }

    /// <summary>
    /// Resets the selected week in the form example.
    /// </summary>
    private void ResetWeekSelection()
    {
        // Create a new instance of the model to reset all its properties and clear validation state
        weekModel = new WeekPickerTestModel();
        //StateHasChanged(); // Force re-render to update UI
    }
}

// No specific C# property needed for this example as it uses DateTime.Today directly.
// If you wanted to bind it to a property, it would look like this:
// private DateTime? currentWeekDisplay = DateTime.Today;
// And the Razor would be: @@bind-Value="currentWeekDisplay"

@* You may need the using *@
@* @using System.Globalization *@
@* @using System.ComponentModel.DataAnnotations *@
@code {
    // For ValueChanged event example
    private DateTime? weekChangedValue = null;
            
    /// <summary>
    /// Event handler for the ValueChanged event of the P11WeekPicker.
    /// Updates the bound value and logs the change to the console.
    /// </summary>
    /// <param name="newWeek">The new nullable DateTime value.</param>
    private void OnWeekChanged(DateTime? newWeek)
    {
        weekChangedValue = newWeek;
        Console.WriteLine($"Week changed to: {newWeek?.ToString("yyyy-MM-dd", CultureInfo.CurrentCulture) ?? "null"}");
    }
}