namespace Shogi.UI.Shared.Modal
{
	/// <summary>
	/// An injectible service which can be invoked to display preset modals via the <Modals /> razor component.
	/// Only one modal me be visible at a time.
	/// </summary>
	public class ModalService
	{
		public event EventHandler<ModalVisibilityChangedEventArgs>? ModalVisibilityChangedEvent;

		public ModalService()
		{
		}

		public bool LoginModalIsVisible { get; private set; }
		public bool GuestAccountDescriptionIsVisible { get; private set; }

		public void ShowLoginModal()
		{
			SetAllVisibilitiesToFalse();
			LoginModalIsVisible = true;
			EmitCurrentState();
		}

		public void ShowGuestAccountDescriptionModal()
		{
			SetAllVisibilitiesToFalse();
			GuestAccountDescriptionIsVisible = true;
			EmitCurrentState();
		}

		public void HideAllModals()
		{
			SetAllVisibilitiesToFalse();
			EmitCurrentState();
		}

		private void EmitCurrentState()
		{
			ModalVisibilityChangedEvent?.Invoke(this, new()
			{
				LoginModalIsVisible = LoginModalIsVisible,
				GuestAccountDescriptionIsVisible = GuestAccountDescriptionIsVisible
			});
		}

		private void SetAllVisibilitiesToFalse()
		{
			LoginModalIsVisible = false;
			GuestAccountDescriptionIsVisible = false;
		}

	}
}