using System.Timers;
namespace PepperDash.Essentials.Core
{
	/// <summary>
	/// Represents a BoolFeedbackPulse
	/// </summary>
	public class BoolFeedbackPulse
	{
		/// <summary>
		/// Gets or sets the TimeoutMs
		/// </summary>
		public uint TimeoutMs { get; set; }

		/// <summary>
		/// Gets or sets the CanRetrigger
		/// </summary>
		public bool CanRetrigger { get; set; }

		/// <summary>
		/// Gets or sets the Feedback
		/// </summary>
		public BoolFeedback Feedback { get; private set; }
		Timer Timer;

		bool _BoolValue;

		/// <summary>
		/// Creates a non-retriggering one shot
		/// </summary>
		public BoolFeedbackPulse(uint timeoutMs)
			: this(timeoutMs, false)
		{
		}

		/// <summary>
		/// Create a retriggerable one shot by setting canRetrigger true
		/// </summary>
		public BoolFeedbackPulse(uint timeoutMs, bool canRetrigger)
		{
			TimeoutMs = timeoutMs;
			CanRetrigger = canRetrigger;
			Feedback = new BoolFeedback(() => _BoolValue);
		}

		/// <summary>
		/// Start method
		/// </summary>
		public void Start()
		{
			if (Timer == null)
			{
				_BoolValue = true;
				Feedback.FireUpdate();
				Timer = new Timer(TimeoutMs) { AutoReset = false };
				Timer.Elapsed += (s, e) =>
					{
						_BoolValue = false;
						Feedback.FireUpdate();
						Timer = null;
					};
				Timer.Start();
			}
			// Timer is running, if retrigger is set, reset it.
			else if (CanRetrigger)
			{
				Timer.Stop();
				Timer.Interval = TimeoutMs;
				Timer.Start();
			}
		}

		/// <summary>
		/// Cancel method
		/// </summary>
		public void Cancel()
		{
			if (Timer != null)
			{
				Timer.Stop();
				Timer.Interval = 1;
				Timer.Start();
			}
		}
	}
}