using System;

namespace HC3;

/// <summary>
/// A node that performs an action after a specified time period, with a condition check.
/// </summary>
public class TimedActionNode : Node
{
	private readonly string _reason;
	private readonly float _duration;
	private readonly Func<bool> _conditionCheck;
	private readonly Action _onComplete;
	private TimeUntil _timer;
	private bool _started;
	private readonly string _icon;

	/// <summary>
	/// Creates a node that performs an action after a delay
	/// </summary>
	/// <param name="duration">How long to wait before completing the action</param>
	/// <param name="onComplete">Action to perform when timer completes</param>
	/// <param name="conditionCheck">Optional condition that must be true for the action to continue</param>
	/// <param name="reason">Display reason for this timed action</param>
	/// <param name="icon">Material icon to display</param>
	public TimedActionNode( float duration, Action onComplete, Func<bool> conditionCheck = null, string reason = "Waiting...", string icon = "timer" )
	{
		_duration = duration;
		_onComplete = onComplete;
		_conditionCheck = conditionCheck ?? (() => true);
		_reason = reason;
		_icon = icon;
	}

	protected override void OnStart()
	{
		_timer = _duration;
		_started = true;
	}

	public override Status Tick()
	{
		// If condition check fails, return failure
		if ( !_conditionCheck() )
			return Status.Failure;

		// Wait for timer to complete
		if ( !_timer )
		{
			if ( _started )
			{
				_onComplete?.Invoke();
				_started = false;
			}
			return Status.Success;
		}

		return Status.Running;
	}

	public override ActionDisplayInfo? GetDisplay()
	{
		float progress = 1f - (_timer / _duration).Clamp( 0f, 1f );
		return new ActionDisplayInfo( _icon, _reason, progress );
	}
}