namespace BehaviorDesigner.Runtime.Tasks
{
	[TaskDescription("The sequence task is similar to an \"and\" operation. It will return failure as soon as one of its child tasks return failure. If a child task returns success then it will sequentially run the next task. If all child tasks return success then it will return success.")]
	[TaskIcon("{SkinColor}SequenceIcon.png")]
	[HelpURL("http://www.opsive.com/assets/BehaviorDesigner/documentation.php?id=25")]
	public class Sequence : Composite
	{
		private int currentChildIndex;

		private TaskStatus executionStatus;

		public override int CurrentChildIndex()
		{
			return currentChildIndex;
		}

		public override bool CanExecute()
		{
			return currentChildIndex < children.Count && executionStatus != TaskStatus.Failure;
		}

		public override void OnChildExecuted(TaskStatus childStatus)
		{
			currentChildIndex++;
			executionStatus = childStatus;
		}

		public override void OnConditionalAbort(int childIndex)
		{
			currentChildIndex = childIndex;
			executionStatus = TaskStatus.Inactive;
		}

		public override void OnEnd()
		{
			executionStatus = TaskStatus.Inactive;
			currentChildIndex = 0;
		}
	}
}