using System.Collections.Generic;
using UnityEngine;

namespace BehaviorDesigner.Runtime.Tasks.Movement
{
	[HelpURLAttribute("http://www.opsive.com/assets/BehaviorDesigner/Movement/documentation.php?id=18")]
	[TaskIcon("Assets/Behavior Designer Movement/Editor/Icons/{SkinColor}WithinDistanceIcon.png")]
	[TaskDescription("Check to see if the any object specified by the object list or tag is within the distance specified of the current agent.")]
	[TaskCategory("Movement")]
	public class WithinDistance : Conditional
	{
		[Tooltip("Should the 2D version be used?")]
		public bool usePhysics2D;

		[Tooltip("The distance that the object needs to be within")]
		public SharedFloat magnitude;

		[Tooltip("If true, the object must be within line of sight to be within distance. For example, if this option is enabled then an object behind a wall will not be within distance even though it may be physically close to the other object")]
		public SharedBool lineOfSight;

		[Tooltip("The LayerMask of the objects to ignore when performing the line of sight check")]
		public LayerMask ignoreLayerMask = 1 << LayerMask.NameToLayer("Ignore Raycast");

		[Tooltip("The offset relative to the pivot position")]
		public SharedVector3 offset;

		[Tooltip("The target offset relative to the pivot position")]
		public SharedVector3 targetOffset;

		[Tooltip("An array of objects to check to see if they are within distance")]
		public SharedGameObjectList objects;

		[Tooltip("If the object list is null then find the potential objects based off of the tag")]
		public SharedString objectTag;

		[Tooltip("The object variable that will be set when a object is found what the object is")]
		public SharedGameObject returnedObject;

		private float sqrMagnitude;

		public override void OnAwake()
		{
			sqrMagnitude = magnitude.Value * magnitude.Value;
		}

		public override void OnStart()
		{
			if (!string.IsNullOrEmpty(objectTag.Value))
			{
				GameObject[] array = GameObject.FindGameObjectsWithTag(objectTag.Value);
				objects.Value = new List<GameObject>();
				for (int i = 0; i < array.Length; i++)
				{
					objects.Value.Add(array[i]);
				}
			}
		}

		public override TaskStatus OnUpdate()
		{
			if (transform == null || objects.Value == null)
			{
				return TaskStatus.Failure;
			}
			for (int i = 0; i < objects.Value.Count; i++)
			{
				Vector3 vector = objects.Value[i].transform.position - (transform.position + offset.Value);
				if (Vector3.SqrMagnitude(vector) < sqrMagnitude)
				{
					if (!lineOfSight.Value)
					{
						returnedObject.Value = objects.Value[i];
						return TaskStatus.Success;
					}
					if ((bool)MovementUtility.LineOfSight(transform, offset.Value, objects.Value[i], targetOffset.Value, usePhysics2D, ignoreLayerMask.value))
					{
						returnedObject.Value = objects.Value[i];
						return TaskStatus.Success;
					}
				}
			}
			return TaskStatus.Failure;
		}

		public override void OnDrawGizmos()
		{
		}
	}
}