using UnityEngine;
using UnityEngine.AI;

public class npcSleeper : npcBase
{
	private NavMeshAgent myNav;
	private enum mode { sleeping, hunting, frozen };
	private mode myMode;
	private float patience = 3; // Aggro grace in seconds.
	private float patienceCounter;
	private Transform player;
	private float killRange = 0.3f;
	private float litThreshold = 0.1f;
	private RaycastHit hitInfo;

	public override void Start()
	{
		base.Start();
		myNav = GetComponent<NavMeshAgent>();
		myMode = mode.sleeping;
		player = VRTK.VRTK_DeviceFinder.HeadsetTransform();
	}

	public override void Update()
	{
		base.Start();

		switch (myMode)
		{
			case mode.sleeping:
				doSleeping();
				break;
			case mode.hunting:
				doHunting();
				break;
			case mode.frozen:
				doFrozen();
				break;
		}
	}
	private void doSleeping()
	{
		if (lit > litThreshold)
		{
			patienceCounter += Time.deltaTime;
		}
		if (patienceCounter > patience)
		{
			myMode = mode.hunting;
		}
	}

	private void doHunting()
	{
		if ((transform.position - player.position).magnitude > killRange)
		{
			if (Physics.Raycast(transform.position, (player.position - transform.position), out hitInfo, killRange, ~LayerMask.GetMask("powerBeam", "lightBeam")))
			{
				if (hitInfo.transform == player)
				{
					Debug.Log("This kills the player");
				}
			}
		}
		if ((myNav.isOnNavMesh) && ((myNav.destination - player.position).magnitude > killRange))
		{
			myNav.SetDestination(player.position);
		}
		if (lit > litThreshold)
		{
			myMode = mode.frozen;
		}
	}
	private void doFrozen()
	{
		if (lit < litThreshold)
		{
			myMode = mode.hunting;
		}
	}
}