using System;
using System.Collections.Generic;
using BlockSpace.Voxels;
using Photon.VR.Player;
using UnityEngine;

[DisallowMultipleComponent]
public sealed class TriggerBehavior : NodeBehavior
{
	private const float PlayerTouchRadius = 0.12f;

	private const float StandingRayLift = 0.15f;

	private const float StandingRayDistance = 1.5f;

	private const float PlayerCacheRefreshInterval = 0.25f;

	private static readonly Collider[] TouchOverlapBuffer = new Collider[16];

	private readonly HashSet<int> touchingPlayerIds = new HashSet<int>();

	private readonly HashSet<int> currentFramePlayerIds = new HashSet<int>();

	private readonly List<PhotonVRPlayer> cachedPlayers = new List<PhotonVRPlayer>();

	private VoxelGroup targetGroup;

	private TriggerTargetCollisionRelay collisionRelay;

	private float nextPlayerCacheRefreshAt;

	private void Start()
	{
		if (base.IsAuthoritative)
		{
			RefreshTargetGroup(force: true);
		}
	}

	private void OnDisable()
	{
		UnbindCollisionRelay();
		touchingPlayerIds.Clear();
		currentFramePlayerIds.Clear();
		cachedPlayers.Clear();
	}

	private void Update()
	{
		if (base.IsAuthoritative)
		{
			RefreshTargetGroup(force: false);
			PollPlayerTouches();
		}
	}

	public override void OnInputValueChanged(string inputPortName, BSValue value)
	{
		if (base.IsAuthoritative && string.Equals(inputPortName, "Object", StringComparison.Ordinal))
		{
			RefreshTargetGroup(force: true);
		}
	}

	private void RefreshTargetGroup(bool force)
	{
		VoxelGroup inputGroup = GetInputGroup("Object");
		if (!force && targetGroup == inputGroup)
		{
			return;
		}
		if (collisionRelay != null)
		{
			collisionRelay.ColliderEntered -= HandleColliderEntered;
		}
		targetGroup = inputGroup;
		touchingPlayerIds.Clear();
		currentFramePlayerIds.Clear();
		collisionRelay = null;
		if (targetGroup == null)
		{
			SetOutputValueIfChanged("Player", BSValue.None);
			SetOutputValueIfChanged("Object", BSValue.None);
			return;
		}
		collisionRelay = targetGroup.GetComponent<TriggerTargetCollisionRelay>();
		if (collisionRelay == null)
		{
			collisionRelay = targetGroup.gameObject.AddComponent<TriggerTargetCollisionRelay>();
		}
		collisionRelay.ColliderEntered += HandleColliderEntered;
	}

	private void UnbindCollisionRelay()
	{
		if (collisionRelay != null)
		{
			collisionRelay.ColliderEntered -= HandleColliderEntered;
			collisionRelay = null;
		}
	}

	private void PollPlayerTouches()
	{
		if (targetGroup == null)
		{
			touchingPlayerIds.Clear();
			return;
		}
		if (Time.unscaledTime >= nextPlayerCacheRefreshAt)
		{
			RefreshPlayerCache();
			nextPlayerCacheRefreshAt = Time.unscaledTime + 0.25f;
		}
		currentFramePlayerIds.Clear();
		for (int i = 0; i < cachedPlayers.Count; i++)
		{
			PhotonVRPlayer photonVRPlayer = cachedPlayers[i];
			if (photonVRPlayer == null || !photonVRPlayer.gameObject.activeInHierarchy)
			{
				continue;
			}
			int playerId = GetPlayerId(photonVRPlayer);
			if (playerId != 0 && IsPlayerTouchingTarget(photonVRPlayer, targetGroup))
			{
				currentFramePlayerIds.Add(playerId);
				if (!touchingPlayerIds.Contains(playerId))
				{
					touchingPlayerIds.Add(playerId);
					SetOutputValueIfChanged("Player", BSValue.FromPlayer(playerId));
					TriggerOutput("Touched");
				}
			}
		}
		touchingPlayerIds.RemoveWhere((int item) => !currentFramePlayerIds.Contains(item));
	}

	private void HandleColliderEntered(Collider other)
	{
		if (!base.IsAuthoritative || targetGroup == null || other == null || TryResolvePlayer(other, out var _))
		{
			return;
		}
		VoxelGroup componentInParent = other.GetComponentInParent<VoxelGroup>();
		if (!(componentInParent == targetGroup))
		{
			if (componentInParent != null)
			{
				SetOutputValueIfChanged("Object", BSValue.FromGroup(componentInParent.id));
			}
			else
			{
				SetOutputValueIfChanged("Object", BSValue.None);
			}
			TriggerOutput("Object Touched");
		}
	}

	private void RefreshPlayerCache()
	{
		cachedPlayers.Clear();
		PhotonVRPlayer[] array = UnityEngine.Object.FindObjectsByType<PhotonVRPlayer>(FindObjectsInactive.Include, FindObjectsSortMode.None);
		for (int i = 0; i < array.Length; i++)
		{
			if (array[i] != null)
			{
				cachedPlayers.Add(array[i]);
			}
		}
	}

	private static bool IsPlayerTouchingTarget(PhotonVRPlayer player, VoxelGroup group)
	{
		if (player == null || group == null)
		{
			return false;
		}
		Collider collider = ((group.meshCollider != null && group.meshCollider.enabled) ? group.meshCollider : group.GetComponent<Collider>());
		if (collider == null || !collider.enabled)
		{
			return false;
		}
		if (IsPointTouchingCollider(collider, player.Head, 0.12f) || IsPointTouchingCollider(collider, player.LeftHand, 0.12f) || IsPointTouchingCollider(collider, player.RightHand, 0.12f))
		{
			return true;
		}
		return IsStandingOnCollider(collider, player);
	}

	private static bool IsPointTouchingCollider(Collider targetCollider, Transform pointTransform, float radius)
	{
		if (targetCollider == null || pointTransform == null)
		{
			return false;
		}
		Vector3 position = pointTransform.position;
		float num = radius * radius;
		if (targetCollider.bounds.SqrDistance(position) > num)
		{
			return false;
		}
		int num2 = Physics.OverlapSphereNonAlloc(position, radius, TouchOverlapBuffer, -1, QueryTriggerInteraction.Collide);
		for (int i = 0; i < num2; i++)
		{
			if (TouchOverlapBuffer[i] == targetCollider)
			{
				return true;
			}
		}
		return false;
	}

	private static bool IsStandingOnCollider(Collider targetCollider, PhotonVRPlayer player)
	{
		if (targetCollider == null || player == null)
		{
			return false;
		}
		Transform transform = ((player.Body != null) ? player.Body : player.Head);
		if (transform == null)
		{
			return false;
		}
		if (!Physics.Raycast(new Ray(transform.position + Vector3.up * 0.15f, Vector3.down), out var hitInfo, 1.5f, -5, QueryTriggerInteraction.Ignore))
		{
			return false;
		}
		if (hitInfo.collider == targetCollider && hitInfo.distance > 0.05f)
		{
			return hitInfo.normal.y >= 0.35f;
		}
		return false;
	}

	private static bool TryResolvePlayer(Collider collider, out PhotonVRPlayer player)
	{
		player = ((collider != null) ? collider.GetComponentInParent<PhotonVRPlayer>() : null);
		return player != null;
	}

	private static int GetPlayerId(PhotonVRPlayer player)
	{
		if (!(player != null) || !(player.photonView != null) || player.photonView.Owner == null)
		{
			return 0;
		}
		return player.photonView.Owner.ActorNumber;
	}
}