PipeController

using System.Collections;
using System.Collections.Generic;
using UnityEditor;
using UnityEngine;

public class PipeController : MonoBehaviour
{
    public GameObject[] waypoints, pipeModels;

    private void Update()
    {
        for (int i = 0; i < waypoints.Length; i++)
        {
            waypoints[i].SetActive(pipeModels[i].activeInHierarchy);
        }
    }

    private void OnTriggerStay(Collider other)
    {
        if (other.gameObject.tag == "Item")
        {
            ItemController itemController = other.gameObject.GetComponent<ItemController>();
            if (itemController.currentPipe == transform.parent.gameObject)
            {
                if (itemController.beforeCenter)
                {
                    float step = itemController.currentSpeed * Time.deltaTime;
                    other.transform.position =
                        Vector3.MoveTowards(other.transform.position,
                            new Vector3(transform.position.x , transform.position.y - 5 , transform.position.z), step);
                }
                else
                {
                    float step = itemController.currentSpeed * Time.deltaTime;
                    other.transform.position =
                        Vector3.MoveTowards(other.transform.position,
                            new Vector3(itemController.exitWaypoint.transform.position.x , itemController.exitWaypoint.transform.position.y - 5 , itemController.exitWaypoint.transform.position.z), step);
                }

                if (other.transform.position ==
                    new Vector3(transform.position.x, transform.position.y - 5, transform.position.z))
                {
                    PickRandomWaypoint(other.gameObject);
                }
            }
        }
    }

    void PickRandomWaypoint(GameObject other)
    {

        ItemController itemController = other.GetComponent<ItemController>();
        int amountInactive = 0;
        for (int i = 0; i < waypoints.Length; i++)
        {
            if (!waypoints[i].activeInHierarchy && waypoints[i] != itemController.entranceWaypoint)
            {
                amountInactive++;
            }
        }


        if (amountInactive == 5)
        {
            Destroy(other);
        }

        int randomWaypoint = Random.Range(0, 6);
        if (waypoints[randomWaypoint].active == false)
        {
            PickRandomWaypoint(other);
            return;
        }

        if (waypoints[randomWaypoint] == other.GetComponent<ItemController>().entranceWaypoint)
        {
            PickRandomWaypoint(other);
            return;
        }

        other.GetComponent<ItemController>().exitWaypoint = waypoints[randomWaypoint];
        other.GetComponent<ItemController>().beforeCenter = false;

    }

    public void UpdatePipes(int direction)
    {
        pipeModels[direction - 1].SetActive(true);
    }
}