basic bitch click thingy for prefabs

OnClickManageBuildings.cs

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

public class OnClickManageBuilding : MonoBehaviour {

    public GameObject buildingPrefab;

    public Material selectedMaterial;

    public Material defaultMaterial;

    public Material destroyMaterial;

    public Material createMaterial;

    public Material busyMaterial;

    private GameObject clone;

    private bool isBusy = false;

    private bool isCreated = false;

    private ZoomToTarget refZoomer;


    public void SetActive() {
        this.isBusy = false;
    }

    public void SetComplete()
    {
        this.isBusy = false;
        isCreated = true;
        gameObject.GetComponent<MeshRenderer>().sharedMaterial = defaultMaterial;
    }


    public void Reset()
    {
        GameObject.Destroy(clone);
        isBusy = false;
        isCreated = false;
        gameObject.GetComponent<MeshRenderer>().sharedMaterial = defaultMaterial;
    }


    // Use this for initialization
    void Start () {

        if (buildingPrefab == null)
            Debug.Assert(buildingPrefab == null);
        gameObject.GetComponent<MeshRenderer>().sharedMaterial = defaultMaterial;

    }

    private bool checkIscomplete() {

        if (clone != null)
        {
            if (refZoomer == null)
            {
                refZoomer = clone.GetComponent<ZoomToTarget>();
            }

            return refZoomer.complete;
        }

        return false;

    }


    private void OnMouseOver()
    {


        isCreated = checkIscomplete();

        if (isCreated)
        {
            isBusy = false;
        }

        if (isBusy)
            return;

        if (isCreated)
        gameObject.GetComponent<MeshRenderer>().sharedMaterial = destroyMaterial;

        else
        gameObject.GetComponent<MeshRenderer>().sharedMaterial = createMaterial;

    }

    private void OnMouseExit()
    {
        if (isBusy)
            return;

       
            gameObject.GetComponent<MeshRenderer>().sharedMaterial = defaultMaterial;
        

    }


    private void OnMouseUp()
    {

            if (isBusy)
            return;

        if (isCreated)
        {
            Reset();
            return;
        }

        clone =   Instantiate(buildingPrefab);
        isBusy = true;
        gameObject.GetComponent<MeshRenderer>().sharedMaterial = busyMaterial;



    }

    
}