KeyDetector.cs

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

public class KeyDetector : MonoBehaviour
{
    private TextMeshProUGUI display;
    public int correctCombination;
    public bool accessGranted = false;
    public GameObject keyCard;
    public GameObject iKeycard;
    public Transform spawnPoint;
    private AudioSource audioSource;
    public AudioClip loseSound;
    public AudioClip winSound;

    void Start()
    {
        display = GameObject.FindGameObjectWithTag("Display").GetComponentInChildren<TextMeshProUGUI>();
        display.text = "Enter the right number combo to get keycard";
        audioSource = gameObject.AddComponent<AudioSource>();
        audioSource.spatialBlend =1;
        audioSource.volume = 0.2f;
    }
    private void OnTriggerEnter(Collider other)
    {
        if(other.CompareTag("KeypadButton"))
        {
            //Debug.Log("Your touching it");
            var key = other.GetComponentInChildren<TextMeshProUGUI>();
            if(key != null)
            {
                Debug.Log("Your key is NOT null bruh you made it a level deeper");
                var KeyFeedback = other.gameObject.GetComponent<KeyFeedback>();
                if(key.text == "<")
                {
                    Debug.Log("Your key is back arrow");
                    if(display.text.Length > 0)
                    {
                        display.text = display.text.Substring(0, display.text.Length - 1);
                    }
                }
                else if(key.text == "go")
                {
                    bool accessGranted = false;
                    bool onlyNumbers = int.TryParse(display.text, out int value); // not sure if I need this here or not
                    if(onlyNumbers == true && display.text.Length > 0) //might need to add this back to the if statement: onlyNumbers == true &&
                    {
                       accessGranted = CheckIfCorrect(Convert.ToInt32(display.text));
                    }
                    if(accessGranted == true)
                    {
                        GameObject iKeycard = Instantiate(keyCard, spawnPoint.transform.position, spawnPoint.transform.rotation);
                        display.text = "You did it! Congratulations. Now pick up the keycard and use it to open the door";
                        audioSource.PlayOneShot(winSound);

                        accessGranted = false;

                    }
                    else
                    {
                        display.text = "nah bruh you got it wrong, hit the X button clear it and try again";
                        audioSource.PlayOneShot(loseSound);
                    }
                }
                else if(key.text == "X")
                {
                    display.text = "";
                }
                else
                {
                     //test if there is letters on the display, if so empty display before adding new number
                        bool onlyNumbers = int.TryParse(display.text, out int value);
                        if(onlyNumbers == false)
                        {
                            display.text = "";
                        }

                        //make sure that there is max 4 numbers on the display
                        if(display.text.Length < 4)
                        {
                            display.text += key.text;
                        }
                }
                KeyFeedback.keyHit = true;
            }
        }
    }
    public bool CheckIfCorrect(int combination)
    {
        if(combination == correctCombination)
        {
            accessGranted = true;
            return true;
        }
        return false;
    }
}