I want to shooting with mobile joystick but my code is for mouse fire 1

i want to shoot with mobile joystick in the right screen, when joystick is vertical up, shot is going to up or joystick is right horizontal, shot is going to right. my code is for mouse fire 1 how can i write for mobile shot joystick

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

public class Weapon : MonoBehaviour {

 public float fireRate = 0;
 public int Damage = 10;
 public LayerMask whatToHit;

 public Transform BulletTrailPrefab;
 public Transform HitPrefab;
 public Transform MuzzleFlashPrefab;
 float timeToSpawnEffect = 0;
 public float effectSpawnRate = 10;

 public float camShakeAmt = 0.01f;
 public float camShakeLength = 0.02f;
 //CameraShake camShake;

 float timeToFire = 0;
 Transform firePoint;


 // Start is called before the first frame update
 void Awake()
 {
     firePoint = transform.Find("FirePoint");
     if (firePoint == null)
     {
         Debug.LogError("No firepoint!! WHAT !!");

     }
 }

 //  private void Start()
 //  {
 //camShake = GameMaster.gm.GetComponent<CameraShake>();
 // if (camShake == null)
 // {
 // Debug.LogError("no camera shakes");
 // }
 //}
 // Update is called once per frame
 void Update()
 {
         if (fireRate == 0)
         {
             if (Input.GetButtonDown("Fire1"))
             {
                 Shoot();
             }
         }

      else
     {
         if (Input.GetButton ("Fire1") && Time.time > timeToFire)
             {
                 timeToFire = Time.time + 1 / fireRate;
                 Shoot();
             }
      }
 }
 
 void Shoot()
 {
     Vector2 mousePosition = new Vector2(Camera.main.ScreenToWorldPoint(Input.mousePosition).x, Camera.main.ScreenToWorldPoint(Input.mousePosition).y);
     Vector2 firePointPosition = new Vector2(firePoint.position.x, firePoint.position.y);
     RaycastHit2D hit = Physics2D.Raycast(firePointPosition, mousePosition - firePointPosition, 100, whatToHit);
     
     Debug.DrawLine(firePointPosition, (mousePosition - firePointPosition) * 100, Color.cyan);
     if (hit.collider != null)
     {
         Debug.DrawLine(firePointPosition, hit.point, Color.red);
         Enemy enemy = hit.collider.GetComponent<Enemy>();
         if (enemy!=null)
         {
             enemy.DamageEnemy(Damage);
             //Debug.Log("We hit" + hit.collider.name + "and did" + Damage + "damage.");
         }
     }

     if (Time.time >= timeToSpawnEffect)
     {

         Vector3 hitPos;
         Vector3 hitNormal;
         if (hit.collider == null)
         {
             hitPos = (mousePosition - firePointPosition) * 30;
             hitNormal = new Vector3(9999, 9999, 9999);
         }
            
         else
         {
             hitPos = hit.point;
             hitNormal = hit.normal;
         }
 

         Effect(hitPos, hitNormal);
         timeToSpawnEffect = Time.time + 1 / effectSpawnRate;
     }
 }

 void Effect (Vector3 hitPos, Vector3 hitNormal)
 {
     Transform trail = Instantiate(BulletTrailPrefab, firePoint.position, firePoint.rotation) as Transform;
     LineRenderer lr = trail.GetComponent<LineRenderer>();

     if(lr != null)
     {
         lr.SetPosition(0, firePoint.position);
         lr.SetPosition(1, hitPos);
     }

     Destroy(trail.gameObject, 0.04f);

     if (hitNormal != new Vector3(9999, 9999, 9999))
     {
         Transform hitParticle = Instantiate(HitPrefab, hitPos, Quaternion.FromToRotation(Vector3.right, hitNormal)) as Transform;
         Destroy(hitParticle.gameObject, 1f);
     }

     Transform clone = Instantiate(MuzzleFlashPrefab, firePoint.position, firePoint.rotation) as Transform;
     clone.parent = firePoint;
     float size = Random.Range(0.6f, 0.9f);
     clone.localScale = new Vector3(size, size, size);
     Destroy(clone.gameObject, 0.02f);

     //camShake.Shake(camShakeAmt, camShakeLength);
 }

}