DuelSystem

using UnityEngine;

public class DuelSystem : MonoBehaviour
{
    [Header("Duel")]
    public Transform enemyTarget; // chest or head
    public float duelTime = 3f;

    [Header("Reticle")]
    public RectTransform reticle;
    public float reticleSpeed = 800f;
    public float shrinkSpeed = 2f;
    public float maxSize = 300f;
    public float minSize = 60f;
    public Camera cam;
    [SerializeField] float _hover_time;

    float timer;
    bool duelActive = false;
    float currentSize;
    Vector2 velocity;

    void Start()
    {
        currentSize = maxSize;
        Cursor.lockState = CursorLockMode.Locked;
    }

    bool IsHoveringEnemy()
    {
        if (enemyTarget == null || Camera.main == null) return false;

        Vector2 enemyScreenPos = Camera.main.WorldToScreenPoint(enemyTarget.position);
        float distance = Vector2.Distance(reticle.position, enemyScreenPos);

        return distance < currentSize * 0.5f; // insid  e circle
    }

    public void StartDuel()
    {
        duelActive = true;
        timer = duelTime;
        currentSize = maxSize;

        Time.timeScale = 0.5f; // slight slow-mo
    }

    void Update()
    {
        if (!duelActive) return;

        HandleMovement();
        HandleShrink();

        timer -= Time.unscaledDeltaTime;

        if (timer <= 0f || Input.GetMouseButtonDown(0))
        {
            ResolveShot();
        }
    }

    

    void HandleMovement()
    {
        Vector2 input = new Vector2(
            Input.GetAxis("Mouse X"),
            Input.GetAxis("Mouse Y")
        );

        // accelerate toward input
        velocity += input * reticleSpeed * Time.unscaledDeltaTime;

        // apply friction (THIS creates the feel)
        velocity = Vector2.Lerp(velocity, Vector2.zero, Time.unscaledDeltaTime * 2f);

        // move reticle
        reticle.anchoredPosition += velocity * Time.unscaledDeltaTime;
    }

    

    void HandleShrink()
    {
        if (IsHoveringEnemy())
            _hover_time += Time.unscaledDeltaTime;
        else
            _hover_time = 0f;

        bool locked = _hover_time > 0.2f; // must stay on target briefly

        float targetSize = locked ? minSize : maxSize;

        currentSize = Mathf.Lerp(currentSize, targetSize, Time.unscaledDeltaTime * shrinkSpeed);
        reticle.sizeDelta = new Vector2(currentSize, currentSize);
    }

    void ResolveShot()
    {
        duelActive = false;
        Time.timeScale = 1f;

        // convert enemy world position  screen
        Vector3 screenPos = cam.WorldToScreenPoint(enemyTarget.position);

        float distance = Vector2.Distance(reticle.position, screenPos);

        Debug.Log("Accuracy distance: " + distance);

        if (distance < 40f)
        {
            Debug.Log("HEADSHOT");
        }
        else if (distance < 120f)
        {
            Debug.Log("BODY SHOT");
        }
        else
        {
            Debug.Log("MISS... you dead");
        }
    }
}