using UnityEngine;

public class BallShooter : MonoBehaviour
{
    public GameObject ballPrefab;
    public Transform shootPoint;

    [Header("Flick Sensitivity")]
    [Tooltip("How much the swipe affects forward speed.")]
    public float forwardSensitivity = 0.05f;

    [Tooltip("How much the swipe affects upward loft.")]
    public float upwardSensitivity = 0.02f;

    [Tooltip("How much side-to-side swipe affects lateral direction.")]
    public float lateralSensitivity = 0.03f;

    [Header("Physics Tuning")]
    [Tooltip("Minimum swipe velocity required to trigger a shot.")]
    public float swipeThreshold = 100f;

    [Tooltip("Maximum velocity allowed (prevents physics glitches).")]
    public float maxVelocity = 1500f;

    [Tooltip("Constant upward force added to every shot for a better arc.")]
    public float baseUpwardBias = 2f;

    public void FlickShoot(Vector2 swipeDelta, float swipeTime)
    {
        // Calculate velocity (pixels per second)
        Vector2 swipeVelocity = swipeDelta / swipeTime;
        float speed = swipeVelocity.magnitude;

        // 1. Deadzone check: Ignore tiny accidental flicks
        if (speed < swipeThreshold) return;

        // 2. Clamp: Prevent extreme speeds
        if (speed > maxVelocity)
        {
            swipeVelocity = swipeVelocity.normalized * maxVelocity;
        }

        GameObject newBall = Instantiate(ballPrefab, shootPoint.position, shootPoint.rotation);
        Rigidbody rb = newBall.GetComponent<Rigidbody>();

        // 3. Translate 2D swipe to 3D force
        // swipeVelocity.y is vertical (up is positive)
        // swipeVelocity.x is horizontal (right is positive)

        float forwardForce = swipeVelocity.y * forwardSensitivity;
        float upwardForce = (swipeVelocity.y * upwardSensitivity) + baseUpwardBias;
        float lateralForce = swipeVelocity.x * lateralSensitivity;

        Vector3 force = (shootPoint.forward * forwardForce) +
                        (Vector3.up * upwardForce) +
                        (shootPoint.right * lateralForce);

        // Apply as Impulse for immediate movement
        rb.AddForce(force, ForceMode.Impulse);

        Destroy(newBall, 5f);
    }
}