using UnityEngine;

public class MotionSampleDisplay : MonoBehaviour
{
    [SerializeField]
    GameObject        left,
                      right;

    public Sprite     sprite;
    public float      timeout;
    private float     start;
    private bool      isInit;
    public MotionNote caller;
    
    private float     acceleration;

    private float     distance = 1.5f;
    private Vector3   localScaleLR = new Vector3(0.5f, 0.5f, 0),
                      initialPos;

    private void Start()
    {
        var obj = GameObject.Find("CoordinateMapView").transform;
        initialPos = obj.position;
        transform.position = initialPos;
        transform.SetParent(obj);
        left .transform.position = initialPos;
        right.transform.position = initialPos;
    }
    
    private void OnEnable()
    {
        acceleration = 2 * distance / Mathf.Pow(timeout, 2);
        isInit = false;

        left .GetComponent<SpriteRenderer>().sprite = sprite;
        right.GetComponent<SpriteRenderer>().sprite = sprite;
        left .transform.localScale = localScaleLR;
        right.transform.localScale = localScaleLR;
        left .transform.position = initialPos + Vector3.left  * distance;
        right.transform.position = initialPos + Vector3.right * distance;
    }

    private void Update()
    {
        var current = Time.time * 1000;
        if (!isInit)
        {
            isInit = true;
            start = current;
        }

        var delta = current - start;
        if (delta > timeout)
        {
            Destroy(gameObject);
            return;
        }

        var location = distance - acceleration / 2 * Mathf.Pow(delta, 2);
        left .transform.position = initialPos + Vector3.left  * location;
        right.transform.position = initialPos + Vector3.right * location;
    }
}