using UnityEngine;

/// <summary>
/// Represents a single bubble, handling its movement, wobble effect, scaling, and sprite assignment.
/// </summary>
public class Bubble : MonoBehaviour
{
    public float speed = 1f;
    public float wobbleSpeed = 1f;
    private SpriteRenderer spriteRenderer;
    private SpriteRenderer bottleSpriteRenderer;
    private float timeOffset;
    private float minScale = 0.2f;
    private float maxScale = 1.2f;

    void Awake()
    {
        // Cache references and randomize time offset for wobble
        spriteRenderer = GetComponent<SpriteRenderer>();
        timeOffset = Random.value * 100f;
        // Find the child named "BottleSprite" and get its SpriteRenderer
        Transform bottleSpriteTransform = transform.Find("BubbleSprite");
        if (bottleSpriteTransform != null)
        {
            bottleSpriteRenderer = bottleSpriteTransform.GetComponent<SpriteRenderer>();
        }
    }

    void Update()
    {
        // Move bubble upward
        transform.position += Vector3.up * speed * Time.deltaTime;
        // Wobble effect (smooth oscillation between min and max scale)
        float t = (Mathf.Sin((Time.time + timeOffset) * wobbleSpeed) + 1f) * 0.5f; // t in [0,1]
        float newScale = Mathf.Lerp(minScale, maxScale, t);
        transform.localScale = Vector3.one * newScale;
        // Destroy when off screen
        if (transform.position.y > Camera.main.orthographicSize + 2f)
        {
            Destroy(gameObject);
        }
    }

    /// <summary>
    /// Sets the main sprite for the bubble.
    /// </summary>
    /// <param name="sprite">Sprite to assign.</param>
    public void SetSprite(Sprite sprite)
    {
        if (spriteRenderer != null)
            spriteRenderer.sprite = sprite;
    }

    /// <summary>
    /// Sets the sprite for the child "BottleSprite" renderer.
    /// </summary>
    /// <param name="sprite">Sprite to assign.</param>
    public void SetBottleSprite(Sprite sprite)
    {
        if (bottleSpriteRenderer != null)
            bottleSpriteRenderer.sprite = sprite;
    }

    /// <summary>
    /// Sets the minimum and maximum scale for the wobble effect.
    /// </summary>
    /// <param name="min">Minimum scale.</param>
    /// <param name="max">Maximum scale.</param>
    public void SetWobbleScaleLimits(float min, float max)
    {
        minScale = min;
        maxScale = max;
    }
}