using UnityEngine;

/// <summary>
/// 石头人砸地冲击波 · 触发脚本
/// 挂在平躺的 Quad 上，砸地命中帧调用 Play()
/// </summary>
[RequireComponent(typeof(Renderer))]
public class ShockwaveRing : MonoBehaviour
{
    [Header("扩散持续时间（秒）")]
    public float duration = 0.6f;

    [Header("起始缩放（可选，Play 时自动应用）")]
    public Vector3 startScale = new Vector3(8f, 8f, 1f);

    private Material mat;
    private float timer = -1f;

    private void Awake()
    {
        Initialize();
    }

    void Start()
    {
        Initialize();
    }

    private void Initialize()
    {
        if (mat != null)
        {
            return;
        }

        // 用 .material 生成独立实例，不影响材质资产
        mat = GetComponent<Renderer>().material;
        mat.SetFloat("_Progress", 0f);
        transform.localScale = startScale;
    }

    /// <summary>
    /// 外部调用：石头人拳头砸到地面的那一帧触发
    /// </summary>
    public void Play()
    {
        Initialize();
        gameObject.SetActive(true);
        timer = 0f;
        mat.SetFloat("_Progress", 0f);
    }

    void Update()
    {
        if (timer < 0f) return;

        timer += Time.deltaTime;
        float progress = Mathf.Clamp01(timer / duration);
        mat.SetFloat("_Progress", progress);

        // 扩散结束自动隐藏
        if (progress >= 1f)
        {
            gameObject.SetActive(false);
            timer = -1f;
        }
    }
}
//（注：内容由AI生成）