using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class ExplosionEffect : MonoBehaviour
{
    [Header("爆炸碎片设置")]
    public GameObject[] debrisPrefabs;  // 可替换的碎片预制体
    public int debrisCount = 15;        // 生成碎片数量
    public float minForce = 5f;         // 最小爆炸力
    public float maxForce = 15f;        // 最大爆炸力

    [Header("随机化设置")]
    public float rotationIntensity = 50f;  // 旋转强度
    public Vector3 forceVariation = new Vector3(0.5f, 1f, 0.5f); // 方向随机化系数

    [Header("特效设置")]
    public float lifeTime = 3f;         // 碎片存在时间
    public float fadeOutTime = 0.5f;    // 渐隐时间

    private void OnMouseDown()
    {
        // 禁用原始物体
        GetComponent<Renderer>().enabled = false;
        GetComponent<Collider>().enabled = false;

        // 生成随机碎片
        for (int i = 0; i < debrisCount; i++)
        {
            CreateDebris();
        }

        // 销毁原始物体（带延迟）
        Destroy(gameObject, lifeTime);
    }

    void CreateDebris()
    {
        // 随机选择预制体
        GameObject debris = Instantiate(
            debrisPrefabs[Random.Range(0, debrisPrefabs.Length)],
            transform.position + Random.insideUnitSphere * 0.5f,
            Random.rotation
        );

        // 添加物理组件
        Rigidbody rb = debris.GetComponent<Rigidbody>();
        if (rb == null) rb = debris.AddComponent<Rigidbody>();

        // 计算随机爆炸方向
        Vector3 randomDirection = new Vector3(
            Random.Range(-forceVariation.x, forceVariation.x),
            Random.Range(0, forceVariation.y),
            Random.Range(-forceVariation.z, forceVariation.z)
        ).normalized;

        // 施加爆炸力
        float randomForce = Random.Range(minForce, maxForce);
        rb.AddForce(randomDirection * randomForce, ForceMode.Impulse);

        // 添加随机旋转
        rb.AddTorque(
            Random.insideUnitSphere * rotationIntensity,
            ForceMode.Impulse
        );

        // 配置自动销毁
        StartCoroutine(FadeOutDebris(debris));
    }

    System.Collections.IEnumerator FadeOutDebris(GameObject debris)
    {
        // 获取所有子物体渲染器
        Renderer[] renderers = debris.GetComponentsInChildren<Renderer>();
        float timer = 0;

        while (timer < fadeOutTime)
        {
            timer += Time.deltaTime;
            float alpha = Mathf.Lerp(1, 0, timer / fadeOutTime);

            foreach (Renderer r in renderers)
            {
                if (r.material.HasProperty("_Color"))
                {
                    Color c = r.material.color;
                    c.a = alpha;
                    r.material.color = c;
                }
            }
            yield return null;
        }

        Destroy(debris);
    }
}