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

public class RobotExplosion : MonoBehaviour
{
    [Header("爆炸特效")]
    public GameObject explosionEffect;  // 爆炸特效预制体
    public float effectDuration = 2f;    // 特效持续时间

    [Header("碎片设置")]
    public GameObject[] debrisPrefabs;   // 碎片预制体数组
    public int debrisAmount = 20;        // 碎片生成数量
    public float minForce = 5f;          // 最小爆炸力
    public float maxForce = 15f;         // 最大爆炸力
    public float torqueIntensity = 50f;  // 旋转强度

    [Header("消失设置")]
    public float debrisLifeTime = 3f;    // 碎片存在时间
    public float fadeDuration = 0.5f;    // 渐隐时间

    private bool isExploded = false;

    private void OnMouseDown()
    {
        if (!isExploded)
        {
            StartExplosion();
            isExploded = true;
        }
    }

    void StartExplosion()
    {
        // 生成爆炸特效
        if (explosionEffect != null)
        {
            GameObject effect = Instantiate(explosionEffect, transform.position, Quaternion.identity);
            Destroy(effect, effectDuration);
        }

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

        // 隐藏机器人
        SetRobotVisible(false);
    }

    void SpawnDebris()
    {
        if (debrisPrefabs.Length == 0) return;

        // 随机选择碎片预制体
        GameObject selectedDebris = debrisPrefabs[Random.Range(0, debrisPrefabs.Length)];

        // 生成参数设置
        Vector3 spawnPos = transform.position + Random.insideUnitSphere * 0.5f;
        Quaternion spawnRot = Random.rotation;

        GameObject debris = Instantiate(selectedDebris, spawnPos, spawnRot);

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

        // 施加随机方向力
        Vector3 randomDir = new Vector3(
            Random.Range(-1f, 1f),
            Random.Range(0.5f, 1f),
            Random.Range(-1f, 1f)
        ).normalized;

        float force = Random.Range(minForce, maxForce);
        rb.AddForce(randomDir * force, ForceMode.Impulse);

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

        // 自动销毁
        StartCoroutine(DestroyDebris(debris));
    }

    System.Collections.IEnumerator DestroyDebris(GameObject debris)
    {
        yield return new WaitForSeconds(debrisLifeTime - fadeDuration);

        // 渐隐效果
        Renderer[] renderers = debris.GetComponentsInChildren<Renderer>();
        float timer = 0f;

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

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

        Destroy(debris);
    }

    void SetRobotVisible(bool visible)
    {
        // 禁用所有渲染器和碰撞体
        foreach (Renderer r in GetComponentsInChildren<Renderer>())
        {
            r.enabled = visible;
        }

        foreach (Collider c in GetComponentsInChildren<Collider>())
        {
            c.enabled = visible;
        }
    }
}