using System.Collections;
using UnityEngine;
using UnityEngine.XR.Interaction.Toolkit;
using UnityEngine.XR.Interaction.Toolkit.Interactables;

/// <summary>
/// S1 天命玄鸟 - 悬浮甲骨交互
///
/// 同一 GameObject 需要同时挂 XRGrabInteractable。
///
/// 交互逻辑：
///   hover（触摸/靠近，未抓取）→ 播放文字显示动画
///   selectEntered（抓取）       → 隐藏文字，取消归位计时
///   selectExited（松手）        → 延迟后溶解消失 → 瞬间归位 → 溶解出现
/// </summary>
[RequireComponent(typeof(XRGrabInteractable))]
public class S1_OracleBoneInteract : MonoBehaviour
{
    [Header("文字动画")]
    [SerializeField] private Animator textAnimator;
    [SerializeField] private string showAnimName = "Open";       // 文字出现
    [SerializeField] private string hideAnimName = "Translate";  // 文字消失
    [SerializeField] private AudioSource touchAudio;

    [Header("归位溶解效果")]
    [SerializeField] private EffectHideAndShowCtr effectCtr;
    [SerializeField] private float resetDelayTime  = 2f;   // 松手后多久开始归位
    [SerializeField] private float dissolveDuration = 1f;  // 溶解动画时长

    // ── 内部状态 ─────────────────────────────────────────────
    private XRGrabInteractable m_grab;
    private Rigidbody m_rb;
    private Vector3    m_returnPos;
    private Quaternion m_returnRot;
    private Coroutine  m_resetCoroutine;

    // ── 生命周期 ──────────────────────────────────────────────

    private void Awake()
    {
        m_grab = GetComponent<XRGrabInteractable>();
        m_rb   = GetComponent<Rigidbody>();
    }

    private void Start()
    {
        // 记录初始世界位置/旋转作为归位目标
        m_returnPos = transform.position;
        m_returnRot = transform.rotation;
    }

    private void OnEnable()
    {
        m_grab.hoverEntered.AddListener(OnHoverEntered);
        m_grab.selectEntered.AddListener(OnSelectEntered);
        m_grab.selectExited.AddListener(OnSelectExited);
    }

    private void OnDisable()
    {
        m_grab.hoverEntered.RemoveListener(OnHoverEntered);
        m_grab.selectEntered.RemoveListener(OnSelectEntered);
        m_grab.selectExited.RemoveListener(OnSelectExited);
        StopReset();
    }

    // ── XRI 事件 ──────────────────────────────────────────────

    /// <summary>手靠近/触摸（未抓取）→ 显示文字</summary>
    private void OnHoverEntered(HoverEnterEventArgs args)
    {
        if (m_grab.isSelected) return; // 已被抓取中，不重复触发
        ShowText();
    }

    /// <summary>抓取 → 隐藏文字，取消归位计时</summary>
    private void OnSelectEntered(SelectEnterEventArgs args)
    {
        StopReset();
        HideText();
    }

    /// <summary>松手 → 延迟后溶解归位</summary>
    private void OnSelectExited(SelectExitEventArgs args)
    {
        m_resetCoroutine = StartCoroutine(DelayThenReturn());
    }

    // ── 归位协程 ──────────────────────────────────────────────

    private IEnumerator DelayThenReturn()
    {
        yield return new WaitForSeconds(resetDelayTime);

        // 归位期间禁止被重新抓取
        m_grab.enabled = false;

        // 1. 停止物理运动（避免归位时还在飞）
        if (m_rb != null)
        {
            m_rb.velocity        = Vector3.zero;
            m_rb.angularVelocity = Vector3.zero;
            m_rb.isKinematic     = true;
        }

        // 2. 溶解消失
        if (effectCtr != null)
            effectCtr.Hide();

        yield return new WaitForSeconds(dissolveDuration);

        // 3. 瞬间归位
        transform.position = m_returnPos;
        transform.rotation = m_returnRot;

        // 4. 溶解出现
        if (effectCtr != null)
            effectCtr.Show();

        yield return new WaitForSeconds(dissolveDuration);

        // 5. 恢复交互
        m_grab.enabled = true;
        m_resetCoroutine = null;
    }

    private void StopReset()
    {
        if (m_resetCoroutine != null)
        {
            StopCoroutine(m_resetCoroutine);
            m_resetCoroutine = null;
        }
        // 确保归位中断时交互器恢复可用
        if (m_grab != null)
            m_grab.enabled = true;
    }

    // ── 文字动画 ──────────────────────────────────────────────

    private void ShowText()
    {
        if (textAnimator != null)
            textAnimator.Play(showAnimName);
        if (touchAudio != null)
            touchAudio.Play();
    }

    private void HideText()
    {
        if (textAnimator != null)
            textAnimator.Play(hideAnimName);
    }
}