using Sirenix.OdinInspector;
using UnityEngine;

public class JianTouManager : MonoBehaviour
{  
    public static JianTouManager instance;

    [ReadOnly]
    [LabelText("是否激活")]
    public bool active = true;

    [LabelText("是否开启近小远大")]
    public bool isScale = false;

    public static JianTouManager Instance 
    {
        get 
        {
			if (instance == null) 
			{
                instance = FindObjectOfType<JianTouManager>();

				if (instance == null)
				{
                    GameObject prefab = Resources.Load<GameObject>("箭头");

                    GameObject jianTou = Instantiate(prefab,null);

                    instance = jianTou.GetComponent<JianTouManager>();
                }   
			}

            return instance;
        }
    }

    private float _minDistance = 0.5f;
    private float _maxDistance = 10f;
    private float _minScale = 0.5f;
    private float _maxScale = 2;

    private Animation _animation;
    private GameObject _jiantou;
    private float _distance;
    private Vector3 _scale;
    private Bounds _bound;

    private Transform currentHitTra;

    private void Awake()
    {
		if (instance == null)
		{
            instance = this;
		}
        _animation = this.transform.GetChild(0).GetComponent<Animation>();
        _jiantou = this.gameObject;
    }

    void Update()
    {
        if (isScale)
        {
            if (_jiantou.activeSelf)
            {
                _distance = Vector3.Distance(_jiantou.transform.position, Camera.main.transform.position);
                if (_distance < _minDistance)
                {
                    _scale = Vector3.one * _minScale;
                }
                else
                {
                    _scale = Vector3.one * Mathf.Lerp(_minScale, _maxScale, _distance / _maxDistance);
                }
                _jiantou.transform.localScale = Vector3.Lerp(_jiantou.transform.localScale, _scale, Time.deltaTime * 10f);
            }
        }
    }

    /// <summary>
    /// 箭头设置
    /// </summary>
    /// <param name="hightLightScr"></param>
    /// <param name="t"></param>
    public void ShowJianTou(Transform t)
    {
        currentHitTra = t;
        _bound = GetBounds(t);
        _animation.enabled = true;
        _jiantou.SetActive(true);
        _minScale = Mathf.Clamp(((_bound.size.x + _bound.size.y + _bound.size.z) / 3), 0.05f, 0.5f);

        if (isScale)
            _jiantou.transform.localScale = Vector3.one * _minScale;

        _jiantou.transform.position = t.position + Vector3.up * ((_bound.size.y * 0.6f) < 0.06f ? 0.06f : (_bound.size.y * 0.6f));
        _animation.Play("Jump2");
        
    }
    public void ShowJianTou(Vector3 point, float hight)
    {
        _animation.enabled = true;
        this.gameObject.SetActive(true);
        //HighlightingManager.Instance.OnLighting(_jiantou.gameObject);
        this.transform.position = point + Vector3.up * hight;
        _animation.Play("Take 001");
    }

    public void HideJianTou()
    {
        _animation.enabled = false;
        this.gameObject.SetActive(false);
    }

    public void HideJianTou(Transform tra)
    {
        Debug.LogError(currentHitTra == tra);
		if (currentHitTra == tra)
		{
            _animation.enabled = false;
            this.gameObject.SetActive(false);
        }  
    }
    
    public void SetJianTouActive(bool _active) 
    {
        active = _active;

		foreach (var item in this.GetComponentsInChildren<MeshRenderer>())
		{
            item.enabled = _active;
		}

    }

    /// <summary>
    /// 获取Transform及其子级的包围盒（MeshRenderer），若MeshRenderer包围盒长度为0，则获取BoxCollider包围盒
    /// </summary>
    /// <param name="transform"></param>
    /// <returns></returns>
    private static Bounds GetBounds(Transform transform)
    {
        Quaternion oldRotation = Quaternion.identity;
        bool boundsInitialized = true;
        Bounds bounds = new Bounds(transform.position, Vector3.zero);

        Renderer[] renderers = transform.GetComponentsInChildren<Renderer>();
        foreach (Renderer renderer in renderers)
        {
            if (!boundsInitialized)
            {
                bounds = new Bounds(renderer.transform.position, Vector3.zero);
                boundsInitialized = true;
            }
            bounds.Encapsulate(renderer.bounds);
        }

        if (bounds.size.magnitude == 0)
        {
            BoxCollider[] colliders = transform.GetComponentsInChildren<BoxCollider>();
            foreach (BoxCollider collider in colliders)
            {
                if (!boundsInitialized)
                {
                    bounds = new Bounds(collider.transform.position, Vector3.zero);
                    boundsInitialized = true;
                }
                bounds.Encapsulate(collider.bounds);
            }
        }
        return bounds;
    }
}