using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using System.Linq;

public class TipPlayerExx : MonoBehaviour
{
    public static TipPlayerExx Instance;

    private void Awake()
    {
        Instance = this;
    }

    public Text txtTitle;

    public Button btnTitle;

    Animator anim;

    Data currentInfo;

    TipShow[] lstTipShow;

    public float maxDistance = 10f;

    void Start()
    {
        anim = GetComponent<Animator>();

        if (btnTitle != null)
            btnTitle.onClick.AddListener(OnBtnTitleClick);

        // lstTipShow = FindObjectsOfType<TipShow>();
    }

    void OnBtnTitleClick()
    {
        GameObject obj = GameObject.Find(currentInfo.ParentID);
        if (obj != null)
        {
            BaseShow[] bss = obj.GetComponents<BaseShow>();
            foreach (var bs in bss)
            {
                bs.OnClick();
            }

            HideTipOnClick();
        }
    }

    bool isShow;

    public void ShowTip(Data info)
    {
        if (isShow)
        {
            if (currentInfo == info)
                return;
            else
            {
                currentInfo = info;
                txtTitle.text = info.Title;
            }
        }
        else
        {
            if (isClicked && clickedInfo == info)
                return;

            isShow = true;
            currentInfo = info;
            txtTitle.text = info.Title;
            isClicked = false;

            // 显示
            if (anim != null)
            {
                // anim.SetBool("IsShow", true);
                anim.SetTrigger("ShowTip");
            }
        }
    }

    bool isClicked;
    Data clickedInfo;
    public void HideTipOnClick()
    {
        clickedInfo = currentInfo;
        isClicked = true;

        HideTip();
    }

    public void HideTip()
    {
        isShow = false;
        txtTitle.text = "";
        currentInfo = null;
        // 关闭
        if (anim != null)
        {
            //anim.SetBool("IsShow", false);
            anim.SetTrigger("HideTip");
        }
    }

    /// <summary>
    /// 判断位置是否在相机视野内
    /// </summary>
    /// <param name="worldPos"></param>
    /// <returns></returns>
    private bool IsInViewX(Vector3 worldPos)
    {
        Transform camTransform = CommonData.MainCamera.transform;
        Vector2 viewPos = CommonData.MainCamera.WorldToViewportPoint(worldPos);
        Vector3 dir = (worldPos - camTransform.position).normalized;
        float dot = Vector3.Dot(camTransform.forward, dir);//判断物体是否在相机前面

        if (dot > 0
            && viewPos.x >= 0 && viewPos.x <= 1
            && viewPos.y >= 0 && viewPos.y <= 1)
            return true;
        else
            return false;
    }

    public float xMin = 0;
    public float yMin = 0;
    public float xMax = 1;
    public float yMax = 1;

    public bool IsInView(Vector3 pos)
    {
        Camera mCamera = CommonData.MainCamera;
        //转化为视角坐标
        Vector3 viewPos = mCamera.WorldToViewportPoint(pos);
        // z<0代表在相机背后
        if (viewPos.z < 0) return false;
        //太远了！看不到了！
        if (viewPos.z > maxDistance)
            return false;
        // x,y取值在 0~1之外时代表在视角范围外；
        if (viewPos.x < xMin || viewPos.y < yMin || viewPos.x > xMax || viewPos.y > yMax)
            return false;
        return true;
    }

    private void Update()
    {
        if (lstTipShow == null || lstTipShow.Length == 0)
        {
            lstTipShow = FindObjectsOfType<TipShow>();
        }

        if (lstTipShow.Any(ts => IsInView(ts.transform.position)))
        {
            var result = lstTipShow.Where(ts => IsInView(ts.transform.position));

            // Debug.Log(result.Count());
            //string stmp = null;
            //foreach (var item in result)
            //{
            //    stmp += "|" + item.name;
            //}
            //Debug.Log(stmp);

            TipShow tmp = result.Max();
            if (Vector3.Distance(CommonData.MainCamera.transform.position, tmp.transform.position) < maxDistance)
            {
                ShowTip(tmp.info);
            }
            else
            {
                if (isShow)
                {
                    HideTip();
                }
            }
        }
        else
        {
            if (isShow)
            {
                HideTip();
            }
        }
    }


    //public float maxDistance = 500;
    //void Update()
    //{
    //    // 获取屏幕中心点的坐标
    //    Vector3 screenCenter = new Vector3(Screen.width / 2, Screen.height / 2, 0);

    //    // 将屏幕中心点的坐标转换为世界坐标系中的坐标
    //    Ray ray = CommonData.MainCamera.ScreenPointToRay(screenCenter);
    //    Debug.DrawRay(ray.origin, ray.direction, Color.red);
    //    RaycastHit hit;

    //    // 如果射线与物体相交，则表示物体在摄像机的视线范围内
    //    if (Physics.Raycast(ray, out hit, maxDistance))
    //    {
    //        Debug.Log(hit.collider.name);
    //        TipShow ts = hit.collider.GetComponent<TipShow>();
    //        if(ts != null)
    //        {
    //            Debug.Log(ts.gameObject.name);
    //        }
    //    }
    //}
}