using AX.MessageSystem;
using System.Collections;
using UniRx;
using UnityEngine;
using UnityEngine.UI;

public class UIFollowTarget : MonoBehaviour
{
    private Transform Target;
    [HideInInspector] public Button m_Button;
    public string IconName;
    public float DistanceY = 0f;
    //显示文字
    public bool ShowInfo;
    private Text m_Text;
    public string Info;

    //拉近
    public bool ZoomIn = true;
    public ZoomInMode Mode = ZoomInMode.Normal;
    public float RotX = 0;
    public float RotY = 30;
    public float Distance = 5f;
    //切换楼层
    public bool ChangeFloor;
    public int FloorNumber;
    public string Buildingfilter = "Floor";
    //显示属性面板
    public bool ShowAttrubePanel;
    public bool isRendering;


    public void LoadIcon(bool isLoad)
    {
        if (isLoad)
        {
            Target = transform;
            if (GameObject.Find(this.name + "Icon") == null)
            {
                //GameObject go = Instantiate(Loaded.Result);
                GameObject go = Instantiate(AssetManager.Instance.Icons.Find(icon => icon.name==IconName))as GameObject;
                go.name = this.name + "Icon";
                go.transform.SetParent(UIManager.GetUIRoot(UIViewType.Icon), false);
                m_Button = go.GetComponent<Button>();
                m_Button.OnClickAsObservable()
               .Subscribe(_ => OnClick());
                m_Text = m_Button.transform.Find("Text").GetComponent<Text>();
                if (ShowInfo)
                {
                    m_Text.gameObject.SetActive(true);
                    m_Text.text = Info;
                }
                else
                {
                    m_Text.gameObject.SetActive(false);
                    m_Text.text = string.Empty;
                }

            }
            isRendering = true;

        }
        else
        {
            if (m_Button != null)
            {
                Destroy(m_Button.gameObject);
                m_Button = null;
            }
            isRendering = false;
        }
    }

    private void OnClick()
    {
        if (ChangeFloor)
        {
            MessageDispatcher.SendMessage("FLOORNUMBER", FloorNumber, Buildingfilter);

        }
        if (ShowAttrubePanel)
        {
            UIManager.Instance.Show<EquipmentRoomAttributePanel>(new EquipmentRoom() { Id=name});
            //AssetManager.EquipmentSelected = this.gameObject;
            //UIPanel.Show<EquipmentRoomAttributePanel>();
        }
        if (ZoomIn)
        {
            switch (Mode)
            {
                case ZoomInMode.Normal:
                    Camera.main.GetComponent<CameraOrbit>().SetCameraView(Target.position, Distance);
                    break;
                case ZoomInMode.RotateAngle:
                    Camera.main.GetComponent<CameraOrbit>().SetCameraView(Target.position, Distance, RotX, RotY);
                    break;
                case ZoomInMode.RotateXAngle:
                    Camera.main.GetComponent<CameraOrbit>().SetCameraView(Target.position, Distance, RotX, Camera.main.GetComponent<CameraOrbit>().y);
                    break;
                case ZoomInMode.RotateYAngle:
                    Camera.main.GetComponent<CameraOrbit>().SetCameraView(Target.position, Distance, Camera.main.GetComponent<CameraOrbit>().x, RotY);
                    break;
            }
        }
        
        
    }

    void Update()
    {
        if (m_Button == null)
            return;

        if (IsInView(transform.position) && isRendering)
        {
            m_Button.gameObject.SetActive(true);
            m_Button.GetComponent<RectTransform>().position = WorldToUI(new Vector3(Target.position.x, Target.position.y + DistanceY, Target.position.z));
        }
        else
            m_Button.gameObject.SetActive(false);

    }

    public bool IsInView(Vector3 worldPos)
    {
        Transform camTransform = Camera.main.transform;
        Vector2 viewPos = Camera.main.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 Vector3 WorldToUI(Vector3 Point)
    {
        Vector3 pos = RectTransformUtility.WorldToScreenPoint(Camera.main, Point);
        pos.z = 0;
        return pos;

    }

    private void OnDestroy()
    {
        LoadIcon(false);
    }

    public void Hide()
    {
       
        StartCoroutine(HideCoroutine());

    }
    
    private IEnumerator HideCoroutine()
    {
        isRendering = false;
        yield return new WaitForSeconds(0.1f);
        gameObject.SetActive(false);

    }
    
}