using UnityEngine;
using UnityEngine.EventSystems;

namespace AlicizaX.UI.Extension
{
    public class UI3DDisplayTouch : MonoBehaviour, IPointerDownHandler, IPointerUpHandler, IDragHandler
    {
        private GameObject m_dragObject;
        private bool m_CanDrag = true;
        private float m_DragSpeed = 20.0f;
        private float m_DragRotation;
        private Vector3 m_ShowRotation = Vector3.zero;
        private Transform view;

        public void SetObject(GameObject obj)
        {
            m_dragObject = obj;
            m_ShowRotation = obj.transform.eulerAngles;
            view = obj.GetComponent<Transform>();
        }

        public void Disopose()
        {
            m_dragObject = null;
            view = null;
        }

        //拖拽
        public void OnDrag(PointerEventData eventData)
        {
            if (!m_CanDrag) return;
            if (!view) return;
            if (!m_dragObject || !(m_DragSpeed > 0.0f)) return;

            var delta = eventData.delta.x;
            var deltaRot = -m_DragSpeed * delta * Time.deltaTime;

            m_DragRotation += deltaRot;
            var showRotation = Quaternion.Euler(m_ShowRotation);
            var showUp = showRotation * Vector3.up;
            showRotation *= Quaternion.AngleAxis(m_DragRotation, showUp);
            view.rotation = showRotation;
        }

        //按下
        public void OnPointerDown(PointerEventData eventData)
        {
        }

        //抬起
        public void OnPointerUp(PointerEventData eventData)
        {
        }
    }
}