// 本脚本只在不存在时会生成一次。组件逻辑写在当前脚本内。已存在不会再次生成覆盖 

using System;
using UnityEngine;
using FairyGUI;
using NBC;
using RootMotion.FinalIK;
using Object = UnityEngine.Object;

namespace NBF
{
    public partial class ModelTexture : GComponent
    {
        ModelRenderImage _renderImage;
        private Vector2 _startPos;
        private Vector3 _startRot;
        private SwipeGesture _swipeGesture;
        private bool _focus;

        private bool _canZoom;
        private bool _canPan;
        private Vector3 _zoomLimit;
        private Rect _panLimit;

        private void OnInited()
        {
            SetRotateListening();
            // Stage.inst.on
            TouchHolder.onRollOver.Set(OnFocusIn);
            TouchHolder.onRollOut.Set(OnFocusOut);
            Stage.inst.onMouseWheel.Add(OnMouseWheel);
            // TouchHolder.onm
        }

        public override void Dispose()
        {
            Stage.inst.onMouseWheel.Remove(OnMouseWheel);
            base.Dispose();
        }

        /// <summary>
        /// 加载资产模型
        /// </summary>
        /// <param name="configId"></param>
        public void LoadAsset(int configId)
        {
            //Assets/Resources/gfx/hooks/berserk_hooks/clas_20421_20446/clas_20423.prefab
            //Assets/Resources/gfx/rods/syberia/bolo_10021/bolo_10021_LB400.prefab
            //"Role/test"
            var prefab = Resources.Load("gfx/hooks/berserk_hooks/clas_20421_20446/clas_20423");
            SetModel((GameObject)Object.Instantiate(prefab));
        }

        public void SetModel(GameObject model)
        {
            if (_renderImage == null)
            {
                _renderImage = new ModelRenderImage(ModelHolder.asGraph);
            }

            var ccdIk = model.GetComponent<CCDIK>();
            if (ccdIk != null)
            {
                Object.Destroy(ccdIk);
            }

            var lineRenderer = model.GetComponent<LineRenderer>();
            if (lineRenderer != null)
            {
                Object.Destroy(lineRenderer);
            }

            var rigidbody = model.GetComponent<Rigidbody>();
            if (rigidbody != null)
            {
                rigidbody.isKinematic = true;
            }


            _renderImage.SetModel(model);
            _renderImage.modelRoot.localScale = Vector3.one;

            var previewableAsset = model.GetComponent<PreviewableAsset>();
            if (previewableAsset != null)
            {
                _zoomLimit = previewableAsset.zoom;
                _panLimit = previewableAsset.pan;
                _canPan = previewableAsset.canPan;
                _canZoom = previewableAsset.canZoom;
                // model.transform.localPosition = previewableAsset.position;
                model.transform.localScale = previewableAsset.scale;
                model.transform.localRotation = Quaternion.Euler(previewableAsset.rotation);
            }
            else
            {
                _canPan = false;
                _canZoom = false;
                _zoomLimit = Vector3.zero;
                _panLimit = Rect.zero;
                // model.transform.localPosition = previewableAsset.position;
                model.transform.localScale = Vector3.one;
                model.transform.localRotation = Quaternion.Euler(Vector3.zero);
            }
        }

        /// <summary>
        /// 加载角色模型
        /// </summary>
        public void LoadRole()
        {
        }

        private void SetRotateListening()
        {
            var dragObj = TouchHolder;
            var gesture1 = new SwipeGesture(dragObj);
            gesture1.onMove.Set(OnSwipeMove);
            gesture1.onEnd.Set(OnSwipeEnd);
        }

        #region 旋转和平移

        private void OnSwipeMove(EventContext context)
        {
            var gesture = context.sender as SwipeGesture;
            if (gesture == null) return;
            var v = Vector3.zero;


            if (context.inputEvent.button == 0)
            {
                v.y = -gesture.delta.x * 0.2f;
                v.z = -gesture.delta.y * 0.2f;
                if (!gesture.snapping)
                {
                    v.y = 0;
                    v.z = 0;
                }

                if (Mathf.Abs(v.y) < 1) //消除手抖影响
                    v.y = 0;
                if (Mathf.Abs(v.z) < 1) //消除手抖影响
                    v.z = 0;

                _renderImage.StartRotate(v);
            }
            else if (_canPan)
            {
                v.y = gesture.delta.y * 0.005f;
                v.x = gesture.delta.x * 0.005f;
                //平移
                var pos = _renderImage.modelRoot.localPosition;
                _renderImage.modelRoot.localPosition = new Vector3(pos.x + v.x, pos.y + v.y, pos.z);
            }
        }

        private void OnSwipeEnd(EventContext context)
        {
            _renderImage.StopRotate();
        }

        #endregion

        #region Zoom

        private void OnFocusIn()
        {
            _focus = true;
            Log.Info("focus true");
        }

        private void OnFocusOut()
        {
            _focus = false;
            Log.Info("focus false");
        }

        private void OnMouseWheel(EventContext context)
        {
            if (!_canZoom) return;
            if (!_focus) return;
            float delta = context.inputEvent.mouseWheelDelta / Stage.devicePixelRatio;
            SetZoom(delta * 0.2f);
        }

        private void SetZoom(float delta)
        {
            var pos = _renderImage.modelRoot.localPosition;
            var targetZ = pos.z + delta;
            if (targetZ < _zoomLimit.x)
            {
                targetZ = _zoomLimit.x;
            }
            else if (targetZ > _zoomLimit.y)
            {
                targetZ = _zoomLimit.y;
            }

            _renderImage.modelRoot.localPosition = new Vector3(pos.x, pos.y, targetZ);
        }

        #endregion
    }
}