using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Rendering;

namespace Assets.AR
{
    public abstract class ARGameObjectsController : MonoBehaviour
    {
        public float MaximumVisibilityDistance = 200f;
        private readonly Vector3 CameraOriginOffset = Vector3.up * -100f;
        protected static readonly Vector3 DefaultObjectPosition = new Vector3(0.0f, 1000f, 0.0f);
        protected List<ARGameObject> arObjects = new List<ARGameObject>();
        protected Material matShadow { get; set; }
        protected Material matModelMask;
        protected AVProVideoPlayer videoPlayer { get; set; }
        protected VideoPointsSync videoSync{ get; set; }
        protected Vector3 cameraPositionOffset { get; set; }
        private GameObject panoramaObject;
        private Material panoramaMaterial;
        private Material skyboxMaterialBackup;
        protected GameObject trajectoryObject;
        private float ambientIntensity;
        private GameObject camGo;
        protected Dictionary<int, ARGameObjectsController.Segment> trajectorySegments = new Dictionary<int, ARGameObjectsController.Segment>();
        protected int lapCount = 1;
        protected double lapLength;
        
        public bool AR360Version { get; private set; }

        public Camera UnityCamera { get; protected set; }

        public float FrameIndexDistanceCorrection { get; set; }

        public ARRoute Route { get; private set; }

        protected float CameraDistance { get; private set; }

        public float TargetCameraDistance { get; private set; }

        public Camera PanoramaCamera { get; private set; }

        public bool PassedPanorama { get; set; }

        public bool IsMultilap => this.lapCount > 1;

        protected virtual void Awake()
        {
            this.ambientIntensity = RenderSettings.ambientIntensity;
            this.matShadow = Resources.Load<Material>("UI/Material/TransparentPlane");
            //this.matModelMask = Resources.Load<Material>("Materials/ModelDepth");
            this.arObjects.Clear();
            this.arObjects.AddRange(FindObjectsOfType<ARGameObject>());
            SetupCamera();
        }

        protected virtual void SetupCamera()
        {
            this.UnityCamera = Camera.main;
        }

        public virtual void SetArRoute(ARRoute route, VideoPointsSync videoSync,AVProVideoPlayer mediaPlayer)
        {
            videoPlayer = mediaPlayer;
            this.Route = route;
            this.videoSync = videoSync;
            if (this.Route.CameraRotationsRear != null && this.Route.CameraRotationsRear.Length == this.Route.CameraRotations.Length)
            {
                this.AR360Version = true;
                ARGameObject.MaxDistanceVisibilityModels = 200f;
                this.MaximumVisibilityDistance = 500f;
            }
            else
            {
                this.AR360Version = false;
                ARGameObject.MaxDistanceVisibilityModels = 80f;
                this.MaximumVisibilityDistance = 200f;
            }
            if (route == null)
                return;
            foreach (ARGameObject arObject in this.arObjects)
            {
                arObject.VideoSync = videoSync;
                arObject.Route = route;
            }
            this.trajectoryObject = new GameObject("TrajectoryMesh");
            this.trajectoryObject.transform.parent = this.transform;
            //this.trajectoryObject.layer = 9;
        }

        protected virtual void UpdateGameObjects(
          float videoFrame,
          float visibilityRear,
          float visibilityFront)
        {
            foreach (ARGameObject arObject in this.arObjects)
            {
                arObject.CameraPositionOffset = this.cameraPositionOffset;
                if (arObject is ARLaneGameObject arLaneObject)
                    arLaneObject.FrameIndexDistanceCorrection = this.FrameIndexDistanceCorrection;
                if (arObject.TimeTransforms != null && arObject.TimeTransforms.Length > 1)
                    arObject.UpdateByTimeDefinitions(videoFrame);
                arObject.UpdateVisibility(videoFrame, visibilityRear, visibilityFront, this.IsMultilap);
                bool flag = this.IsObjectActive(arObject);
            }
        }

        protected virtual bool IsObjectActive(ARGameObject arObject) => (double)arObject.VisibilityLevel > 0.0 ;
     

        protected virtual Material GetTrajectoryMaterial() => this.matShadow;

        
        protected virtual void Update()
        {
            if (this.Route == null)
                return;
   
            var num1 = this.videoPlayer.CurrentFrame - (float)this.Route.VideoFrameOffset;
            {
                this.cameraPositionOffset = this.Route.GetCameraPosition(num1) - this.CameraOriginOffset;
                UnityCamera.transform.position = this.CameraOriginOffset;
                UnityCamera.transform.rotation = this.Route.GetCameraRotation(num1);
                //this.Route.SetCameraProjection(num1, Camera.main); //TODO:暂时注释掉
            }
            this.CameraDistance = this.videoSync.GetDistanceForVideoFrame(num1 + this.FrameIndexDistanceCorrection);
            var num2 = Mathf.Min(float.MaxValue, this.Route.GetVisibility(num1));
            var num3 = num2;
            var visibilityRear = 200f;
            if ((double)num3 == 0.0)
                num3 = 600f;
            if ((double)visibilityRear == 0.0)
                visibilityRear = 600f;
            this.UpdateTrajectory(num1, num3);//更新轨迹
            this.UpdateGameObjects(num1, visibilityRear, num3);//更新骑手等位置
        }


        //更新当前可见轨迹
        private void UpdateTrajectory(float frame, float defaultVisibility)
        {
            int start;
            int end;
            this.Route.GetVisibleSlamSegments((int)frame, out start, out end, defaultVisibility);
            List<int> intList = new List<int>();
            foreach (int key in this.trajectorySegments.Keys)
            {
                if (key < start || key > end)
                    intList.Add(key);
            }
            foreach (int key in intList)
            {
                UnityEngine.Object.Destroy((UnityEngine.Object)this.trajectorySegments[key].GameObject);
                this.trajectorySegments.Remove(key);
            }
            for (int index = start; index <= end; ++index)
            {
                if (!this.trajectorySegments.ContainsKey(index))
                {
                    GameObject trajectory = this.CreateTrajectory(index, 0.0f, 0.0f);
                    ARGameObjectsController.Segment segment = new ARGameObjectsController.Segment(trajectory, trajectory.transform.position);
                    this.trajectorySegments.Add(index, segment);
                }
            }
            foreach (int key in this.trajectorySegments.Keys)
            {
                ARGameObjectsController.Segment trajectorySegment = this.trajectorySegments[key];
                trajectorySegment.GameObject.transform.position = trajectorySegment.Position - this.cameraPositionOffset;
            }
        }

        //创建轨迹
        protected virtual GameObject CreateTrajectory(
          int segment,
          float lOffset,
          float rOffset,
          float margin = float.NaN)
        {
            GameObject trajectory = ARGameObjectFactory.CreateTrajectory(this.Route, segment, lOffset, rOffset, margin);
            trajectory.transform.parent = this.trajectoryObject.transform;
            //trajectory.layer = 9;
            trajectory.GetComponent<MeshRenderer>().shadowCastingMode = ShadowCastingMode.Off;
            trajectory.GetComponent<MeshRenderer>().material = this.GetTrajectoryMaterial();
            return trajectory;
        }

        protected Vector3 GetCameraPosition(float frame) => this.Route.GetCameraPosition(frame) - this.cameraPositionOffset;

        public class Segment
        {
            public GameObject GameObject;
            public Vector3 Position;

            public Segment(GameObject gameObject, Vector3 position)
            {
                this.GameObject = gameObject;
                this.Position = position;
            }
        }
    }
}