using Sirenix.OdinInspector;
using System.Collections;
using System.Linq;
using UnityEditor;
using UnityEngine;

namespace SK.Framework
{
    [ExecuteInEditMode]
    public class SimpleBezierCurvePathAlonger : MonoBehaviour
    {
        public enum UpdateMode
        {
            FixedUpdate,
            Update,
            LateUpdate,
        }

        public Transform target;

        [SerializeField] private SimpleBezierCurvePath path;

        [SerializeField] private float speed = .1f;

        [SerializeField] private UpdateMode updateMode = UpdateMode.Update;

        private float normalized = 0f;

        private Vector3 lastPosition;

        private void FixedUpdate()
        {
            return;
            if (updateMode == UpdateMode.FixedUpdate && path != null)
                MoveAlongPath();
        }

        private void Update()
        {
            return;
            if (updateMode == UpdateMode.Update && path != null)
                MoveAlongPath();
        }

        private void LateUpdate()
        {
            return;
            if (updateMode == UpdateMode.LateUpdate && path != null)
                MoveAlongPath();
        }

        private void MoveAlongPath()
        {
            float t = normalized + speed * Time.deltaTime;
            float max = path.Points.Count - 1 < 1 ? 0 : (path.Loop ? path.Points.Count : path.Points.Count - 1);
            normalized = (path.Loop && max > 0) ? ((t %= max) + (t < 0 ? max : 0)) : Mathf.Clamp(t, 0, max);
            target.position = path.EvaluatePosition(normalized);
            Vector3 forward = target.position - lastPosition;
            target.forward = forward != Vector3.zero ? forward : target.forward;
            lastPosition = target.position;
        }

        private void MoveTargetPointsPath()
        {
            float t = normalized + speed * Time.deltaTime;
            target.position = path.GetPos(normalized).position;
            Vector3 forward = target.position - lastPosition;
            target.forward = forward != Vector3.zero ? forward : target.forward;
            lastPosition = target.position;
        }

        [Button("Play")]
        public void Play()
        {
            isPlaying = true;
            meshPoint = path.GetPos(0);
            target.position = meshPoint.position;
            target.forward = meshPoint.normail;
            index = 0;
        }

        public bool isPlaying;
        public float normailFloor = 0.05f;
        public float index;
        public MeshPoint meshPoint; 
        public GameObject toolObj;
        private GameObject toolPrefab;
        [ValueDropdown("GetAllToolModel")]
        [ShowInInspector]
        public GameObject ToolPrefab
        {
            get
            {
                return toolPrefab;
            }
            set
            {
                if (toolPrefab != value)
                {
                    toolPrefab = value;
                    if (toolObj != null)
                    {
                        DestroyImmediate(toolObj);
                    }
                    toolObj = GameObject.Instantiate(toolPrefab);

                    if (target != null)
                    {
                        toolObj.transform.parent = target.transform;
                        toolObj.transform.localPosition = Vector3.zero;
                        toolObj.transform.localRotation = Quaternion.identity;
                    }
                }
            }
        }

#if UNITY_EDITOR
        private void OnEnable()
        {
            EditorApplication.update += EditorUpdate;
        }
        private void OnDisable()
        {
            EditorApplication.update -= EditorUpdate;
        }

        void EditorUpdate()
        {
            if (!isPlaying) return;
            index += speed * Time.deltaTime;
            meshPoint = path.GetPos(index);
            meshPoint.position = meshPoint.position + meshPoint.normail.normalized * normailFloor;
            target.position = Vector3.Lerp(target.position, meshPoint.position, 0.5f);
            target.forward = Vector3.Slerp(target.forward, meshPoint.normail, speed);
            if (index > 1)
            {
                index = 0;
                isPlaying = false;
            }
        }

        private static IEnumerable GetAllToolModel()
        {
            var root = "Assets/ChivaXR/SimulationToolDev/ToolManager/ToolModel";

            return UnityEditor.AssetDatabase.GetAllAssetPaths()
                .Where(x => x.StartsWith(root))
                .Select(x => x.Substring(root.Length))
                .Select(x => new ValueDropdownItem(x, UnityEditor.AssetDatabase.LoadAssetAtPath<UnityEngine.GameObject>(root + x)));
        }
#endif
    }
}