using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using DG.Tweening;
using System;
using Wing.Utils;

namespace Wing.Gizmos
{
    public class CameraNavigator : MonoBehaviour
    {
        public const int ElementType = 999;
        public Vector3 Pos = new Vector3(0.8f, 0.8f, 1);

        public enum ENaviType
        {
            PX,
            NX,
            PY,
            NY,
            PZ,
            NZ,
            Center,
        }

        public Camera RendererCamera;
        public GameObject NaviRoot;
        private List<GameObject> Navis = new List<GameObject>();

        private List<Vector3> _angles = new List<Vector3>() {
            Vector3.left, Vector3.right,
            Vector3.down, Vector3.up,
            Vector3.back, Vector3.forward,
            Vector3.zero };
        private List<Color> _colors = new List<Color>() {
            Color.red, Color.white,
            Color.green, Color.white,
            Color.blue, Color.white,
            Color.white };
        private List<MeshRenderer> _naviRenders = new List<MeshRenderer>();
        private Camera _camera;
        private bool _enableNaviUpdate = true;
        private TouchInteraction _interacton;

        void Start()
        {
            _camera = Camera.main;

            this.gameObject.SetLayerWithChildren(Settings.NavLayerName);
            var displayCam = this.gameObject.GetComponentInChildren<Camera>();
            if(displayCam != null)
            {
                displayCam.cullingMask = 1 << this.gameObject.layer;
            }

            _interacton = this.gameObject.AddComponent<TouchInteraction>();
            _interacton.Set(RendererCamera, 1 << this.gameObject.layer);
            _interacton.HoverTargetChangedEvent += _interacton_HoverTargetChangedEvent;
            _interacton.SelectedEvent += _interacton_SelectedEvent;

            for (int i = 0; i < NaviRoot.transform.childCount; i++)
            {
                Transform t = NaviRoot.transform.GetChild(i);
                Navis.Add(t.gameObject);

                MeshRenderer mr = t.GetComponent<MeshRenderer>();
                _naviRenders.Add(mr);
            }
        }

        private void _interacton_SelectedEvent(ElementTag tag)
        {
            if (!_enableNaviUpdate)
            {
                return;
            }

            for (int i = 0; i < Navis.Count; i++)
            {
                _naviRenders[i].material.color = _colors[i];

                Navis[i].SetActive(true);
            }

            if (tag != null)
            {
                int id = int.Parse(tag.ID);

                if (id == (int)ENaviType.Center)
                {
                    //CameraCtrl.Instance.Reset(CameraCtrl.Instance.StateType, CameraCtrl.Instance.Locked, true);
                }
                else
                {
                    _enableNaviUpdate = false;

                    //var currentAngle = _camera.transform.forward;
                    //var targetAngle = _angles[id];
                    var euler = Quaternion.LookRotation(_angles[id], Vector3.up).eulerAngles;
                    Color color = _naviRenders[id].material.color;
                    Tweener tweener = _camera.transform.DORotate(euler, 0.5f);
                    tweener.OnComplete(() =>
                    {
                        _enableNaviUpdate = true;
                        Navis[id].SetActive(false);
                    }).OnUpdate(() =>
                    {
                        color.a = 1 - tweener.timeScale;
                        _naviRenders[id].material.color = color;
                    }).Play();

                    //_camera.gameObject.Tween(0.5f)
                    //    .SetUpdate((scale) =>
                    //    {
                    //        color.a = 1 - scale;
                    //        _naviRenders[id].material.color = color;
                    //        _camera.transform.forward = Vector3.Slerp(currentAngle, targetAngle, scale);
                    //    }).
                    //    SetComplete(() =>
                    //    {
                    //        _enableNaviUpdate = true;
                    //        Navis[id].SetActive(false);
                    //        _camera.transform.forward = targetAngle;
                    //        return false;
                    //    }).
                    //    Play();
                }
            }
        }

        private void _interacton_HoverTargetChangedEvent(ElementTag tag)
        {
            if (_interacton.LastSelectedTag != null)
            {
                int id = int.Parse(_interacton.LastSelectedTag.ID);
                _naviRenders[id].material.color = _colors[id];
            }
            if (tag != null)
            {
                int id = int.Parse(tag.ID);
                ENaviType ntype = (ENaviType)id;
                Color color = _naviRenders[id].material.color * 0.3f;
                color.a = 1;
                _naviRenders[id].material.color = color;
            }
        }

        private void UpdateNavi()
        {
            NaviRoot.transform.eulerAngles = -_camera.transform.eulerAngles;

            Vector3 angles = _camera.transform.eulerAngles;
            float min = 20;
            if (Mathf.Abs(angles.x % 90) > min ||
                Mathf.Abs(angles.y % 90) > min ||
                Mathf.Abs(angles.z % 90) > min)
            {
                for (int i = 0; i < Navis.Count; i++)
                {
                    _naviRenders[i].material.color = _colors[i];

                    Navis[i].SetActive(true);
                }
            }
        }

        void Update()
        {

            UpdateNavi();
        }
    }
}