using UnityEngine;
using System.Collections.Generic;
using Rokid.UXR.Utility;

namespace Rokid.UXR.Interaction
{
    public class HandVisual : MonoBehaviour
    {
        /// <summary>
        /// HandType
        /// </summary>
        [SerializeField]
        private HandType hand;
        /// <summary>
        /// Bone Coordinate Axis Transformation"
        /// </summary>
        [SerializeField]
        private Vector3 axisRot = Vector3.zero;
        /// <summary>
        /// The root joint of the hand is generally the "Wrist."
        /// </summary>
        [SerializeField]
        private Transform handRootSkeleton;
        /// <summary>
        /// Hand MeshRender
        /// </summary>
        [SerializeField]
        private SkinnedMeshRenderer handMesh;
        /// <summary>
        /// Hand Skeleton
        /// </summary>
        /// <typeparam name="Transform"></typeparam>
        /// <returns></returns>
        [SerializeField]
        private List<Transform> handSkeletons = new List<Transform>();

        private bool pokeSelect = false;
        private Vector3 pokeClosePoint = Vector3.zero;

#if UNITY_EDITOR

        private float index_mcp_pip_dis;
        private float middle_mcp_pip_dis;
        private float ring_mcp_pip_dis;
        private float pinky_mcp_pip_dis;

        private float index_dip_pip_dis;
        private float middle_dip_pip_dis;
        private float ring_dip_pip_dis;
        private float pinky_dip_pip_dis;


        private float index_dip_tip_dis;
        private float middle_dip_tip_dis;
        private float ring_dip_tip_dis;
        private float pinky_dip_tip_dis;

        private float wrist_middle_cmp_dis;

        [SerializeField]
        private float[] boneDis = new float[13];
#endif

        private void Start()
        {
            if (!Utils.IsAndroidPlatfrom())
            {
                if (Utils.IsAndroidPlatfrom())
                {
                    RKLog.Error("====HandVisual==== Error Destory Switch Active!!!");
                }
                Destroy(GetComponent<InputModuleSwitchActive>());
                this.gameObject.SetActive(false);
            }
            InteractorStateChange.OnPokeSelectUpdate += OnPokeSelectUpdate;
            InteractorStateChange.OnPokeUnSelectUpdate += OnPokeUnSelectUpdate;
        }
        private void OnDestroy()
        {
            InteractorStateChange.OnPokeSelectUpdate -= OnPokeSelectUpdate;
            InteractorStateChange.OnPokeUnSelectUpdate -= OnPokeUnSelectUpdate;
        }

        private void OnEnable()
        {
            if (Utils.IsAndroidPlatfrom())
                GesEventInput.OnRenderHand += OnRenderHand;
        }

        private void OnDisable()
        {
            if (Utils.IsAndroidPlatfrom())
                GesEventInput.OnRenderHand -= OnRenderHand;
        }

        private void OnPokeUnSelectUpdate(HandType handType)
        {
            if (handType == this.hand)
            {
                pokeSelect = false;
            }
        }

        private void OnPokeSelectUpdate(HandType handType, Vector3 pokeClosePoint)
        {
            if (handType == this.hand)
            {
                this.pokeClosePoint = pokeClosePoint;
                pokeSelect = true;
            }
        }

#if UNITY_EDITOR
        [ContextMenu("AutoSetSkeletons")]
        private void AutoSetSkeletons()
        {
            handSkeletons.Add(handRootSkeleton);
            for (int i = 0; i < handRootSkeleton.childCount; i++)
            {
                AutoSetSkeletons(handRootSkeleton.GetChild(i), handSkeletons);
            }

            index_mcp_pip_dis = Vector3.Distance(handSkeletons[5].position, handSkeletons[6].position);
            middle_mcp_pip_dis = Vector3.Distance(handSkeletons[9].position, handSkeletons[10].position);
            ring_mcp_pip_dis = Vector3.Distance(handSkeletons[13].position, handSkeletons[14].position);
            pinky_mcp_pip_dis = Vector3.Distance(handSkeletons[17].position, handSkeletons[18].position);

            index_dip_pip_dis = Vector3.Distance(handSkeletons[7].position, handSkeletons[6].position);
            middle_dip_pip_dis = Vector3.Distance(handSkeletons[11].position, handSkeletons[10].position);
            ring_dip_pip_dis = Vector3.Distance(handSkeletons[15].position, handSkeletons[14].position);
            pinky_dip_pip_dis = Vector3.Distance(handSkeletons[19].position, handSkeletons[18].position);

            index_dip_tip_dis = Vector3.Distance(handSkeletons[7].position, handSkeletons[8].position);
            middle_dip_tip_dis = Vector3.Distance(handSkeletons[11].position, handSkeletons[12].position);
            ring_dip_tip_dis = Vector3.Distance(handSkeletons[15].position, handSkeletons[16].position);
            pinky_dip_tip_dis = Vector3.Distance(handSkeletons[19].position, handSkeletons[20].position);

            wrist_middle_cmp_dis = Vector3.Distance(handSkeletons[0].position, handSkeletons[9].position);

            boneDis[0] = wrist_middle_cmp_dis;

            boneDis[1] = index_mcp_pip_dis;
            boneDis[2] = middle_mcp_pip_dis;
            boneDis[3] = ring_mcp_pip_dis;
            boneDis[4] = pinky_mcp_pip_dis;

            boneDis[5] = index_dip_pip_dis;
            boneDis[6] = middle_dip_pip_dis;
            boneDis[7] = ring_dip_pip_dis;
            boneDis[8] = pinky_dip_pip_dis;

            boneDis[9] = index_dip_tip_dis;
            boneDis[10] = middle_dip_tip_dis;
            boneDis[11] = ring_dip_tip_dis;
            boneDis[12] = pinky_dip_tip_dis;
        }
        /// <summary>
        /// auto find skeletons
        /// </summary>
        /// <param name="skeleton"></param>
        /// <param name="handSkeletons"></param>
        private void AutoSetSkeletons(Transform skeleton, List<Transform> handSkeletons)
        {
            handSkeletons.Add(skeleton);
            if (skeleton.childCount > 0)
            {
                for (int i = 0; i < skeleton.childCount; i++)
                {
                    AutoSetSkeletons(skeleton.GetChild(i), handSkeletons);
                }
            }
        }
#endif

        private void OnRenderHand(HandType hand, GestureBean data)
        {
            Quaternion[] rotations = data.skeletonsRot;
            if (hand == this.hand)
            {
                for (int i = 0; i < handSkeletons.Count; i++)
                {
                    handSkeletons[i].rotation = rotations[i] * Quaternion.Euler(axisRot);
                    Vector3 offset = pokeClosePoint - GesEventInput.Instance.GetSkeletonPose(SkeletonIndexFlag.INDEX_FINGER_TIP, hand).position;
                    if (pokeSelect)
                    {
                        handSkeletons[i].position = data.skeletons[i] + offset;
                    }
                    else
                    {
                        handSkeletons[i].position = data.skeletons[i];
                    }
                }
            }
        }

        /// <summary>
        /// Update hand mesh materials
        /// </summary>
        /// <param name="materials"></param>
        public void UpdateHandMeshMaterials(Material[] materials)
        {
            handMesh.materials = materials;
        }

        public void SetHandMeshActive(bool active)
        {
            handMesh.gameObject.SetActive(active);
        }
    }
}