using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using UnityEditor;
using UnityEngine;

namespace Valve.VR
{

    [CustomEditor(typeof(SteamVR_Skeleton_Poser))]
    public class SteamVR_Skeleton_PoserEditor : Editor
    {
        private SerializedProperty skeletonMainPoseProperty;
        private SerializedProperty skeletonAdditionalPosesProperty;

        private SerializedProperty showLeftPreviewProperty;
        private SerializedProperty showRightPreviewProperty;

        private SerializedProperty previewLeftInstanceProperty;
        private SerializedProperty previewRightInstanceProperty;

        private SerializedProperty previewLeftHandPrefab;
        private SerializedProperty previewRightHandPrefab;

        private SerializedProperty previewPoseSelection;

        private SerializedProperty poseEditorExpanded;
        private SerializedProperty blendEditorExpanded;

        private SerializedProperty poserScale;



        private SerializedProperty blendingBehaviourArray;


        Texture handTexL;
        Texture handTexR;


        private SteamVR_Skeleton_Poser poser;

        private bool PoseChanged = false;

        protected void OnEnable()
        {
            skeletonMainPoseProperty = serializedObject.FindProperty("skeletonMainPose");
            skeletonAdditionalPosesProperty = serializedObject.FindProperty("skeletonAdditionalPoses");

            showLeftPreviewProperty = serializedObject.FindProperty("showLeftPreview");
            showRightPreviewProperty = serializedObject.FindProperty("showRightPreview");

            previewLeftInstanceProperty = serializedObject.FindProperty("previewLeftInstance");
            previewRightInstanceProperty = serializedObject.FindProperty("previewRightInstance");

            previewLeftHandPrefab = serializedObject.FindProperty("overridePreviewLeftHandPrefab");
            previewRightHandPrefab = serializedObject.FindProperty("overridePreviewRightHandPrefab");

            previewPoseSelection = serializedObject.FindProperty("previewPoseSelection");

            poseEditorExpanded = serializedObject.FindProperty("poseEditorExpanded");
            blendEditorExpanded = serializedObject.FindProperty("blendEditorExpanded");

            poserScale = serializedObject.FindProperty("scale");


            blendingBehaviourArray = serializedObject.FindProperty("blendingBehaviours");


            poser = (SteamVR_Skeleton_Poser)target;
        }

        protected void LoadDefaultPreviewHands()
        {
            if (previewLeftHandPrefab.objectReferenceValue == null)
            {
                previewLeftHandPrefab.objectReferenceValue = SteamVR_Settings.instance.previewHandLeft;
            }

            if (previewRightHandPrefab.objectReferenceValue == null)
            {
                previewRightHandPrefab.objectReferenceValue = SteamVR_Settings.instance.previewHandRight;
            }
        }

        private static bool previewErrorThrown = false;

        protected void UpdatePreviewHand(SerializedProperty instanceProperty, SerializedProperty showPreviewProperty, GameObject previewPrefab, SteamVR_Skeleton_Pose_Hand handData, SteamVR_Skeleton_Pose sourcePose, bool forceUpdate)
        {
            GameObject preview = instanceProperty.objectReferenceValue as GameObject;
            //EditorGUILayout.PropertyField(showPreviewProperty);

            if (showPreviewProperty.boolValue)
            {
                if (forceUpdate && preview != null)
                {
                    DestroyImmediate(preview);
                }

                if (preview == null)
                {
                    if (previewPrefab == null)
                    {
                        if (previewErrorThrown == false)
                            Debug.LogError("hand preview not found. Verify SteamVRSettings.previewHandLeft and previewHandRight are set to valid prefabs.");
                        previewErrorThrown = true;
                        return;
                    }

                    preview = GameObject.Instantiate<GameObject>(previewPrefab);
                    preview.transform.localScale = Vector3.one * poserScale.floatValue;
                    preview.transform.parent = poser.transform;
                    preview.transform.localPosition = Vector3.zero;
                    preview.transform.localRotation = Quaternion.identity;

                    SteamVR_Behaviour_Skeleton previewSkeleton = null;

                    if (preview != null)
                        previewSkeleton = preview.GetComponent<SteamVR_Behaviour_Skeleton>();

                    if (previewSkeleton != null)
                    {
                        if (handData.bonePositions == null || handData.bonePositions.Length == 0)
                        {
                            SteamVR_Skeleton_Pose poseResource = (SteamVR_Skeleton_Pose)Resources.Load("ReferencePose_OpenHand");
                            DeepCopyPose(poseResource, sourcePose);
                            EditorUtility.SetDirty(sourcePose);
                        }

                        preview.transform.localPosition = Vector3.zero;
                        preview.transform.localRotation = Quaternion.identity;
                        preview.transform.parent = null;
                        preview.transform.localScale = Vector3.one * poserScale.floatValue;
                        preview.transform.parent = poser.transform;

                        preview.transform.localRotation = Quaternion.Inverse(handData.rotation);
                        preview.transform.position = preview.transform.TransformPoint(-handData.position);


                        for (int boneIndex = 0; boneIndex < handData.bonePositions.Length; boneIndex++)
                        {
                            Transform bone = previewSkeleton.GetBone(boneIndex);
                            bone.localPosition = handData.bonePositions[boneIndex];
                            bone.localRotation = handData.boneRotations[boneIndex];
                        }
                    }
                    SceneView.RepaintAll();
                    instanceProperty.objectReferenceValue = preview;
                }
            }
            else
            {
                if (preview != null)
                {
                    DestroyImmediate(preview);
                    SceneView.RepaintAll();
                }
            }
        }

        protected void ZeroTransformParents(Transform toZero, Transform stopAt)
        {
            if (toZero == null)
                return;

            toZero.localPosition = Vector3.zero;
            toZero.localRotation = Quaternion.identity;

            if (toZero == stopAt)
                return;

            ZeroTransformParents(toZero.parent, stopAt);
        }

        protected EVRSkeletalReferencePose defaultReferencePose = EVRSkeletalReferencePose.OpenHand;
        protected EVRSkeletalReferencePose forceToReferencePose = EVRSkeletalReferencePose.OpenHand;

        protected void SaveHandData(SteamVR_Skeleton_Pose_Hand handData, SteamVR_Behaviour_Skeleton thisSkeleton)
        {
            handData.position = thisSkeleton.transform.InverseTransformPoint(poser.transform.position);
            //handData.position = thisSkeleton.transform.localPosition;
            handData.rotation = Quaternion.Inverse(thisSkeleton.transform.localRotation);

            handData.bonePositions = new Vector3[SteamVR_Action_Skeleton.numBones];
            handData.boneRotations = new Quaternion[SteamVR_Action_Skeleton.numBones];

            for (int boneIndex = 0; boneIndex < SteamVR_Action_Skeleton.numBones; boneIndex++)
            {
                Transform bone = thisSkeleton.GetBone(boneIndex);
                handData.bonePositions[boneIndex] = bone.localPosition;
                handData.boneRotations[boneIndex] = bone.localRotation;
            }

            EditorUtility.SetDirty(activePose);
        }

        protected void DrawHand(bool showHand, SteamVR_Skeleton_Pose_Hand handData, SteamVR_Skeleton_Pose_Hand otherData, bool getFromOpposite, SerializedProperty showPreviewProperty)
        {
            SteamVR_Behaviour_Skeleton thisSkeleton;
            SteamVR_Behaviour_Skeleton oppositeSkeleton;
            string thisSourceString;
            string oppositeSourceString;

            if (handData.inputSource == SteamVR_Input_Sources.LeftHand)
            {
                thisSkeleton = leftSkeleton;
                thisSourceString = "Left Hand";
                oppositeSourceString = "Right Hand";
                oppositeSkeleton = rightSkeleton;
            }
            else
            {
                thisSkeleton = rightSkeleton;
                thisSourceString = "Right Hand";
                oppositeSourceString = "Left Hand";
                oppositeSkeleton = leftSkeleton;
            }


            if (showHand)
            {
                if (getFromOpposite)
                {
                    bool confirm = EditorUtility.DisplayDialog("SteamVR", string.Format("This will overwrite your current {0} skeleton data. (with data from the {1} skeleton)", thisSourceString, oppositeSourceString), "Overwrite", "Cancel");
                    if (confirm)
                    {
                        Vector3 reflectedPosition = new Vector3(-oppositeSkeleton.transform.localPosition.x, oppositeSkeleton.transform.localPosition.y, oppositeSkeleton.transform.localPosition.z);
                        thisSkeleton.transform.localPosition = reflectedPosition;

                        Quaternion oppositeRotation = oppositeSkeleton.transform.localRotation;
                        Quaternion reflectedRotation = new Quaternion(-oppositeRotation.x, oppositeRotation.y, oppositeRotation.z, -oppositeRotation.w);
                        thisSkeleton.transform.localRotation = reflectedRotation;


                        for (int boneIndex = 0; boneIndex < SteamVR_Action_Skeleton.numBones; boneIndex++)
                        {
                            Transform boneThis = thisSkeleton.GetBone(boneIndex);
                            Transform boneOpposite = oppositeSkeleton.GetBone(boneIndex);

                            boneThis.localPosition = boneOpposite.localPosition;
                            boneThis.localRotation = boneOpposite.localRotation;

                        }

                        handData.thumbFingerMovementType = otherData.thumbFingerMovementType;
                        handData.indexFingerMovementType = otherData.indexFingerMovementType;
                        handData.middleFingerMovementType = otherData.middleFingerMovementType;
                        handData.ringFingerMovementType = otherData.ringFingerMovementType;
                        handData.pinkyFingerMovementType = otherData.pinkyFingerMovementType;

                        EditorUtility.SetDirty(poser.skeletonMainPose);
                    }
                }

            }

            EditorGUIUtility.labelWidth = 120;
            SteamVR_Skeleton_FingerExtensionTypes newThumb = (SteamVR_Skeleton_FingerExtensionTypes)EditorGUILayout.EnumPopup("Thumb movement", handData.thumbFingerMovementType);
            SteamVR_Skeleton_FingerExtensionTypes newIndex = (SteamVR_Skeleton_FingerExtensionTypes)EditorGUILayout.EnumPopup("Index movement", handData.indexFingerMovementType);
            SteamVR_Skeleton_FingerExtensionTypes newMiddle = (SteamVR_Skeleton_FingerExtensionTypes)EditorGUILayout.EnumPopup("Middle movement", handData.middleFingerMovementType);
            SteamVR_Skeleton_FingerExtensionTypes newRing = (SteamVR_Skeleton_FingerExtensionTypes)EditorGUILayout.EnumPopup("Ring movement", handData.ringFingerMovementType);
            SteamVR_Skeleton_FingerExtensionTypes newPinky = (SteamVR_Skeleton_FingerExtensionTypes)EditorGUILayout.EnumPopup("Pinky movement", handData.pinkyFingerMovementType);

            EditorGUILayout.Space();

            EditorGUILayout.PropertyField(showPreviewProperty);
            EditorGUIUtility.labelWidth = 0;

            if (newThumb != handData.thumbFingerMovementType || newIndex != handData.indexFingerMovementType ||
                    newMiddle != handData.middleFingerMovementType || newRing != handData.ringFingerMovementType ||
                    newPinky != handData.pinkyFingerMovementType)
            {
                handData.thumbFingerMovementType = newThumb;
                handData.indexFingerMovementType = newIndex;
                handData.middleFingerMovementType = newMiddle;
                handData.ringFingerMovementType = newRing;
                handData.pinkyFingerMovementType = newPinky;

                EditorUtility.SetDirty(poser.skeletonMainPose);
            }
        }

        protected void DrawPoseControlButtons()
        {
            GameObject leftInstance = previewLeftInstanceProperty.objectReferenceValue as GameObject;
            leftSkeleton = null;

            if (leftInstance != null)
                leftSkeleton = leftInstance.GetComponent<SteamVR_Behaviour_Skeleton>();

            GameObject rightInstance = previewRightInstanceProperty.objectReferenceValue as GameObject;
            rightSkeleton = null;

            if (rightInstance != null)
                rightSkeleton = rightInstance.GetComponent<SteamVR_Behaviour_Skeleton>();



            //only allow saving if a hand is opened for editing
            EditorGUI.BeginDisabledGroup(showRightPreviewProperty.boolValue == false && showLeftPreviewProperty.boolValue == false);
            GUI.color = new Color(0.9f, 1.0f, 0.9f);
            // save both hands at once, or whichever are being edited
            bool save = GUILayout.Button(string.Format("Save Pose"));
            if (save)
            {
                if (showRightPreviewProperty.boolValue)
                    SaveHandData(activePose.rightHand, rightSkeleton);
                if (showLeftPreviewProperty.boolValue)
                    SaveHandData(activePose.leftHand, leftSkeleton);
            }
            GUI.color = Color.white;
            EditorGUI.EndDisabledGroup();

            //MIRRORING
            //only allow mirroring if both hands are opened for editing
            EditorGUI.BeginDisabledGroup(showRightPreviewProperty.boolValue == false || showLeftPreviewProperty.boolValue == false);

            EditorGUILayout.Space();

            if (GUILayout.Button("Import Pose"))
            {
                CopyPoseSelect();
            }

            EditorGUI.EndDisabledGroup();


            GUILayout.Space(32);


            GUILayout.Label("Reference Pose:");
            EditorGUILayout.Space();
            forceToReferencePose = (EVRSkeletalReferencePose)EditorGUILayout.EnumPopup(forceToReferencePose);
            GUI.color = new Color(1.0f, 0.73f, 0.7f);
            bool forcePose = GUILayout.Button("RESET TO REFERENCE POSE");
            GUI.color = Color.white;

            if (forcePose)
            {
                bool confirm = EditorUtility.DisplayDialog("SteamVR", string.Format("This will overwrite your current skeleton data. (with data from the {0} reference pose)", forceToReferencePose.ToString()), "Overwrite", "Cancel");
                if (confirm)
                {
                    if (forceToReferencePose == EVRSkeletalReferencePose.GripLimit)
                    {
                        // grip limit is controller-specific, the rest use a baked pose
                        if (showLeftPreviewProperty.boolValue)
                            leftSkeleton.ForceToReferencePose(forceToReferencePose);
                        if (showRightPreviewProperty.boolValue)
                            rightSkeleton.ForceToReferencePose(forceToReferencePose);
                    }
                    else
                    {
                        SteamVR_Skeleton_Pose poseResource = null;
                        if (forceToReferencePose == EVRSkeletalReferencePose.OpenHand)
                            poseResource = (SteamVR_Skeleton_Pose)Resources.Load("ReferencePose_OpenHand");
                        if (forceToReferencePose == EVRSkeletalReferencePose.Fist)
                            poseResource = (SteamVR_Skeleton_Pose)Resources.Load("ReferencePose_Fist");
                        if (forceToReferencePose == EVRSkeletalReferencePose.BindPose)
                            poseResource = (SteamVR_Skeleton_Pose)Resources.Load("ReferencePose_BindPose");

                        DeepCopyPose(poseResource, activePose);
                    }
                }
            }


        }


        void CopyPoseSelect()
        {
            string selected = EditorUtility.OpenFilePanel("Open Skeleton Pose ScriptableObject", Application.dataPath, "asset");
            selected = selected.Replace(Application.dataPath, "Assets");

            if (selected == null) return;

            SteamVR_Skeleton_Pose newPose = (SteamVR_Skeleton_Pose)AssetDatabase.LoadAssetAtPath(selected, typeof(SteamVR_Skeleton_Pose));
            if (newPose == null)
            {
                EditorUtility.DisplayDialog("WARNING", "Asset could not be loaded. Is it not a SteamVR_Skeleton_Pose?", "ok");
                return;
            }
            DeepCopyPose(newPose, activePose);
        }


        void DeepCopyPose(SteamVR_Skeleton_Pose source, SteamVR_Skeleton_Pose dest)
        {
            int boneNum = SteamVR_Action_Skeleton.numBones;

            if (dest.rightHand.bonePositions == null) dest.rightHand.bonePositions = new Vector3[boneNum];
            if (dest.rightHand.boneRotations == null) dest.rightHand.boneRotations = new Quaternion[boneNum];

            if (dest.leftHand.bonePositions == null) dest.leftHand.bonePositions = new Vector3[boneNum];
            if (dest.leftHand.boneRotations == null) dest.leftHand.boneRotations = new Quaternion[boneNum];

            EditorUtility.SetDirty(dest);


            // RIGHT HAND COPY

            dest.rightHand.position = source.rightHand.position;
            dest.rightHand.rotation = source.rightHand.rotation;
            for (int boneIndex = 0; boneIndex < boneNum; boneIndex++)
            {
                dest.rightHand.bonePositions[boneIndex] = source.rightHand.bonePositions[boneIndex];
                dest.rightHand.boneRotations[boneIndex] = source.rightHand.boneRotations[boneIndex];
                EditorUtility.DisplayProgressBar("Copying...", "Copying right hand pose", (float)boneIndex / (float)boneNum / 2f);
            }
            dest.rightHand.thumbFingerMovementType = source.rightHand.thumbFingerMovementType;
            dest.rightHand.indexFingerMovementType = source.rightHand.indexFingerMovementType;
            dest.rightHand.middleFingerMovementType = source.rightHand.middleFingerMovementType;
            dest.rightHand.ringFingerMovementType = source.rightHand.ringFingerMovementType;
            dest.rightHand.pinkyFingerMovementType = source.rightHand.pinkyFingerMovementType;

            // LEFT HAND COPY

            dest.leftHand.position = source.leftHand.position;
            dest.leftHand.rotation = source.leftHand.rotation;
            for (int boneIndex = 0; boneIndex < boneNum; boneIndex++)
            {
                dest.leftHand.bonePositions[boneIndex] = source.leftHand.bonePositions[boneIndex];
                dest.leftHand.boneRotations[boneIndex] = source.leftHand.boneRotations[boneIndex];
                EditorUtility.DisplayProgressBar("Copying...", "Copying left hand pose", (float)boneIndex / (float)boneNum / 2f);
            }
            dest.leftHand.thumbFingerMovementType = source.leftHand.thumbFingerMovementType;
            dest.leftHand.indexFingerMovementType = source.leftHand.indexFingerMovementType;
            dest.leftHand.middleFingerMovementType = source.leftHand.middleFingerMovementType;
            dest.leftHand.ringFingerMovementType = source.leftHand.ringFingerMovementType;
            dest.leftHand.pinkyFingerMovementType = source.leftHand.pinkyFingerMovementType;

            EditorUtility.SetDirty(dest);

            forceUpdateHands = true;
            EditorUtility.ClearProgressBar();
        }

        int activePoseIndex = 0;
        SerializedProperty activePoseProp;
        SteamVR_Skeleton_Pose activePose;

        bool forceUpdateHands = false;

        public override void OnInspectorGUI()
        {


            serializedObject.Update();

            DrawPoseEditorMenu();

            DrawBlendingBehaviourMenu();


            serializedObject.ApplyModifiedProperties();
        }

        bool getRightFromOpposite = false;
        bool getLeftFromOpposite = false;

        SteamVR_Behaviour_Skeleton leftSkeleton = null;
        SteamVR_Behaviour_Skeleton rightSkeleton = null;

        void DrawPoseEditorMenu()
        {
            if (Application.isPlaying)
            {
                EditorGUILayout.LabelField("Cannot modify pose while in play mode.");
            }
            else
            {
                bool createNew = false;

                LoadDefaultPreviewHands();


                activePoseIndex = previewPoseSelection.intValue;
                if (activePoseIndex == 0)
                    activePoseProp = skeletonMainPoseProperty;
                else
                    activePoseProp = skeletonAdditionalPosesProperty.GetArrayElementAtIndex(activePoseIndex - 1);


                //box containing all pose editing controls
                GUILayout.BeginVertical("box");


                poseEditorExpanded.boolValue = IndentedFoldoutHeader(poseEditorExpanded.boolValue, "Pose Editor");


                if (poseEditorExpanded.boolValue)
                {
                    //show selectable menu of all poses, highlighting the one that is selected
                    EditorGUILayout.Space();


                    poser.poseNames = new string[skeletonAdditionalPosesProperty.arraySize + 1];

                    for (int i = 0; i < skeletonAdditionalPosesProperty.arraySize + 1; i++)
                    {
                        if (i == 0)
                            // main pose special case
                            poser.poseNames[i] = skeletonMainPoseProperty.objectReferenceValue == null ? "[not set]" : skeletonMainPoseProperty.objectReferenceValue.name + " (MAIN)";
                        else
                            // additional poses from array
                            poser.poseNames[i] = skeletonAdditionalPosesProperty.GetArrayElementAtIndex(i - 1).objectReferenceValue == null ? "[not set]" : skeletonAdditionalPosesProperty.GetArrayElementAtIndex(i - 1).objectReferenceValue.name;
                    }

                    EditorGUILayout.BeginHorizontal();
                    int poseSelected = GUILayout.Toolbar(activePoseIndex, poser.poseNames);

                    if (poseSelected != activePoseIndex)
                    {
                        forceUpdateHands = true;
                        activePoseIndex = poseSelected;
                        PoseChanged = true;
                        previewPoseSelection.intValue = activePoseIndex;
                        serializedObject.ApplyModifiedProperties();
                    }




                    EditorGUILayout.BeginVertical(GUILayout.MaxWidth(32));
                    if (GUILayout.Button("+", GUILayout.MaxWidth(32)))
                    {
                        skeletonAdditionalPosesProperty.InsertArrayElementAtIndex(skeletonAdditionalPosesProperty.arraySize);
                    }
                    //only allow deletion of additional poses
                    EditorGUI.BeginDisabledGroup(skeletonAdditionalPosesProperty.arraySize == 0 || activePoseIndex == 0);
                    if (GUILayout.Button("-", GUILayout.MaxWidth(32)) && skeletonAdditionalPosesProperty.arraySize > 0)
                    {
                        skeletonAdditionalPosesProperty.DeleteArrayElementAtIndex(activePoseIndex - 1);
                        skeletonAdditionalPosesProperty.DeleteArrayElementAtIndex(activePoseIndex - 1);
                        if (activePoseIndex >= skeletonAdditionalPosesProperty.arraySize + 1)
                        {
                            activePoseIndex = skeletonAdditionalPosesProperty.arraySize;
                            previewPoseSelection.intValue = activePoseIndex;
                            return;
                        }
                    }

                    EditorGUI.EndDisabledGroup();
                    EditorGUILayout.EndVertical();
                    GUILayout.FlexibleSpace();

                    EditorGUILayout.EndHorizontal();

                    GUILayout.BeginVertical("box");

                    // sides of pose editor
                    GUILayout.BeginHorizontal();

                    //pose controls
                    GUILayout.BeginVertical(GUILayout.MaxWidth(200));

                    GUILayout.Label("Current Pose:");

                    if (PoseChanged)
                    {
                        PoseChanged = false;
                        forceUpdateHands = true;

                        if (activePoseIndex == 0)
                            activePoseProp = skeletonMainPoseProperty;
                        else
                            activePoseProp = skeletonAdditionalPosesProperty.GetArrayElementAtIndex(activePoseIndex - 1);
                        activePose = (SteamVR_Skeleton_Pose)activePoseProp.objectReferenceValue;

                    }


                    activePose = (SteamVR_Skeleton_Pose)activePoseProp.objectReferenceValue;
                    if (activePoseProp.objectReferenceValue == null)
                    {
                        if (previewLeftInstanceProperty.objectReferenceValue != null)
                            DestroyImmediate(previewLeftInstanceProperty.objectReferenceValue);
                        if (previewRightInstanceProperty.objectReferenceValue != null)
                            DestroyImmediate(previewRightInstanceProperty.objectReferenceValue);

                        EditorGUILayout.BeginHorizontal();
                        activePoseProp.objectReferenceValue = EditorGUILayout.ObjectField(activePoseProp.objectReferenceValue, typeof(SteamVR_Skeleton_Pose), false);
                        if (GUILayout.Button("Create")) createNew = true;
                        EditorGUILayout.EndHorizontal();
                        if (createNew)
                        {
                            string fullPath = EditorUtility.SaveFilePanelInProject("Create New Skeleton Pose", "newPose", "asset", "Save file");

                            if (string.IsNullOrEmpty(fullPath) == false)
                            {
                                SteamVR_Skeleton_Pose newPose = ScriptableObject.CreateInstance<SteamVR_Skeleton_Pose>();
                                AssetDatabase.CreateAsset(newPose, fullPath);
                                AssetDatabase.SaveAssets();

                                activePoseProp.objectReferenceValue = newPose;
                                serializedObject.ApplyModifiedProperties();
                            }
                        }
                    }
                    else
                    {
                        activePoseProp.objectReferenceValue = EditorGUILayout.ObjectField(activePoseProp.objectReferenceValue, typeof(SteamVR_Skeleton_Pose), false);

                        DrawPoseControlButtons();

                        UpdatePreviewHand(previewLeftInstanceProperty, showLeftPreviewProperty, SteamVR_Settings.instance.previewHandLeft, activePose.leftHand, activePose, forceUpdateHands);
                        UpdatePreviewHand(previewRightInstanceProperty, showRightPreviewProperty, SteamVR_Settings.instance.previewHandRight, activePose.rightHand, activePose, forceUpdateHands);

                        forceUpdateHands = false;

                        GUILayout.EndVertical();




                        GUILayout.Space(10);

                        if (handTexL == null)
                            handTexL = (Texture)EditorGUIUtility.Load("Assets/SteamVR/Input/Editor/Resources/Icons/HandLeftIcon.png");
                        if (handTexR == null)
                            handTexR = (Texture)EditorGUIUtility.Load("Assets/SteamVR/Input/Editor/Resources/Icons/HandRightIcon.png");


                        //Left Hand

                        GUILayout.Space(32);
                        EditorGUILayout.BeginVertical();
                        EditorGUILayout.BeginVertical("box");
                        EditorGUILayout.BeginHorizontal();
                        GUI.color = new Color(1, 1, 1, showLeftPreviewProperty.boolValue ? 1 : 0.25f);
                        if (GUILayout.Button(handTexL, GUI.skin.label, GUILayout.Width(64), GUILayout.Height(64)))
                        {
                            showLeftPreviewProperty.boolValue = !showLeftPreviewProperty.boolValue;
                            //forceUpdateHands = true;
                        }
                        GUI.color = Color.white;

                        EditorGUIUtility.labelWidth = 48;
                        EditorGUILayout.LabelField("Left Hand", EditorStyles.boldLabel);
                        EditorGUIUtility.labelWidth = 0;
                        GUILayout.FlexibleSpace();
                        EditorGUILayout.EndHorizontal();

                        bool showLeft = showLeftPreviewProperty.boolValue;


                        DrawHand(showLeft, activePose.leftHand, activePose.rightHand, getLeftFromOpposite, showLeftPreviewProperty);
                        EditorGUILayout.EndVertical();
                        EditorGUI.BeginDisabledGroup((showLeftPreviewProperty.boolValue && showRightPreviewProperty.boolValue) == false);
                        getRightFromOpposite = GUILayout.Button("Copy Left pose to Right hand");
                        EditorGUI.EndDisabledGroup();
                        EditorGUILayout.EndVertical();



                        EditorGUILayout.BeginVertical();
                        EditorGUILayout.BeginVertical("box");

                        EditorGUILayout.BeginHorizontal();
                        GUILayout.FlexibleSpace();
                        EditorGUIUtility.labelWidth = 48;
                        EditorGUILayout.LabelField("Right Hand", EditorStyles.boldLabel);
                        EditorGUIUtility.labelWidth = 0;
                        GUI.color = new Color(1, 1, 1, showRightPreviewProperty.boolValue ? 1 : 0.25f);
                        if (GUILayout.Button(handTexR, GUI.skin.label, GUILayout.Width(64), GUILayout.Height(64)))
                        {
                            showRightPreviewProperty.boolValue = !showRightPreviewProperty.boolValue;
                            //forceUpdateHands = true;
                        }
                        GUI.color = Color.white;
                        EditorGUILayout.EndHorizontal();

                        bool showRight = showLeftPreviewProperty.boolValue;

                        DrawHand(showRight, activePose.rightHand, activePose.leftHand, getRightFromOpposite, showRightPreviewProperty);
                        EditorGUILayout.EndVertical();
                        EditorGUI.BeginDisabledGroup((showLeftPreviewProperty.boolValue && showRightPreviewProperty.boolValue) == false);
                        getLeftFromOpposite = GUILayout.Button("Copy Right pose to Left hand");
                        EditorGUI.EndDisabledGroup();

                    }







                    /*




                    if (activePoseProp.objectReferenceValue == null)
                    {
                        EditorGUILayout.BeginHorizontal();
                        EditorGUILayout.PropertyField(activePoseProp);
                        createNew = GUILayout.Button("Create");
                        EditorGUILayout.EndHorizontal();
                    }
                    else
                    {
                        EditorGUILayout.PropertyField(activePoseProp);

                        DrawDivider();


                        DrawSaveButtons();

                        if (PoseChanged)
                        {
                            PoseChanged = false;
                            forceUpdateHands = true;
                        }

                        UpdatePreviewHand(previewLeftInstanceProperty, showLeftPreviewProperty, previewLeftHandPrefab, activePose.leftHand, forceUpdateHands);
                        UpdatePreviewHand(previewRightInstanceProperty, showRightPreviewProperty, previewRightHandPrefab, activePose.rightHand, forceUpdateHands);

                    }

                                activePoseProp.objectReferenceValue = newPose;
                                serializedObject.ApplyModifiedProperties();
                            }
                        }
                    */
                    GUILayout.EndVertical();
                    EditorGUILayout.EndVertical();
                    GUILayout.EndHorizontal();


                    EditorGUI.BeginChangeCheck();
                    EditorGUILayout.BeginHorizontal();
                    EditorGUIUtility.labelWidth = 120;
                    poserScale.floatValue = EditorGUILayout.FloatField("Preview Pose Scale", poserScale.floatValue);
                    if (poserScale.floatValue <= 0) poserScale.floatValue = 1;
                    EditorGUIUtility.labelWidth = 0;
                    GUILayout.FlexibleSpace();
                    EditorGUILayout.EndHorizontal();
                    if (EditorGUI.EndChangeCheck())
                    {
                        forceUpdateHands = true;
                    }
                }

                GUILayout.EndVertical();
            }
        }


        bool SelectablePoseButton(string name, bool selected)
        {
            if (selected)
            {
                GUI.color = new Color(0.7f, 0.73f, 0.8f);
                GUILayout.Button(name, GUILayout.ExpandWidth(false));
                GUI.color = Color.white;

                return false;
            }
            else
            {
                return GUILayout.Button(name, GUILayout.ExpandWidth(false));
            }
        }

        Texture[] handMaskTextures;

        void DrawBlendingBehaviourMenu()
        {
            if (handMaskTextures == null)
            {
                handMaskTextures = new Texture[] { (Texture)EditorGUIUtility.Load("Assets/SteamVR/Input/Editor/Resources/Icons/handmask_Palm.png"),
                (Texture)EditorGUIUtility.Load("Assets/SteamVR/Input/Editor/Resources/Icons/handmask_Thumb.png"),
                (Texture)EditorGUIUtility.Load("Assets/SteamVR/Input/Editor/Resources/Icons/handmask_Index.png"),
                (Texture)EditorGUIUtility.Load("Assets/SteamVR/Input/Editor/Resources/Icons/handmask_Middle.png"),
                (Texture)EditorGUIUtility.Load("Assets/SteamVR/Input/Editor/Resources/Icons/handmask_Ring.png"),
                (Texture)EditorGUIUtility.Load("Assets/SteamVR/Input/Editor/Resources/Icons/handmask_Pinky.png")
                };
            }

            GUILayout.Space(10);
            GUILayout.BeginVertical("box");

            blendEditorExpanded.boolValue = IndentedFoldoutHeader(blendEditorExpanded.boolValue, "Blending Editor");

            if (blendEditorExpanded.boolValue)
            {
                //show selectable menu of all poses, highlighting the one that is selected
                EditorGUILayout.Space();
                for (int i = 0; i < blendingBehaviourArray.arraySize; i++)
                {

                    SerializedProperty blender = blendingBehaviourArray.GetArrayElementAtIndex(i);
                    SerializedProperty blenderName = blender.FindPropertyRelative("name");
                    SerializedProperty blenderEnabled = blender.FindPropertyRelative("enabled");
                    SerializedProperty blenderInfluence = blender.FindPropertyRelative("influence");
                    SerializedProperty blenderPose = blender.FindPropertyRelative("pose");
                    SerializedProperty blenderType = blender.FindPropertyRelative("type");
                    SerializedProperty blenderUseMask = blender.FindPropertyRelative("useMask");
                    SerializedProperty blenderValue = blender.FindPropertyRelative("value");
                    SerializedProperty blenderMask = blender.FindPropertyRelative("mask").FindPropertyRelative("values");

                    SerializedProperty blenderPreview = blender.FindPropertyRelative("previewEnabled");

                    GUILayout.Space(10);
                    float bright = blenderEnabled.boolValue ? 0.6f : 0.9f; // grey out box when disabled
                    if (EditorGUIUtility.isProSkin) bright = 1;
                    GUI.color = new Color(bright, bright, bright);
                    GUILayout.BeginVertical("box");
                    GUI.color = Color.white;

                    blenderPreview.boolValue = IndentedFoldoutHeader(blenderPreview.boolValue, blenderName.stringValue, 1);

                    //SerializedProperty blenderValue = blender.FindProperty("value");

                    EditorGUIUtility.labelWidth = 64;

                    EditorGUILayout.BeginHorizontal();
                    DrawBlenderLogo(blenderType);
                    EditorGUILayout.PropertyField(blenderEnabled);
                    GUILayout.FlexibleSpace();

                    EditorGUI.BeginDisabledGroup(i == 0);
                    if (GUILayout.Button("Move Up"))
                    {
                        blendingBehaviourArray.MoveArrayElement(i, i - 1);
                    }
                    EditorGUI.EndDisabledGroup();

                    EditorGUI.BeginDisabledGroup(i == blendingBehaviourArray.arraySize - 1);
                    if (GUILayout.Button("Move Down"))
                    {
                        blendingBehaviourArray.MoveArrayElement(i, i + 1);
                    }
                    EditorGUI.EndDisabledGroup();

                    GUILayout.Space(6);
                    GUI.color = new Color(0.9f, 0.8f, 0.78f);
                    if (GUILayout.Button("Delete"))
                    {
                        if (EditorUtility.DisplayDialog("", "Do you really want to delete this Blend Behaviour?", "Yes", "Cancel"))
                        {
                            blendingBehaviourArray.DeleteArrayElementAtIndex(i);
                            return;
                        }
                    }
                    GUI.color = Color.white;
                    EditorGUILayout.EndHorizontal();

                    if (blenderPreview.boolValue)
                    {

                        EditorGUILayout.PropertyField(blenderName);



                        EditorGUILayout.BeginHorizontal();


                        //EditorGUILayout.BeginVertical();


                        EditorGUILayout.BeginVertical();

                        EditorGUILayout.Slider(blenderInfluence, 0, 1);

                        blenderPose.intValue = EditorGUILayout.Popup("Pose", blenderPose.intValue, poser.poseNames);

                        GUILayout.Space(20);

                        EditorGUILayout.PropertyField(blenderType);

                        if (Application.isPlaying)
                        {
                            GUILayout.Space(10);
                            GUI.color = new Color(0, 0, 0, 0.3f);
                            EditorGUILayout.LabelField("", GUI.skin.box, GUILayout.Height(20), GUILayout.ExpandWidth(true));
                            GUI.color = Color.white;
                            Rect fillRect = GUILayoutUtility.GetLastRect();
                            EditorGUI.DrawRect(fillRectHorizontal(fillRect, blenderValue.floatValue), Color.green);
                        }

                        EditorGUILayout.EndVertical();



                        EditorGUILayout.BeginVertical(GUILayout.MaxWidth(100));
                        EditorGUILayout.PropertyField(blenderUseMask);
                        if (blenderUseMask.boolValue)
                        {
                            DrawMaskEnabled(blenderMask);
                        }
                        else
                        {
                            DrawMaskDisabled(blenderMask);
                        }
                        EditorGUILayout.EndVertical();

                        EditorGUILayout.EndHorizontal();



                        DrawDivider();

                        EditorGUIUtility.labelWidth = 0;


                        if (blenderType.intValue == (int)SteamVR_Skeleton_Poser.PoseBlendingBehaviour.BlenderTypes.Manual)
                        {
                            EditorGUILayout.Slider(blenderValue, 0, 1);
                        }
                        if (blenderType.intValue == (int)SteamVR_Skeleton_Poser.PoseBlendingBehaviour.BlenderTypes.AnalogAction)
                        {
                            SerializedProperty blenderAction = blender.FindPropertyRelative("action_single");
                            SerializedProperty blenderSmooth = blender.FindPropertyRelative("smoothingSpeed");
                            EditorGUILayout.PropertyField(blenderAction);
                            EditorGUILayout.PropertyField(blenderSmooth);
                        }
                        if (blenderType.intValue == (int)SteamVR_Skeleton_Poser.PoseBlendingBehaviour.BlenderTypes.BooleanAction)
                        {
                            SerializedProperty blenderAction = blender.FindPropertyRelative("action_bool");
                            SerializedProperty blenderSmooth = blender.FindPropertyRelative("smoothingSpeed");
                            EditorGUILayout.PropertyField(blenderAction);
                            EditorGUILayout.PropertyField(blenderSmooth);
                        }
                    }

                    GUILayout.EndVertical();

                }


                EditorGUILayout.BeginHorizontal();
                if (GUILayout.Button("+", GUILayout.MaxWidth(32)))
                {
                    int i = blendingBehaviourArray.arraySize;
                    blendingBehaviourArray.InsertArrayElementAtIndex(i);
                    blendingBehaviourArray.GetArrayElementAtIndex(i).FindPropertyRelative("name").stringValue = "New Behaviour";
                    blendingBehaviourArray.GetArrayElementAtIndex(i).FindPropertyRelative("enabled").boolValue = true;
                    blendingBehaviourArray.GetArrayElementAtIndex(i).FindPropertyRelative("influence").floatValue = 1;
                    blendingBehaviourArray.GetArrayElementAtIndex(i).FindPropertyRelative("previewEnabled").boolValue = true;
                    serializedObject.ApplyModifiedProperties();
                    poser.blendingBehaviours[i].mask.Reset();
                }
                GUILayout.FlexibleSpace();

                EditorGUILayout.EndHorizontal();

            }
            GUILayout.EndVertical();

        }

        Rect fillRectHorizontal(Rect r, float f)
        {
            r.xMax--;
            r.yMax--;
            r.xMin++;
            r.yMin++;
            r.width *= f;
            return r;
        }

        void DrawBlenderLogo(SerializedProperty blenderType)
        {
            Texture icon = null;
            if (blenderType.intValue == (int)SteamVR_Skeleton_Poser.PoseBlendingBehaviour.BlenderTypes.Manual)
            {
                icon = (Texture)EditorGUIUtility.Load("Assets/SteamVR/Input/Editor/Resources/Icons/BlenderBehaviour_Manual_Icon.png");
            }
            if (blenderType.intValue == (int)SteamVR_Skeleton_Poser.PoseBlendingBehaviour.BlenderTypes.AnalogAction)
            {
                icon = (Texture)EditorGUIUtility.Load("Assets/SteamVR/Input/Editor/Resources/Icons/BlenderBehaviour_Analog_Icon.png");
            }
            if (blenderType.intValue == (int)SteamVR_Skeleton_Poser.PoseBlendingBehaviour.BlenderTypes.BooleanAction)
            {
                icon = (Texture)EditorGUIUtility.Load("Assets/SteamVR/Input/Editor/Resources/Icons/BlenderBehaviour_Boolean_Icon.png");
            }

            GUILayout.Label(icon, GUILayout.MaxHeight(32), GUILayout.MaxWidth(32));
        }

        Color maskColorEnabled = new Color(0.3f, 1.0f, 0.3f, 1.0f);
        Color maskColorDisabled = new Color(0, 0, 0, 0.5f);
        Color maskColorUnused = new Color(0.3f, 0.7f, 0.3f, 0.3f);

        void DrawMaskDisabled(SerializedProperty mask)
        {
            Texture m = (Texture)EditorGUIUtility.Load("Assets/SteamVR/Input/Editor/Resources/Icons/handmask.png");
            GUI.color = maskColorUnused;
            GUILayout.Label(m, GUILayout.MaxHeight(100), GUILayout.MaxWidth(100));
            GUI.color = Color.white;
        }

        void DrawMaskEnabled(SerializedProperty mask)
        {
            GUILayout.Label("", GUILayout.Height(100), GUILayout.Width(100));
            Rect maskRect = GUILayoutUtility.GetLastRect();
            for (int i = 0; i < 6; i++)
            {
                GUI.color = mask.GetArrayElementAtIndex(i).boolValue ? maskColorEnabled : maskColorDisabled;
                GUI.Label(maskRect, handMaskTextures[i]);
                GUI.color = new Color(0, 0, 0, 0.0f);
                if (GUI.Button(GetFingerAreaRect(maskRect, i), ""))
                {
                    mask.GetArrayElementAtIndex(i).boolValue = !mask.GetArrayElementAtIndex(i).boolValue;
                }
                GUI.color = Color.white;
                //maskVal
            }
        }

        /// <summary>
        /// Defines area of mask icon to be buttons for each finger
        /// </summary>
        Rect GetFingerAreaRect(Rect source, int i)
        {
            Rect outRect = source;
            if (i == 0)
            {
                outRect.xMin = Mathf.Lerp(source.xMin, source.xMax, 0.4f); // left edge
                outRect.xMax = Mathf.Lerp(source.xMin, source.xMax, 0.8f); // right edge

                outRect.yMin = Mathf.Lerp(source.yMin, source.yMax, 0.5f); // top edge
                outRect.yMax = Mathf.Lerp(source.yMin, source.yMax, 1.0f); // bottom edge
            }
            if (i == 1)
            {
                outRect.xMin = Mathf.Lerp(source.xMin, source.xMax, 0.0f); // left edge
                outRect.xMax = Mathf.Lerp(source.xMin, source.xMax, 0.4f); // right edge

                outRect.yMin = Mathf.Lerp(source.yMin, source.yMax, 0.5f); // top edge
                outRect.yMax = Mathf.Lerp(source.yMin, source.yMax, 1.0f); // bottom edge
            }
            if (i == 2)
            {
                outRect.xMin = Mathf.Lerp(source.xMin, source.xMax, 0.3f); // left edge
                outRect.xMax = Mathf.Lerp(source.xMin, source.xMax, 0.425f); // right edge

                outRect.yMin = Mathf.Lerp(source.yMin, source.yMax, 0.0f); // top edge
                outRect.yMax = Mathf.Lerp(source.yMin, source.yMax, 0.5f); // bottom edge
            }
            if (i == 3)
            {
                outRect.xMin = Mathf.Lerp(source.xMin, source.xMax, 0.425f); // left edge
                outRect.xMax = Mathf.Lerp(source.xMin, source.xMax, 0.55f); // right edge

                outRect.yMin = Mathf.Lerp(source.yMin, source.yMax, 0.0f); // top edge
                outRect.yMax = Mathf.Lerp(source.yMin, source.yMax, 0.5f); // bottom edge
            }
            if (i == 4)
            {
                outRect.xMin = Mathf.Lerp(source.xMin, source.xMax, 0.55f); // left edge
                outRect.xMax = Mathf.Lerp(source.xMin, source.xMax, 0.675f); // right edge

                outRect.yMin = Mathf.Lerp(source.yMin, source.yMax, 0.0f); // top edge
                outRect.yMax = Mathf.Lerp(source.yMin, source.yMax, 0.5f); // bottom edge
            }
            if (i == 5)
            {
                outRect.xMin = Mathf.Lerp(source.xMin, source.xMax, 0.675f); // left edge
                outRect.xMax = Mathf.Lerp(source.xMin, source.xMax, 0.8f); // right edge

                outRect.yMin = Mathf.Lerp(source.yMin, source.yMax, 0.0f); // top edge
                outRect.yMax = Mathf.Lerp(source.yMin, source.yMax, 0.5f); // bottom edge
            }
            return outRect;
        }



        void DrawDivider()
        {
            GUI.color = new Color(0, 0, 0, 0.6f);
            EditorGUILayout.Space();
            EditorGUILayout.LabelField("", GUI.skin.horizontalSlider);
            EditorGUILayout.Space();
            GUI.color = Color.white;
        }

        bool IndentedFoldoutHeader(bool fold, string text, int indent = 1)
        {
            GUILayout.BeginHorizontal();
            GUIStyle boldFoldoutStyle = new GUIStyle(EditorStyles.foldout);
            boldFoldoutStyle.fontStyle = FontStyle.Bold;
            GUILayout.Space(14f * indent);
            fold = EditorGUILayout.Foldout(fold, text, boldFoldoutStyle);
            GUILayout.EndHorizontal();
            return fold;
        }
    }
}
