// ----------------------------------------------------------------------------
// <copyright file="PhotonTransformViewClassicEditor.cs" company="Exit Games GmbH">
//   PhotonNetwork Framework for Unity - Copyright (C) 2018 Exit Games GmbH
// </copyright>
// <summary>
//   This is a custom editor for the TransformView component.
// </summary>
// <author>developer@exitgames.com</author>
// ----------------------------------------------------------------------------


namespace Photon.Pun
{
    using UnityEditor;
    using UnityEngine;


    [CustomEditor(typeof(PhotonTransformViewClassic))]
    public class PhotonTransformViewClassicEditor : MonoBehaviourPunEditor
    {
        //private PhotonTransformViewClassic m_Target;

        private SerializedProperty m_SynchronizePositionProperty;
        private SerializedProperty m_SynchronizeRotationProperty;
        private SerializedProperty m_SynchronizeScaleProperty;

        private bool m_InterpolateHelpOpen;
        private bool m_ExtrapolateHelpOpen;
        private bool m_InterpolateRotationHelpOpen;
        private bool m_InterpolateScaleHelpOpen;

        private const int EDITOR_LINE_HEIGHT = 20;

        private const string INTERPOLATE_TOOLTIP =
            "Choose between synchronizing the value directly (by disabling interpolation) or smoothly move it towards the newest update.";

        private const string INTERPOLATE_HELP =
            "You can use interpolation to smoothly move your GameObject towards a new position that is received via the network. "
            + "This helps to reduce the stuttering movement that results because the network updates only arrive 10 times per second.\n"
            + "As a side effect, the GameObject is always lagging behind the actual position a little bit. This can be addressed with extrapolation.";

        private const string EXTRAPOLATE_TOOLTIP = "Extrapolation is used to predict where the GameObject actually is";

        private const string EXTRAPOLATE_HELP =
            "Whenever you deal with network values, all values you receive will be a little bit out of date since that data needs "
            + "to reach you first. You can use extrapolation to try to predict where the player actually is, based on the movement data you have received.\n"
            +
            "This has to be tweaked carefully for each specific game in order to insure the optimal prediction. Sometimes it is very easy to extrapolate states, because "
            +
            "the GameObject behaves very predictable (for example for vehicles). Other times it can be very hard because the user input is translated directly to the game "
            + "and you cannot really predict what the user is going to do (for example in fighting games)";

        private const string INTERPOLATE_HELP_URL = "https://doc.photonengine.com/en-us/pun/current/demos-and-tutorials/package-demos/rpg-movement#interpolate_options";
        private const string EXTRAPOLATE_HELP_URL = "https://doc.photonengine.com/en-us/pun/current/demos-and-tutorials/package-demos/rpg-movement#extrapolate_options";

        public void OnEnable()
        {
            SetupSerializedProperties();
        }

        public override void OnInspectorGUI()
        {
            serializedObject.Update();

            base.OnInspectorGUI();

            //this.m_Target = (PhotonTransformViewClassic) target;

            DrawIsPlayingWarning();
            GUI.enabled = !Application.isPlaying;

            DrawSynchronizePositionHeader();
            DrawSynchronizePositionData();

            GUI.enabled = !Application.isPlaying;
            DrawSynchronizeRotationHeader();
            DrawSynchronizeRotationData();

            GUI.enabled = !Application.isPlaying;
            DrawSynchronizeScaleHeader();
            DrawSynchronizeScaleData();

            serializedObject.ApplyModifiedProperties();

            GUI.enabled = true;
        }

        private void DrawIsPlayingWarning()
        {
            if (Application.isPlaying == false)
            {
                return;
            }

            GUILayout.BeginVertical(GUI.skin.box);
            {
                GUILayout.Label("Editing is disabled in play mode so the two objects don't go out of sync");
            }
            GUILayout.EndVertical();
        }

        private void SetupSerializedProperties()
        {
            this.m_SynchronizePositionProperty = serializedObject.FindProperty("m_PositionModel.SynchronizeEnabled");
            this.m_SynchronizeRotationProperty = serializedObject.FindProperty("m_RotationModel.SynchronizeEnabled");
            this.m_SynchronizeScaleProperty = serializedObject.FindProperty("m_ScaleModel.SynchronizeEnabled");
        }

        private void DrawSynchronizePositionHeader()
        {
            DrawHeader("Synchronize Position", this.m_SynchronizePositionProperty);
        }

        private void DrawSynchronizePositionData()
        {
            if (this.m_SynchronizePositionProperty == null || this.m_SynchronizePositionProperty.boolValue == false)
            {
                return;
            }

            SerializedProperty interpolatePositionProperty = serializedObject.FindProperty("m_PositionModel.InterpolateOption");
            PhotonTransformViewPositionModel.InterpolateOptions interpolateOption = (PhotonTransformViewPositionModel.InterpolateOptions)interpolatePositionProperty.enumValueIndex;

            SerializedProperty extrapolatePositionProperty = serializedObject.FindProperty("m_PositionModel.ExtrapolateOption");
            PhotonTransformViewPositionModel.ExtrapolateOptions extrapolateOption = (PhotonTransformViewPositionModel.ExtrapolateOptions)extrapolatePositionProperty.enumValueIndex;

            float containerHeight = 155;

            switch (interpolateOption)
            {
                case PhotonTransformViewPositionModel.InterpolateOptions.FixedSpeed:
                case PhotonTransformViewPositionModel.InterpolateOptions.Lerp:
                    containerHeight += EDITOR_LINE_HEIGHT;
                    break;
                /*case PhotonTransformViewPositionModel.InterpolateOptions.MoveTowardsComplex:
                    containerHeight += EDITOR_LINE_HEIGHT*3;
                    break;*/
            }

            if (extrapolateOption != PhotonTransformViewPositionModel.ExtrapolateOptions.Disabled)
            {
                containerHeight += EDITOR_LINE_HEIGHT;
            }

            switch (extrapolateOption)
            {
                case PhotonTransformViewPositionModel.ExtrapolateOptions.FixedSpeed:
                    containerHeight += EDITOR_LINE_HEIGHT;
                    break;
            }

            if (this.m_InterpolateHelpOpen == true)
            {
                containerHeight += GetInterpolateHelpBoxHeight();
            }

            if (this.m_ExtrapolateHelpOpen == true)
            {
                containerHeight += GetExtrapolateHelpBoxHeight();
            }

            // removed Gizmo Options. -3 lines, -1 splitter
            containerHeight -= EDITOR_LINE_HEIGHT * 3;

            Rect rect = PhotonGUI.ContainerBody(containerHeight);

            Rect propertyRect = new Rect(rect.xMin + 5, rect.yMin + 2, rect.width - 10, EditorGUIUtility.singleLineHeight);

            DrawTeleport(ref propertyRect);
            DrawSplitter(ref propertyRect);

            DrawSynchronizePositionDataInterpolation(ref propertyRect, interpolatePositionProperty, interpolateOption);
            DrawSplitter(ref propertyRect);

            DrawSynchronizePositionDataExtrapolation(ref propertyRect, extrapolatePositionProperty, extrapolateOption);
        }

        private float GetInterpolateHelpBoxHeight()
        {
            return PhotonGUI.RichLabel.CalcHeight(new GUIContent(INTERPOLATE_HELP), Screen.width - 54) + 35;
        }

        private float GetExtrapolateHelpBoxHeight()
        {
            return PhotonGUI.RichLabel.CalcHeight(new GUIContent(EXTRAPOLATE_HELP), Screen.width - 54) + 35;
        }

        private void DrawSplitter(ref Rect propertyRect)
        {
            Rect splitterRect = new Rect(propertyRect.xMin - 3, propertyRect.yMin, propertyRect.width + 6, 1);
            PhotonGUI.DrawSplitter(splitterRect);

            propertyRect.y += 5;
        }

        private void DrawHelpBox(ref Rect propertyRect, bool isOpen, float height, string helpText, string url)
        {
            if (isOpen == true)
            {
                Rect helpRect = new Rect(propertyRect.xMin, propertyRect.yMin, propertyRect.width, height - 5);
                GUI.BeginGroup(helpRect, GUI.skin.box);
                GUI.Label(new Rect(5, 5, propertyRect.width - 10, height - 30), helpText, PhotonGUI.RichLabel);
                if (GUI.Button(new Rect(5, height - 30, propertyRect.width - 10, 20), "Read more in our documentation"))
                {
                    Application.OpenURL(url);
                }

                GUI.EndGroup();

                propertyRect.y += height;
            }
        }

        private void DrawPropertyWithHelpIcon(ref Rect propertyRect, ref bool isHelpOpen, SerializedProperty property, string tooltip)
        {
            Rect propertyFieldRect = new Rect(propertyRect.xMin, propertyRect.yMin, propertyRect.width - 20, propertyRect.height);
            string propertyName = ObjectNames.NicifyVariableName(property.name);
            EditorGUI.PropertyField(propertyFieldRect, property, new GUIContent(propertyName, tooltip));

            Rect helpIconRect = new Rect(propertyFieldRect.xMax + 5, propertyFieldRect.yMin, 20, propertyFieldRect.height);
            isHelpOpen = GUI.Toggle(helpIconRect, isHelpOpen, PhotonGUI.HelpIcon, GUIStyle.none);

            propertyRect.y += EDITOR_LINE_HEIGHT;
        }

        private void DrawSynchronizePositionDataExtrapolation(ref Rect propertyRect, SerializedProperty extrapolatePositionProperty,
                                                              PhotonTransformViewPositionModel.ExtrapolateOptions extrapolateOption)
        {
            DrawPropertyWithHelpIcon(ref propertyRect, ref this.m_ExtrapolateHelpOpen, extrapolatePositionProperty, EXTRAPOLATE_TOOLTIP);
            DrawHelpBox(ref propertyRect, this.m_ExtrapolateHelpOpen, GetExtrapolateHelpBoxHeight(), EXTRAPOLATE_HELP, EXTRAPOLATE_HELP_URL);

            if (extrapolateOption != PhotonTransformViewPositionModel.ExtrapolateOptions.Disabled)
            {
                EditorGUI.PropertyField(propertyRect, serializedObject.FindProperty("m_PositionModel.ExtrapolateIncludingRoundTripTime"));
                propertyRect.y += EDITOR_LINE_HEIGHT;
            }

            switch (extrapolateOption)
            {
                case PhotonTransformViewPositionModel.ExtrapolateOptions.FixedSpeed:
                    EditorGUI.PropertyField(propertyRect, serializedObject.FindProperty("m_PositionModel.ExtrapolateSpeed"));
                    propertyRect.y += EDITOR_LINE_HEIGHT;
                    break;
            }
        }

        private void DrawTeleport(ref Rect propertyRect)
        {
            EditorGUI.PropertyField(propertyRect, serializedObject.FindProperty("m_PositionModel.TeleportEnabled"),
                                    new GUIContent("Enable teleport for great distances"));
            propertyRect.y += EDITOR_LINE_HEIGHT;

            EditorGUI.PropertyField(propertyRect, serializedObject.FindProperty("m_PositionModel.TeleportIfDistanceGreaterThan"),
                                    new GUIContent("Teleport if distance greater than"));
            propertyRect.y += EDITOR_LINE_HEIGHT;
        }

        private void DrawSynchronizePositionDataInterpolation(ref Rect propertyRect, SerializedProperty interpolatePositionProperty,
                                                              PhotonTransformViewPositionModel.InterpolateOptions interpolateOption)
        {
            DrawPropertyWithHelpIcon(ref propertyRect, ref this.m_InterpolateHelpOpen, interpolatePositionProperty, INTERPOLATE_TOOLTIP);
            DrawHelpBox(ref propertyRect, this.m_InterpolateHelpOpen, GetInterpolateHelpBoxHeight(), INTERPOLATE_HELP, INTERPOLATE_HELP_URL);

            switch (interpolateOption)
            {
                case PhotonTransformViewPositionModel.InterpolateOptions.FixedSpeed:
                    EditorGUI.PropertyField(propertyRect, serializedObject.FindProperty("m_PositionModel.InterpolateMoveTowardsSpeed"),
                                            new GUIContent("MoveTowards Speed"));
                    propertyRect.y += EDITOR_LINE_HEIGHT;
                    break;

                case PhotonTransformViewPositionModel.InterpolateOptions.Lerp:
                    EditorGUI.PropertyField(propertyRect, serializedObject.FindProperty("m_PositionModel.InterpolateLerpSpeed"), new GUIContent("Lerp Speed"));
                    propertyRect.y += EDITOR_LINE_HEIGHT;
                    break;

                /*case PhotonTransformViewPositionModel.InterpolateOptions.MoveTowardsComplex:
                    Rect curveRect = new Rect(propertyRect.xMin, propertyRect.yMin, propertyRect.width - 100, propertyRect.height);
                    EditorGUI.PropertyField(curveRect, serializedObject.FindProperty("m_PositionModel.InterpolateSpeedCurve"), new GUIContent("MoveTowards Speed Curve"));
    
                    Rect labelRect = new Rect(propertyRect.xMax - 95, propertyRect.yMin, 10, propertyRect.height);
                    GUI.Label(labelRect, "x");
    
                    Rect multiplierRect = new Rect(propertyRect.xMax - 80, propertyRect.yMin, 80, propertyRect.height);
                    EditorGUI.PropertyField(multiplierRect, serializedObject.FindProperty("m_PositionModel.InterpolateMoveTowardsSpeed"), GUIContent.none);
                    propertyRect.y += EDITOR_LINE_HEIGHT;
    
                    EditorGUI.PropertyField(propertyRect, serializedObject.FindProperty("m_PositionModel.InterpolateMoveTowardsAcceleration"),
                        new GUIContent("Acceleration"));
                    propertyRect.y += EDITOR_LINE_HEIGHT;
    
                    EditorGUI.PropertyField(propertyRect, serializedObject.FindProperty("m_PositionModel.InterpolateMoveTowardsDeceleration"),
                        new GUIContent("Deceleration"));
                    propertyRect.y += EDITOR_LINE_HEIGHT;
                    break;*/
            }
        }

        private void DrawSynchronizeRotationHeader()
        {
            DrawHeader("Synchronize Rotation", this.m_SynchronizeRotationProperty);
        }

        private void DrawSynchronizeRotationData()
        {
            if (this.m_SynchronizeRotationProperty == null || this.m_SynchronizeRotationProperty.boolValue == false)
            {
                return;
            }

            SerializedProperty interpolateRotationProperty = serializedObject.FindProperty("m_RotationModel.InterpolateOption");
            PhotonTransformViewRotationModel.InterpolateOptions interpolateOption =
                (PhotonTransformViewRotationModel.InterpolateOptions)interpolateRotationProperty.enumValueIndex;

            float containerHeight = 20;

            switch (interpolateOption)
            {
                case PhotonTransformViewRotationModel.InterpolateOptions.RotateTowards:
                case PhotonTransformViewRotationModel.InterpolateOptions.Lerp:
                    containerHeight += EDITOR_LINE_HEIGHT;
                    break;
            }

            if (this.m_InterpolateRotationHelpOpen == true)
            {
                containerHeight += GetInterpolateHelpBoxHeight();
            }

            Rect rect = PhotonGUI.ContainerBody(containerHeight);
            Rect propertyRect = new Rect(rect.xMin + 5, rect.yMin + 2, rect.width - 10, EditorGUIUtility.singleLineHeight);

            DrawPropertyWithHelpIcon(ref propertyRect, ref this.m_InterpolateRotationHelpOpen, interpolateRotationProperty, INTERPOLATE_TOOLTIP);
            DrawHelpBox(ref propertyRect, this.m_InterpolateRotationHelpOpen, GetInterpolateHelpBoxHeight(), INTERPOLATE_HELP, INTERPOLATE_HELP_URL);

            switch (interpolateOption)
            {
                case PhotonTransformViewRotationModel.InterpolateOptions.RotateTowards:
                    EditorGUI.PropertyField(propertyRect, serializedObject.FindProperty("m_RotationModel.InterpolateRotateTowardsSpeed"),
                                            new GUIContent("RotateTowards Speed"));
                    break;
                case PhotonTransformViewRotationModel.InterpolateOptions.Lerp:
                    EditorGUI.PropertyField(propertyRect, serializedObject.FindProperty("m_RotationModel.InterpolateLerpSpeed"), new GUIContent("Lerp Speed"));
                    break;
            }
        }

        private void DrawSynchronizeScaleHeader()
        {
            DrawHeader("Synchronize Scale", this.m_SynchronizeScaleProperty);
        }

        private void DrawSynchronizeScaleData()
        {
            if (this.m_SynchronizeScaleProperty == null || this.m_SynchronizeScaleProperty.boolValue == false)
            {
                return;
            }

            SerializedProperty interpolateScaleProperty = serializedObject.FindProperty("m_ScaleModel.InterpolateOption");
            PhotonTransformViewScaleModel.InterpolateOptions interpolateOption = (PhotonTransformViewScaleModel.InterpolateOptions)interpolateScaleProperty.enumValueIndex;

            float containerHeight = EDITOR_LINE_HEIGHT;

            switch (interpolateOption)
            {
                case PhotonTransformViewScaleModel.InterpolateOptions.MoveTowards:
                case PhotonTransformViewScaleModel.InterpolateOptions.Lerp:
                    containerHeight += EDITOR_LINE_HEIGHT;
                    break;
            }

            if (this.m_InterpolateScaleHelpOpen == true)
            {
                containerHeight += GetInterpolateHelpBoxHeight();
            }

            Rect rect = PhotonGUI.ContainerBody(containerHeight);
            Rect propertyRect = new Rect(rect.xMin + 5, rect.yMin + 2, rect.width - 10, EditorGUIUtility.singleLineHeight);

            DrawPropertyWithHelpIcon(ref propertyRect, ref this.m_InterpolateScaleHelpOpen, interpolateScaleProperty, INTERPOLATE_TOOLTIP);
            DrawHelpBox(ref propertyRect, this.m_InterpolateScaleHelpOpen, GetInterpolateHelpBoxHeight(), INTERPOLATE_HELP, INTERPOLATE_HELP_URL);

            switch (interpolateOption)
            {
                case PhotonTransformViewScaleModel.InterpolateOptions.MoveTowards:
                    EditorGUI.PropertyField(propertyRect, serializedObject.FindProperty("m_ScaleModel.InterpolateMoveTowardsSpeed"),
                                            new GUIContent("MoveTowards Speed"));
                    break;
                case PhotonTransformViewScaleModel.InterpolateOptions.Lerp:
                    EditorGUI.PropertyField(propertyRect, serializedObject.FindProperty("m_ScaleModel.InterpolateLerpSpeed"), new GUIContent("Lerp Speed"));
                    break;
            }
        }

        private void DrawHeader(string label, SerializedProperty property)
        {
            if (property == null)
            {
                return;
            }

            bool newValue = PhotonGUI.ContainerHeaderToggle(label, property.boolValue);

            if (newValue != property.boolValue)
            {
                property.boolValue = newValue;
                property.serializedObject.ApplyModifiedProperties();
            }
        }
    }
}