/*
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 * All rights reserved.
 *
 * Licensed under the Oculus SDK License Agreement (the "License");
 * you may not use the Oculus SDK except in compliance with the License,
 * which is provided at the time of installation or download, or which
 * otherwise accompanies this software in either electronic or hard copy form.
 *
 * You may obtain a copy of the License at
 *
 * https://developer.oculus.com/licenses/oculussdk/
 *
 * Unless required by applicable law or agreed to in writing, the Oculus SDK
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

using UnityEditor;
using UnityEngine;

namespace Oculus.Interaction.Editor
{
    [CustomPropertyDrawer(typeof(ConditionalHideAttribute))]
    public class ConditionalHideDrawer : PropertyDrawer
    {
        bool FulfillsCondition(SerializedProperty property)
        {
            ConditionalHideAttribute hideAttribute = (ConditionalHideAttribute)attribute;

            int index = property.propertyPath.LastIndexOf('.');
            string containerPath = property.propertyPath.Substring(0, index + 1);
            string conditionPath = containerPath + hideAttribute.ConditionalFieldPath;
            SerializedProperty conditionalProperty = property.serializedObject.FindProperty(conditionPath);

            if (conditionalProperty.type == "Enum")
            {
                return conditionalProperty.enumValueIndex == (int)hideAttribute.HideValue;
            }
            if (conditionalProperty.type == "int")
            {
                return conditionalProperty.intValue == (int)hideAttribute.HideValue;
            }
            if (conditionalProperty.type == "float")
            {
                return conditionalProperty.floatValue == (float)hideAttribute.HideValue;
            }
            if (conditionalProperty.type == "string")
            {
                return conditionalProperty.stringValue == (string)hideAttribute.HideValue;
            }
            if (conditionalProperty.type == "double")
            {
                return conditionalProperty.doubleValue == (double)hideAttribute.HideValue;
            }
            if (conditionalProperty.type == "bool")
            {
                return conditionalProperty.boolValue == (bool)hideAttribute.HideValue;
            }

            return conditionalProperty.objectReferenceValue == (object)hideAttribute.HideValue;
        }

        public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
        {
            if (FulfillsCondition(property))
            {
                EditorGUI.PropertyField(position, property, label, true);
            }
        }

        public override float GetPropertyHeight(SerializedProperty property, GUIContent label)
        {
            if (FulfillsCondition(property))
            {
                return EditorGUI.GetPropertyHeight(property, label, true);
            }
            else
            {
                return -EditorGUIUtility.standardVerticalSpacing;
            }
        }
    }
}