#if UNITY_2020_2_OR_NEWER

using UnityEditor.Localization.Bridge;
using UnityEngine;
using UnityEngine.Localization;
using UnityEngine.Localization.PropertyVariants;
using UnityEngine.Localization.Pseudo;
using UnityEngine.Localization.Settings;
using UnityEditor.Localization.UI.PropertyVariants;

namespace UnityEditor.Localization.UI
{
    [InitializeOnLoad]
    class DrivenPropertyDrawer
    {
        static DrivenPropertyDrawer()
        {
            EditorGUIUtilityBridge.beginProperty += BeginProperty;
        }

        static void BeginProperty(Rect rect, SerializedProperty property)
        {
            if (!LocalizationSettings.HasSettings ||
                EditorApplication.isPlayingOrWillChangePlaymode ||
                GameObjectLocalizerEditor.CurrentTarget != null ||
                !LocalizationSettings.SelectedLocaleAsync.IsValid() ||
                LocalizationSettings.SelectedLocaleAsync.Result == null)
                return;

            if (DrivenPropertyManagerInternalBridge.IsDriving(LocalizationPropertyDriver.instance, property.serializedObject.targetObject, property.propertyPath))
            {
                // Properties driven by a UnityEvent are disabled as changes to them would be ignored.
                GUI.enabled = false;
                GUI.backgroundColor = PrefColorBridge.DrivenProperty;
            }
            #if ENABLE_PROPERTY_VARIANTS
            else if (DrivenPropertyManagerInternalBridge.IsDriving(VariantsPropertyDriver.instance, property.serializedObject.targetObject, property.propertyPath))
            {
                if (property.serializedObject.targetObject is Component component)
                {
                    var trackedProperty = component.GetComponent<GameObjectLocalizer>()?.GetTrackedObject(component)?.GetTrackedProperty(property.propertyPath);
                    if (trackedProperty == null)
                        return;

                    const float iconSize = 18;
                    rect.xMin -= iconSize;
                    rect.size = new Vector2(iconSize, iconSize);
                    GUI.Label(rect, EditorIcons.GameObjectLocalizer, GUI.skin.label);
                    GUI.backgroundColor = trackedProperty.HasVariant(LocalizationSettings.SelectedLocale.Identifier) ? PrefColorBridge.VariantWithOverrideProperty : PrefColorBridge.VariantProperty;

                    if (LocalizationSettings.SelectedLocale is PseudoLocale)
                        GUI.enabled = false;
                }
            }
            #endif
        }
    }
}
#endif