// /**
//  * File: ManagedNativeObject.cs
//  * Author: haraldwolff
//  *
//  * This file and it's content is copyrighted by the Author and / or copyright holder.
//  * Any use wihtout proper permission is illegal and may lead to legal actions.
//  *
//  *
//  **/
using System;
using System.Collections.Generic;
namespace ln.manage
{
    public class ManagedNativeObject<T> : IManagedObject where T:class,IDisposable
    {
        T instance;
        Dictionary<string, object> properties = new Dictionary<string, object>();

        public ManagedNativeObject(IManagedContainer container)
        {
            Container = container;
        }

        public IManagedContainer Container { get; }
        public object Identity => GetValue(Container.IdentityPropertyName);

        public bool Enabled { 
            get => instance != null;
            set
            {
                if (value && !Enabled)
                {
                    instance = (T)Activator.CreateInstance<T>();
                    Sync();
                } else if (!value && Enabled)
                {
                    instance.Dispose();
                    SyncBack();
                    instance = null;
                }
            }
        }

        public bool Valid => throw new NotImplementedException();

        public object GetValue(string propertyName)
        {
            return (instance != null) ? (Container as ManagedNativeContainer<T>).GetNativePropertyDescriptor(propertyName).GetValue(instance) : properties[propertyName];
        }

        public void SetValue(string propertyName, object value)
        {
            if (instance != null)
                (Container as ManagedNativeContainer<T>).GetNativePropertyDescriptor(propertyName).SetValue(instance, value);
            properties[propertyName] = value;
        }

        private void Sync()
        {
            foreach (NativePropertyDescriptor nativePropertyDescriptor in (Container as ManagedNativeContainer<T>).NativePropertyDescriptors)
            {
                if (properties.ContainsKey(nativePropertyDescriptor.PropertyName))
                    nativePropertyDescriptor.SetValue(instance, properties[nativePropertyDescriptor.PropertyName]);
            }
        }
        private void SyncBack()
        {
            foreach (NativePropertyDescriptor nativePropertyDescriptor in (Container as ManagedNativeContainer<T>).NativePropertyDescriptors)
            {
                properties[nativePropertyDescriptor.PropertyName] = nativePropertyDescriptor.GetValue(instance);
            }
        }
    }
}