// /**
//  * File: ManagedObjectDescriptor.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.Reflection;
using ln.json;
using ln.types.net;
using ln.json.attributes;
namespace ln.manage
{
    public class PropertyDescriptorAttribute : Attribute
    {
        public string Group { get; set; }
        public string Alias { get; set; }
        public bool ReadOnly { get; set; }
        public string LookupPath { get; set; }

        public bool Identity { get; set; }
    }

    public class PropertyDescriptor
    {
        public IManagedContainer Container { get; }

        public string PropertyGroup { get; }
        public string PropertyName { get; }
        public Type PropertyType { get; }

        public bool ReadOnly { get; }
        public string LookupPath { get; }

        public bool Identity { get; }

        public PropertyDescriptor(IManagedContainer container, string propertyGoup, string propertyName, Type propertyType, bool readOnly, string lookupPath, bool identity)
        {
            Container = container;
            PropertyGroup = propertyGoup;
            PropertyName = propertyName;
            PropertyType = propertyType;
            ReadOnly = readOnly;
            LookupPath = lookupPath;
            Identity = identity;
        }
        public PropertyDescriptor(IManagedContainer container, FieldInfo fieldInfo)
            : this(container, fieldInfo.GetCustomAttribute<PropertyDescriptorAttribute>()?.Group, fieldInfo.GetCustomAttribute<PropertyDescriptorAttribute>()?.Alias ?? fieldInfo.Name, fieldInfo.FieldType, fieldInfo.GetCustomAttribute<PropertyDescriptorAttribute>()?.ReadOnly ?? fieldInfo.IsInitOnly, fieldInfo.GetCustomAttribute<PropertyDescriptorAttribute>()?.LookupPath, fieldInfo.GetCustomAttribute<PropertyDescriptorAttribute>()?.Identity ?? false)
        { }
        public PropertyDescriptor(IManagedContainer container, PropertyInfo propertyInfo)
            : this(container, propertyInfo.GetCustomAttribute<PropertyDescriptorAttribute>()?.Group, propertyInfo.GetCustomAttribute<PropertyDescriptorAttribute>()?.Alias ?? propertyInfo.Name, propertyInfo.PropertyType, propertyInfo.GetCustomAttribute<PropertyDescriptorAttribute>()?.ReadOnly ?? !propertyInfo.CanWrite, propertyInfo.GetCustomAttribute<PropertyDescriptorAttribute>()?.LookupPath, propertyInfo.GetCustomAttribute<PropertyDescriptorAttribute>()?.Identity ?? false)
        { }

        public JSONObject CreateJsonDescriptor()
        {
            JSONObject descriptor = new JSONObject();

            descriptor["name"] = PropertyName;
            descriptor["readonly"] = ReadOnly;

            if (typeof(string).Equals(PropertyType))
            {
                descriptor["type"] = "string";
            }
            else if (typeof(int).Equals(PropertyType))
            {
                descriptor["type"] = "int";
            }
            else if (typeof(double).Equals(PropertyType))
            {
                descriptor["type"] = "double";
            }
            else if (typeof(IPv4).Equals(PropertyType))
            {
                descriptor["type"] = "ip4";
            }
            else if (typeof(IPv6).Equals(PropertyType))
            {
                descriptor["type"] = "ip6";
            }
            else if (typeof(MAC).Equals(PropertyType))
            {
                descriptor["type"] = "mac";
            }
            else if (PropertyType.IsEnum)
            {
                if (PropertyType.GetCustomAttribute<FlagsAttribute>() != null)
                {
                    JSONObject type = new JSONObject();
                    string[] names = Enum.GetNames(PropertyType);
                    int[] values = (int[])Enum.GetValues(PropertyType);
                    for (int n = 0; n < names.Length; n++)
                        type[names[n]] = values[n];
                    descriptor["type"] = type;
                }
                else
                {
                    JSONArray type = new JSONArray();
                    string[] symbols = Enum.GetNames(PropertyType);
                    foreach (string symbol in symbols)
                        type.Add(symbol);
                    descriptor["type"] = type;
                }
            }
            else if (LookupPath != null)
            {
                // ToDo: Implement Referenced Objects
                throw new NotImplementedException();
            }
            else
            {
                throw new NotSupportedException();
            }

            return descriptor;
        }
    }
}