using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using Luticate2.Auth.Utils.Interfaces;

namespace Luticate2.Auth.Utils.Business.Converters
{
    public class LuConvertersAllocator : ILuConvertersAllocator
    {
        protected static IDictionary<Type, Type> listTypes = new Dictionary<Type, Type>
        {
            {typeof(IEnumerable<>), typeof(List<>)},
            {typeof(ICollection<>), typeof(Collection<>)},
            {typeof(Collection<>), typeof(Collection<>)},
            {typeof(IList<>), typeof(List<>)},
            {typeof(List<>), typeof(List<>)}
        };

        public object GetInstance(Type type)
        {
            if (type.IsGenericType)
            {
                var gtype = type.GetGenericTypeDefinition();

                if (listTypes.ContainsKey(gtype))
                {
                    var glistType = listTypes[gtype].MakeGenericType(type.GenericTypeArguments[0]);
                    return Activator.CreateInstance(glistType);
                }
            }
            return Activator.CreateInstance(type);
        }
    }
}