using System.Collections.Generic;
using System.Linq;



namespace AyaNova.DataList
{
    internal static class DataListFactory
    {
        // internal static IAyaDataList GetAyaDataList(string ListKey)
        // {
        //     switch (ListKey)
        //     {
        //         case nameof(TestWidgetUserEmailDataList):
        //             return new TestWidgetUserEmailDataList();
        //         case nameof(WidgetDataList):
        //             return new WidgetDataList();
        //         default:
        //             throw new System.ArgumentOutOfRangeException($"DataListFactory: Unknown list \"{ListKey}\"");
        //     }
        // }

        //         internal static List<string> DataListList = null;

        // private static void PopulateDataListList(){
        //     DataListList= new List<string>();
        //       foreach (System.Reflection.TypeInfo ti in ass.DefinedTypes)
        //             {
        //                 if (ti.ImplementedInterfaces.Contains(typeof(IAyaDataList)))
        //                 {
        //                     DataListList.Add(ti.Name);
        //                 }
        //             }
        // }

        //This may be fast enough to not cache but let's see
        internal static IAyaDataList GetAyaDataList(string ListKey)
        {
            System.Reflection.Assembly ass = System.Reflection.Assembly.GetEntryAssembly();

            foreach (System.Reflection.TypeInfo ti in ass.DefinedTypes)
            {
               // if (!ti.IsAbstract && ti.ImplementedInterfaces.Contains(typeof(IAyaDataList)))
               if(ti.Name==ListKey)
                {
                    return ass.CreateInstance(ti.FullName) as IAyaDataList;
                }
            }
            throw new System.ArgumentOutOfRangeException($"DEV ERROR in DataListFactory.cs: ListKey {ListKey} specified doesn't exist");
        }

        internal static List<string> GetListOfAllDataListKeyNames()
        {
            //https://stackoverflow.com/a/42574373/8939

            List<string> ret = new List<string>();
            System.Reflection.Assembly ass = System.Reflection.Assembly.GetEntryAssembly();

            foreach (System.Reflection.TypeInfo ti in ass.DefinedTypes)
            {
                if (ti.ImplementedInterfaces.Contains(typeof(IAyaDataList)))
                {
                    ret.Add(ti.Name);
                }
            }
            return ret;
        }


    }//eoc
}//eons