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

namespace AyaNova.DataList
{
    internal static class DataListFactory
    {

        //Instantiate list object specified
        //this is safe as it's only attempting to load assemblies in the AyaNova.DataList namespace so can't attempt to instantiate some random object or nefarious object
        //returns null if doesn't exist
        internal static IDataListProcessing GetAyaDataList(string ListKey, long translationId)
        {
            System.Reflection.Assembly ass = System.Reflection.Assembly.GetEntryAssembly();
            return ass.CreateInstance($"AyaNova.DataList.{ListKey}", false, System.Reflection.BindingFlags.Default, null, new object[] { translationId }, null, null) as IDataListProcessing;

        }

        //List all the datalist types available
        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.IsAbstract && ti.ImplementedInterfaces.Contains(typeof(IDataListProcessing)))
                {
                    ret.Add(ti.Name);
                }
            }
            return ret;
        }

        //Verify listkey
        internal static bool ListKeyIsValid(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(IDataListProcessing)))
                {
                    if (ti.Name == listKey)
                        return true;
                }
            }
            return false;
        }


    }//eoc
}//eons