using EnVisage.Code.BLL;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace EnVisage.Code.Integration
{
    public class CrmHelper
    {
        private static string HelperClass = "EnVisage.Code.Integration.CrmAccess";
        public static CrmAccess GetCrm()
        {

            IntegrationManager man = new IntegrationManager(new EnVisageEntities());
            var model = man.getCrmModel();
            string CrmAccessStringType = model.CrmAccessClass;
            if (String.IsNullOrEmpty(CrmAccessStringType))
            {
                return null;
            }
            else {
                System.Type crmAccessType = System.Type.GetType(CrmAccessStringType);
                if (crmAccessType == null)
                {
                    throw (new NullReferenceException("crmAccessType"+ CrmAccessStringType + " can not be found"));
                }
                System.Type tp = System.Type.GetType(HelperClass);
                if (!tp.IsAssignableFrom(crmAccessType))
                {
                    throw (new ArgumentException("crmAccessType("+ CrmAccessStringType + ") does not inherit from "+ HelperClass));

                }
                CrmAccess crm = (CrmAccess) Activator.CreateInstance(crmAccessType);
                return (crm);
            }

        }
    }
}