using BeWo.Data.Access;
using BeWo.Data.Entities;
using BeWo.Service.Core;
using BeWo.Service.DCEntityMapper;
using BS.Shared.DataContracts;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BeWo.Service.BusinessLogic
{
	public abstract class GenericBusinessLogic<TDataContract, TEntity> where TDataContract : BeWoDataContract, new () where TEntity : BeWoEntityBase, new ()
	{
		public abstract IDCEntityMapper<TEntity, TDataContract> Mapper { get; }

		public TDataContract Get(long oid)
		{
			var entity = getEntity(oid);
			var dc = Mapper.MapToNewDC(entity);
			return dc;
		}

		public virtual TDataContract Insert(TDataContract dc)
		{
			var entity = Mapper.MapToNewEntity(dc);
			DAOFactory.GenericDAO.Insert(entity);
			var dc2 = Mapper.MapToNewDC(entity);
			return dc2;
		}

		public virtual TDataContract Update(TDataContract dc)
		{
			var entity = getEntity(dc.Oid.Value);
			entity = Mapper.MergeWithEntity(dc, entity);
			DAOFactory.GenericDAO.Update(entity);
			var dc2 = Mapper.MapToNewDC(entity);
			return dc2;
		}

		public virtual void Deactivate(TDataContract dc)
		{
			var entity = getEntity(dc.Oid.Value);
			ServiceLogic.ConcurrencyCheck(dc.Version, entity);
			DAOFactory.GenericDAO.SetActivationType(entity, BS.Shared.ActivationTypeId.Deleted);
		}

		public virtual bool Delete(TDataContract dc)
		{
			var entity = getEntity(dc.Oid.Value);
			ServiceLogic.ConcurrencyCheck(dc.Version, entity);
			DAOFactory.GenericDAO.Delete(entity);
			return true;
		}

		private TEntity getEntity(long oid)
		{
			var entity = DAOFactory.GenericDAO.LoadByID<TEntity>(oid);
			return entity;
		}
	}
}