using System.Collections.Generic;
using BeWo.Data.Access;
using BeWo.Data.Entities;

using BS.Shared.DataContracts;

namespace BeWo.Service.DCEntityMapper
{
    public class TextModuleDC_TextModule : AbstractIDCEntityMapper<TextModule, TextModuleDC>
    {
        public IList<TextModuleDC> CreateDcList(IEnumerable<TextModule> textmodules)
        {
            var list = new List<TextModuleDC>();
            Dictionary<long, IList<long>> parentChildDict = new Dictionary<long, IList<long>>();
            foreach (var tm in textmodules)
            {
                var dc = CreateTextModuleDC(tm, parentChildDict);
                
                list.Add(dc);
            }

            return list;

        }

        private TextModuleDC CreateTextModuleDC(TextModule tm, Dictionary<long, IList<long>> parentChildDict)
        {
            var dc = new TextModuleDC();
            dc.Position = tm.Position;
            dc.TextModuleVersion = tm.Version.Value;
            dc.TextModuleOid = tm.Oid.Value;
            dc.Text = tm.Text;
            dc.Name = tm.Name;
            dc.IsOnlyForEmployee = tm.IsOnlyForEmployee;
            dc.IsParent = tm.IsParent;
            dc.IsExpanded = tm.IsExpanded;
            dc.ActivationType = tm.IsActive;

            dc.ServiceCategory = tm.ServiceCategory != null ? MapperFactory.ServiceCategoryDC_ServiceCategory.MapToNewDC(tm.ServiceCategory) : null;

            dc.Employee = tm.Employee != null ? MapperFactory.CompactEmployeeDC_Employee.MapToNewDC(tm.Employee) : null;



            if (tm.Parent != null)
            {
                //Vermeide Endlosschleifen. Es gab mal den Fall, da hat es ein Kunde geschafft, dass der Parent eines Textbausteins gleichzeitig ein Kind desselben Bausteins war.
                if (!parentChildDict.ContainsKey(tm.Parent.Oid.Value))
                {
                    parentChildDict.Add(tm.Parent.Oid.Value, new List<long>());
                }
                parentChildDict[tm.Parent.Oid.Value].Add(tm.Oid.Value);

                bool addParent = true;
                if (parentChildDict.ContainsKey(tm.Oid.Value))
                {
                    var childOids = parentChildDict[tm.Oid.Value];

                    if (childOids.Contains(tm.Parent.Oid.Value))
                    {
                        addParent = false;
                    }
                }

                if (addParent && tm.Parent.IsActive != BS.Shared.ActivationTypeId.Deleted)
                {
                    dc.Parent = CreateTextModuleDC(tm.Parent, parentChildDict);
                }
            }

            return dc;
        }

        public override TextModuleDC MergeWithDC(TextModule pEntity, TextModuleDC pDataContract)
        {
            pDataContract.Position            = pEntity.Position;
            pDataContract.TextModuleVersion   = pEntity.Version.Value;
            pDataContract.TextModuleOid       = pEntity.Oid.Value;
            pDataContract.Text                = pEntity.Text;
            pDataContract.Name                = pEntity.Name;
            pDataContract.IsOnlyForEmployee   = pEntity.IsOnlyForEmployee;
	        pDataContract.IsParent            = pEntity.IsParent;
	        pDataContract.IsExpanded          = pEntity.IsExpanded;
            pDataContract.ActivationType      = pEntity.IsActive;

            pDataContract.Parent = pEntity.Parent != null ? MapperFactory.TextModuleDC_TextModule.MapToNewDC(pEntity.Parent) : null;

            pDataContract.ServiceCategory = pEntity.ServiceCategory != null ? MapperFactory.ServiceCategoryDC_ServiceCategory.MapToNewDC(pEntity.ServiceCategory) : null;

            pDataContract.Employee = pEntity.Employee != null ? MapperFactory.CompactEmployeeDC_Employee.MapToNewDC(pEntity.Employee) : null;

            return pDataContract;
        }

        public override TextModule MergeWithEntity(TextModuleDC pDataContract, TextModule pEntity)
        {
            ConcurrencyCheck(pDataContract.TextModuleVersion, pEntity);

            pEntity.Position          = pDataContract.Position;
            pEntity.Oid               = pDataContract.TextModuleOid;
            pEntity.Text              = pDataContract.Text;
            pEntity.Name              = pDataContract.Name;
            pEntity.IsOnlyForEmployee = pDataContract.IsOnlyForEmployee;
	        pEntity.IsParent          = pDataContract.IsParent;
	        pEntity.IsExpanded        = pDataContract.IsExpanded;
            pEntity.IsActive          = pDataContract.ActivationType;

            pEntity.Parent = pDataContract.Parent != null ? DAOFactory.GenericDAO.LoadByID<TextModule>(pDataContract.Parent.TextModuleOid.Value) : null;

            if(pDataContract.ServiceCategory != null)
            {
                pEntity.ServiceCategory = pDataContract.ServiceCategory.ServiceCategoryOid.HasValue
                    ? DAOFactory.GenericDAO.LoadByID<ServiceCategory>(pDataContract.ServiceCategory.ServiceCategoryOid.Value)
                    : MapperFactory.ServiceCategoryDC_ServiceCategory.MapToNewEntity(pDataContract.ServiceCategory);
            }
            else
            {
                pEntity.ServiceCategory = null;
            }

            pEntity.Employee = pDataContract.Employee != null ? DAOFactory.GenericDAO.LoadByID<Employee>(pDataContract.Employee.EmployeeOid) : null;

            return pEntity;
        }

        protected override bool AreDCAndEntityEqual(TextModuleDC pDC, TextModule pEntity)
        {
            return pDC.TextModuleOid == pEntity.Oid;
        }
    }
}