using System;
using System.Collections.Generic;
using System.Linq;
using System.ServiceModel;
using BeWo.Data;
using BeWo.Service.Plugins;
using BeWo.Data.Access;
using BeWo.Data.Entities;
using BeWo.Service.Core;
using BeWo.Service.DCEntityMapper;
using BeWo.Service.ServiceContracts;

using BS.Shared;
using BS.Shared.Core;
using BS.Shared.DataContracts;

using Utils = BeWo.Service.Core.Utils;
using BeWo.Service.Invoicing;
using Dakota.Logic;
using Dakota;
using Dakota.Models;
using System.Net;
using System.Collections.Specialized;
using Newtonsoft.Json;
using BS.Shared.Extensions;
using BS.Shared.Exceptions;
using BS.Shared.AppSender;
using BeWo.Data.Security;
using System.IO;

namespace BeWo.Service.ServiceImplementations
{
	[ServiceBehavior(InstanceContextMode = InstanceContextMode.PerCall, ConcurrencyMode = ConcurrencyMode.Single)]
	public class AccountingServiceImp : IAccountingService
	{
		public string Tenant => MultitenancyOperationContextExt.Current?.Tenant;

		public void DeactivateInvoiceBases(List<InvoiceBaseDC> invoices)
		{
			try
			{
				var s = PluginLoader.FindClass<AccountingService>();
				s.DeactivateInvoiceBases(invoices);


			}
			catch (Exception e)
			{
				throw Utils.CreateBeWoFaultException(e);
			}
		}

		public void StorniereInvoiceBases(List<InvoiceBaseDC> invoices)
		{
			try
			{
				var s = PluginLoader.FindClass<AccountingService>();
				s.StorniereInvoiceBases(invoices);


			}
			catch (Exception e)
			{
				throw Utils.CreateBeWoFaultException(e);
			}
		}

		public void DeactivateServiceInvoices(List<ServiceInvoiceDC> invoices)
		{
			try
			{
				var s = PluginLoader.FindClass<AccountingService>();
				s.DeactivateServiceInvoices(invoices);
			}
			catch (Exception e)
			{
				throw Utils.CreateBeWoFaultException(e);
			}
		}

		public void DeactivateSettlementInvoice(List<Settlement2DC> invoices)
		{
			try
			{
				ServiceLogic.SetActivationType<SettlementInvoice>(invoices.ToDictionary(i => i.SettlementIvoiceOid.Value, i => i.SettlementInvoiceVersion.Value), ActivationTypeId.Deleted);
				ServiceLogic.SetActivationType<InvoiceBase>(invoices.ToDictionary(i => i.InvoiceBaseOid.Value, i => i.InvoiceBaseVersion.Value), ActivationTypeId.Deleted);
			}
			catch (Exception e)
			{
				throw Utils.CreateBeWoFaultException(e);
			}
		}

		public List<ServiceInvoiceDC> GenerateInitialServiceInvoices(
			long costBearerOid,
			long? supportConceptOid,
			DateTimeSpan invoicePeriod)
		{
			try
			{
				var acc = PluginLoader.FindClass<AccountingService>();
				return acc.GenerateInitialServiceInvoices(costBearerOid, supportConceptOid, invoicePeriod);

			}
			catch (Exception e)
			{
				throw Utils.CreateBeWoFaultException(e);
			}
		}

		public List<InvoiceBaseDC> GetAllActiveInvoiceBases()
		{
			try
			{
				return MapperFactory.InvoiceBaseDC_InvoiceBase.MapToNewDCs(DAOFactory.GenericDAO.GetAllActive<InvoiceBase>());
			}
			catch (Exception e)
			{
				throw Utils.CreateBeWoFaultException(e);
			}
		}

		public List<InvoiceBaseDC> GetInvoiceBases(DateTime? startDate, DateTime? endDate)
		{
			try
			{
				var s = PluginLoader.FindClass<AccountingService>();

				return s.GetInvoiceBases(startDate, endDate);

			}
			catch (Exception e)
			{
				throw Utils.CreateBeWoFaultException(e);
			}
		}

		public List<InvoiceBaseDC> GetInvoiceBases2(DateTime? startDate, DateTime? endDate, bool filterByInvoiceDate)
		{
			try
			{
				var s = PluginLoader.FindClass<AccountingService>();

				return s.GetInvoiceBases(startDate, endDate, filterByInvoiceDate);

			}
			catch (Exception e)
			{
				throw Utils.CreateBeWoFaultException(e);
			}
		}

		public List<InvoiceBaseDC> GetInvoiceBasesForCostBearerAndId(DateTime? startDate, DateTime? endDate, long costBearerOid, String invoiceId)
		{
			try
			{
				var s = PluginLoader.FindClass<AccountingService>();

				return s.GetInvoiceBases(startDate, endDate, costBearerOid, invoiceId);
			}
			catch (Exception e)
			{
				throw Utils.CreateBeWoFaultException(e);
			}
		}

		public List<InvoiceBaseDC> GetInvoiceBasesForCostBearerAndIdAndIsUsed(DateTime? startDate, DateTime? endDate, long costBearerOid, String invoiceId)
		{
			try
			{
				var gkv_abrechnungen = DAOFactory.GenericDAO.GetAllActive<GkvAbrechnung>();

				var s = PluginLoader.FindClass<AccountingService>();

				var invoiceBasesFuerGkv = s.GetInvoiceBases(startDate, endDate, costBearerOid, invoiceId);
				invoiceBasesFuerGkv.AddRange(s.GetInvoiceBases(startDate, endDate, costBearerOid, "RechnungNichtaerztlicheDialysesachleistung"));
				invoiceBasesFuerGkv.AddRange(s.GetInvoiceBases(startDate, endDate, costBearerOid, "RechnungHaeuslicheKrankenpflege"));

				HashSet<long> invoices = new HashSet<long>();
				foreach (var gkv_abrechnung in gkv_abrechnungen)
				{
					foreach (var invoice in gkv_abrechnung.InvoiceBases)
					{
						invoices.Add(invoice.Oid.Value);
					}
				}

				foreach (var invoice in invoiceBasesFuerGkv)
				{
					invoice.IsAlreadyInActiveGkvAbrechnung = invoices.Contains(invoice.InvoiceBaseOid.Value);
				}

				return invoiceBasesFuerGkv;
			}
			catch (Exception e)
			{
				throw Utils.CreateBeWoFaultException(e);
			}
		}

		public List<InvoiceBaseDC> GetGeneralInvoiceBasesForCustomer(long customerOid)
		{
			try
			{
				return MapperFactory.InvoiceBaseDC_InvoiceBase.MapToNewDCs(DAOFactory.SearchDAO.GetInvoiceBaseByCustomerOid(InvoiceType.General, customerOid));
			}
			catch (Exception e)
			{
				throw Utils.CreateBeWoFaultException(e);
			}
		}

		public List<InvoiceBaseDC> GetGeneralInvoiceBasesForOrganisation(long organisationOid)
		{
			try
			{
				return MapperFactory.InvoiceBaseDC_InvoiceBase.MapToNewDCs(DAOFactory.SearchDAO.GetInvoiceBaseByOrganisationOid(InvoiceType.General, organisationOid));
			}
			catch (Exception e)
			{
				throw Utils.CreateBeWoFaultException(e);
			}
		}

		public List<InvoiceBaseDC> GetGeneralInvoiceBasesForPerson(long personOid)
		{
			try
			{
				return MapperFactory.InvoiceBaseDC_InvoiceBase.MapToNewDCs(DAOFactory.SearchDAO.GetInvoiceBaseByPersonOid(InvoiceType.General, personOid));
			}
			catch (Exception e)
			{
				throw Utils.CreateBeWoFaultException(e);
			}
		}

		public List<InvoiceBaseDC> GetInvoiceBasesForSupportConcept(InvoiceType type, long supportConceptOid)
		{
			try
			{
				return MapperFactory.InvoiceBaseDC_InvoiceBase.MapToNewDCs(DAOFactory.SearchDAO.GetInvoiceBaseByTypeAndSupportConceptOid(type, supportConceptOid));
			}
			catch (Exception e)
			{
				throw Utils.CreateBeWoFaultException(e);
			}
		}

		public ServiceInvoiceDC GetServiceInvoiceByInvoiceBaseOid(long invoiceBaseOid)
		{
			try
			{
				var dc = MapperFactory.ServiceInvoiceDC_ServiceInvoice.MapToNewDC(DAOFactory.SearchDAO.GetServiceInvoiceByInvoiceBaseOid(invoiceBaseOid));

				SortServiceInvoicePeriods(dc);
				return dc;
			}
			catch (Exception e)
			{
				throw Utils.CreateBeWoFaultException(e);
			}
		}

		public List<ServiceInvoiceDC> GetServiceInvoices(long costBearerOid, long? supportConceptOid, DateTimeSpan period)
		{
			try
			{
				List<ServiceInvoice> entities = DAOFactory.SearchDAO.GetServiceInvoices(costBearerOid, supportConceptOid, period);
				entities.Sort((x, y) =>
							  {
								  if (y.InvoiceBase.InvoiceDate.Value.Date.Equals(x.InvoiceBase.InvoiceDate.Value.Date))
								  {
									  return y.InvoiceBase.InvoiceNumber.CompareTo(x.InvoiceBase.InvoiceNumber);
								  }

								  return y.InvoiceBase.InvoiceDate.Value.Date.CompareTo(x.InvoiceBase.InvoiceDate.Value.Date);
							  });

				var dcList = MapperFactory.ServiceInvoiceDC_ServiceInvoice.MapToNewDCs(entities);

				foreach (var serviceInvoice in dcList)
				{
					SortServiceInvoicePeriods(serviceInvoice);
				}
				return dcList;
			}
			catch (Exception e)
			{
				throw Utils.CreateBeWoFaultException(e);
			}
		}

		private void SortServiceInvoicePeriods(ServiceInvoiceDC serviceInvoice)
		{
			if (serviceInvoice.ServiceInvoicePeriods != null)
			{
				serviceInvoice.ServiceInvoicePeriods.Sort((x, y) =>
				{
					if (x.Customer != null && y.Customer != null)
						return x.Customer.ToString().CompareTo(y.Customer.ToString());
					else if (x.Start != null && y.Start != null)
					{
						x.Start.Value.CompareTo(y.Start.Value);
					}
					return 0;
				});
			}
		}

		public Settlement2DC GetSettlementByInvoiceBaseOid(long invoiceBaseOid)
		{
			try
			{
				return MapperFactory.SettlementDC_SettlementInvoice.MapToNewDC(DAOFactory.SearchDAO.GetSettlementInvoiceByInvoiceBaseOid(invoiceBaseOid));
			}
			catch (Exception e)
			{
				throw Utils.CreateBeWoFaultException(e);
			}
		}

		public List<Settlement2DC> GetSettlementInvoicesForCostBearerAndPeriod(long costBearerOid, DateTime periodStart, DateTime periodEnd)
		{
			try
			{
				return MapperFactory.SettlementDC_SettlementInvoice.MapToNewDCs(DAOFactory.SearchDAO.GetSettlementInvoicesForCostBearerAndPeriod(costBearerOid, periodStart, periodEnd));
			}
			catch (Exception e)
			{
				throw Utils.CreateBeWoFaultException(e);
			}
		}

		public List<Settlement2DC> GetSettlementInvoicesForSupportConcept(long supportConceptOid)
		{
			try
			{
				return MapperFactory.SettlementDC_SettlementInvoice.MapToNewDCs(DAOFactory.SearchDAO.GetSettlementInvoiceBySupportConceptOid(supportConceptOid));
			}
			catch (Exception e)
			{
				throw Utils.CreateBeWoFaultException(e);
			}
		}

		public List<long> InsertNewInvoiceBases(List<InvoiceBaseDC> invoices)
		{
			try
			{
				if (invoices != null && LoggedInUserOperationContextExt.Current != null &&
					LoggedInUserOperationContextExt.Current.User != null)
				{
					var loggedInUser = LoggedInUserOperationContextExt.Current.User;

					foreach (var ib in invoices)
					{
						ib.SenderContactInformations = new List<ContactDC>();


						foreach (var contact in loggedInUser.Employee.Person.Contacts)
						{
							var newContact = new ContactDC();
							newContact.ContactType = contact.Type;
							newContact.ContactValue = contact.Value;

							ib.SenderContactInformations.Add(newContact);
						}
					}


				}

				var newInvoices = MapperFactory.InvoiceBaseDC_InvoiceBase.MapToNewEntities(invoices);
				int count = 0;

				var inc = PluginLoader.FindClass<InvoiceNumberGenerator>();

				foreach (var ib in newInvoices)
				{
					if (ib.Type == InvoiceType.General)
					{
						foreach (var item in ib.InvoiceItems)
						{
							item.AmountTotal = Math.Round(item.AmountTotal ?? 0, 2, MidpointRounding.AwayFromZero);
						}
					}
					var nextNumber = inc.GetNextInvoiceNumber(count, ib);
					if (!String.IsNullOrEmpty(nextNumber))
					{
						if (!String.IsNullOrEmpty(ib.InvoiceNumber)) // Rechnungsnummer schon vorher erzeugt oder per Hand vergeben.
						{
							if (ib.InvoiceNumber == nextNumber)
							//Die per Hand vergebene Rechnungsnummer ist gleich der nächsten berechneten Rechnungsnummer, daher Rechnungsnummerzähler erhöhen
							{
								count++;
							}
						}
						else
						{
							ib.InvoiceNumber = nextNumber;
							count++;
						}
					}
				}

				var factory = PluginLoader.FindClass<InvoiceFactory>();

				if (factory != null)
				{
					foreach (var ib in newInvoices)
					{
						if (ib.Type == InvoiceType.CustomerEquity)
						{
							var creator = factory.CreateEquityInvoiceCreator(ib);
							creator.InitEquityInvoice(ib);
						}
						else if (ib.Type == InvoiceType.General)
						{
							var creator = factory.CreateGeneralInvoiceCreator(ib);
							creator.InitInvoice(ib);
						}
					}


				}



				DAOFactory.GenericDAO.Insert(newInvoices);

				inc.IncreaseInvoiceNumber(count, newInvoices);

				return newInvoices.Select(i => i.Oid.Value).ToList();
			}
			catch (Exception e)
			{
				throw Utils.CreateBeWoFaultException(e);
			}
		}

		public List<long> InsertNewServiceInvoices(List<ServiceInvoiceDC> invoices)
		{
			try
			{
				//Prüfe Flags
				var neueRechnungen = new List<ServiceInvoiceDC>();
				var diffRechnungen = invoices.Where(i => i.InvoiceBase.DiffErstellen).ToList();

				//Bei neuer Rechung prüfen, ob eine Diff Rechnung vorher generiert wurde.
				foreach (var item in invoices.Where(i => i.InvoiceBase.NeuErstellen))
				{
					if (item.OriginalZurDifferenz != null)
					{
						neueRechnungen.Add(item.OriginalZurDifferenz);
					}
					else
					{
						neueRechnungen.Add(item);
					}
				}

				var newInvoices = MapperFactory.ServiceInvoiceDC_ServiceInvoice.MapToNewEntities(neueRechnungen);
				newInvoices.AddRange(MapperFactory.ServiceInvoiceDC_ServiceInvoice.MapToNewEntities(diffRechnungen));
				if (newInvoices.Count > 0)
				{
					int count = 0;
					var inc = PluginLoader.FindClass<InvoiceNumberGenerator>();

					foreach (var i in newInvoices)
					{
						var nextNumber = inc.GetNextInvoiceNumber(count, i.InvoiceBase);
						if (!String.IsNullOrEmpty(nextNumber))
						{
							//if (!String.IsNullOrEmpty(i.InvoiceBase.InvoiceNumber) && newInvoices.Count == 1)
							// // Rechnungsnummer schon vorher erzeugt oder per Hand vergeben.
							//{
							// if (i.InvoiceBase.InvoiceNumber == nextNumber || newInvoices.Count > 1)
							//  //Die per Hand vergebene Rechnungsnummer ist gleich der nächsten berechneten Rechnungsnummer, daher Rechnungsnummerzähler erhöhen
							// {
							//  count++;
							// }
							//}
							//else
							//{
							i.InvoiceBase.InvoiceNumber = nextNumber;
							count++;
							//}
						}
					}

					DAOFactory.GenericDAO.Insert(newInvoices);

					inc.IncreaseInvoiceNumberForServiceInvoices(count, newInvoices);
				}
				return newInvoices.Select(i => i.Oid.Value).ToList();
			}
			catch (Exception e)
			{
				throw Utils.CreateBeWoFaultException(e);
			}
		}


		public List<long> InsertNewSettlementInvoice(List<Settlement2DC> invoices)
		{
			try
			{

				var newInvoices = MapperFactory.SettlementDC_SettlementInvoice.MapToNewEntities(invoices);
				int count = 0;
				var inc = PluginLoader.FindClass<InvoiceNumberGenerator>();

				foreach (var i in newInvoices)
				{
					var nextNumber = inc.GetNextInvoiceNumber(count, i.InvoiceBase);
					if (!String.IsNullOrEmpty(nextNumber))
					{
						if (!String.IsNullOrEmpty(i.InvoiceBase.InvoiceNumber)) // Rechnungsnummer schon vorher erzeugt oder per Hand vergeben.
						{
							if (i.InvoiceBase.InvoiceNumber == nextNumber)
							//Die per Hand vergebene Rechnungsnummer ist gleich der nächsten berechneten Rechnungsnummer, daher Rechnungsnummerzähler erhöhen
							{
								count++;
							}
						}
						else
						{
							i.InvoiceBase.InvoiceNumber = nextNumber;
							count++;
						}
					}
				}

				DAOFactory.GenericDAO.Insert(newInvoices);

				inc.IncreaseInvoiceNumber(count, newInvoices);
				return newInvoices.Select(i => i.Oid.Value).ToList();
			}
			catch (Exception e)
			{
				throw Utils.CreateBeWoFaultException(e);
			}
		}

		public InvoiceBaseDC LoadInvoiceBaseByOid(long invoiceBaseOid)
		{
			try
			{
				var r = MapperFactory.InvoiceBaseDC_InvoiceBase.MapToNewDC(
				DAOFactory.GenericDAO.LoadByID<InvoiceBase>(invoiceBaseOid));

				if (r.Type == InvoiceType.Settlement && r.SupportConceptOid != null)
				{
					SupportConcept sc = DAOFactory.GenericDAO.LoadByID<SupportConcept>(r.SupportConceptOid.Value);
					r.CustomerFirstName = sc.Customer.Person.FirstName;
					r.CustomerLastName = sc.Customer.Person.LastName;

				}

				return r;
			}
			catch (Exception e)
			{
				throw Utils.CreateBeWoFaultException(e);
			}
		}

		public InvoiceNumberDC LoadInvoiceNumber()
		{
			try
			{
				var inr = DAOFactory.GenericDAO.LoadByID<InvoiceNumber>(1);
				if (inr != null)
					return MapperFactory.InvoiceNumberDC_InvoiceNumber.MapToNewDC(inr);
				return null;
			}
			catch (Exception e)
			{
				throw Utils.CreateBeWoFaultException(e);
			}
		}

		public ServiceInvoiceDC LoadServiceInvoiceByOid(long serviceInvoiceOid)
		{
			try
			{
				var r = MapperFactory.ServiceInvoiceDC_ServiceInvoice.MapToNewDC(DAOFactory.GenericDAO.LoadByID<ServiceInvoice>(serviceInvoiceOid));

				return r;
			}
			catch (Exception e)
			{
				throw Utils.CreateBeWoFaultException(e);
			}
		}

		public List<long> UpdateInvoiceBases(List<InvoiceBaseDC> invoices)
		{
			try
			{
				var originals = DAOFactory.GenericDAO.LoadByIDs<InvoiceBase>(invoices.Select(i => i.InvoiceBaseOid.Value));
				bool macheMerge = true;
				foreach (var entity in originals)
				{
					var dc = invoices.Where(i => i.InvoiceBaseOid == entity.Oid).FirstOrDefault();


					if (dc.IsPaid != entity.IsPaid ||
						dc.IsExported != entity.IsExported ||
						dc.IsReviewed != entity.IsReviewed ||
						dc.IsSent != entity.IsSent ||
						dc.PartialPayment != entity.PartialPayment)
					{
						//Kann nur über die Rechnungsübersicht geändert werden, daher kein Merge mit dem dc machen!
						entity.IsPaid = dc.IsPaid;
						entity.IsExported = dc.IsExported;
						entity.IsReviewed = dc.IsReviewed;
						entity.IsSent = dc.IsSent;
						entity.PartialPayment = dc.PartialPayment;
						macheMerge = false;
						DAOFactory.GenericDAO.Update(entity);
					}
				}

				if (macheMerge)
				{
					MapperFactory.InvoiceBaseDC_InvoiceBase.MergeWithEntitys(invoices, originals);
					DAOFactory.GenericDAO.Update(originals);
				}
				return originals.Select(e => e.Version.Value).ToList();
			}
			catch (Exception e)
			{
				throw Utils.CreateBeWoFaultException(e);
			}
		}

		public List<long> SetInvoicePaid(List<InvoiceBaseDC> invoices, bool isPaid)
		{
			try
			{
				var originals = DAOFactory.GenericDAO.LoadByIDs<InvoiceBase>(invoices.Select(i => i.InvoiceBaseOid.Value));
				foreach (var invoiceBase in originals)
				{
					invoiceBase.IsPaid = isPaid;
				}
				DAOFactory.GenericDAO.Update(originals);
				return originals.Select(e => e.Version.Value).ToList();
			}
			catch (Exception e)
			{
				throw Utils.CreateBeWoFaultException(e);
			}
		}

		public InvoiceNumberDC UpdateInvoiceNumber(InvoiceNumberDC dc)
		{
			try
			{

				var old = DAOFactory.GenericDAO.LoadByID<InvoiceNumber>(1);
				MapperFactory.InvoiceNumberDC_InvoiceNumber.MergeWithEntity(dc, old);
				DAOFactory.GenericDAO.Update(old);

				return MapperFactory.InvoiceNumberDC_InvoiceNumber.MapToNewDC(old);
			}
			catch (Exception e)
			{
				throw Utils.CreateBeWoFaultException(e);
			}
		}

		public List<long> UpdateServiceInvoices(List<ServiceInvoiceDC> invoices)
		{
			try
			{
				var acc = PluginLoader.FindClass<AccountingService>();
				return acc.UpdateServiceInvoices(invoices);
			}
			catch (Exception e)
			{
				throw Utils.CreateBeWoFaultException(e);
			}
		}

		public void UpdateSettlementInvoice(List<Settlement2DC> invoices)
		{
			try
			{
				var originals = DAOFactory.GenericDAO.LoadByIDs<SettlementInvoice>(invoices.Select(i => i.SettlementIvoiceOid.Value));
				MapperFactory.SettlementDC_SettlementInvoice.MergeWithEntitys(invoices, originals);

				//originals.ForEach(
				//                  i =>
				//                  {
				//i.InvoiceBase.Type = InvoiceType.Settlement;

				// We´ll add an invoiceitem, so we can treat a settlement like any other invoice
				//i.InvoiceBase.InvoiceItems.Clear();
				//i.InvoiceBase.InvoiceItems.Add(
				//                               new InvoiceItem
				//                               {
				//                                   AmountTotal = i.Claim,
				//                                   ItemPeriodStart = i.InvoiceBase.AccountingPeriodStart,
				//                                   ItemPeriodEnd = i.InvoiceBase.AccountingPeriodEnd,
				//                                   ItemDescription = "Spitzabrechung"
				//                               });
				//});
				DAOFactory.GenericDAO.Update(originals);
			}
			catch (Exception e)
			{
				throw Utils.CreateBeWoFaultException(e);
			}
		}


		public List<InvoiceNumberDC> LoadInvoiceNumberList()
		{
			try
			{
				var numbers = DAOFactory.GenericDAO.GetAllActive<InvoiceNumber>();

				return MapperFactory.InvoiceNumberDC_InvoiceNumber.MapToNewDCs(numbers);

			}
			catch (Exception e)
			{
				throw Utils.CreateBeWoFaultException(e);
			}
		}

		public List<InvoiceNumberDC> UpdateInvoiceNumberList(List<InvoiceNumberDC> dclist)
		{
			try
			{
				var numbers = DAOFactory.GenericDAO.GetAllActive<InvoiceNumber>();

				MapperFactory.InvoiceNumberDC_InvoiceNumber.MergeWithEntitys(dclist, numbers);
				DAOFactory.GenericDAO.Update(numbers);

				return MapperFactory.InvoiceNumberDC_InvoiceNumber.MapToNewDCs(numbers);
			}
			catch (Exception e)
			{
				throw Utils.CreateBeWoFaultException(e);
			}
		}
	}
}