using Sarand.BusinessMgr.Net.Standard.Base.App;
using Sarand.BusinessMgr.Net.Standard.Base.Bus;
using Sarand.BusinessMgr.Net.Standard.Base.Mgr;
using Sarand.Net.Standard.Base.App;
using Sarand.Net.Standard.Base.Bus;
using Sarand.Net.Standard.Base.Core;
using Sarand.Net.Standard.Base.Dbas;
using Sarand.Net.Standard.Base.Interfaces;
using Sarand.Net.Standard.Base.Utils;
using Sarand.Net.Standard.Dbas.Base;
using System;
using System.Collections.Generic;

namespace Sarand.BusinessMgr.Net.Standard.Dbas.Bus
{
	//=======================================================================
	class SbmTransaction_Dbas : SbmTransaction
	{
		//-------------------------------------------------------------------
		// Data members.
		private readonly SbmUserContext userContext;
		private SbmAccountMgr accountMgr;
		private SbmDataItemMgr dataItemMgr;
		private SbmStockMgr stockMgr;
		private SbmTransactionMgr transactionMgr;
		private SbmAccountsDfn accountDfn = null;
		private List<SbmTransactionPayment> transactionPayments = new List<SbmTransactionPayment>();
		private readonly List<TypeCodeDesc> transactionTypes;
		private readonly List<TypeCodeDesc> transactionStatusCats;
		private readonly List<TypeCodeDesc> requirementStatusCats;
		private readonly List<TypeCodeDesc> constituentStatusCats;
		private readonly String statusCancelled = SacsSystem.GetStatusCode(SaStatus.Cancelled);

		//-------------------------------------------------------------------
		// Construction.
		public SbmTransaction_Dbas(SbmUserContext userContext, SysId id, SysId affIdOwner, SysId assocId, Sbm.TransactionType transactionType, ushort flags) :
			base(userContext, id, affIdOwner, assocId, transactionType)
		{
			this.userContext = userContext;
			transactionTypes = SbmSystem.GetCodesOfType(userContext, Sbm.SystemCode.TransactionType);
			transactionStatusCats = SbmSystem.GetCodesOfType(userContext, Sbm.SystemCode.TransactionStatusCat);
			requirementStatusCats = SbmSystem.GetCodesOfType(userContext, Sbm.SystemCode.RequirementStatusCat);
			constituentStatusCats = SbmSystem.GetCodesOfType(userContext, Sbm.SystemCode.ConstituentStatusCat);
			Flags = flags;
		}
		protected override void Dispose(bool disposing)
		{
			if (disposing)
			{
				if (accountMgr != null) accountMgr.Dispose();
				if (transactionMgr != null) transactionMgr.Dispose();
				if (dataItemMgr != null) dataItemMgr.Dispose();
				if (accountDfn != null) accountDfn.Dispose();
			}
			base.Dispose(disposing);
		}

		//-------------------------------------------------------------------
		// Properties.

		//-------------------------------------------------------------------
		// Utilities.
		public override bool IsReadOnly()
		{
			if (!SysId.IsValid(Id)) return false;
			bool bReadOnly = false;

			// Transaction can't be updated after it has been exporetd to an accounts system.
			if (!bReadOnly)
			{
				if (accountDfn == null) accountDfn = new SbmAccountsDfn(userContext);
				if (accountDfn != null)
				{
					if (accountDfn.IsTransactionTypeManagedByAccounts(TransactionType))
						bReadOnly = true;
				}
			}
			return bReadOnly;
		}
		public override bool DetailsAreReadOnly()
		{
			if (!SysId.IsValid(Id)) return false;
			if (IsReadOnly()) return true;            // If transaction is read only then details must be.
			bool detailsAreReadOnly = false;

			// User must be allowed to update transactions:
			if (!detailsAreReadOnly)
			{
				// ToDo UserCanUpdateItemType
				/*if (!pSys->UserCanUpdateItemType(eSapItemTypeTransaction))
					bDetailsAreReadOnly = true;*/
			}

			// Closed transactions.
			if (!detailsAreReadOnly)
			{
				if (TransactionStatusCat == SbmTransaction.StatusCat.Closed)
				{
					// Once the 'grace' period has passed, only the status can be modified.
					int graceDaysUpdateClosedTrans = Math.Max(0, userContext.GetOwnerOption_UpdateLimit(Sbm.OrgOption_PeriodDays.UpdateClosedTransaction, 0));
					DateTime closed = Closed;
					detailsAreReadOnly = (DateUtil.IsValid(closed) && closed <= DateTime.Today.AddDays(-graceDaysUpdateClosedTrans));
				}
			}

			return detailsAreReadOnly;
		}

		//-------------------------------------------------------------------
		// Internal Processing.
		public bool InitAccountMgr()
		{
			if (accountMgr == null)
				accountMgr = SbmGlobals.System.CreateAccountMgr(userContext);
			return (accountMgr != null);
		}
		public bool InitDataItemMgr()
		{
			if (dataItemMgr == null)
				dataItemMgr = SbmGlobals.System.CreateDataItemMgr(userContext);
			return (dataItemMgr != null);
		}
		public bool InitStockMgr()
		{
			if (stockMgr == null)
				stockMgr = SbmGlobals.System.CreateStockMgr(userContext);
			return (stockMgr != null);
		}
		public bool InitTransactionMgr()
		{
			if (transactionMgr == null)
				transactionMgr = SbmGlobals.System.CreateTransactionMgr(userContext);
			return (transactionMgr != null);
		}

		//-------------------------------------------------------------------
		// Associated data.
		public override bool IsReferencedByOtherTransactions()
		{
			ClearErrorState();
			InitTransactionMgr();
			return transactionMgr.TransactionIsReferencedByOtherTransactions(Id);
		}
		public override bool HasRequirements(SbmRequirement.StatusCat requirementStatusCat = SbmRequirement.StatusCat.NotDeleted)
		{
			return (GetRequirementCount(requirementStatusCat) > 0);
		}
		public override bool HasConstituents(SbmConstituent.StatusCat constituentStatusCat = SbmConstituent.StatusCat.NotDeleted)
		{
			ClearErrorState();
			InitTransactionMgr();
			return transactionMgr.TransactionHasConstituents(Id, constituentStatusCat);
		}
		public override bool HasContainerItems()
		{
			ClearErrorState();
			InitTransactionMgr();
			return transactionMgr.TransactionHasContainerItems(Id);
		}
		public override bool HasStockMovements()
		{
			ClearErrorState();
			InitTransactionMgr();
			return transactionMgr.TransactionHasStockMovements(Id);
		}
		public override bool HasPendingStockMovements()
		{
			ClearErrorState();
			InitTransactionMgr();
			return transactionMgr.TransactionHasPendingStockMovements(Id);
		}
		public override bool HasDiaryLinks()
		{
			if (!SysId.IsValid(Id)) return false;
			/*SbmDiaryConsole diaryConsole = SbmGlobals.Application.GetDiaryConsole(SessionContext);
			if (diaryConsole != null)
				diaryConsole.DataItemHasLinks((short)Sbm.ItemType.Transaction, Id);*/
			return false;
		}
		//public override void SetDefaults(class SbmRequirement *) const;
		public override long GetRequirementCount(SbmRequirement.StatusCat requirementStatusCat = SbmRequirement.StatusCat.Any)
		{
			ClearErrorState();
			if (!SysId.IsValid(Id)) return 0;
			ISacsDatabase db = SbmGlobals.Application.GetDatabase(userContext.SessionContext);
			if (db != null)
			{
				List<String> filter = new List<String>();
				filter.Add(SbmDbDfn.GetColumnNameQual(SbmDbDfn.ColumnIdx.Requirement_TransId) + "=" + Id.ToString());
				if (requirementStatusCat == SbmRequirement.StatusCat.NotCancelled)
					filter.Add(SbmDbDfn.GetColumnNameQual(SbmDbDfn.ColumnIdx.Requirement_Status) + "<>'" + statusCancelled + "'");
				else if (requirementStatusCat > 0)
					filter.Add(SbmDbDfn.GetColumnNameQual(SbmDbDfn.ColumnIdx.Requirement_StatusCat) + "='" + requirementStatusCats.GetCodeForType(requirementStatusCat) + "'");
				return db.GetRowCount(SbmDbDfn.GetTableName(SbmDbDfn.TableIdx.Requirement), filter.Concat(" AND ", "(", ")"));
			}
			else SetErrorState("database is not available");
			return 0;
		}
		public override List<SbmRequirement> GetRequirements(SbmRequirement.StatusCat requirementStatusCat = SbmRequirement.StatusCat.Any)
		{
			if (SysId.IsValid(Id) && InitTransactionMgr())
			{
				// Retrieve the current set of requirements for this transaction.
				SbmRequirement.Params prmRequirement = new SbmRequirement.Params();
				//prmRequirement.RequirementStatusCat = requirementStatusCat;
				prmRequirement.TransIncludedIds.Add(Id);
				return transactionMgr.GetRequirementList(prmRequirement);
			}
			return new List<SbmRequirement>();
		}
		public override bool ItemsRequireJobNumber()
		{
			// Check whether Job Number should be allocated:
			SbmConfigConsole configConsole = SbmGlobals.GetConfigConsole(userContext.SessionContext);
			if (configConsole != null && configConsole.AllowOption(UserContext, Sbm.ConfigOption.SalesOrderItemJobNumber) && SbmGlobals.Application.ColumnExists(userContext.SessionContext, SbmDbDfn.ColumnIdx.Requirement_JobNumber))
				return TransactionType == Sbm.TransactionType.SalesOrder;
			return false;
		}
		public override bool UpdateRequirements(List<SbmRequirement> requirements)
		{
			if (this == null) return false;
			ClearErrorState();
			SacsDatabase db = SbmGlobals.Application.GetDatabase(userContext.SessionContext) as SacsDatabase;
			if (db == null) return SetErrorState("Database not available");
			if (!SysId.IsValid(Id)) return SetErrorState("transaction does not exist");
			if (!InitTransactionMgr()) return SetErrorState("requirement manager is not available");
			// Verify requirements list.
			if (!HasErrorState())
			{
				// Validate the identity of each each requirement in the list.
				foreach (SbmRequirement requirement in requirements)
				{
					if (requirement == null) continue;
					if (SysId.IsValid(requirement.AssociationId) && requirement.AssociationId != AssociationId)
					{
						SetErrorState("Invalid requirement in list: doesn't belong to association.");
					}
					else if (SysId.IsValid(requirement.TransactionId) && requirement.TransactionId != Id)
					{
						SetErrorState("Invalid requirement in list: doesn't belong to transaction.");
					}
				}
			}
			// Set identity for each requirements in the list.
			if (!HasErrorState())
			{
				// Set the sequence and identity against each requirement in the list.
				for (int requirementIdx = 0; requirementIdx < requirements.Count; requirementIdx++)
				{
					SbmRequirement requirement = requirements[requirementIdx];
					requirement.Seq = (short)(requirementIdx + 1);
					requirement.AssociationId = AssociationId;
					requirement.TransactionId = Id;
					if (ItemsRequireJobNumber() && StringUtil.IsEmpty(requirement.JobNumber))
					{
						String jobNumberNextIdObject = "JobNumber:" + SysId.ToString(userContext.Organisation.AffiliateId);
						/*
						// Check for original Job Number 'NextId' key and convert to organisation specific.
						String filter = SbmDbDfn.GetColumnName(SbmDbDfn.ColumnIdx.NextId_Object) + "='JobNumber'";
						if (db.GetRowCount(SbmDbDfn.GetTableName(SbmDbDfn.TableIdx.NextId), filter) > 0)
						{
							String query =
								"Begin Transaction;\n" + "Update dbo.NextId Set Object='" + jobNumberNextIdObject + "' Where " + filter + ";\n" + "Commit Transaction;\n";
							db.ExecuteQuery(query);
						}
						*/
						String jobNumber = SysId.ToString(db.GetNextId(jobNumberNextIdObject, userContext.DbUpdateInfo, false));
						requirement.JobNumber = "";
					}
					SetDefaults(requirement);
				}
			}

			// Make a copy of the list (pointers only) to keep track of those requirements in the list that have not been updated against the database.
			List<SbmRequirement> requirementsNotUpdated = new List<SbmRequirement>(requirements);
			// Retrieve each of the requirements currently specified for this transaction in turn.
			List<SysId> requirementIdsUpdated = new List<SysId>();
			if (!HasErrorState() && InitTransactionMgr())
			{
				List<ColumnDfn> columnsQuery = new List<ColumnDfn>();
				String colRequirement_Id = SbmDbDfn.GetColumnName(SbmDbDfn.ColumnIdx.Requirement_Id);
				SbmRequirement.Params prmRequirement = new SbmRequirement.Params();
				prmRequirement.TransIncludedIds.Add(Id);
				using (DbResultSet dbResultSet = transactionMgr.ExecuteRequirementQuery(columnsQuery, prmRequirement))
				{
					while (!HasErrorState() && dbResultSet != null && dbResultSet.NextRecord())
					{
						NamedValue.Map values = dbResultSet.GetRecordValues();
						SysId requirementId = new SysId((int)values.GetValue(colRequirement_Id).AsLong());
						// Does this requirement exist in the list.
						if (requirementsNotUpdated.ExistsById(requirementId))
						{
							// Requirement still in list - update the details.
							SbmRequirement requirement = requirementsNotUpdated[0];
							if (transactionMgr.UpdateRequirement(requirement, userContext.DbUpdateInfo))
							{
								if (!requirement.CommitAssociatedData())
									SetErrorState("Failed to update requirement's data: " + requirement.ErrorState);
							}
							else SetErrorState("Failed to update requirement: " + transactionMgr.ErrorState);
							requirementsNotUpdated.Remove(requirement);
						}
						else
						{
							// Requirement not in list - remove it.
							SbmRequirement requirement = transactionMgr.GetRequirement(prmRequirement);
							if (requirement != null)
							{
								if (!transactionMgr.DeleteRequirement(requirement, TransactionType, userContext.DbUpdateInfo))
									SetErrorState("Failed to remove requirement: " + transactionMgr.ErrorState);
							}
							else SetErrorState("Failed to retrieve requirement for deletion: " + transactionMgr.ErrorState);
						}
					}
				}
			}

			// Any requirements left in the 'Not Updated' list must be new.
			foreach (SbmRequirement requirementNotUpdate in requirementsNotUpdated)
			{
				if (requirementNotUpdate != null)
				{
					if (!SysId.IsValid(requirementNotUpdate.Id))
					{
						// Requirement does not yet exist - create it:
						if (transactionMgr.InsertRequirement(requirementNotUpdate, userContext.DbUpdateInfo))
						{
							if (!requirementNotUpdate.CommitAssociatedData())
								SetErrorState("Failed to update requirement's data: " + requirementNotUpdate.ErrorState);
						}
						else SetErrorState("Failed to create requirement: " + transactionMgr.ErrorState);
					}
				}
				else SetErrorState("null item in list");
				requirementsNotUpdated = null;
			}
			// Clean-up:
			requirementsNotUpdated.Clear();
			return !HasErrorState();
		}
		public override bool CommitAssociatedData()
		{
			ClearErrorState();
			if (this == null || !SysId.IsValid(Id)) return false;
			if (!HasErrorState()) CommitPayments();
			return !HasErrorState();
		}
		public override bool ClearDependentData()
		{
			ClearErrorState();
			if (!SysId.IsValid(Id)) return false;
			ISacsDatabase db = SbmGlobals.Application.GetDatabase(userContext.SessionContext);
			if (db != null)
			{
				if (!HasErrorState())
				{
					// Delete interface data items.
					SaInterfaceConsole interfaceConsole = SbmGlobals.Application.GetInterfaceConsole(userContext);
					if (interfaceConsole != null)
					{
						if (!interfaceConsole.ClearInterfaceDataItems(new ItemId((short)Sbm.ItemType.Transaction, Id), userContext.DbUpdateInfo))
							SetErrorState("Failed to clear interface data items - " + interfaceConsole.ErrorState);
					}
					else SetErrorState("Failed to retrieve interface console");
					interfaceConsole = null;   // Do not delete this global object.
				}
				if (!HasErrorState())
				{
					/* ToDo itemDocConsole > Remove document references.
					SaItemDocConsole itemDocConsole = SbmGlobals.Application.GetItemDocConsole(SessionContext);
					if (itemDocConsole != null)
					{
						if (!itemDocConsole.ClearItemDocs(Sbm.ItemType.Transaction, Id))
							SetErrorState(itemDocConsole.ErrorState());
					}
					else SetErrorState("Failed to retrieve item document console");
					itemDocConsole = null;   // Do not delete this global object.*/
				}
				// Delete any associated items links.
				if (!HasErrorState())
				{
					if (InitDataItemMgr())
					{
						if (!dataItemMgr.ClearDataItem(Sbm.ItemType.Transaction, Id))
							SetErrorState("failed to clear transaction item links");
					}
					else SetErrorState("failed to initialise data item manager");
				}
				// Delete any constituents that belong to this Transaction.
				if (!HasErrorState())
				{
					String filter = SbmDbDfn.GetColumnName(SbmDbDfn.ColumnIdx.Constituent_TransId) + "=" + Id.ToString();
					if (db.ExecuteDelete(SbmDbDfn.GetTableName(SbmDbDfn.TableIdx.Constituent), filter) > 0)
						SetErrorState("failed to clear Transaction constituents");
				}
				// Clear requirements.
				if (!HasErrorState() && InitTransactionMgr())
				{
					List<SbmRequirement> requirements = GetRequirements();
					if (requirements != null && requirements.Count > 0)
					{
						foreach (SbmRequirement requirement in requirements)
						{
							if (!transactionMgr.DeleteRequirement(requirement, TransactionType, userContext.DbUpdateInfo))
								SetErrorState(transactionMgr.ErrorState.ToString());
							requirements = null;
						}
					}
					if (requirements != null) requirements.Clear();
				}
				// Clear addresses.
				if (!HasErrorState() && InitAccountMgr())
				{
					if (!accountMgr.ClearAddressesFor(Sbm.ItemType.Transaction, new ItemId()))
						SetErrorState("failed to clear addresses - " + accountMgr.ErrorState);
				}
				// Clear any references to this transaction from other transactions:
				if (!HasErrorState())
				{
					String filter = SbmDbDfn.GetColumnName(SbmDbDfn.ColumnIdx.Transaction_TransIdSource) + "=" + Id.ToString();
					List<StringPair> values = new List<StringPair>();
					SacsDatabase.AddValuePair(values, SbmDbDfn.GetColumnName(SbmDbDfn.ColumnIdx.Transaction_TransIdSource), "0", false);
					db.ExecuteUpdate(SbmDbDfn.GetTableName(SbmDbDfn.TableIdx.Transaction), values, filter);
					SetErrorState("failed to clear Transaction references");
				}
			}
			else SetErrorState("database is unavailable");
			return !HasErrorState();
		}
		public override bool HasPayments()
		{
			if (transactionPayments != null) return true;
			else if (SysId.IsValid(Id) && InitDataItemMgr() && dataItemMgr != null)
			{
				SbmItemLink.Params prmItemLink = new SbmItemLink.Params
				{
					ItemLinkType = Sbm.ItemLinkType.Transaction_Payment,
					ItemTypeFrom = Sbm.ItemType.Transaction,
					ItemIdFrom = Id
				};
				foreach (SbmItemLink itemLink in dataItemMgr.GetItemLinkList(prmItemLink))
					if (itemLink != null) return true;
			}
			return false;
		}
		public override List<SbmTransactionPayment> GetPayments()
		{
			List<SbmTransactionPayment> transactionPaymentsCopy = new List<SbmTransactionPayment>();
			if (transactionPayments == null && SysId.IsValid(Id) && InitDataItemMgr() && dataItemMgr != null)
			{
				SbmItemLink.Params prm = new SbmItemLink.Params();
				prm.ItemLinkType = Sbm.ItemLinkType.Transaction_Payment;
				prm.ItemTypeFrom = Sbm.ItemType.Transaction;
				prm.ItemIdFrom = Id;
				List<SbmItemLink> itemLinks = dataItemMgr.GetItemLinkList(prm);
				if (itemLinks != null)
				{
					foreach (SbmItemLink itemLink in itemLinks)
					{
						if (itemLink == null) continue;
						SbmTransactionPayment transactionPayment = new SbmTransactionPayment(UserContext, itemLink.DataContent);
						transactionPayment.Notes = itemLink.Notes;
						transactionPayment.Changed = false;
						if (transactionPayments == null) transactionPayments = new List<SbmTransactionPayment>();
						transactionPayments.Add(transactionPayment);
					}
					// Clean-up.
					itemLinks.Clear();
				}
			}
			// Clone the list.
			transactionPaymentsCopy = transactionPayments.Clone();
			transactionPaymentsCopy.Sort();
			return transactionPaymentsCopy;
		}

		public override bool SetPayments(List<SbmTransactionPayment> transactionPaymentsNew)
		{
			// Clear the existing list:
			if (transactionPayments != null) transactionPayments.Clear();
			// Copy all items from the specified list:
			transactionPayments = transactionPaymentsNew.Clone();
			return true;
		}
		public override bool CommitPayments()
		{
			ClearErrorState();
			// Do not attempt any updates unless the list has been populated.
			if (transactionPayments != null && SysId.IsValid(Id) && InitDataItemMgr() && dataItemMgr != null)
			{
				// Build an item link list corresponding to the list of payment:
				List<SbmItemLink> itemLinks = new List<SbmItemLink>();

				foreach (SbmTransactionPayment transactionPayment in transactionPayments)
				{
					if (transactionPayment == null) continue;
					SbmItemLink itemLink = dataItemMgr.CreateItemLink(Sbm.ItemLinkType.Transaction_Payment, Sbm.ItemType.Transaction, Id, Sbm.ItemType.Unknown, new SysId(0));
					if (itemLink != null)
					{
						itemLink.Seq = (short)transactionPayment.CodeSeq;
						itemLink.DataContent = transactionPayment.ToString();
						itemLink.Notes = transactionPayment.Notes;
						itemLinks.Add(itemLink);
						itemLink = null;  // Now owned by the list.
					}
				}
				// Store these details:
				if (dataItemMgr.StoreFromItemLinks(Sbm.ItemLinkType.Transaction_Payment, Sbm.ItemType.Transaction, Id, itemLinks, userContext.DbUpdateInfo))
				{
				}
				else
				{
					SetErrorState("Failed to save transaction payment item links - " + dataItemMgr.ErrorState);
				}
				if (itemLinks != null)
					itemLinks.Clear();
			}
			return false;
		}

	}
	//=======================================================================
}