using Sarand.BusinessMgr.Net.Standard.Base.App;
using Sarand.BusinessMgr.Net.Standard.Base.Bus;
using Sarand.BusinessMgr.Net.Standard.Dbas.Bus;
using Sarand.BusinessMgr.Net.Standard.Dbas.Internal;
using Sarand.BusinessMgr.Net.Standard.Dbas.UpdateLog;
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.Utils;
using Sarand.Net.Standard.Dbas.Data;
using System;
using System.Collections.Generic;
using System.Data.Common;
using System.Linq;

namespace Sarand.BusinessMgr.Net.Standard.Dbas.Mgr
{
	//=======================================================================
	// Data Item Manager - Item Links - Utils.
	//=======================================================================
	partial class SbmDataItemMgr_Dbas
	{
		//-------------------------------------------------------------------
		// Utilities.

		private List<StringPair> GetLogProperties(SbmItemLink itemLink)
		{
			return new List<StringPair>()
			{
				new StringPair("Id",SysId.ToString(itemLink.Id)),
				new StringPair("DataContent",itemLink.DataContent),
				new StringPair("Status",itemLink.StatusCode)
			};
		}

		//-------------------------------------------------------------------

		public override bool DoDbCleanup()
		{
			ClearErrorState();
			/*RS_ItemLink* prsLink = (pSys ? pSys.ItemLinkRecordSet() : NULL);
			if (!prsLink) return SetException("failed to create ItemLink recordset");
			if (!HasException())
			{
				//---------------------------------------------------------------
				// Jan10: Item Links with Seq=0.
				// These are prohibiting the primary key that includes this column.
				// Should be able to set the value in sequence for the parent ('From') item.
				//---------------------------------------------------------------
				// Keep track of previous values:
				eSapItemLinkType eLinkTypePrev = eSapItemLink_Unknown;
				eSapItemType eTypeFromPrev = eSapItemTypeUnknown;
				SaSysId itemIdFromPrev;
				int iNextSeq = 1;
				int iRowsModified = 0, iParentItemsFound = 0;

				// Restrict to Seq=0 and sort by parent item:
				prsLink->AddToSort(SbmDbDfn.GetColumnName(SbmDbDfn.ColumnIdx.ItemLink_Type, false));
				prsLink->AddToSort(SbmDbDfn.GetColumnName(SbmDbDfn.ColumnIdx.ItemLink_ItemTypeFrom, false));
				prsLink->AddToSort(SbmDbDfn.GetColumnName(SbmDbDfn.ColumnIdx.ItemLink_ItemIdFrom, false));
				prsLink->AddToFilter(SbmDbDfn.GetColumnName(SbmDbDfn.ColumnIdx.ItemLink_Seq) + "=0");
				prsLink->Open();
				while (!HasException() && prsLink->IsOpen() && !prsLink->IsEOF())
				{
					// Reset the sequence if the parent item has changed:
					if (eLinkTypePrev != (eSapItemLinkType)prsLink->iType || eTypeFromPrev != (eSapItemType)prsLink->iItemTypeTo || itemIdFromPrev != prsLink->iItemIdTo)
					{
						iNextSeq = 1;
						eLinkTypePrev = (eSapItemLinkType)prsLink->iType;
						eTypeFromPrev = (eSapItemType)prsLink->iItemTypeTo;
						itemIdFromPrev = prsLink->iItemIdTo;
						iParentItemsFound++;
					}
					prsLink->Edit();
					prsLink->iSeq = iNextSeq++;
					if (!prsLink->Update())
						SetException("failed to update link (" + prsLink->Exception() + ")");
					iRowsModified++;
					// Move to the next record in the result set:
					prsLink->MoveNext();
				}
				SATRACE("\nSapDataItemMgr_Odbc::DoDbCleanup\n\tParent items found: " + String(iParentItemsFound) + "\n\tRows modified: " + String(iRowsModified) + "\n\n");
				//---------------------------------------------------------------
			}*/
			return !HasErrorState();
		}

		//-------------------------------------------------------------------

		public override bool ClearDataItem(Sbm.ItemType itemType, SysId itemId)
		{
			ClearErrorState();
			if ((int)itemType < 1 || !SysId.IsValid(itemId)) return false;
			List<String> filters = new List<String>();
			String colItemTypeFrom = SbmDbDfn.GetColumnName(SbmDbDfn.ColumnIdx.ItemLink_ItemTypeFrom);
			String colItemIdFrom = SbmDbDfn.GetColumnName(SbmDbDfn.ColumnIdx.ItemLink_ItemIdFrom);
			String colItemTypeTo = SbmDbDfn.GetColumnName(SbmDbDfn.ColumnIdx.ItemLink_ItemTypeTo);
			String colItemIdTo = SbmDbDfn.GetColumnName(SbmDbDfn.ColumnIdx.ItemLink_ItemIdTo);
			filters.Add(colItemTypeFrom + "=" + ((int)itemType).ToString() + " AND " + colItemIdFrom + "=" + itemId.ToString());
			filters.Add(colItemTypeTo + "=" + ((int)itemType).ToString() + " AND " + colItemIdTo + "=" + itemId.ToString());
			String filter = filters.Concat(" OR ", "(", ")");
			//return Database.ExecuteDelete("DELETE FROM" + SbmDbDfn.GetTableName(SbmDbDfn.TableIdx.ItemLink) + " WHERE " + filter);
			Database.ExecuteDelete(SbmDbDfn.GetTableName(SbmDbDfn.TableIdx.ItemLink), filter);
			return false;
		}

		//-------------------------------------------------------------------
		// Associated items.
		public override bool UpdateLinkedItems(Sbm.AssociatedItemMode itemMode, Sbm.ItemLinkType itemLinkType, ref ItemId itemIdParent, ref ItemId itemIdChild, ItemId itemId, List<SbmItemLink> itemLinks)
		{
			ClearErrorState();
			// If the fixed item hasn't previously been specified, store the value now.
			if (ItemLinkParentIsFixed(itemMode) && itemIdParent.Type == itemId.Type && !SysId.IsValid(itemIdParent.Id))
				itemIdParent = itemId;
			else if (ItemLinkChildIsFixed(itemMode) && itemIdChild.Type == itemId.Type && !SysId.IsValid(itemIdChild.Id))
				itemIdChild = itemId;
			// Validate the configuration.
			if (ItemLinkConfigIsValid(itemMode, itemLinkType))
				return SetErrorState("Invalid configuration for associated items");

			// Validate fixed item:
			if (ItemLinkParentIsFixed(itemMode))
			{
				if (itemIdParent != itemId)
					return SetErrorState("Inconsistent parent item specified");
			}
			else if (ItemLinkChildIsFixed(itemMode))
			{
				if (itemIdChild != itemId)
					return SetErrorState("Inconsistent child item specified");
			}

			if (ItemLinkParentIsFixed(itemMode))
			{
				// Parent item is fixed - update its child items as specified in the list:
				if (itemLinks != null) itemLinks.SetSequences();
				if (!DataItemMgr.StoreFromItemLinks(itemLinkType, itemId, itemLinks, DbUpdateInfo))
					return SetErrorState($"Failed to store associated items - {DataItemMgr.ErrorStateMessage}");
			}
			else if (ItemLinkChildIsFixed(itemMode))
			{
				// Child item is fixed - update its parent items as specified in the list:
				if (!DataItemMgr.StoreToItemLinks(itemLinkType, itemId, itemLinks, DbUpdateInfo))
					return SetErrorState($"Failed to store associated items - {DataItemMgr.ErrorStateMessage}");
			}

			return !HasErrorState();
		}

		//-------------------------------------------------------------------
	}
	//=======================================================================
}