using System;
using System.Collections.Generic;
using System.Data.Common;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Sarand.Core.App;
using Sarand.Core.Base;
using Sarand.Core.Bus;
using Sarand.Core.Dbas.Base;
using Sarand.Win.Dbas.Base;
using Sarand.PatientMgr.Core.App;
using Sarand.PatientMgr.Core.Bus;
using Sarand.PatientMgr.Core.Mgr;
using Sarand.PatientMgr.Win.Dbas.Bus;
using Sarand.PatientMgr.Win.Dbas.Internal;
//using Sarand.PatientMgr.Win.Dbas.UpdateLog;
using Sarand.Win.Dbas.Data;

namespace Sarand.PatientMgr.Win.Dbas.Mgr
{
	//=======================================================================
	internal partial class SpmInstitutionMgr_Dbas : SpmInstitutionMgr
	{
		//*******************************************************************
		//                       I n s t i t u t i o n
		//*******************************************************************
		// Utilities.

		//-------------------------------------------------------------------
		// Create Institution.
		public override SpmInstitution CreateInstitution ()
		{
			return new SpmInstitution_Dbas(UserContext, null, 0);
		}
		private SpmInstitution_Dbas CreateInstitution (SwmInstitution_Db dbInstitution)
		{
			ClearErrorState();
			SpmInstitution_Dbas institution = new SpmInstitution_Dbas(UserContext, new SysId(dbInstitution._Id), (ushort)dbInstitution._Flags);
			PopulateFrom(dbInstitution, institution);
			return institution;
		}

		//-------------------------------------------------------------------
		// Get Institution.
		public override SpmInstitution GetInstitution ()
		{
			ClearErrorState();
			SpmInstitution.Params prmInstitution = new SpmInstitution.Params();
			prmInstitution.StatusCat = SpmInstitution.StatusCat.Any;
			if (GetInstitutionCount(prmInstitution) == 0)
			{
				SetErrorState("No institution available.");
				Logger.Warn("GetInstitution " + ErrorStateMessage);
				return null;
			}
			if (GetInstitutionCount(prmInstitution) > 1)
			{
				SetErrorState("Multiple institutions available.");
				Logger.Warn("GetInstitution " + ErrorStateMessage);
				return null;
			}
			return GetInstitution(prmInstitution);
		}
		public override SpmInstitution GetInstitution (SpmInstitution.Params prm)
		{
			return GetInstitution(GetInstitutionQueryFilter(prm).Concat(" AND ", "(", ")"));
		}
		private SpmInstitution GetInstitution (String filter)
		{
			ClearErrorState();
			long count = GetInstitutionCount(filter);
			if (count == 0) return null;
			if (count != 1)
			{
				SetErrorState("Multiple Institutiones found");
				return null;
			}
			SpmInstitution institution = null;
			// Query data.
			using (var dbConnection = Database.CreateConnection())
			using (var dbCommand = dbConnection.CreateCommand())
			{
				try
				{
					dbConnection.Open();
					SwmInstitution_Db dbInstitution = new SwmInstitution_Db(DbInfo);
					dbInstitution.PopulateFrom(dbCommand, aliasInstitution, filter);
					institution = CreateInstitution(dbInstitution);
				}
				catch (Exception exc)
				{
					SetErrorState("Database query exception");
					Logger.Warn(GetType().Name + ".GetInstitution\n\tQuery: " + dbCommand.CommandText + "\n\tException: " + exc.Message);
				}
			}
			return institution;
		}

		//-------------------------------------------------------------------
		// Validate Institution.
		public override bool IsValidInstitutionData (SpmInstitution.Data data, SpmInstitution.ErrField errField)
		{
			ClearErrorState();
			if (!base.IsValidInstitutionData(data, errField)) return false;
			return true;
		}

		//-------------------------------------------------------------------
		// Insert Institution.
		public override bool InsertInstitution (SpmInstitution institution, DbUpdateInfo dbUpdateInfo)
		{
			ClearErrorState();
			if (!IsValidInstitution(institution)) return false;
			if (SysId.IsValid(institution.Id)) return SetErrorState(ErrorMessage.ValiditemId);
			using (var dbConnection = Database.CreateConnection())
			using (var dbCommand = dbConnection.CreateCommand())
			{
				try
				{
					dbConnection.Open();
					SwmInstitution_Db dbInstitution = new SwmInstitution_Db(DbInfo);
					PopulateTo(dbInstitution, institution, dbUpdateInfo);
					if (SwmInstitution_Db.FieldsNonId.Contains("Id"))
					{
						// Generate next Id.
						dbInstitution._Id = SysId.ToInt(Database.GetNextId("Institution", dbUpdateInfo));
					}
					dbInstitution.ExecuteInsertCommand(dbCommand);
					institution.Id = new SysId(dbInstitution._Id);
				}
				catch (Exception exc) { SetErrorState(exc.Message); }
			}
			return !HasErrorState();
		}

		//-------------------------------------------------------------------
		// Update Institution.
		public override bool UpdateInstitution (SpmInstitution institution, DbUpdateInfo dbUpdateInfo)
		{
			ClearErrorState();
			if (!IsValidInstitution(institution)) return false;
			if (!SysId.IsValid(institution.Id)) return SetErrorState(ErrorMessage.InvalidItemId);
			using (var dbConnection = Database.CreateConnection())
			using (var dbCommand = dbConnection.CreateCommand())
			{
				try
				{
					// Retrieve Institution.
					dbConnection.Open();
					SwmInstitution_Db dbInstitution = new SwmInstitution_Db(DbInfo);
					dbInstitution.PopulateFrom(dbCommand, aliasInstitution, "Id=" + SysId.ToString(institution.Id));
					//SpmUpdateLogItemMonitor_Institution updateLogMonitor = new SpmUpdateLogItemMonitor_Institution(UserContext, CreateInstitution(dbInstitution));

					// Update properties.
					PopulateTo(dbInstitution, institution, dbUpdateInfo);
					dbInstitution.ExecuteUpdateCommand(dbCommand);

					/* Record updates.
					updateLogMonitor.RecordUpdatedValues(institution);
					updateLogMonitor.LogUpdates();*/
				}
				catch (Exception exc) { SetErrorState(exc.Message); }
			}
			return !HasErrorState();
		}

		//-------------------------------------------------------------------
		// Delete Institution.
		public override bool InstitutionCanBeDeleted (SpmInstitution institution)
		{
			ClearErrorState();
			if (!base.InstitutionCanBeDeleted(institution)) return false;
			return true;
		}
		public override bool DeleteInstitution (SpmInstitution institution, DbUpdateInfo dbUpdateInfo)
		{
			ClearErrorState();
			if (!InstitutionCanBeDeleted(institution)) return false;
			using (var dbConnection = Database.CreateConnection())
			using (var dbCommand = dbConnection.CreateCommand())
			{
				try
				{
					// Retrieve Institution.
					dbConnection.Open();
					SwmInstitution_Db dbInstitution = new SwmInstitution_Db(DbInfo);
					dbInstitution.PopulateFrom(dbCommand, aliasInstitution, "Id=" + institution.Id.ToString());
					// Delete Institution.
					dbCommand.CommandType = System.Data.CommandType.Text;
					dbCommand.CommandText = "DELETE FROM " + SpmDbDfn.GetTableName(SpmDbDfn.TableIdx.SwmInstitution) + " WHERE Id=" + SysId.ToString(institution.Id) + ";";
					dbCommand.ExecuteNonQuery();
				}
				catch (Exception exc) { SetErrorState(exc.Message); }
			}
			return !HasErrorState();
		}

		//-------------------------------------------------------------------
		// Copy data properties to and from database.
		private void PopulateTo (SwmInstitution_Db dbInstitution, SpmInstitution institution, DbUpdateInfo dbUpdateInfo)
		{
			dbInstitution._Id = institution.Id.ToInt();
			dbInstitution._Name = institution.Name;

			dbInstitution._Notes = institution.Notes;
			dbInstitution._Status = SacsSystem.GetStatusCode(institution.Status);
			dbInstitution._Flags = (short)institution.Flags;
			if (!SysId.IsValid(institution.Id))
			{
				dbInstitution._CreateOn = DateTime.UtcNow;
				dbInstitution._CreateBy = dbUpdateInfo.UserId.ToInt();
				dbInstitution._CreateHost = dbUpdateInfo.Host;
			}
			dbInstitution._UpdateOn = DateTime.UtcNow;
			dbInstitution._UpdateBy = dbUpdateInfo.UserId.ToInt();
			dbInstitution._UpdateHost = dbUpdateInfo.Host;
		}
		private void PopulateFrom (SwmInstitution_Db dbInstitution, SpmInstitution institution)
		{
			institution.Id = new SysId(dbInstitution._Id);
			institution.Name = dbInstitution._Name;

			institution.Notes = dbInstitution._Notes;
			institution.Status = SacsSystem.GetStatusForCode(dbInstitution._Status);
			institution.SetCreateStamp(dbInstitution._CreateOn, new SysId(dbInstitution._CreateBy), dbInstitution._CreateHost);
			institution.SetUpdateStamp(dbInstitution._UpdateOn, new SysId(dbInstitution._UpdateBy), dbInstitution._UpdateHost);
			institution.AcceptChanges();
		}

		//-------------------------------------------------------------------
		// Institution column definitions.
		private static readonly String aliasInstitution = "aInst";
		private void SetInstitutionColDfn
			(ColumnDfn col, String caption, int width, SpmDbDfn.ColumnIdx dbCol,
			ColumnAlignment align = ColumnAlignment.Default, DataValue.DataType dataType = DataValue.DataType.String,
			String alias = "", String prefix = "")
		{
			if (String.IsNullOrEmpty(alias) && SpmDbDfn.GetTableForColumn(dbCol) == SpmDbDfn.TableIdx.SwmInstitution)
				alias = aliasInstitution;
			col.Set(caption, width, (int)dbCol, prefix + SpmDbDfn.GetColumnName(dbCol, false), SpmDbDfn.GetColumnNameQual(dbCol, alias), dataType, align);
			if (dataType == DataValue.DataType.String && dbCol != SpmDbDfn.ColumnIdx.Unknown)
				col.MaxLength = (int)SpmDbDfn.GetColTextLen(dbCol);
		}
		//-------------------------------------------------------------------
		// Getting prmInstitution column definition.
		public override ColumnDfn GetInstitutionColumnDfn (SpmInstitution.Column columnId, string caption = "", int width = 0)
		{
			ColumnDfn columnDfn = new ColumnDfn((int)columnId, caption, width);
			switch (columnId)
			{
				case SpmInstitution.Column.Pos:
					SetInstitutionColDfn(columnDfn, "Pos", 42, SpmDbDfn.ColumnIdx.Unknown, ColumnAlignment.Right);
					columnDfn.SortMode = ColumnDfn.ColumnSortMode.Off;
					columnDfn.ReadOnly = true;
					columnDfn.Resizable = false;
					break;
				case SpmInstitution.Column.Id:
					SetInstitutionColDfn(columnDfn, "Id", 40, SpmDbDfn.ColumnIdx.SwmInstitution_Id, ColumnAlignment.Right, DataValue.DataType.Long, aliasInstitution);
					columnDfn.ReadOnly = true;
					break;

				// Institution Properties.
				case SpmInstitution.Column.Name:
					SetInstitutionColDfn(columnDfn, "Name", 60, SpmDbDfn.ColumnIdx.SwmInstitution_Name, ColumnAlignment.Default, DataValue.DataType.String, aliasInstitution);
					break;

				// Common properties.
				case SpmInstitution.Column.Notes:
					SetInstitutionColDfn(columnDfn, "Notes", 200, SpmDbDfn.ColumnIdx.SwmInstitution_Notes);
					break;
				case SpmInstitution.Column.Status:
					SetInstitutionColDfn(columnDfn, "Status", 50, SpmDbDfn.ColumnIdx.SwmInstitution_Status, ColumnAlignment.Center);
					break;
				case SpmInstitution.Column.Status_Desc:
					SetInstitutionColDfn(columnDfn, "Status", 50, SpmDbDfn.ColumnIdx.SwmInstitution_Status, ColumnAlignment.Center);
					break;
				case SpmInstitution.Column.Status_Ind:
					SetInstitutionColDfn(columnDfn, "Status", 50, SpmDbDfn.ColumnIdx.SwmInstitution_Status, ColumnAlignment.Center, DataValue.DataType.TriState);
					columnDfn.TriStateFormat = ColumnTriStateFormat.Lights;
					break;
				case SpmInstitution.Column.CreateOn_Date:
					SetInstitutionColDfn(columnDfn, "Created", 65, SpmDbDfn.ColumnIdx.SwmInstitution_CreateOn, ColumnAlignment.Center, DataValue.DataType.Date);
					columnDfn.ReadOnly = true;
					break;
				case SpmInstitution.Column.UpdateOn_Date:
					SetInstitutionColDfn(columnDfn, "Updated", 65, SpmDbDfn.ColumnIdx.SwmInstitution_UpdateOn, ColumnAlignment.Center, DataValue.DataType.Date);
					columnDfn.ReadOnly = true;
					break;
			}
			if (!String.IsNullOrEmpty(caption))
				columnDfn.Caption = caption;
			if (width > 0)
				columnDfn.Width = width;
			return columnDfn;
		}

		//-------------------------------------------------------------------
		// Institution query filter.
		public override List<string> GetInstitutionQueryFilter (SpmInstitution.Params prm)
		{
			List<String> filter = new List<String>();

			// Institution Id.
			String includedIds = prm.IncludedIds.Concat(",");
			if (!includedIds.IsEmpty())
				filter.Add(SpmDbDfn.GetColumnNameQual(SpmDbDfn.ColumnIdx.SwmInstitution_Id, aliasInstitution) + " IN (" + includedIds + ")");
			String excludedIds = prm.ExcludedIds.Concat(",");
			if (!excludedIds.IsEmpty())
				filter.Add(SpmDbDfn.GetColumnNameQual(SpmDbDfn.ColumnIdx.SwmInstitution_Id, aliasInstitution) + " NOT IN (" + excludedIds + ")");

			// Name.
			String colInstitution_Name = SpmDbDfn.GetColumnNameQual(SpmDbDfn.ColumnIdx.SwmInstitution_Name, aliasInstitution);
			if (!StringUtil.IsEmpty(prm.Name))
				filter.Add(colInstitution_Name + "='" + DbQuery.FormatForCondition(prm.Name) + "'");
			if (!StringUtil.IsEmpty(prm.NamePartial))
				filter.Add(colInstitution_Name + " LIKE '%" + DbQuery.FormatForLike(prm.NamePartial) + "%'");

			// Notes.	
			String colInstitution_Notes = SpmDbDfn.GetColumnNameQual(SpmDbDfn.ColumnIdx.SwmInstitution_Notes, aliasInstitution);
			if (!StringUtil.IsEmpty(prm.NotesPartial))
				filter.Add(colInstitution_Notes + " LIKE '%" + DbQuery.FormatForLike(prm.NotesPartial) + "%'");

			// Status.
			if (prm.StatusCat != SpmInstitution.StatusCat.Any)
			{
				//filter.Add(SpmDbDfn.GetColumnNameQual(SpmDbDfn.ColumnIdx.SwmInstitution_Status, aliasInstitution) + " = '" + SacsSystem.GetStatusCode(SaStatus.Active) + "'");
			}


			if (filter.Count < 1) filter.Add("1=1");
			return filter;
		}

		//-------------------------------------------------------------------
		// Institution sort columns.
		public List<String> GetInstitutionSortColumns (SpmInstitution.Params prm)
		{
			// Sort sequence:
			List<String> sortColumnNames = new List<String>();
			foreach (var columnDfn in prm.SortColumns)
			{
				// Need to ensure correct alias used for Institution columns in case of conflict.
				String sortCol = String.Empty;
				if (SpmDbDfn.GetTableForColumn((SpmDbDfn.ColumnIdx)columnDfn.DbColumn) == SpmDbDfn.TableIdx.SwmInstitution)
				{
					sortCol = SpmDbDfn.GetColumnNameQual((SpmDbDfn.ColumnIdx)columnDfn.DbColumn, aliasInstitution);
				}
				else
				{
					sortCol = columnDfn.DataName;
					if (!StringUtil.IsEmpty(columnDfn.SortDataName))
						sortCol = columnDfn.SortDataName;
				}
				if (!sortCol.IsEmpty())
				{
					DbOrderByNullMode orderByNullMode = DbOrderByNullMode.Default; // eSaOrderByDemoteNulls, eSaOrderByPromoteNulls
					sortColumnNames.Add(DbQuery.FormatForOrderBy(sortCol, columnDfn.SortAscending, orderByNullMode).Concat(", "));
				}
			}
			sortColumnNames.RemoveBlanks();
			if (sortColumnNames.IsEmpty())
			{
				// Default sort columns:
				//sortColumnNames.Add(SpmDbDfn.GetColumnNameQual(SpmDbDfn.ColumnIdx.SwmInstitution_Type, aliasInstitution) + " ASC");
			}
			return sortColumnNames;
		}

		//-------------------------------------------------------------------
		// Institution count.
		private long GetInstitutionCount (String filter)
		{
			ClearErrorState();
			return Database.GetRowCount(SpmDbDfn.GetTableName(SpmDbDfn.TableIdx.SwmInstitution) + " As " + aliasInstitution, filter);
		}
		public override long GetInstitutionCount (SpmInstitution.Params prm)
		{
			ClearErrorState();
			return GetInstitutionCount(GetInstitutionQueryFilter(prm).Concat(" AND ", "(", ")"));
		}

		//-------------------------------------------------------------------
		// Institution list.
		public override List<SpmInstitution> GetInstitutionList (SpmInstitution.Params prm)
		{
			List<SpmInstitution> Institutiones = new List<SpmInstitution>();
			DbQuery qry = new DbQuery(Database.DbmsType);
			qry.Tables.Add(SpmDbDfn.GetTableName(SpmDbDfn.TableIdx.SwmInstitution), aliasInstitution);
			qry.Columns.AddRange(SwmInstitution_Db.Fields);
			qry.Filters.AddRange(GetInstitutionQueryFilter(prm));
			// Query data.
			using (var dbConnection = Database.CreateConnection())
			using (var dbCommand = dbConnection.CreateCommand())
			{
				try
				{
					dbConnection.Open();
					dbCommand.CommandText = qry.BuildQuery();
					using (DbDataReader dbDataReader = dbCommand.ExecuteReader())
					{
						while (dbDataReader.Read())
						{
							SwmInstitution_Db dbInstitution = new SwmInstitution_Db(DbInfo);
							dbInstitution.PopulateFrom(dbDataReader);
							Institutiones.Add(CreateInstitution(dbInstitution));
						}
					}
				}
				catch (Exception exc)
				{
					Logger.Warn(GetType().Name + ".GetInstitutionList\n\tQuery: " + dbCommand.CommandText + "\n\tException: " + exc.Message);
				}
			}
			return Institutiones;
		}

		//-------------------------------------------------------------------
		// Institution query execution.
		public override DbResultSet ExecuteInstitutionQuery (List<ColumnDfn> columns, SpmInstitution.Params prm)
		{
			ClearErrorState();

			//---------------------------------------------------------------
			// Construct query.
			DbQuery query = new DbQuery(Database.DbmsType);
			query.Tables.Add(SpmDbDfn.GetTableName(SpmDbDfn.TableIdx.SwmInstitution), aliasInstitution);

			// Institution Properties - add columns as defined in query list.
			if (columns.HasId((int)SpmInstitution.Column.Id))
				query.Columns.Add(SpmDbDfn.GetColumnNameQual(SpmDbDfn.ColumnIdx.SwmInstitution_Id, aliasInstitution));
			if (columns.HasId((int)SpmInstitution.Column.Name))
				query.Columns.Add(SpmDbDfn.GetColumnNameQual(SpmDbDfn.ColumnIdx.SwmInstitution_Name, aliasInstitution));

			// Common Properties
			if (columns.HasId((int)SpmInstitution.Column.Notes))
				query.Columns.Add(SpmDbDfn.GetColumnNameQual(SpmDbDfn.ColumnIdx.SwmInstitution_Notes, aliasInstitution));
			if (columns.HasId((int)SpmInstitution.Column.Status) || columns.HasId((int)SpmInstitution.Column.Status_Desc) || columns.HasId((int)SpmInstitution.Column.Status_Ind))
				query.Columns.Add(SpmDbDfn.GetColumnNameQual(SpmDbDfn.ColumnIdx.SwmInstitution_Status, aliasInstitution));
			if (columns.HasId((int)SpmInstitution.Column.CreateOn_Date))
				query.Columns.Add(SpmDbDfn.GetColumnNameQual(SpmDbDfn.ColumnIdx.SwmInstitution_CreateOn, aliasInstitution));
			if (columns.HasId((int)SpmInstitution.Column.UpdateOn_Date))
				query.Columns.Add(SpmDbDfn.GetColumnNameQual(SpmDbDfn.ColumnIdx.SwmInstitution_UpdateOn, aliasInstitution));

			//---------------------------------------------------------------
			// Populate filter.
			query.Filters.AddRange(GetInstitutionQueryFilter(prm));

			if (prm.IncludedIds.Count != 1)
			{
				// Configure sort sequence.
				foreach (String sortColumn in GetInstitutionSortColumns(prm))
					query.OrderBy.Add(sortColumn);
			}

			//---------------------------------------------------------------
			//return new DbResultSet_DataTableReader(Database, query.BuildQuery());
			return new Sarand.Win.Dbas.Data.DbResultSet_DataReader(Database, query.BuildQuery());
		}

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