using System;
using System.Collections.Generic;
using Sarand.Net.Standard.Base.App;
using Sarand.Net.Standard.Base.Core;
using Sarand.Net.Standard.Base.Bus;
using Sarand.Net.Standard.Base.Dbas;

namespace Sarand.Net.Standard.Base.ItemOptions
{
	//=======================================================================
	public abstract class SaItemOptionMgr : SacsItemMgr
	{
		//-------------------------------------------------------------------
		// Data members.
		private static readonly List<SaStatus> itemOptionStatuses = new List<SaStatus>();

		//-------------------------------------------------------------------
		// Static initialisation.
		static SaItemOptionMgr ()
		{
			// Item option statuses.
			itemOptionStatuses.Add(SaStatus.Current);
			itemOptionStatuses.Add(SaStatus.Deleted);
		}

		//-------------------------------------------------------------------
		// Construction.
		protected SaItemOptionMgr ()
		{
		}

		//-------------------------------------------------------------------
		// Properties.
		public abstract bool DatabaseIsValid { get; }
		public abstract bool CanUpdateDatabase { get; }

		//*******************************************************************
		//                      I t e m   O p t i o n s
		//*******************************************************************
		// Statuses.
		public static SaStatus ActiveItemOptionStatus { get { return SaStatus.Current; } }
		public static List<SaStatus> ItemOptionStatuses { get { return itemOptionStatuses; } }

		//-------------------------------------------------------------------
		// Associated data.

		//-------------------------------------------------------------------
		// Retrieve individual item options.
		public abstract bool ItemOptionExists (SaItemOption itemOption);
		public abstract bool ItemOptionExists (ItemId itemId, String name, String context);
		public abstract SaItemOption GetItemOption (SaItemOption itemOption);
		public abstract SaItemOption GetItemOption (ItemId itemId, String name, String context);

		// Create Item Option.
		public abstract SaItemOption CreateItemOption (ItemId itemId, String name, String context);

		//-------------------------------------------------------------------
		// Validate Item Option.
		public bool IsValidItemOption (SaItemOption itemOption)
		{
			ClearErrorState();
			if (itemOption == null) return SetErrorState(ErrorMessage.ItemNotSpecified);
			return IsValidItemOptionData(itemOption.GetData(), new SaItemOption.ErrField());
		}
		public virtual bool IsValidItemOptionData (SaItemOption.Data itemOptionData, SaItemOption.ErrField errField)
		{
			ClearErrorState();
			if ((int)itemOptionData.ItemId.Type < 1)
			{
				errField.ItemType = SacsHierarchyItem.ValidValue.Invalid;
				return SetErrorState(ErrorMessage.ItemTypeNotSpecified);
			}
			if (!SysId.IsValid(itemOptionData.ItemId.Id))
			{
				errField.ItemId = SacsHierarchyItem.ValidValue.Invalid;
				return SetErrorState(ErrorMessage.ItemIdNotSpecified);
			}
			if (!IsValidValue(itemOptionData.Name, "name", (long)SaItemOptionDbDfn.GetColTextLen(SaItemOptionDbDfn.ColumnIdx.SaItemOption_Name), true))
			{
				errField.Name = SacsHierarchyItem.ValidValue.Invalid;
				return false;
			}
			if (!IsValidValue(itemOptionData.Context, "context", (long)SaItemOptionDbDfn.GetColTextLen(SaItemOptionDbDfn.ColumnIdx.SaItemOption_Context)))
			{
				errField.Context = SacsHierarchyItem.ValidValue.Invalid;
				return false;
			}
			if (!IsValidValue(itemOptionData.Value, "value", (long)SaItemOptionDbDfn.GetColTextLen(SaItemOptionDbDfn.ColumnIdx.SaItemOption_Value)))
			{
				errField.Value = SacsHierarchyItem.ValidValue.Invalid;
				return false;
			}
			// Common properties.
			if (!IsValidValue(itemOptionData.Notes, "notes", (long)SaItemOptionDbDfn.GetColTextLen(SaItemOptionDbDfn.ColumnIdx.SaItemOption_Notes)))
			{
				errField.Notes = SacsHierarchyItem.ValidValue.Invalid;
				return false;
			}
			if (!ItemOptionStatuses.Contains(itemOptionData.Status))
			{
				errField.Status = SacsHierarchyItem.ValidValue.Invalid;
				return SetErrorState(ErrorMessage.InvalidStatus);
			}
			return true;
		}

		//-------------------------------------------------------------------
		// Database interface.
		public abstract bool InsertItemOption (SaItemOption itemOption, DbUpdateInfo dbUpdateInfo);
		public abstract bool UpdateItemOption (SaItemOption itemOption, DbUpdateInfo dbUpdateInfo);
		public virtual bool ItemOptionCanBeDeleted (SaItemOption itemOption)
		{
			ClearErrorState();
			return true;
		}
		public abstract bool DeleteItemOption (SaItemOption itemOption, DbUpdateInfo dbUpdateInfo);
		public abstract bool ClearItemOptionsForItem (ItemId itemId, DbUpdateInfo dbUpdateInfo);

		//-------------------------------------------------------------------
		// Item list.
		public abstract ColumnDfn GetItemOptionColumnDfn (SaItemOption.Column columnId, String caption = "", int width = 0);
		public abstract List<String> GetItemOptionQueryFilter (SaItemOption.Params prm);
		public abstract long GetItemOptionCount (SaItemOption.Params prm);
		public abstract List<SaItemOption> GetItemOptionList (SaItemOption.Params prm);
		public abstract DbResultSet ExecuteItemOptionQuery (List<ColumnDfn> columns, SaItemOption.Params prm);

		//-------------------------------------------------------------------
		/// <summary>
		/// Extract and format result set data value where specific handling is required.
		/// <para>Where response is an invalid data value, format value using column.FormatValue(values).</para>
		/// </summary>
		public DataValue GetItemOptionDataValue (ColumnDfn column, NamedValue.Map values)
		{
			DataValue value = new DataValue();
			switch ((SaItemOption.Column)column.Id)
			{
				//-----------------------------------------------------------
				// Item type.
				case SaItemOption.Column.ItemType_Desc:
				{
					short itemType = (short)values.GetValue(column.DataName).AsLong();
					value = new DataValue(itemType.ToString());
				}
				break;

				//-----------------------------------------------------------
				// Notes.
				case SaItemOption.Column.Notes:
				{
					value = new DataValue(SacsHierarchyItem.FormatForDisplay(values.GetValue(column.DataName).ToString(), 200));
				}
				break;

				//-----------------------------------------------------------
				// Status.
				case SaItemOption.Column.Status_Desc:
				case SaItemOption.Column.Status_Ind:
				{
					String statusCode = values.GetValue(column.DataName).ToString();
					SaStatus status = SacsSystem.GetStatusForCode(statusCode);
					if (column.Id == (int)SaItemOption.Column.Status_Desc)
						value = new DataValue(SacsSystem.GetStatusDescForCode(statusCode));
					else if (column.Id == (int)SaItemOption.Column.Status_Ind)
						value = new DataValue(SaItemOption.GetStatusTriState(status));
				}
				break;

				//-----------------------------------------------------------
			}
			return value;
		}

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