///////////////////////////////////////////////////////////
//  UnitOfMeasure.cs
//  Implementation of Class UnitOfMeasure
//  CSLA type: Editable Child 
//  Created on: 07-Jun-2004 8:41:40 AM
//  Object design: Joyce 
//	Coded: John 04-Nov-2004
///////////////////////////////////////////////////////////

using System;
using System.Data;
using CSLA.Data;
using GZTW.Data;
using CSLA;
using System.Threading;
using CSLA.Security;


namespace GZTW.AyaNova.BLL {
	/// <summary>
	/// Displays on reports and Parts screen selection. (e.g. each, per 100, per box,
	/// MBF, etc) to identify units of measure for the part
	/// </summary>
	[Serializable]
	public class UnitOfMeasure : BusinessBase {
		#region Attributes 

		private bool bReadOnly;
		private Guid mID;
		private string mName=null;
		private bool mActive;
		private SmartDate mCreated;
		private SmartDate mModified;
		private Guid mCreator;
		private Guid mModifier;		

		#endregion

		#region Constructor	

		/// <summary>
		/// Private constructor to prevent direct instantiation
		/// </summary>
		private UnitOfMeasure()
		{
			MarkAsChild();

			//Set to read / write initially so that properties
			//can be set
			bReadOnly=false;

			//New ID
			mID = Guid.NewGuid();
			//pre-break the rule
			Name="";
			Active=true;

			//Set record history to defaults
			mCreated = new SmartDate(DBUtil.CurrentWorkingDateTime);
			mModified=new SmartDate();
			mCreator=Guid.Empty;
			mModifier=Guid.Empty;
		
		}
		#endregion

		#region Business properties
		/// <summary>
		/// Get internal id number Read only property because it's set internally, not
		/// externally
		/// </summary>
		public Guid ID 
		{
			get
			{
				return mID;
			}
		}

		/// <summary>
		/// Get created date
		///
		/// 
		/// </summary>
		public string Created 
		{
			get
			{
				return mCreated.ToString();
			}
		}

		/// <summary>
		/// Get modified date
		///
		/// 
		/// </summary>
		public string Modified 
		{
			get
			{
				return mModified.ToString();
			}
		}

		/// <summary>
		/// Get user record ID of person who created this record
		///
		/// 
		/// </summary>
		public Guid Creator 
		{
			get
			{
				return mCreator;
			}
		}

		/// <summary>
		/// Get user ID of person who modified this record
		///
		/// 
		/// </summary>
		public Guid Modifier 
		{
			get
			{
				return mModifier;
			}
		}

		/// <summary>
		/// Set/get Name of item
		/// 
		/// </summary>
		public string Name 
		{
			get
			{
				return mName;
			}
			set
			{
				if(bReadOnly)
					ThrowSetError();
				else
				{
					if(mName!=value)
					{
						mName = value;

						BrokenRules.Assert("NameRequired","Error.Object.RequiredFieldEmpty,UnitOfMeasure.Label.Name","Name",value.Length==0);

						BrokenRules.Assert("NameLength",
							"Error.Object.FieldLengthExceeded255,UnitOfMeasure.Label.Name","Name",value.Length>255);
						
						MarkDirty();
						
					}
				}
			}
		}
		/// <summary>
		/// Get /set active status 
		/// </summary>
		public bool Active 
		{
			get
			{
				return mActive;
			}
			set
			{
				if(bReadOnly)
					ThrowSetError();
				else
				{
					if(mActive!=value)
					{
						mActive = value;
						MarkDirty();
						
					}
				}
			}
		}

		/// <summary>
		/// Throw an error when a read only user 
		/// tries to set a property
		/// (this should normally never be called unless someone is using the developer api since the UI
		/// should prevent it from happening initially)
		/// </summary>
		private void ThrowSetError()
		{
			throw new System.Security.SecurityException
				(
				string.Format
				(
				LocalizedTextTable.GetLocalizedTextDirect("Error.Security.NotAuthorizedToChange"),
				LocalizedTextTable.GetLocalizedTextDirect("O.UnitOfMeasure")
				)
				);
		}
		#endregion

		#region System.Object overrides
        /// <summary>
        /// 
        /// </summary>
        /// <returns></returns>
		public override string ToString()
		{
			return "UnitOfMeasure" + mID.ToString();
		}

		/// <summary>
		/// 
		/// </summary>
		/// <param name="obj"></param>
		/// <returns></returns>
		public override bool Equals(Object obj)
		{
			if ( obj == null || GetType ( ) != obj.GetType ( ) ) return false;
			UnitOfMeasure c=(UnitOfMeasure)obj;
			return mID==c.mID;
		}

        /// <summary>
        /// 
        /// </summary>
        /// <returns></returns>
		public override int GetHashCode()
		{
			return ("UnitOfMeasure" + mID).GetHashCode();
		}
		#endregion

		#region Static methods
		/// <summary>
		/// Get new object
		/// </summary>
		/// <returns></returns>
		internal static UnitOfMeasure NewItem()
		{
			
			if(AyaBizUtils.Right("Object.UnitOfMeasure")>(int)SecurityLevelTypes.ReadOnly)			
			{
				UnitOfMeasure c = new UnitOfMeasure();				
				return c;
			}
			else
				throw new System.Security.SecurityException(
					string.Format(
					LocalizedTextTable.GetLocalizedTextDirect("Error.Security.NotAuthorizedToCreate"),
					LocalizedTextTable.GetLocalizedTextDirect("O.UnitOfMeasure")));
		}

	/// <summary>
	/// 
	/// </summary>
	/// <param name="dr"></param>
	/// <returns></returns>
		internal static UnitOfMeasure GetItem(SafeDataReader dr)
		{
			
			if(AyaBizUtils.Right("Object.UnitOfMeasure")>(int)SecurityLevelTypes.NoAccess)			
			{
				UnitOfMeasure child = new UnitOfMeasure();
				child.Fetch(dr);
				return child;
			}
			else
				throw new System.Security.SecurityException(
					string.Format(
					LocalizedTextTable.GetLocalizedTextDirect("Error.Security.NotAuthorizedToRetrieve"),
					LocalizedTextTable.GetLocalizedTextDirect("O.UnitOfMeasure")));
		}


        /// <summary>
        /// Retrieve internal ID from name.
        /// 
        /// </summary>
        /// <param name="Name">Text value</param>
        /// <returns>Guid ID value or Guid.Empty if no match</returns>
        public static Guid GetIDFromName(string Name)
        {
            return GuidFetcher.GetItem("AUNITOFMEASURE", "ANAME", Name);
        }
		#endregion

		#region DAL DATA ACCESS
		/// <summary>
		/// Populate this object from the values in the datareader passed to it
		/// </summary>
		/// <param name="dr"></param>
		private void Fetch(SafeDataReader dr)
		{		
					
			//Standard fields
			mID=dr.GetGuid("aID");
			mCreated=DBUtil.ToLocal(dr.GetSmartDate("aCreated"));
			mModified=DBUtil.ToLocal(dr.GetSmartDate("aModified"));
			mCreator=dr.GetGuid("aCreator");
			mModifier=dr.GetGuid("aModifier");
					
			//UnitOfMeasure fields
			
			//Important: use property not internal field
			//so that initial broken rule is unbroken on fetch
			Name=dr.GetString("aName");	

			Active=dr.GetBoolean("AACTIVE");
				
			MarkOld();

			//Get access rights level
			bReadOnly=AyaBizUtils.Right("Object.UnitOfMeasure")<(int)SecurityLevelTypes.ReadWrite;
		}

		internal void Update(IDbTransaction tr)
		{
			//No need to update if there is nothing changed
			if(!this.IsDirty) return;
			
			// If not a new record, check if record was modified 
			//by another user since original retrieval:
			if(!IsNew)
				DBUtil.CheckSafeToUpdate(this.mModified.Date,this.mID,"aUnitOfMeasure");

			#region Delete
			if(IsDeleted)
			{
				if(!IsNew)
				{
					//Delete object and child objects
					DBCommandWrapper cmDelete = DBUtil.GetCommandFromSQL("DELETE FROM aUnitOfMeasure WHERE aID = @ID;");
					cmDelete.AddInParameter("@ID",DbType.Guid,this.mID);
					DBUtil.DB.ExecuteNonQuery(cmDelete, tr);
					//-----------------------------
				}
				MarkNew();
				return;
			}

			#endregion		

			#region Add / Update
			
			//get modification time temporarily, if update succeeds then
			//set to this time
			System.DateTime dtModified = DBUtil.CurrentWorkingDateTime;

			DBCommandWrapper cm = null;
			if(IsNew)//Add or update?
				cm=DBUtil.GetCommandFromSQL(
					"INSERT INTO aUnitOfMeasure (aID, aName,  AACTIVE, aCreated,aModified,aCreator,aModifier) " +
					"VALUES (@ID,@Name,@Active,@Created,@Modified,@CurrentUserID,@CurrentUserID)"
					);
			else
				cm=DBUtil.GetCommandFromSQL(
					"UPDATE aUnitOfMeasure SET aID=@ID, aName=@Name, AACTIVE=@Active, aModifier=@CurrentUserID, " +
					"aModified=@Modified WHERE " +
					"aID=@ID"
					);


			//UnitOfMeasure fields
			cm.AddInParameter("@Name",DbType.String,mName);	
			cm.AddInParameter("@Active",DbType.Boolean,mActive);

			//Standard fields
			cm.AddInParameter("@ID",DbType.Guid,this.mID);							
			cm.AddInParameter("@CurrentUserID",DbType.Guid, CurrentUserID);
			cm.AddInParameter("@Created",DbType.DateTime, DBUtil.ToUTC(mCreated.Date));
			cm.AddInParameter("@Modified",DbType.DateTime, DBUtil.ToUTC(dtModified));				
					
			DBUtil.DB.ExecuteNonQuery(cm, tr);	
			

			MarkOld();//db is now synched with object
			//Successful update so 
			//change modification time to match
			this.mModified.Date=dtModified;	
			#endregion
			
			
		}

		
		
		#endregion	

		
	}//end UnitOfMeasure

}//end namespace GZTW.AyaNova.BLL