/*********************************************************************************************
 * Copyright 2004 - Volian Enterprises, Inc. All rights reserved.
 * Volian Enterprises - Proprietary Information - DO NOT COPY OR DISTRIBUTE
 * ------------------------------------------------------------------------------
 * $Workfile: vdb_TransUsage.cs $     $Revision: 7 $
 * $Author: Kathy $   $Date: 5/01/06 11:17a $
 *
 * $History: vdb_TransUsage.cs $
 * 
 * *****************  Version 7  *****************
 * User: Kathy        Date: 5/01/06    Time: 11:17a
 * Updated in $/LibSource/VDB
 * Fix B2006-018: single quote in proc number causes problem on data
 * request
 * 
 * *****************  Version 6  *****************
 * User: Kathy        Date: 8/16/05    Time: 2:54p
 * Updated in $/LibSource/VDB
 * B2005-030: error if missing ndx
 * 
 * *****************  Version 5  *****************
 * User: Kathy        Date: 4/21/05    Time: 10:20a
 * Updated in $/LibSource/VDB
 * always write inf file
 * 
 * *****************  Version 4  *****************
 * User: Kathy        Date: 3/08/05    Time: 1:48p
 * Updated in $/LibSource/VDB
 * Approval
 * 
 * *****************  Version 3  *****************
 * User: Jsj          Date: 8/30/04    Time: 12:16p
 * Updated in $/LibSource/VDB
 * upper cased WHERE string did not find mixed cased database items, now
 * use the WHERE string as it is passed in.
 * 
 * *****************  Version 2  *****************
 * User: Jsj          Date: 8/23/04    Time: 10:13a
 * Updated in $/LibSource/VDB
 * Fixed replace of single quote
 * 
 * *****************  Version 1  *****************
 * User: Kathy        Date: 7/27/04    Time: 8:40a
 * Created in $/LibSource/VDB
 *********************************************************************************************/

using System;
using System.Data;
using System.Text;
using System.Collections.Specialized;
using System.IO;
using System.Windows.Forms;
using VDB;
using VDB_ConnType;

namespace VDB_TransUsage
{
	/// <summary>
	/// Open, Create, Delete, Update functions for Transition Usage files (tables)
	/// </summary>
	public class vdb_TransUsage:VDB_Base
	{
		public enum SortTypes {NotSorted,FromSort,ToSort}; // list of sorting types

		public string TransFromNDX = "";
		public string TransToNDX = "";

		public vdb_TransUsage(String strPath):base(strPath)
		{
			// if no table (file name) specified, then default to TRAN (TRAN.DBF)
			if (DBTable.Equals(""))
				DBTable = "TRAN";
		}

		// Build a SQL statement. Optionally sort and filter the select statement.
		private void BuildSelectCommand(int SortingType,string WhereStr)
		{
			StringBuilder tmp = new StringBuilder();
			tmp.Append("SELECT [FROMNUMBER],[FROMSEQUEN],[FROMINSTAN],[TYPE],");
			tmp.Append("[TONUMBER],[TOSEQUENCE],[TOINSTANCE],[DTI],[OLDTO] FROM [");
			tmp.Append(DBTable);
			tmp.Append("]");
			
			if (WhereStr.Length > 0) // Was a WHERE clause passed in?
			{
				// Add " WHERE " to the beginning if it is not already there
				string tmpstr = WhereStr.ToUpper();
				if (tmpstr[0] != ' ')
				{
					tmp.Append(" ");
					if (!tmpstr.StartsWith("WHERE "))
						tmp.Append("WHERE ");
				}
				else if (!tmpstr.StartsWith(" WHERE "))
					tmp.Append(" WHERE");
				// add the passed in WHERE clause
// When the WhereStr was upper cased, procedure numbers with mixed and/or lower
// cased letters would not be found.  Therefore, use the WhereStr exactly as it
// was sent in.
//				tmp.Append(tmpstr);
				tmp.Append(WhereStr);
			}

			switch (SortingType)
			{
				case 0: //NotSorted
					break;
				case 1: // FromSort - sorted by FROMNUMBER
					tmp.Append(" GROUP BY [FROMNUMBER],[FROMSEQUEN],[FROMINSTAN],[TYPE],");
					tmp.Append("[TONUMBER],[TOSEQUENCE],[TOINSTANCE],[DTI],[OLDTO]");
					break;
				case 2: // Tosort - sorted by TONUMBER
					tmp.Append(" GROUP BY [TONUMBER],[TOSEQUENCE],[TOINSTANCE],");
					tmp.Append("[FROMNUMBER],[FROMSEQUEN],[FROMINSTAN],[TYPE],[DTI],[OLDTO]");
					break;
			}
			SelectCmd = tmp.ToString();		
		}


		private void BuildNDXFileNames()
		{
			TransFromNDX = DBTable +"FROM";
			TransToNDX = DBTable + "TO";
		}


		// Build the SQL command needed to update a row in the TRAN file
		public override string GetRecUpdateStr(DataTable tbl,DataRow row)
		{
			int j = 0;
			bool FirstOne = true;
			StringBuilder updateStr = new StringBuilder();
			string strNumber = "";
			string strSequence = "";
			string strInstance = "";

			updateStr.Append("UPDATE [");
			updateStr.Append(DBTable);
			updateStr.Append("] SET");

			foreach (DataColumn col in tbl.Columns)
			{
				bool isString = (col.DataType == Type.GetType("System.String"));

				if (col.ColumnName.Equals("FROMNUMBER"))
				{
					strNumber = row.ItemArray[j].ToString();
					strNumber = strNumber.Replace("'","''");
				}
				else if (col.ColumnName.Equals("FROMSEQUEN"))
				{
					strSequence = row.ItemArray[j].ToString();
					strSequence = strSequence.Replace("'","''");
				}
				else if (col.ColumnName.Equals("FROMINSTAN"))
				{
					strInstance = row.ItemArray[j].ToString();
					strInstance = strInstance.Replace("'","''");
				}

				if (FirstOne)
				{
					updateStr.Append(" [");
					FirstOne = false;
				}
				else
					updateStr.Append(", [");

				updateStr.Append(col.ColumnName);
				updateStr.Append("]=");

				if (row.ItemArray[j].ToString().Equals(""))
				{
					updateStr.Append("NULL");
				}
				else if (isString)
				{
					String tmpstr = row.ItemArray[j].ToString();
					updateStr.Append("'");
					tmpstr = tmpstr.Replace("'","''");
					updateStr.Append(tmpstr);
					updateStr.Append("'");
				}
				j++;
			}
			// Add the WHERE clause
			updateStr.Append(" WHERE [FROMNUMBER] = '");
			updateStr.Append(strNumber.ToString());
			updateStr.Append("' AND [FROMSEQUEN] = '");
			updateStr.Append(strSequence.ToString());
			updateStr.Append("' AND [FROMINSTAN] = '");
			updateStr.Append(strInstance.ToString());
			updateStr.Append("'");
			return updateStr.ToString();
		}


		// Build the SQL command needed to insert a row in the TRAN file
		public override string GetRecInsertStr(DataTable tbl,DataRow row)
		{
			int j = 0;
			StringBuilder insrtStr = new StringBuilder();
			StringBuilder valueStr = new StringBuilder();

			insrtStr.Append("INSERT INTO [");
			insrtStr.Append(DBTable);
			insrtStr.Append("] (");

			valueStr.Append(" VALUES (");

			foreach (DataColumn col in tbl.Columns)
			{
				bool isString = (col.DataType == Type.GetType("System.String"));
				insrtStr.Append("[");
				insrtStr.Append(col.ColumnName);
				insrtStr.Append("],");

				if (row.ItemArray[j].ToString().Equals(""))
				{
					valueStr.Append("NULL");
				}
				else if (isString)
				{
					String tmpstr = row.ItemArray[j].ToString();
					tmpstr = tmpstr.Replace("'","''");
					valueStr.Append("'");
					valueStr.Append(tmpstr);
					valueStr.Append("'");
				}
				else
				{
					valueStr.Append(row.ItemArray[j].ToString());
				}
				valueStr.Append(",");
				j++;
			}

			insrtStr = insrtStr.Replace(',',')',insrtStr.Length-1,1);
			valueStr = valueStr.Replace(',',')',valueStr.Length-1,1);
			insrtStr.Append(valueStr.ToString());

			return insrtStr.ToString();
		}

		// Build the SQL command needed to delete a row in the TRAN file
		public override string RecDeleteStr(DataTable tbl,DataRow row)
		{
			int j = 0;
			string strNumber = "";
			string strSequence = "";
			string strInstance = "";
			StringBuilder deleteStr = new StringBuilder();

			deleteStr.Append("DELETE FROM [");
			deleteStr.Append(DBTable);
			deleteStr.Append("]");

			row.RejectChanges();
			foreach (DataColumn col in tbl.Columns)
			{
				if (col.ColumnName.Equals("FROMNUMBER"))
				{
					strNumber = row.ItemArray[j].ToString();
					strNumber = strNumber.Replace("'","''");
				}
				else if (col.ColumnName.Equals("FROMSEQUEN"))
				{
					strSequence = row.ItemArray[j].ToString();
					strSequence = strSequence.Replace("'","''");
				}
				else if (col.ColumnName.Equals("FROMINSTAN"))
				{
					strInstance = row.ItemArray[j].ToString();
					strInstance = strInstance.Replace("'","''");
				}
				j++;
			}
			// Add the WHERE clause
			deleteStr.Append(" WHERE [FROMNUMBER] = '");
			deleteStr.Append(strNumber.ToString());
			deleteStr.Append("' AND [FROMSEQUEN] = '");
			deleteStr.Append(strSequence.ToString());
			deleteStr.Append("' AND [FROMINSTAN] = '");
			deleteStr.Append(strInstance.ToString());
			deleteStr.Append("'");

			return deleteStr.ToString();

		}

		public override string GetCreateIndx1String()
		{
			StringBuilder index1Str = new StringBuilder();
			index1Str.Append("CREATE INDEX [");
			index1Str.Append(TransFromNDX);
			index1Str.Append("] ON ");
			index1Str.Append(DBTable);
			index1Str.Append(".DBF ([FROMNUMBER],[FROMSEQUEN],[FROMINSTAN])");
			return (index1Str.ToString());
		}

		public override string GetCreateIndx2String()
		{
			StringBuilder index2Str = new StringBuilder();
			index2Str.Append("CREATE INDEX [");
			index2Str.Append(TransToNDX);
			index2Str.Append("] ON ");
			index2Str.Append(DBTable);
			index2Str.Append(".DBF ([TONUMBER], [TOSEQUENCE])");
			return (index2Str.ToString());
		}

		public override bool IndexFilesExist()
		{
			if (TransFromNDX==""||TransToNDX=="")BuildNDXFileNames();
			if(!File.Exists(DBPath+"\\"+TransFromNDX+".NDX") || !File.Exists(DBPath+"\\"+TransToNDX+".NDX")) return false;
			return true;
		}
		public override void DeleteIndexFiles()
		{
			if(File.Exists(DBPath+"\\"+TransFromNDX+".NDX")) File.Delete(DBPath+"\\"+TransFromNDX+".NDX");
			if(File.Exists(DBPath+"\\"+TransToNDX+".NDX")) File.Delete(DBPath+"\\"+TransToNDX+".NDX");
			if(File.Exists(DBPath+"\\"+DBTable+".INF")) File.Delete(DBPath+"\\"+DBTable+".INF");
		}

		public override StringCollection CreateIndexFilesStatements()
		{
			if (isdBaseFile())
			{
				StringCollection rtnStrColl = new StringCollection();
				string indx1 = GetCreateIndx1String();
				rtnStrColl.Add(indx1);
				string indx2 = GetCreateIndx2String();
				rtnStrColl.Add(indx2);
				return rtnStrColl;
			}
			return null;
		}

		// Build a list of SQL commands needed to create a new TRAN table (file)
		// and add the first row
		public override StringCollection CreateTableStatements(string strTblName)
		{
			StringCollection rtnStrColl = new StringCollection();
			StringBuilder createStr = new StringBuilder();
			//StringBuilder index1Str = new StringBuilder();
			//StringBuilder index2Str = new StringBuilder();

			if (strTblName.Length > 0) // was a table name passd in?
			{
				DBTable = strTblName;
			}

			if (DBTable.Equals(""))
			{
				MessageBox.Show("Trying to Create a new Table without a Name","Create Table Error");
				return rtnStrColl;
			}

			// Build the command that creates a new SET table (file)
			createStr.Append("CREATE TABLE [");
			createStr.Append(DBTable);
			createStr.Append("] ");
			createStr.Append("([FROMNUMBER] Char(20), [FROMSEQUEN] Char(12), ");
			createStr.Append("[FROMINSTAN] Char(1), [TYPE] Char(1),");
			createStr.Append("[TONUMBER] Char(20), [TOSEQUENCE] Char(12), ");
			createStr.Append("[TOINSTANCE] Char(2), [DTI] Char(18), [OLDTO] Char(32))");

			rtnStrColl.Add(createStr.ToString()); // add create table

			if (isdBaseFile())
			{
				// Build the command that creates the first index file
				rtnStrColl.Add(GetCreateIndx1String()); // add create 1st index

				// Build the commmand that creates the second index file
				//string tmp = DBTable;				

				rtnStrColl.Add(GetCreateIndx2String()); // add create 2nd index
			}

			return rtnStrColl;
		}

		// After the table is created, create the associated INF file
		public override int PostCreateTableFunction()
		{
			CreateINF();  // should already be created
			return 0;
		}

		// This will be called from CreateTableStatements()
		// and this is called if the table name is assigned to the DBTable property
		public override int CreateINF()
		{
			// if we are using dBase files, create an INF file containing
			// a list of the associated NDX files.
			if (isdBaseFile())
			{
				StreamWriter infFile;
				string infFileStr;
				StringBuilder tmp = new StringBuilder();

				// build the ndx file names (w/o extensions)
				BuildNDXFileNames();

				//build INF file name
				tmp.Append(DBPath);
				tmp.Append("\\");
				tmp.Append(DBTable);
				tmp.Append(".INF");

				infFileStr = tmp.ToString();

				// if the INF file does not already exist create it
				//if (!File.Exists(infFileStr))
				//{
				// always recreate it. Some plants' data had invalid files
				// and it was felt that it would be quicker to recreate always
				// rather than 
				infFile = new StreamWriter(infFileStr,false);
				infFile.Write("NDX1=");
				infFile.Write(TransFromNDX); // TRANFROM.NDX
				infFile.Write(".NDX\r\n");
				infFile.Write("NDX2=");
				infFile.Write(TransToNDX); //TRANTO.NDX
				infFile.Write(".NDX\r\n");
				infFile.Close();
				//}
			}
			return 0;
		}

		// return a list of SQL commands that will drop (delete) a database table (file)
		public override StringCollection DeleteTableStatements(string strTblName)
		{
			StringCollection rtnStrColl = new StringCollection();
			StringBuilder DropTableStr = new StringBuilder();

			DropTableStr.Append("Drop Table [");
			DropTableStr.Append(DBTable);
			DropTableStr.Append("]");

			rtnStrColl.Add(DropTableStr.ToString());
			return rtnStrColl;
		}

		// return a dataset of Transition Usage records, not sorted
		public System.Data.DataSet GetNotSorted(string WhereStr)
		{
			BuildSelectCommand((int)SortTypes.NotSorted,WhereStr);
			return DB_Data;
		}

		// return a dataset or Transition Usage records, sorted by the [FROMNUMBER] field
		public System.Data.DataSet GetSortedByFromTrans(string WhereStr)
		{
			BuildSelectCommand((int)SortTypes.FromSort,WhereStr);
			return DB_Data;
		}

		// return a dataset or Transition Usage records, sorted by the [TONUMBER] field
		public System.Data.DataSet GetSortedByToTrans(string WhereStr)
		{
			BuildSelectCommand((int)SortTypes.ToSort,WhereStr);
			return DB_Data;
		}

		public void UpdateProcNumber(string oldnum, string newnum)
		{
			// Change fromnumber first, then tonumber
			StringBuilder updateStr = new StringBuilder();
			updateStr.Append("UPDATE [");
			updateStr.Append(DBTable);
			updateStr.Append("] SET [FROMNUMBER] = '");
			updateStr.Append(newnum.Replace("'","''"));
			updateStr.Append("' WHERE [FROMNUMBER] = '");
			updateStr.Append(oldnum.Replace("'","''"));
			updateStr.Append("'");
			ProcessACommand(updateStr.ToString());

			// now to...
			updateStr.Remove(0,updateStr.Length);
			updateStr.Append("UPDATE [");
			updateStr.Append(DBTable);
			updateStr.Append("] SET [TONUMBER] = '");
			updateStr.Append(newnum.Replace("'","''"));
			updateStr.Append("' WHERE [TONUMBER] = '");
			updateStr.Append(oldnum.Replace("'","''"));
			updateStr.Append("'");
			ProcessACommand(updateStr.ToString());
		}
	}
}