using System;
using System.Text;
using System.Collections.Generic;
using MySql.Data.MySqlClient;
using MarketData.MarketDataModel;
using MarketData.Utils;

namespace MarketData.DataAccess
{
  public class BalanceSheetDA
  {
    private BalanceSheetDA()
    {
    }
// ********************************************* B A L A N C E   S H E E T **************************************
// get the greatest date on record that is on or before asof date
    public static DateTime? GetMaxDateFromBalanceSheet(String symbol, DateTime asof,BalanceSheet.PeriodType periodType)
    {
      MySqlConnection sqlConnection = null;
      MySqlDataReader sqlDataReader = null;
      MySqlCommand sqlCommand=null;
      String strQuery = null;
      DateTime? maxDate=null;

      try
      {
        StringBuilder sb = new StringBuilder();
        sqlConnection = SqlUtils.CreateMySqlConnection(MainDataSource.Instance.LocateDataSource("market_data"));
        sb.Append("select asof from balancesheet where symbol=");
        sb.Append("'").Append(symbol).Append("'").Append(" ");
        sb.Append("and asof<=").Append("'").Append(Utility.DateTimeToStringYYYYHMMHDD(asof)).Append("' ");
        sb.Append("and period=").Append(periodType.Equals(BalanceSheet.PeriodType.Annual) ? 0 : 1).Append(" ");
        sb.Append(" order by asof desc ");
        sb.Append(" limit 1").Append(";");
        strQuery = sb.ToString(); ;
        sqlCommand = new MySqlCommand(strQuery, sqlConnection);
        sqlCommand.CommandTimeout = SqlUtils.COMMAND_TIMEOUT;
        sqlDataReader = sqlCommand.ExecuteReader();
        if (!sqlDataReader.Read()) return null;
        if(!sqlDataReader.IsDBNull(0))maxDate=sqlDataReader.GetDateTime(0);
        return maxDate;
      }
      catch (Exception exception)
      {
        MDTrace.WriteLine(LogLevel.DEBUG,exception);
        return null;
      }
      finally
      {
        if(null!=sqlCommand)sqlCommand.Dispose();
        if (null != sqlDataReader) sqlDataReader.Close();
        if (null != sqlConnection) sqlConnection.Close();
      }
    }
    public static double GetTotalStockHolderEquityOnOrBefore(String symbol, DateTime asof,BalanceSheet.PeriodType periodType)
    {
      MySqlConnection sqlConnection = null;
      MySqlDataReader sqlDataReader = null;
			MySqlCommand sqlCommand=null;
      String strQuery = null;
      double totalStockholderEquity=double.NaN;

      try
      {
        DateTime? maxDate=GetMaxDateFromBalanceSheet(symbol,asof,periodType);
        if(null==maxDate)return double.NaN;
        StringBuilder sb = new StringBuilder();
        sqlConnection = SqlUtils.CreateMySqlConnection(MainDataSource.Instance.LocateDataSource("market_data"));
        sb.Append("select total_stockholder_equity from balancesheet where symbol=");
        sb.Append("'").Append(symbol).Append("'").Append(" ");
        sb.Append("and period=").Append(periodType.Equals(BalanceSheet.PeriodType.Annual) ? 0 : 1).Append(" ");
        sb.Append("and asof=").Append("'").Append(Utility.DateTimeToStringYYYYHMMHDD(maxDate.Value)).Append("'");
        sb.Append(" limit 1").Append(";");
        strQuery = sb.ToString(); ;
        sqlCommand = new MySqlCommand(strQuery, sqlConnection);
        sqlCommand.CommandTimeout = SqlUtils.COMMAND_TIMEOUT;
        sqlDataReader = sqlCommand.ExecuteReader();
        if (!sqlDataReader.Read()) return double.NaN;
        if(!sqlDataReader.IsDBNull(0))totalStockholderEquity=sqlDataReader.GetDouble(0);
        return totalStockholderEquity;
      }
      catch (Exception exception)
      {
        MDTrace.WriteLine(LogLevel.DEBUG,exception);
        return double.NaN;
      }
      finally
      {
				if(null!=sqlCommand)sqlCommand.Dispose();
        if (null != sqlDataReader) sqlDataReader.Close();
        if (null != sqlConnection) sqlConnection.Close();
      }
    }
    public static BalanceSheet GetBalanceSheetOnOrBefore(String symbol, DateTime asof,BalanceSheet.PeriodType periodType)
    {
      MySqlConnection sqlConnection = null;
      MySqlDataReader sqlDataReader = null;
			MySqlCommand sqlCommand=null;
      String strQuery = null;

      try
      {
        DateTime? maxDate=GetMaxDateFromBalanceSheet(symbol,asof,periodType);
        if(null==maxDate)return null;
        StringBuilder sb = new StringBuilder();
        sqlConnection = SqlUtils.CreateMySqlConnection(MainDataSource.Instance.LocateDataSource("market_data"));
        sb.Append("select symbol,asof,long_term_debt,other_liabilities,deferred_long_term_liabilities,minority_interest,negative_goodwill,total_stockholder_equity,inventory,property_plant_and_equipment,intangible_assets,accumulated_amortization,goodwill,period,total_assets,total_current_assets,total_liabilities,total_current_liabilities,cash_and_cash_equivalents,modified from balancesheet where symbol=");
        sb.Append("'").Append(symbol).Append("'").Append(" ");
        sb.Append("and period=").Append(periodType.Equals(BalanceSheet.PeriodType.Annual) ? 0 : 1).Append(" ");
        sb.Append("and asof=").Append("'").Append(Utility.DateTimeToStringYYYYHMMHDD(maxDate.Value)).Append("'");
        sb.Append(" limit 1").Append(";");
        strQuery = sb.ToString(); ;
        sqlCommand = new MySqlCommand(strQuery, sqlConnection);
        sqlCommand.CommandTimeout = SqlUtils.COMMAND_TIMEOUT;
        sqlDataReader = sqlCommand.ExecuteReader();
        if (!sqlDataReader.Read()) return null;
        BalanceSheet balanceSheet=new BalanceSheet();
        balanceSheet.Symbol=sqlDataReader.GetString(0);
        balanceSheet.AsOf=sqlDataReader.GetDateTime(1);
        if (!sqlDataReader.IsDBNull(2))balanceSheet.LongTermDebt= sqlDataReader.GetDouble(2);
        if (!sqlDataReader.IsDBNull(3))balanceSheet.OtherLiabilities=sqlDataReader.GetDouble(3);
        if (!sqlDataReader.IsDBNull(4))balanceSheet.DeferredLongTermLiabilities=sqlDataReader.GetDouble(4);
        if (!sqlDataReader.IsDBNull(5))balanceSheet.MinorityInterest=sqlDataReader.GetDouble(5);
        if (!sqlDataReader.IsDBNull(6))balanceSheet.NegativeGoodwill=sqlDataReader.GetDouble(6);
        if (!sqlDataReader.IsDBNull(7)) balanceSheet.TotalStockHolderEquity = sqlDataReader.GetDouble(7);
        if (!sqlDataReader.IsDBNull(8)) balanceSheet.Inventory = sqlDataReader.GetDouble(8);
        if (!sqlDataReader.IsDBNull(9)) balanceSheet.PropertyPlantAndEquipment = sqlDataReader.GetDouble(9);
        if (!sqlDataReader.IsDBNull(10)) balanceSheet.IntangibleAssets = sqlDataReader.GetDouble(10);
        if (!sqlDataReader.IsDBNull(11)) balanceSheet.AccumulatedAmortization = sqlDataReader.GetDouble(11);
        if (!sqlDataReader.IsDBNull(12)) balanceSheet.Goodwill = sqlDataReader.GetDouble(12);
        if (!sqlDataReader.IsDBNull(13)) balanceSheet.Period = sqlDataReader.GetInt32(13) == 0 ? BalanceSheet.PeriodType.Annual : BalanceSheet.PeriodType.Quarterly;
        if (!sqlDataReader.IsDBNull(14)) balanceSheet.TotalAssets = sqlDataReader.GetDouble(14);
        if (!sqlDataReader.IsDBNull(15)) balanceSheet.TotalCurrentAssets = sqlDataReader.GetDouble(15);
        if (!sqlDataReader.IsDBNull(16)) balanceSheet.TotalLiabilities = sqlDataReader.GetDouble(16);
        if (!sqlDataReader.IsDBNull(17)) balanceSheet.TotalCurrentLiabilities = sqlDataReader.GetDouble(17);
        if (!sqlDataReader.IsDBNull(18)) balanceSheet.CashAndCashEquivalents = sqlDataReader.GetDouble(18);
        if (!sqlDataReader.IsDBNull(19)) balanceSheet.Modified = sqlDataReader.GetDateTime(19);
        return balanceSheet;
      }
      catch (Exception exception)
      {
        MDTrace.WriteLine(LogLevel.DEBUG,exception);
        return null;
      }
      finally
      {
				if(null!=sqlCommand)sqlCommand.Dispose();
        if (null != sqlDataReader) sqlDataReader.Close();
        if (null != sqlConnection) sqlConnection.Close();
      }
    }
    public static bool CheckBalanceSheetModifiedOn(String symbol, DateTime modified,BalanceSheet.PeriodType periodType)
    {
      MySqlConnection sqlConnection = null;
      MySqlDataReader sqlDataReader = null;
			MySqlCommand sqlCommand=null;
      String strQuery = null;
      DateTime? maxDate = DateTime.Parse("01-01-0001");

      try
      {
        StringBuilder sb = new StringBuilder();
        sqlConnection = SqlUtils.CreateMySqlConnection(MainDataSource.Instance.LocateDataSource("market_data"));
        sb.Append("select count(*) from balancesheet");
        sb.Append(" where symbol='").Append(symbol).Append("'").Append(" ");
        sb.Append(" and period=").Append(periodType.Equals(BalanceSheet.PeriodType.Annual) ? 0 : 1).Append("").Append(" ");
        sb.Append("and modified='").Append(Utility.DateTimeToStringYYYYHMMHDD(modified)).Append("'");
        strQuery = sb.ToString(); ;
        sqlCommand = new MySqlCommand(strQuery, sqlConnection);
        sqlCommand.CommandTimeout = SqlUtils.COMMAND_TIMEOUT;
        sqlDataReader = sqlCommand.ExecuteReader();
        sqlDataReader.Read();
        int recordCount = sqlDataReader.GetInt32(0);
        return 0 == recordCount ? false : true;
      }
      catch (Exception exception)
      {
        MDTrace.WriteLine(LogLevel.DEBUG,exception);
        return false;
      }
      finally
      {
				if(null!=sqlCommand)sqlCommand.Dispose();
        if (null != sqlDataReader) sqlDataReader.Close();
        if (null != sqlConnection) sqlConnection.Close();
      }
    }
    public static List<DateTime> GetBalanceSheetDates(String symbol,BalanceSheet.PeriodType periodType)
    {
      List<DateTime> balanceSheetDates = new List<DateTime>();
      MySqlConnection sqlConnection = null;
      MySqlDataReader sqlDataReader = null;
			MySqlCommand sqlCommand=null;
      String strQuery = null;

      try
      {
        StringBuilder sb = new StringBuilder();
        sqlConnection = SqlUtils.CreateMySqlConnection(MainDataSource.Instance.LocateDataSource("market_data"));
        sb.Append("select asof from balancesheet where symbol='").Append(symbol).Append("' ");
        sb.Append("and period='").Append(periodType.Equals(BalanceSheet.PeriodType.Annual) ? 0 : 1).Append("'");
        sb.Append(" order by 1 asc;");
        strQuery = sb.ToString(); ;
        sqlCommand = new MySqlCommand(strQuery, sqlConnection);
        sqlCommand.CommandTimeout = SqlUtils.COMMAND_TIMEOUT;
        sqlDataReader = sqlCommand.ExecuteReader();
        while(sqlDataReader.Read())
        {
          DateTime asof=sqlDataReader.GetDateTime(0);
          balanceSheetDates.Add(asof);
        }
        return balanceSheetDates;
      }
      catch (Exception exception)
      {
        MDTrace.WriteLine(LogLevel.DEBUG,exception);
        return balanceSheetDates;
      }
      finally
      {
				if(null!=sqlCommand)sqlCommand.Dispose();
        if (null != sqlDataReader) sqlDataReader.Close();
        if (null != sqlConnection) sqlConnection.Close();
      }
    }
    public static DateTime? GetLatestBalanceSheetDate(String symbol,BalanceSheet.PeriodType periodType)
    {
      MySqlConnection sqlConnection = null;
      MySqlDataReader sqlDataReader = null;
			MySqlCommand sqlCommand=null;
      String strQuery = null;
      DateTime? maxDate = DateTime.Parse("01-01-0001");

      try
      {
        StringBuilder sb = new StringBuilder();
        sqlConnection = SqlUtils.CreateMySqlConnection(MainDataSource.Instance.LocateDataSource("market_data"));
        sb.Append("select max(asof) from balancesheet");
        sb.Append(" where symbol='").Append(symbol).Append("' ");
        sb.Append(" and period=").Append(periodType.Equals(BalanceSheet.PeriodType.Annual) ? 0 : 1);
        strQuery = sb.ToString(); ;
        sqlCommand = new MySqlCommand(strQuery, sqlConnection);
        sqlCommand.CommandTimeout = SqlUtils.COMMAND_TIMEOUT;
        sqlDataReader = sqlCommand.ExecuteReader();
        if (sqlDataReader.Read())
        {
          if (sqlDataReader.IsDBNull(0)) maxDate = null;
          else maxDate = sqlDataReader.GetDateTime(0);
        }
        return maxDate;
      }
      catch (Exception exception)
      {
        MDTrace.WriteLine(LogLevel.DEBUG,exception);
        return maxDate;
      }
      finally
      {
				if(null!=sqlCommand)sqlCommand.Dispose();
        if (null != sqlDataReader) sqlDataReader.Close();
        if (null != sqlConnection) sqlConnection.Close();
      }
    }
    public static BalanceSheet GetBalanceSheet(String symbol,BalanceSheet.PeriodType periodType)
    {
      MySqlConnection sqlConnection = null;
      MySqlDataReader sqlDataReader = null;
			MySqlCommand sqlCommand =null;
      String strQuery = null;

      try
      {
        StringBuilder sb = new StringBuilder();
        DateTime? latestDate = GetLatestBalanceSheetDate(symbol,periodType);
        if (null == latestDate) return null;
        sqlConnection = SqlUtils.CreateMySqlConnection(MainDataSource.Instance.LocateDataSource("market_data"));
        sb.Append("select symbol,asof,long_term_debt,other_liabilities,deferred_long_term_liabilities,minority_interest,negative_goodwill,total_stockholder_equity,inventory,property_plant_and_equipment,intangible_assets,accumulated_amortization,goodwill,period,total_assets,total_current_assets,total_liabilities,total_current_liabilities,cash_and_cash_equivalents,modified from balancesheet where symbol=");
        sb.Append("'").Append(symbol).Append("'").Append(" ");
        sb.Append("and period=").Append(periodType.Equals(BalanceSheet.PeriodType.Annual) ? 0 : 1).Append(" ");
        sb.Append("and asof=").Append("'").Append(Utility.DateTimeToStringYYYYHMMHDD(latestDate.Value)).Append("'").Append(";");
        strQuery = sb.ToString(); ;
        sqlCommand = new MySqlCommand(strQuery, sqlConnection);
        sqlCommand.CommandTimeout = SqlUtils.COMMAND_TIMEOUT;
        sqlDataReader = sqlCommand.ExecuteReader();
        if (!sqlDataReader.Read()) return null;
        BalanceSheet balanceSheet=new BalanceSheet();
        balanceSheet.Symbol=sqlDataReader.GetString(0);
        balanceSheet.AsOf=sqlDataReader.GetDateTime(1);
        if (!sqlDataReader.IsDBNull(2))balanceSheet.LongTermDebt= sqlDataReader.GetDouble(2);
        if (!sqlDataReader.IsDBNull(3))balanceSheet.OtherLiabilities=sqlDataReader.GetDouble(3);
        if (!sqlDataReader.IsDBNull(4))balanceSheet.DeferredLongTermLiabilities=sqlDataReader.GetDouble(4);
        if (!sqlDataReader.IsDBNull(5))balanceSheet.MinorityInterest=sqlDataReader.GetDouble(5);
        if (!sqlDataReader.IsDBNull(6))balanceSheet.NegativeGoodwill=sqlDataReader.GetDouble(6);
        if (!sqlDataReader.IsDBNull(7))balanceSheet.TotalStockHolderEquity = sqlDataReader.GetDouble(7);
        if (!sqlDataReader.IsDBNull(8)) balanceSheet.Inventory = sqlDataReader.GetDouble(8);
        if (!sqlDataReader.IsDBNull(9)) balanceSheet.PropertyPlantAndEquipment = sqlDataReader.GetDouble(9);
        if (!sqlDataReader.IsDBNull(10)) balanceSheet.IntangibleAssets = sqlDataReader.GetDouble(10);
        if (!sqlDataReader.IsDBNull(11)) balanceSheet.AccumulatedAmortization = sqlDataReader.GetDouble(11);
        if (!sqlDataReader.IsDBNull(12)) balanceSheet.Goodwill = sqlDataReader.GetDouble(12);
        if (!sqlDataReader.IsDBNull(13)) balanceSheet.Period = sqlDataReader.GetInt32(13)==0?BalanceSheet.PeriodType.Annual:BalanceSheet.PeriodType.Quarterly;
        if (!sqlDataReader.IsDBNull(14)) balanceSheet.TotalAssets = sqlDataReader.GetDouble(14);
        if (!sqlDataReader.IsDBNull(15)) balanceSheet.TotalCurrentAssets = sqlDataReader.GetDouble(15);
        if (!sqlDataReader.IsDBNull(16)) balanceSheet.TotalLiabilities = sqlDataReader.GetDouble(16);
        if (!sqlDataReader.IsDBNull(17)) balanceSheet.TotalCurrentLiabilities = sqlDataReader.GetDouble(17);
        if (!sqlDataReader.IsDBNull(18)) balanceSheet.CashAndCashEquivalents = sqlDataReader.GetDouble(18);
        if (!sqlDataReader.IsDBNull(19)) balanceSheet.Modified = sqlDataReader.GetDateTime(19);
        return balanceSheet;
      }
      catch (Exception exception)
      {
        MDTrace.WriteLine(LogLevel.DEBUG,exception);
        return null;
      }
      finally
      {
				if(null!=sqlCommand)sqlCommand.Dispose();
        if (null != sqlDataReader) sqlDataReader.Close();
        if (null != sqlConnection) sqlConnection.Close();
      }
    }
    public static BalanceSheet GetBalanceSheet(String symbol, DateTime asof,BalanceSheet.PeriodType periodType)
    {
      MySqlConnection sqlConnection = null;
      MySqlDataReader sqlDataReader = null;
			MySqlCommand sqlCommand=null;
      String strQuery = null;

      try
      {
        StringBuilder sb = new StringBuilder();
        sqlConnection = SqlUtils.CreateMySqlConnection(MainDataSource.Instance.LocateDataSource("market_data"));
        sb.Append("select symbol,asof,long_term_debt,other_liabilities,deferred_long_term_liabilities,minority_interest,negative_goodwill,total_stockholder_equity,inventory,property_plant_and_equipment,intangible_assets,accumulated_amortization,goodwill,period,total_assets,total_current_assets,total_liabilities,total_current_liabilities,cash_and_cash_equivalents,modified from balancesheet where symbol=");
        sb.Append("'").Append(symbol).Append("'").Append(" ");
        sb.Append("and period=").Append(periodType.Equals(BalanceSheet.PeriodType.Annual) ? 0 : 1).Append(" ");
        sb.Append("and asof=").Append("'").Append(Utility.DateTimeToStringYYYYHMMHDD(asof)).Append("'").Append(";");
        strQuery = sb.ToString(); ;
        sqlCommand = new MySqlCommand(strQuery, sqlConnection);
        sqlCommand.CommandTimeout = SqlUtils.COMMAND_TIMEOUT;
        sqlDataReader = sqlCommand.ExecuteReader();
        if (!sqlDataReader.Read()) return null;
        BalanceSheet balanceSheet=new BalanceSheet();
        balanceSheet.Symbol=sqlDataReader.GetString(0);
        balanceSheet.AsOf=sqlDataReader.GetDateTime(1);
        if (!sqlDataReader.IsDBNull(2))balanceSheet.LongTermDebt= sqlDataReader.GetDouble(2);
        if (!sqlDataReader.IsDBNull(3))balanceSheet.OtherLiabilities=sqlDataReader.GetDouble(3);
        if (!sqlDataReader.IsDBNull(4))balanceSheet.DeferredLongTermLiabilities=sqlDataReader.GetDouble(4);
        if (!sqlDataReader.IsDBNull(5))balanceSheet.MinorityInterest=sqlDataReader.GetDouble(5);
        if (!sqlDataReader.IsDBNull(6))balanceSheet.NegativeGoodwill=sqlDataReader.GetDouble(6);
        if (!sqlDataReader.IsDBNull(7)) balanceSheet.TotalStockHolderEquity = sqlDataReader.GetDouble(7);
        if (!sqlDataReader.IsDBNull(8)) balanceSheet.Inventory = sqlDataReader.GetDouble(8);
        if (!sqlDataReader.IsDBNull(9)) balanceSheet.PropertyPlantAndEquipment = sqlDataReader.GetDouble(9);
        if (!sqlDataReader.IsDBNull(10)) balanceSheet.IntangibleAssets = sqlDataReader.GetDouble(10);
        if (!sqlDataReader.IsDBNull(11)) balanceSheet.AccumulatedAmortization = sqlDataReader.GetDouble(11);
        if (!sqlDataReader.IsDBNull(12)) balanceSheet.Goodwill = sqlDataReader.GetDouble(12);
        if (!sqlDataReader.IsDBNull(13)) balanceSheet.Period = sqlDataReader.GetInt32(13) == 0 ? BalanceSheet.PeriodType.Annual : BalanceSheet.PeriodType.Quarterly;
        if (!sqlDataReader.IsDBNull(14)) balanceSheet.TotalAssets = sqlDataReader.GetDouble(14);
        if (!sqlDataReader.IsDBNull(15)) balanceSheet.TotalCurrentAssets = sqlDataReader.GetDouble(15);
        if (!sqlDataReader.IsDBNull(16)) balanceSheet.TotalLiabilities = sqlDataReader.GetDouble(16);
        if (!sqlDataReader.IsDBNull(17)) balanceSheet.TotalCurrentLiabilities = sqlDataReader.GetDouble(17);
        if (!sqlDataReader.IsDBNull(18)) balanceSheet.CashAndCashEquivalents = sqlDataReader.GetDouble(18);
        if (!sqlDataReader.IsDBNull(19)) balanceSheet.Modified = sqlDataReader.GetDateTime(19);
        return balanceSheet;
      }
      catch (Exception exception)
      {
        MDTrace.WriteLine(LogLevel.DEBUG,exception);
        return null;
      }
      finally
      {
				if(null!=sqlCommand)sqlCommand.Dispose();
        if (null != sqlDataReader) sqlDataReader.Close();
        if (null != sqlConnection) sqlConnection.Close();
      }
    }
    public static TimeSeriesCollection GetInventory(String symbol,BalanceSheet.PeriodType period)
    {
      TimeSeriesCollection timeSeriesCollection = new TimeSeriesCollection();
      MySqlConnection sqlConnection = null;
      MySqlDataReader sqlDataReader = null;
			MySqlCommand sqlCommand=null;
      String strQuery = null;

      try
      {
        StringBuilder sb = new StringBuilder();
        sqlConnection = SqlUtils.CreateMySqlConnection(MainDataSource.Instance.LocateDataSource("market_data"));
        sb.Append("select symbol,asof,inventory from balancesheet where symbol='").Append(symbol).Append("'").Append(" ");
        sb.Append(" and period=").Append(period.Equals(BalanceSheet.PeriodType.Annual) ? 0 : 1).Append(" order by asof desc;");
        strQuery = sb.ToString();
        sqlCommand = new MySqlCommand(strQuery, sqlConnection);
        sqlCommand.CommandTimeout = SqlUtils.COMMAND_TIMEOUT;
        sqlDataReader = sqlCommand.ExecuteReader();
        while (sqlDataReader.Read())
        {
          TimeSeriesElement timeSeriesElement = new TimeSeriesElement();
          timeSeriesElement.Symbol = sqlDataReader.GetString(0);
          timeSeriesElement.AsOf = sqlDataReader.GetDateTime(1);
          timeSeriesElement.Type = period.Equals(BalanceSheet.PeriodType.Quarterly) ? TimeSeriesElement.ElementType.QuarterlyInventory : TimeSeriesElement.ElementType.Inventory;
          if (!sqlDataReader.IsDBNull(2)) timeSeriesElement.Value = sqlDataReader.GetDouble(2);
          else continue;
          timeSeriesCollection.Add(timeSeriesElement);
        }
        return timeSeriesCollection;
      }
      catch (Exception exception)
      {
        MDTrace.WriteLine(LogLevel.DEBUG,exception);
        return null;
      }
      finally
      {
				if(null!=sqlCommand)sqlCommand.Dispose();
        if (null != sqlDataReader) sqlDataReader.Close();
        if (null != sqlConnection) sqlConnection.Close();
      }
    }
    public static TimeSeriesCollection GetGoodwill(String symbol, BalanceSheet.PeriodType period)
    {
      TimeSeriesCollection timeSeriesCollection = new TimeSeriesCollection();
      MySqlConnection sqlConnection = null;
      MySqlDataReader sqlDataReader = null;
			MySqlCommand sqlCommand=null;
      String strQuery = null;

      try
      {
        StringBuilder sb = new StringBuilder();
        sqlConnection = SqlUtils.CreateMySqlConnection(MainDataSource.Instance.LocateDataSource("market_data"));
        sb.Append("select symbol,asof,goodwill from balancesheet where symbol='").Append(symbol).Append("'").Append(" ");
        sb.Append(" and period=").Append(period.Equals(BalanceSheet.PeriodType.Annual) ? 0 : 1).Append(" order by asof desc;");
        strQuery = sb.ToString();
        sqlCommand = new MySqlCommand(strQuery, sqlConnection);
        sqlCommand.CommandTimeout = SqlUtils.COMMAND_TIMEOUT;
        sqlDataReader = sqlCommand.ExecuteReader();
        while (sqlDataReader.Read())
        {
          TimeSeriesElement timeSeriesElement = new TimeSeriesElement();
          timeSeriesElement.Symbol = sqlDataReader.GetString(0);
          timeSeriesElement.AsOf = sqlDataReader.GetDateTime(1);
          timeSeriesElement.Type = period.Equals(BalanceSheet.PeriodType.Quarterly) ? TimeSeriesElement.ElementType.QuarterlyInventory : TimeSeriesElement.ElementType.Inventory;
          if (!sqlDataReader.IsDBNull(2)) timeSeriesElement.Value = sqlDataReader.GetDouble(2);
          else continue;
          timeSeriesCollection.Add(timeSeriesElement);
        }
        return timeSeriesCollection;
      }
      catch (Exception exception)
      {
        MDTrace.WriteLine(LogLevel.DEBUG,exception);
        return null;
      }
      finally
      {
				if(null!=sqlCommand)sqlCommand.Dispose();
        if (null != sqlDataReader) sqlDataReader.Close();
        if (null != sqlConnection) sqlConnection.Close();
      }
    }
    public static TimeSeriesCollection GetTotalStockholderEquity(String symbol, BalanceSheet.PeriodType period)
    {
      TimeSeriesCollection timeSeriesCollection = new TimeSeriesCollection();
      MySqlConnection sqlConnection = null;
      MySqlDataReader sqlDataReader = null;
			MySqlCommand sqlCommand=null;
      String strQuery = null;

      try
      {
        StringBuilder sb = new StringBuilder();
        sqlConnection = SqlUtils.CreateMySqlConnection(MainDataSource.Instance.LocateDataSource("market_data"));
        sb.Append("select symbol,asof,total_stockholder_equity from balancesheet where symbol='").Append(symbol).Append("'").Append(" ");
        sb.Append(" and period=").Append(period.Equals(BalanceSheet.PeriodType.Annual) ? 0 : 1).Append(" order by asof desc;");
        strQuery = sb.ToString();
        sqlCommand = new MySqlCommand(strQuery, sqlConnection);
        sqlCommand.CommandTimeout = SqlUtils.COMMAND_TIMEOUT;
        sqlDataReader = sqlCommand.ExecuteReader();
        while (sqlDataReader.Read())
        {
          TimeSeriesElement timeSeriesElement = new TimeSeriesElement();
          timeSeriesElement.Symbol = sqlDataReader.GetString(0);
          timeSeriesElement.AsOf = sqlDataReader.GetDateTime(1);
          timeSeriesElement.Type = period.Equals(BalanceSheet.PeriodType.Quarterly) ? TimeSeriesElement.ElementType.QuarterlyInventory : TimeSeriesElement.ElementType.Inventory;
          if (!sqlDataReader.IsDBNull(2)) timeSeriesElement.Value = sqlDataReader.GetDouble(2);
          else continue;
          timeSeriesCollection.Add(timeSeriesElement);
        }
        return timeSeriesCollection;
      }
      catch (Exception exception)
      {
        MDTrace.WriteLine(LogLevel.DEBUG,exception);
        return null;
      }
      finally
      {
				if(null!=sqlCommand)sqlCommand.Dispose();
        if (null != sqlDataReader) sqlDataReader.Close();
        if (null != sqlConnection) sqlConnection.Close();
      }
    }
    public static bool InsertBalanceSheets(List<BalanceSheet> balanceSheets)
    {
      MySqlConnection sqlConnection = null;
      MySqlTransaction sqlTransaction = null;
      String strQuery = null;

      try
      {
        if(null==balanceSheets)return false;
        DateTime modified = DateTime.Now;
        sqlConnection = SqlUtils.CreateMySqlConnection(MainDataSource.Instance.LocateDataSource("market_data"));
        sqlTransaction = sqlConnection.BeginTransaction(System.Data.IsolationLevel.ReadCommitted);
        DeleteBalanceSheets(balanceSheets, sqlConnection, sqlTransaction);
        for (int index = 0; index < balanceSheets.Count; index++)
        {
          BalanceSheet balanceSheet = balanceSheets[index];
          StringBuilder sb = new StringBuilder();
          sb.Append("insert into balancesheet (symbol,asof,long_term_debt,other_liabilities,deferred_long_term_liabilities,minority_interest,negative_goodwill,total_stockholder_equity,inventory,property_plant_and_equipment,intangible_assets,accumulated_amortization,goodwill,period,total_assets,total_current_assets,total_liabilities,total_current_liabilities,cash_and_cash_equivalents,modified) ");
          sb.Append("values(");
          sb.Append("'").Append(balanceSheet.Symbol).Append("'").Append(",");
          sb.Append("'").Append(Utility.DateTimeToStringYYYYHMMHDD(balanceSheet.AsOf)).Append("'").Append(",");
          if (!Double.IsNaN(balanceSheet.LongTermDebt)) sb.Append(balanceSheet.LongTermDebt).Append(",");
          else sb.Append("null").Append(",");
          if (!Double.IsNaN(balanceSheet.OtherLiabilities)) sb.Append(balanceSheet.OtherLiabilities).Append(",");
          else sb.Append("null").Append(",");
          if (!Double.IsNaN(balanceSheet.DeferredLongTermLiabilities)) sb.Append(balanceSheet.DeferredLongTermLiabilities).Append(",");
          else sb.Append("null").Append(",");
          if (!Double.IsNaN(balanceSheet.MinorityInterest)) sb.Append(balanceSheet.MinorityInterest).Append(",");
          else sb.Append("null").Append(",");
          if (!Double.IsNaN(balanceSheet.NegativeGoodwill)) sb.Append(balanceSheet.NegativeGoodwill).Append(",");
          else sb.Append("null").Append(",");
          if (!Double.IsNaN(balanceSheet.TotalStockHolderEquity)) sb.Append(balanceSheet.TotalStockHolderEquity).Append(",");
          else sb.Append("null").Append(",");
          if (!Double.IsNaN(balanceSheet.Inventory)) sb.Append(balanceSheet.Inventory).Append(",");
          else sb.Append("null").Append(",");
          if (!Double.IsNaN(balanceSheet.PropertyPlantAndEquipment)) sb.Append(balanceSheet.PropertyPlantAndEquipment).Append(",");
          else sb.Append("null").Append(",");
          if (!Double.IsNaN(balanceSheet.IntangibleAssets)) sb.Append(balanceSheet.IntangibleAssets).Append(",");
          else sb.Append("null").Append(",");
          if (!Double.IsNaN(balanceSheet.AccumulatedAmortization)) sb.Append(balanceSheet.AccumulatedAmortization).Append(",");
          else sb.Append("null").Append(",");
          if (!Double.IsNaN(balanceSheet.Goodwill)) sb.Append(balanceSheet.Goodwill).Append(",");
          else sb.Append("null").Append(",");
          sb.Append(BalanceSheet.PeriodType.Annual.Equals(balanceSheet.Period)?0:1).Append(",");
          if (!Double.IsNaN(balanceSheet.TotalAssets)) sb.Append(balanceSheet.TotalAssets).Append(",");
          else sb.Append("null").Append(",");
          if (!Double.IsNaN(balanceSheet.TotalCurrentAssets)) sb.Append(balanceSheet.TotalCurrentAssets).Append(",");
          else sb.Append("null").Append(",");
          if (!Double.IsNaN(balanceSheet.TotalLiabilities)) sb.Append(balanceSheet.TotalLiabilities).Append(",");
          else sb.Append("null").Append(",");
          if (!Double.IsNaN(balanceSheet.TotalCurrentLiabilities)) sb.Append(balanceSheet.TotalCurrentLiabilities).Append(",");
          else sb.Append("null").Append(",");
          if (!Double.IsNaN(balanceSheet.CashAndCashEquivalents)) sb.Append(balanceSheet.CashAndCashEquivalents).Append(",");
          else sb.Append("null").Append(",");
          sb.Append("'").Append(Utility.DateTimeToStringYYYYHMMHDD(modified)).Append("'");
          sb.Append(")");
          strQuery = sb.ToString();
          MySqlCommand sqlCommand = new MySqlCommand(strQuery, sqlConnection, sqlTransaction);
          sqlCommand.CommandTimeout = SqlUtils.COMMAND_TIMEOUT;
          sqlCommand.ExecuteNonQuery();
					sqlCommand.Dispose();
        }
        sqlTransaction.Commit();
        return true;
      }
      catch (Exception exception)
      {
        MDTrace.WriteLine(LogLevel.DEBUG,exception);
        MDTrace.WriteLine(LogLevel.DEBUG,"Query was '"+strQuery+"'");
        return false;
      }
      finally
      {
        if (null != sqlTransaction) sqlTransaction.Dispose();
        if (null != sqlConnection) sqlConnection.Close();
      }
    }
    private static bool DeleteBalanceSheets(List<BalanceSheet> balanceSheets, MySqlConnection sqlConnection, MySqlTransaction sqlTransaction)
    {
      for (int index = 0; index < balanceSheets.Count; index++)
      {
        DeleteBalanceSheet(balanceSheets[index], sqlConnection, sqlTransaction);
      }
      return true;
    }
    private static bool DeleteBalanceSheet(BalanceSheet balanceSheet, MySqlConnection sqlConnection, MySqlTransaction sqlTransaction)
    {
      StringBuilder sb = new StringBuilder();
      String strQuery = null;

      try
      {
        sb.Append("delete from balancesheet where ");
        sb.Append("symbol='").Append(balanceSheet.Symbol).Append("'");
        sb.Append(" and ");
        sb.Append("asof='").Append(Utility.DateTimeToStringYYYYHMMHDD(balanceSheet.AsOf)).Append("'");
        sb.Append(" and period=").Append(balanceSheet.Period.Equals(BalanceSheet.PeriodType.Annual)?0:1);
        strQuery = sb.ToString();
        MySqlCommand sqlCommand = new MySqlCommand(strQuery, sqlConnection, sqlTransaction);
        sqlCommand.CommandTimeout = SqlUtils.COMMAND_TIMEOUT;
        sqlCommand.ExecuteNonQuery();
				sqlCommand.Dispose();
        return true;
      }
      catch (Exception exception)
      {
        sqlTransaction.Rollback();
        MDTrace.WriteLine(LogLevel.DEBUG,exception);
        if (null != strQuery) MDTrace.WriteLine(LogLevel.DEBUG,"Query was " + strQuery);
        return false;
      }
      finally
      {
      }
    }
  }
}