using Infragistics.Shared;
using Infragistics.Win;
using Infragistics.Win.UltraWinGrid;
using System.Diagnostics;
using System;
// A class that calculates the totals for orders.
namespace Core.StlMes.Client.BuyBillet
{
public  class OrderTotalsSummary : ICustomSummaryCalculator 
{
	private decimal totals = 0;
    private decimal totals1 = 0;
    private decimal totals2 = 0;
    private string column1;
    private string column2;
    private string column3;
	public  OrderTotalsSummary(string column1,string column2,string column3 )
	{
        this.column1 = column1;
        this.column2 = column2;
        this.column3 = column3;
	}

	public void BeginCustomSummary( SummarySettings summarySettings, RowsCollection rows )
	{

		// Begins the summary for the SummarySettings object passed in. Implementation of 
		// this method should reset any state variables used for calculating the summary.
		this.totals = 0;
        this.totals1 = 0;
        this.totals2 = 0;

	}

	public void AggregateCustomSummary( SummarySettings summarySettings, UltraGridRow row )
	{

		// Here is where we process each row that gets passed in.

        //object unitPrice = row.GetCellValue(summarySettings.SourceColumn.Band.Columns["FGSTYLG"]);
        //object unitPrice1 = row.GetCellValue(summarySettings.SourceColumn.Band.Columns["TSYLG"]);
        //object quantity = row.GetCellValue(summarySettings.SourceColumn.Band.Columns["MATERIALOUTYLG"]);
        object unitPrice = row.GetCellValue(summarySettings.SourceColumn.Band.Columns[column1]);
        object unitPrice1 = row.GetCellValue(summarySettings.SourceColumn.Band.Columns[column2]);
        object quantity = row.GetCellValue(summarySettings.SourceColumn.Band.Columns[column3]);

		// Handle null values
        if (unitPrice is DBNull || quantity is DBNull  )
		{
			return;
		}

		// Convert to decimal.
		try
		{
			decimal nUnitPrice = Convert.ToDecimal( unitPrice );
            decimal nUnitPrice1;
            if(unitPrice1 is DBNull)
            {
                nUnitPrice1 = 0;
            }
            else
            {
                nUnitPrice1 = Convert.ToDecimal(unitPrice1);
            }
			decimal nQuantity = Convert.ToDecimal( quantity );

            this.totals1 += nUnitPrice + nUnitPrice1;
            
            this.totals2 += nQuantity;
		}
		catch ( Exception )
		{
			// This should not happen if the columns are numeric.
			Debug.Assert( false, "Exception thrown while trying to convert cell's value to decimal !" );
		}

	}

	
	public object EndCustomSummary( SummarySettings summarySettings, RowsCollection rows )		
	{

		// This gets called when the every row has been processed so here is where we
		// would return the calculated summary value.
		
        if(totals2 ==0){
            return DBNull.Value;
        }
        return  Math.Round(this.totals1*1000/this.totals2,0);

	}
}
}