<Query Kind="Program">
  <NuGetReference>LinqToCsv</NuGetReference>
  <Namespace>LINQtoCSV</Namespace>
</Query>

void Main()
{
	var path = @"D:\Users\tlamb\Downloads";
	var utilizationFile = @"CI_Sepsis LOS - Pharmacy_All Physicians_Utilization_01-15-2021.csv"; 
	//@"CI_Sepsis LOS - Pharmacy_All Physicians_Utilization_01-14-2021.csv";
	var trackingDetailsFile = @"CI_Sepsis LOS - Pharmacy_01-14-2021 Tracking Details.csv";

	var inputFileDescription = new CsvFileDescription
	{
		SeparatorChar = ',',
		FirstLineHasColumnNames = true
	};

	var cc = new CsvContext();

	var trackingDetails = cc.Read<TrackingDetails>(Path.Combine(path, trackingDetailsFile), inputFileDescription)
	.GroupBy(td => td.Charge_Description, (g, d) => new Consolidated
	{
		Charge_Code = g,
		TotalDirectVariableCost = d.Sum(u => u.TotalDirectVariableCost)
	})
	.OrderBy(td => td.Charge_Code);

	var utilization = cc.Read<Utilization>(Path.Combine(path, utilizationFile), inputFileDescription)
	.GroupBy(u => u.Charge_Code, (g, d) => d.Select(u => new Consolidated
	{
		Charge_Code = u.Charge_Code,
		Baseline_TotalDirectVariableCost = u.Baseline_TotalDirectVariableCost,
		Tracking_TotalDirectVariableCost = u.Tracking_TotalDirectVariableCost
	}))
	.SelectMany(u => u)
	.OrderBy(u => u.Charge_Code);

	var consolidated = from td in utilization
					   join u in trackingDetails on td.Charge_Code equals u.Charge_Code into g
					   from x in g.DefaultIfEmpty()
					   select new Consolidated
					   {
						   Charge_Code = x?.Charge_Code ?? td.Charge_Code,
						   TotalDirectVariableCost = x?.TotalDirectVariableCost ?? 0.0d,
						   Baseline_TotalDirectVariableCost = td?.Baseline_TotalDirectVariableCost ?? 0.0d,
						   Tracking_TotalDirectVariableCost = td?.Tracking_TotalDirectVariableCost ?? 0.0d
					   };
	cc.Write(consolidated, Path.Combine(path, "consolidated.csv"), inputFileDescription);
}

// Define other methods and classes here
public class TrackingDetails
{
	public string Encounter { get; set; }
	public DateTime Admit_Date { get; set; }
	public DateTime Discharge_Date { get; set; }
	public string Physician { get; set; }
	public string Physician_Group { get; set; }
	public DateTime Date_of_Service { get; set; }
	public string Rollup { get; set; }
	public string Charge_Description { get; set; }
	public int UOS { get; set; }
	public string Unit_Direct_Variable_Cost { get; set; }
	public string Total_Direct_Variable_Cost { get; set; }
	public double TotalDirectVariableCost
	{
		get
		{
			return double.TryParse(Total_Direct_Variable_Cost.Replace("$", "").Replace("(", "-").Replace(")", ""), out var result) ? result : 0.0d;
		}
	}
}

public class Utilization
{
	public string Rollup { get; set; }
	public string Charge_Code { get; set; }
	public string Direct_Variable_Cost { get; set; }
	public string x { get; set; }
	public string Cases1 { get; set; }
	public string Quantity1 { get; set; }
	public string Pct_of_Total_Cases1 { get; set; }
	public string Qty_Used_Cases1 { get; set; }
	public string Cases2 { get; set; }
	public string Quantity2 { get; set; }
	public string Pct_of_Total_Cases2 { get; set; }
	public string Qty_Used_Cases2 { get; set; }
	public string Pct_of_Total_Cases3 { get; set; }
	public string Qty_Used_Cases3 { get; set; }
	public string b { get; set; }
	public string CostPerCase1 { get; set; }
	public string CostPerCase2 { get; set; }
	public string CostPerCase3 { get; set; }
	public string Total_Direct_Variable_Cost1 { get; set; }
	public string Total_Direct_Variable_Cost2 { get; set; }
	public string Total_Direct_Variable_Cost3 { get; set; }
	public double Baseline_TotalDirectVariableCost
	{
		get
		{
			return string.IsNullOrEmpty(Total_Direct_Variable_Cost1) ? 0.0d
			: double.TryParse(Total_Direct_Variable_Cost1.Replace("$-", "0").Replace("$", "").Replace("(", "-").Replace(")", ""), out var result) ? result : 0.0d;
		}
	}
	public double Tracking_TotalDirectVariableCost
	{
		get
		{
			return string.IsNullOrEmpty(Total_Direct_Variable_Cost2) ? 0.0d
			: double.TryParse(Total_Direct_Variable_Cost2.Replace("$-", "0").Replace("$", "").Replace("(", "-").Replace(")", ""), out var result) ? result : 0.0d;
		}
	}
}

public class Consolidated
{
	public string Charge_Code { get; set; }
	public double TotalDirectVariableCost { get; set; }
	public double Baseline_TotalDirectVariableCost { get; set; }
	public double Tracking_TotalDirectVariableCost { get; set; }
}