//	Spludlow Software
//	Copyright © Samuel P. Ludlow 2020 All Rights Reserved
//	Distributed under the terms of the GNU General Public License version 3
//	Distributed WITHOUT ANY WARRANTY; without implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE
//	https://www.spludlow.co.uk/LICENCE.TXT
//	The Spludlow logo is a registered trademark of Samuel P. Ludlow and may not be used without permission
//	v1.14

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

using System.Data;

namespace Spludlow
{
	public class SpeedProfile
	{
		private DateTime StartTime;

		private DataTable ResultsTable;

		private DataRow CurrentRow = null;

		private int StartColumn;

		public SpeedProfile(string tableName)	//, string[] varibleNames)
		{
			this.ResultsTable = new DataTable(tableName);

			this.ResultsTable.Columns.Add("SampleId", typeof(int));
			this.ResultsTable.Columns["SampleId"].AutoIncrement = true;

			this.ResultsTable.Columns.Add("SampleName", typeof(string));
			
			this.StartColumn = this.ResultsTable.Columns.Count;

			//if (varibleNames != null)	// test speed difenrce
			//{
			//	foreach (string varibleName in varibleNames)
			//		this.ResultsTable.Columns.Add(varibleName, typeof(TimeSpan));
			//}

			this.Reset();
		}

		public void Reset()
		{
			this.StartTime = DateTime.Now;
		}

		public void NewSample()
		{
			this.NewSample("");
		}

		public void NewSample(string sampleName)
		{
			this.CurrentRow = null;
			this.GetCurrent();

			this.CurrentRow["SampleName"] = sampleName;

			this.Reset();
		}

		public void Submit(string varibleName)
		{
			DateTime endTime = DateTime.Now;
			
			this.GetCurrent();

			if (this.ResultsTable.Columns.Contains(varibleName) == false)
				this.ResultsTable.Columns.Add(varibleName, typeof(TimeSpan));

			this.CurrentRow[varibleName] = endTime - this.StartTime;

			this.Reset();
		}

		//public void Next()
		//{
		//	this.CurrentRow = null;
		//	this.GetCurrent();

		//	this.Reset();
		//}

		public void LogReport(string subject)
		{
			LogResults("R", subject);
		}
		public void LogFinish(string subject)
		{
			LogResults("F", subject);
		}
		private void LogResults(string logType, string subject)
		{
			if (this.ResultsTable.Rows.Count == 0)
			{
				Spludlow.Log.Report(subject + ", Total Took empty");
				return;
			}

			this.ResultsTable.Columns.Add("TOTAL", typeof(TimeSpan));

			foreach (DataRow row in this.ResultsTable.Rows)
			{
				TimeSpan totalSpan = TimeSpan.Zero;

				for (int colIndex = this.StartColumn; colIndex < (this.ResultsTable.Columns.Count - 1); ++colIndex)
				{
					if (row.IsNull(colIndex) == false)
						totalSpan += (TimeSpan)row[colIndex];
				}

				row["TOTAL"] = totalSpan;
			}

			if (this.ResultsTable.Rows.Count > 1)
			{
				DataRow totalRow = this.ResultsTable.NewRow();

				totalRow["SampleName"] = "TOTAL";
				for (int coloumnIndex = this.StartColumn; coloumnIndex < this.ResultsTable.Columns.Count; ++coloumnIndex)
					totalRow[coloumnIndex] = TimeSpan.Zero;

				foreach (DataRow row in this.ResultsTable.Rows)
				{
					for (int colIndex = this.StartColumn; colIndex < this.ResultsTable.Columns.Count; ++colIndex)
					{
						TimeSpan rowSpan = TimeSpan.Zero;

						if (row.IsNull(colIndex) == false)
							rowSpan = (TimeSpan)row[colIndex];

						totalRow[colIndex] = rowSpan + (TimeSpan)totalRow[colIndex];
					}
				}

				this.ResultsTable.Rows.Add(totalRow);
			}

			DataRow lastRow = Spludlow.Data.ADO.LastRow(this.ResultsTable);
			string totalTook = Spludlow.Text.TimeTook((TimeSpan)lastRow["TOTAL"]);

			Spludlow.Log.Submit(logType, subject + ", Speed Profile Logged Took:" + totalTook, new object[] { this.ResultsTable });
		}

		private void GetCurrent()
		{
			if (this.CurrentRow == null)
			{
				this.CurrentRow = this.ResultsTable.NewRow();
				for (int coloumnIndex = this.StartColumn; coloumnIndex < this.ResultsTable.Columns.Count; ++coloumnIndex)
					this.CurrentRow[coloumnIndex] = TimeSpan.Zero;

				this.ResultsTable.Rows.Add(this.CurrentRow);
			}
		}
	}
}