using System;

using SabreTools.Library.Data;

namespace SabreTools.Library.Tools
{
	/// <summary>
	/// Stopwatch class for keeping track of duration in the code
	/// </summary>
	public class InternalStopwatch
	{
		private string _subject;
		private DateTime _startTime;

		/// <summary>
		/// Constructor that initalizes the stopwatch
		/// </summary>
		public InternalStopwatch()
		{
			_subject = "";
		}

		/// <summary>
		/// Constructor that initalizes the stopwatch with a subject and starts immediately
		/// </summary>
		/// <param name="subject">Subject of the stopwatch</param>
		public InternalStopwatch(string subject)
		{
			_subject = subject;
			Start();
		}

		/// <summary>
		/// Constructor that initalizes the stopwatch with a subject and starts immediately
		/// </summary>
		/// <param name="subject">Subject of the stopwatch</param>
		/// <param name="more">Parameters to format the string</param>
		public InternalStopwatch(string subject, params object[] more)
		{
			_subject = string.Format(subject, more);
			Start();
		}

		/// <summary>
		/// Start the stopwatch and display subject text
		/// </summary>
		public void Start()
		{
			_startTime = DateTime.Now;
			Globals.Logger.User("{0}...", _subject);
		}

		/// <summary>
		/// Start the stopwatch and display subject text
		/// </summary>
		/// <param name="subject">Text to show on stopwatch start</param>
		public void Start(string subject)
		{
			_subject = subject;
			Start();
		}

		/// <summary>
		/// Start the stopwatch and display subject text
		/// </summary>
		/// <param name="subject">Text to show on stopwatch start</param>
		/// <param name="more">Parameters to format the string</param>
		public void Start(string subject, params object[] more)
		{
			_subject = string.Format(subject, more);
			Start();
		}

		/// <summary>
		/// End the stopwatch and display subject text
		/// </summary>
		public void Stop()
		{
			Globals.Logger.User("{0} completed in {1}", _subject, DateTime.Now.Subtract(_startTime).ToString(@"hh\:mm\:ss\.fffff"));
		}
	}
}