using System;

using Diagnostics = System.Diagnostics;
using Win32Exception = System.ComponentModel.Win32Exception;
using Path = System.IO.Path;

namespace ProcessInfo
{
	public class Process
	{
		private String name;
		private int pid;
		private long workingSet;

		private Process()
		{
		}

		public Process( Diagnostics.Process process )
		{
			if ( process == null )
			{
				throw new ArgumentNullException( "process" );
			}

			this.pid = process.Id;
			this.workingSet = process.WorkingSet64;

			if ( process.Id == 0 )
			{
				// the process name is "Idle"; special case so it appears the same as task manager
				name = "System Idle Process";
			}
			else
			{
				try
				{
					name = process.MainModule.ModuleName;
				}
				catch ( Win32Exception )
				{
					// some system processes don't have a main module; instead use the process name
					name = process.ProcessName;
				}
			}
		}

		public override String ToString()
		{
			return name;
		}

		public int Pid
		{
			get { return pid; }
		}

		public String Name
		{
			get { return name; }
		}

		public String NameWithoutExtension
		{
			get { return Path.GetFileNameWithoutExtension( Name ); }
		}

		public long WorkingSet
		{
			get { return workingSet; }
		}
	}
}