using System;
using System.Diagnostics;
using System.Runtime.CompilerServices;

namespace Sarand.Net.Standard.Base.Utils
{
	//=======================================================================
	public static class SysUtil
	{
		//-------------------------------------------------------------------
		/// <summary>Get calling code's class name.</summary>
		/// <returns></returns>
		[MethodImpl(MethodImplOptions.NoInlining)]
		public static string GetCallerClassName()
		{
			try
			{
				var stackFrame = new StackTrace().GetFrame(1);
				var methodInfo = stackFrame.GetMethod();
				return methodInfo.ReflectedType.Name.TrimWhitespace();
			}
			catch (Exception) { }
			return "";
		}

		/// <summary>Get calling code's function name.</summary>
		[MethodImpl(MethodImplOptions.NoInlining)]
		public static string GetCallerMemberName([CallerMemberName] string memberName = "")
		{
			return memberName;
		}

		/// <summary>Get calling code's file path.</summary>
		[MethodImpl(MethodImplOptions.NoInlining)]
		public static string GetCallerFilePath([CallerFilePath] string filePath = "")
		{
			return filePath;
		}

		/// <summary>Get calling code's line number.</summary>
		[MethodImpl(MethodImplOptions.NoInlining)]
		public static int GetCallerLineNumber([CallerLineNumber] int lineNumber = 0)
		{
			return lineNumber;
		}

		//-------------------------------------------------------------------
		/// <summary>Shortcut to GetCallerClassMethod() - returns [class.method] for calling code.</summary>
		public static string Fn { get { return GetCallerClassMethod(2); } }

		/// <summary>Return identity of calling method as [class.method].</summary>
		[MethodImpl(MethodImplOptions.NoInlining)]
		public static string GetCallerClassMethod(int stackFrameIdx = 1)
		{
			try
			{
				var stackFrame = new StackTrace().GetFrame(stackFrameIdx);
				var methodInfo = stackFrame.GetMethod();
				return (methodInfo.ReflectedType.Name + "." + methodInfo.Name).TrimWhitespace().Trim('.');
			}
			catch (Exception) { }
			return "";
		}

		//-------------------------------------------------------------------
		/// <summary>Return identity of calling method as [class.method:line].</summary>
		[MethodImpl(MethodImplOptions.NoInlining)]
		public static string GetCallerClassMethodLine()
		{
			try
			{
				var stackFrame = new StackTrace().GetFrame(1);
				var methodInfo = stackFrame.GetMethod();
				return (methodInfo.ReflectedType.Name + "." + methodInfo.Name + ":" + stackFrame.GetFileLineNumber()).TrimWhitespace().Trim('.');
			}
			catch (Exception) { }
			return "";
		}

		//-------------------------------------------------------------------
	}
	//=======================================================================
}