using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Diagnostics;
using System.Reflection;

namespace Yaulw.Other
{
    /// <remarks>
    /// Use the StackWalker to Find out what Method/Type Called you.
    /// This is useful for logging functions to know what method/type called the Logging Method.
    /// </remarksy>
    public static class StackWalker
    {
        /// <summary>
        /// Hard-Coded in Stack Frame count depending on how this Class is getting called,
        /// and how many frames we have to go up / down (use nPlusMinus)      
        /// </summary>
        public const int DEFAULT_STACK_FRAME_COUNT = 3;

        /// <summary>
        /// Use this to get the MethodName from the CallStack.
        /// This allows the calling method to know which method called it
        /// </summary>
        /// <param name="nPlusMinus">Use this to add/substract from the base stack level you want to retrieve</param>
        /// <returns>Returns the MethodName as specified by the CallStack</returns>
        public static string GetMethodNameFromStack(int nPlusMinus = 0)
        {
            StackTrace stackTrace = new StackTrace();
            StackFrame stackFrame;
            MethodBase stackFrameMethod;

            stackFrame = stackTrace.GetFrame(DEFAULT_STACK_FRAME_COUNT + nPlusMinus);
            stackFrameMethod = stackFrame.GetMethod();
            return stackFrameMethod.Name;
        }

        /// <summary>
        /// Use this to get the Type from the CallStack.
        /// This allows the calling method to know which type called it.
        /// </summary>
        /// <param name="nPlusMinus">Use this to add/substract from the base stack level you want to retrieve</param>
        /// <returns>Returns the Type as specified by the CallStack</returns>
        public static Type GetTypeFromStack(int nPlusMinus = 0)
        {
            StackTrace stackTrace = new StackTrace();
            StackFrame stackFrame;
            MethodBase stackFrameMethod;

            stackFrame = stackTrace.GetFrame(DEFAULT_STACK_FRAME_COUNT + nPlusMinus);
            stackFrameMethod = stackFrame.GetMethod();
            return stackFrameMethod.ReflectedType;
        }

    }
}