using Mono.Cecil;
using System;
using Mono.Cecil.Cil;

namespace AssemblyPather
{
    class Program
    {
#pragma warning disable 0618
        static void Main(string[] args)
        {

            ModuleDefinition module = null;
            Console.WriteLine("Loading...");
            try
            {
                module = ModuleDefinition.ReadModule("../../AssemblyPather.exe");
            }
            catch
            {
                Console.WriteLine("Cant find assembly.");
                return;
            }
            try
            {
                TypeDefinition type = type = new TypeDefinition("AssemblyPather","Injected",TypeAttributes.Public,module.Import(typeof(UnityEngine.MonoBehaviour)));
                module.Types.Add(type);
                var method = new MethodDefinition("OnGUI",MethodAttributes.Public ,module.Import(typeof(void)));

                //Instruction 1
                Instruction IL1 = method.Body.GetILProcessor().Create(OpCodes.Ldc_I4_S, 105);
                method.Body.GetILProcessor().InsertAfter(method.Body.Instructions[0], IL1);

                //Instruction 2
                Instruction IL2 = method.Body.GetILProcessor().Create(OpCodes.Call,UnityEngine.Input.GetKeyDown);
                method.Body.GetILProcessor().InsertAfter(method.Body.Instructions[1], IL2);

                //Add the method
                type.Methods.Add(method);
                //method.Parameters.Add(new ParameterDefinition(module.Import(typeof(string))));
                Console.WriteLine("Assembly has been patched!");
                module.Write("../../Assembly.exe");
            }
            catch(Exception e)
            {
                Console.WriteLine("ERROR: "+e.ToString());
            }

            Console.ReadLine();
        }
    }
}