animal center oop exam engine class

namespace AnimalCenter.Models.BaseModels
{
    using System;
    using System.Linq;
    using System.Reflection;
    using Interfaces;
    using IO.Interfaces;

    public class Engine
    {
        public Engine(IInputReader reader, IOutputWriter writer, IAnimalCentre centre)
        {
            this.Writer = writer;

            this.Reader = reader;

            this.Centre = centre;
        }

        public IOutputWriter Writer { get; set; }

        public IInputReader Reader { get; set; }

        public IAnimalCentre Centre { get; set; }

        public void Run()
        {
            string input = string.Empty;
            while ((input = Reader.Read()) != "End")
            {
                string[] tokens = input.Split().ToArray();

                var command = tokens[0];
                try
                {
                    var methods = this.Centre.GetType().GetRuntimeMethods();

                    var method = methods.First(x => x.Name == command);

                    var parameters = method.GetParameters();

                    var inputparams = tokens.Skip(1).ToArray();

                    var objarr = new object[parameters.Length];

                    for (int i = 0; i < inputparams.Length; i++)
                    {
                        var convertTo = parameters[i].ParameterType;

                        var paramOfMethod = Convert.ChangeType(inputparams[i], convertTo);

                        objarr[i] = paramOfMethod;
                    }

                    var result = method.Invoke(this.Centre, objarr).ToString();
                    Writer.Write(result);

                    //int procedureTime = 0;
                    //string name = string.Empty;
                    //switch (command)
                    //{
                    //    case "RegisterAnimal":

                    //        string type = tokens[1];
                    //        name = tokens[2];
                    //        int energy = int.Parse(tokens[3]);
                    //        int happiness = int.Parse(tokens[4]);
                    //        procedureTime = int.Parse(tokens[5]);

                    //        Writer.Write(this.Centre.RegisterAnimal(type, name, energy, happiness, procedureTime));
                    //        break;

                    //    case "Chip":
                    //        name = tokens[1];
                    //        procedureTime = int.Parse(tokens[2]);
                    //        Writer.Write(this.Centre.Chip(name, procedureTime));
                    //        break;

                    //    case "Vaccinate":
                    //        name = tokens[1];
                    //        procedureTime = int.Parse(tokens[2]);
                    //        Writer.Write(this.Centre.Vaccinate(name, procedureTime));
                    //        break;

                    //    case "Fitness":
                    //        name = tokens[1];
                    //        procedureTime = int.Parse(tokens[2]);
                    //        Writer.Write(this.Centre.Fitness(name, procedureTime));
                    //        break;

                    //    case "Play":
                    //        name = tokens[1];
                    //        procedureTime = int.Parse(tokens[2]);
                    //        Writer.Write(this.Centre.Play(name, procedureTime));
                    //        break;

                    //    case "DentalCare":
                    //        name = tokens[1];
                    //        procedureTime = int.Parse(tokens[2]);
                    //        Writer.Write(this.Centre.DentalCare(name, procedureTime));
                    //        break;

                    //    case "NailTrim":
                    //        name = tokens[1];
                    //        procedureTime = int.Parse(tokens[2]);
                    //        Writer.Write(this.Centre.NailTrim(name, procedureTime));
                    //        break;

                    //    case "Adopt":
                    //        name = tokens[1];
                    //        string owner = tokens[2];
                    //        Writer.Write(this.Centre.Adopt(name, owner));
                    //        break;

                    //    case "History":
                    //        string procedure = tokens[1];
                    //        Writer.Write(this.Centre.History(procedure));
                    //        break;

                    //    default:
                    //        throw new InvalidOperationException(GlobalConstants.NotLegalAction);
                    //}
                }
                catch (ArgumentException e)
                {
                    this.Writer.Write(e.Message);
                }
                catch (InvalidOperationException e)
                {
                    this.Writer.Write(e.Message);
                }
                catch (TargetInvocationException e)
                {
                    this.Writer.Write(e.InnerException.Message);
                }
            }

            this.Writer.Write(End());
        }

        protected string End()
        {
            var stringResult = this.Centre.GetAnimalsAndOwners();

            return stringResult;
        }
    }
}