Translator

using System;
using System.Linq;
using Translatory.Models;

namespace Translatory.Controllers
{
    public sealed class TranslateController
    {
        //Text
        private readonly string _text;

        //State
        private TranslateState _state;

        //Constructor
        public TranslateController(string text)
        {
            _text = text;
            _state = TranslateState.Normal;
            Analize();
        }

        public void Analize()
        {
            var idCombo = string.Empty;
            var numberCombo = string.Empty;
            var errorCombo = string.Empty;

            foreach (var sign in _text.Select((value, index) => new { value, index }))
            {
                //White space
                if (char.IsWhiteSpace(sign.value)) continue;

                //Check plus
                if (sign.value == '+' && _state == TranslateState.Normal) Console.WriteLine($"{sign.index + 1} -> Plus(+)");

                //Check minus
                else if (sign.value == '-' && _state == TranslateState.Normal) Console.WriteLine($"{sign.index + 1} -> Minus(-)");

                //Check multiply
                else if (sign.value == '*' && _state == TranslateState.Normal) Console.WriteLine($"{sign.index + 1} -> Multiply(*)");

                //Check divide
                else if (sign.value == '/' && _state == TranslateState.Normal) Console.WriteLine($"{sign.index + 1} -> Divide(/)");

                //Left bracket
                else if (sign.value == '(' && _state == TranslateState.Normal) Console.WriteLine($"{sign.index + 1} -> Left bracket(()");

                //Right bracket
                else if (sign.value == ')' && _state == TranslateState.Normal) Console.WriteLine($"{sign.index + 1} -> Right bracket())");

                //ID
                else if (char.IsLetter(sign.value) || _state == TranslateState.ID)
                {
                    _state = TranslateState.ID;

                    idCombo += sign.value;

                    if (sign.index == _text.Length - 1 || !char.IsLetterOrDigit(_text[sign.index + 1]))
                    {
                        Console.WriteLine($"{sign.index + 1} -> ID({idCombo})");
                        _state = TranslateState.Normal;
                        numberCombo = string.Empty;
                    }
                }

                else if (char.IsNumber(sign.value) || _state == TranslateState.Number)
                {
                    _state = TranslateState.Number;

                    numberCombo += sign.value;

                    if(sign.index < _text.Length - 2 && _text[sign.index + 1] == '.' && char.IsNumber(_text[sign.index + 2]) && numberCombo.Count(x=>x == '.') == 0) continue;

                    if (sign.index == _text.Length - 1 || !char.IsNumber(_text[sign.index + 1]) )
                    {
                        if (numberCombo.Contains("."))
                            Console.WriteLine($"{sign.index + 1} -> FLOAT({numberCombo})");
                        else
                            Console.WriteLine($"{sign.index + 1} -> INT({numberCombo})");

                        _state = TranslateState.Normal;
                        numberCombo = string.Empty;
                    }
                }

                else if (!char.IsLetterOrDigit(sign.value) || _state == TranslateState.Error)
                {
                    _state = TranslateState.Error;

                    errorCombo += sign.value;

                    if (sign.index == _text.Length - 1 || char.IsLetterOrDigit(_text[sign.index + 1]) || _text[sign.index + 1] == '+' || _text[sign.index + 1] == '-' || _text[sign.index + 1] == '*' || _text[sign.index + 1] == '/' || _text[sign.index + 1] == '(' || _text[sign.index + 1] == ')')
                    {
                        Console.WriteLine($"{sign.index + 1} -> ERROR({errorCombo})");
                        _state = TranslateState.Normal;
                        errorCombo = string.Empty;
                    }
                }
            }
        }
    }
}