using Roslyn.Scripting;
using Roslyn.Scripting.CSharp;
using System.Collections.Generic;
using System.IO;
using System.Text.RegularExpressions;

namespace Filterer
{
    internal class Program
    {
        private static Regex regex = new Regex(@"myLib\.Translate\(([^)]*)\)", RegexOptions.Compiled);
        private static ISet<string> translationStrings = new HashSet<string>();
        private static ScriptEngine scriptEngine = new ScriptEngine();
        private static Session session = scriptEngine.CreateSession();

        private static void Main(string[] args)
        {
            string rootFolder = @"C:\XXX";
            TreatDirectory(rootFolder);

            // schreibt alle gesammelten translation strings in das File mit folgendem Pfad
            string outputFilePath = "";
            File.WriteAllLines(outputFilePath, translationStrings);
        }

        private static void TreatDirectory(string path)
        {
            // scannt nur Dateien die mit .cs enden
            foreach (string filePath in Directory.EnumerateFiles(path, "*.cs"))
                TreatFile(filePath);

            foreach (string directoryPath in Directory.EnumerateDirectories(path))
                TreatDirectory(directoryPath);
        }

        private static void TreatFile(string path)
        {
            using (var streamReader = new StreamReader(path))
            {
                string line;
                while ((line = streamReader.ReadLine()) != null)
                    TreatLine(line);
            }
        }

        private static void TreatLine(string line)
        {
            if (line.Contains("myLib.Translate("))
            {
                string rawTranslationString = regex.Match(line).Groups[1].Value;
                translationStrings.Add(session.Execute<string>(rawTranslationString));
            }
        }
    }
}