using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace crusherScanner
{
    internal static class SupportFunctions
    {
        /// <summary>
        /// Return a hash set of files in given folder.
        /// <code>
        /// GetFilesFromPath("c:\oreDefFiles\","ML??????*.csv");
        /// </code>
        /// </summary>
        /// <param name="Path">Path to search for files at.</param>
        /// <param name="Mask">Mask to check files against.</param>
        /// <returns>HashSet/<string/> of files in folder.</returns>
        public static HashSet<string> GetFilesFromPath(string Path,string Mask)
        {
            HashSet<string> files = new HashSet<string>();
            try
            {
                if (Directory.Exists(Path))
                {
                    // Pattern match is for 'ML003092.csv' or 'ML003092_20220822.csv' = "ML??????*.csv"
                    IEnumerable<string> jobFiles = Directory.EnumerateFiles(Path, Mask, SearchOption.TopDirectoryOnly);
                    foreach (string jobFile in jobFiles)
                    {
                        files.Add(jobFile);
                    }
                }
                else
                {
                    Logging.Append(LogLevel.Debug, $"Unable to get files from non existant 'Path' {Path}.");
                }
            }
            catch (Exception ex)
            {
                Logging.Append(LogLevel.Error ,"An error occurred." + ex.Message);
            }                                                                                                                                                     
            // return an empty HashSet if no files found
            return files;
        }
    }
}