/// <summary>
/// Sorts file by batches. Splits to batches, sorts it and writes in temp files.
/// Then merge temp files and sorts during the splitting. Writes to output sorted file.
/// </summary>
private static void Sort(
string fileName, long fileSize, string sortFilePath, ISorter sorter, Stopwatch timer)
{
char[] chars = Settings.Chars.ToArray();
Console.WriteLine("File size too big - splitting and sorting batches of the file....");
var batchService = new BatchService(
fileName,
fileSize,
new BatchCreator(chars),
new BatchWriter(),
sorter);
BatchInfo[] batches = batchService.Execute();
Console.WriteLine($"The file was batched to '{batches.Length}' peaces: {timer.Elapsed:g}.");
Console.WriteLine("Merging...");
var mergeService = new MergeService(sortFilePath, chars, sorter, new Comparer());
mergeService.Merge(batches);
}