using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;

namespace MarkovGrams
{
	class MainClass
	{
		public static void Main(string[] args)
		{
			if(args.Length != 4)
			{
				Console.WriteLine("Usage:");
				Console.WriteLine("    ./MarkovGrams.exe <wordlist.txt> <order> <length> <count>");
				return;
			}

			string wordlistFilename = args[0];
			int order = int.Parse(args[1]);
			int desiredStringLength = int.Parse(args[2]);
			int count = int.Parse(args[3]);

			IEnumerable<string> words = File.ReadLines(wordlistFilename).SelectMany(word => word.Trim().Split(' '));
			IEnumerable<string> ngrams = NGrams.GenerateFlat(words, order);

			UnweightedMarkovChain chain = new UnweightedMarkovChain(ngrams);

			for(int i = 0; i < count; i++)
				Console.WriteLine(chain.Generate(desiredStringLength));
		}
	}
}