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

namespace WordCount
{
    struct Wordcount
    {
        public string word;
        public int count;
    }

    class Program
    {
        static void Main(string[] args)
        {
            Wordcount[] wordCount = new Wordcount[2000];

            string inputLine;
            string inputFilePath;

            FileStream inputFileStream;
            StreamReader streamReader;

            Console.WriteLine(@"Enter input file path (EX: I:\mccleary\Outbox\cs313 shared files\Jesus Prayer.txt): ");
            inputFilePath = Console.ReadLine();
            Console.WriteLine("\n\n");

            try
            {
                inputFileStream = new FileStream(inputFilePath, FileMode.Open);
                streamReader = new StreamReader(inputFileStream);
            }
            catch (IOException e)
            {
                Console.WriteLine("An IO exception has been thrown while opening the input file!");
                Console.WriteLine(e.ToString());
                Console.Write("\n\n Hit any key to exit program");
                Console.ReadKey();
                return;
            }

            inputLine = streamReader.ReadLine();
            while (inputLine != null)
            {
                inputLine = inputLine.ToLower().Trim();

                for (int i = 0; i < inputLine.Length; i++)
                {
                    char currentChar = inputLine[i];
                    if (currentChar != ' ' && (!Char.IsLetter(currentChar)))
                    {
                        inputLine = inputLine.Replace(currentChar, ' ');
                    }
                }

                string[] words = inputLine.Split(' ');

                foreach (string inputWord in words)
                {
                    if(inputWord.Length > 0)
                    {
                        for (int i = 0; i < wordCount.Length; i++ )
                        {

                            if (wordCount[i].word == null)
                            {
                                wordCount[i].count++;
                                wordCount[i].word = inputWord;
                                i = wordCount.Length;
                            }
                            else if (wordCount[i].word.Equals(inputWord))
                            {
                                wordCount[i].count++;
                                i = wordCount.Length;
                            }
                            else
                            {
                            }
                        }
                    }
                }                      
                inputLine = streamReader.ReadLine();
            }
            streamReader.Close();

            for (int i = 0; i < wordCount.Length; i++)
            {
                if (wordCount[i].word != null)
                {
                    Console.WriteLine(wordCount[i].word + "   " + wordCount[i].count);
                }
                else
                {
                    i = wordCount.Length;
                }
            }

            Console.Write("\n\n Hit any key to exit program");
            Console.ReadKey();
        }
    }
}