using System;

using System.Collections.Generic;

using System.Linq;

​

namespace CodingChallenge

{

    public class Program

    {

        public static void Main()

        {

            //Objective:

            ////Create a class which will parse through the input

​

            //Requirements:

            //Create three different outputs

            ////one for a string of unique words delimited by a parameterized character

            ////one for a List of only words which have duplicates

            ////one for an DTO Array of each word and populate the properties

​

            //Additional Notes:

            ////Do not modify the code contained in the Program class

​

            Console.WriteLine("Welcome to the Word Parser Coding Challenge");

            var wordParser = new WordParser();

            var words = GetWords();

​

            var distinctWordsDelimitedString = wordParser.ReturnUniqueWordsDelimited(words, delimiter: ",");

            Console.WriteLine("ReturnUniqueWordsDelimited returned a count of " + distinctWordsDelimitedString.Split(',').Length);

​

            var duplicateWordsList = wordParser.ReturnWordsWithDuplicatesList(words);

            Console.WriteLine("ReturnWordsWithDuplicatesList returned a count of " + duplicateWordsList.Count);

​

            var duplicatesDTOArray = wordParser.ReturnDuplicatesDTO(words);

            Console.WriteLine("ReturnDuplicatesDTO returned a count of " + duplicatesDTOArray.Length);

​

            Console.WriteLine("This concludes the Word Parser Coding Challenge!");

            Console.WriteLine("Thank you for participating!");

        }

​

        /// <summary>

        ///  Only use the first column, ignore the second column

        /// </summary>

        /// <returns></returns>

        public static Dictionary<string, string> GetWords()

        {

            var words = new Dictionary<string, string>();

            words.Add("policeman", "bad_data");

            words.Add("calculation", " ");

            words.Add("thread", "bad_data");

            words.Add("despair", "bad_data");

            words.Add("reflection", "bad_data");

            words.Add("penetrate", "bad_data");

            words.Add("conference", "bad_data");

            words.Add("worry", "bad_data");

            words.Add("divide", "bad_data");

            words.Add("organ", "bad_data");

            words.Add("limited", "bad_data");

            words.Add("smile", "bad_data");

            words.Add("strain", "bad_data");

            words.Add("expect", "bad_data");

            words.Add("alcohol", "bad_data");

            words.Add("moment", "");

            return words;

        }

    }

​

    public class WordParser

    {

        //Method to store words and their counts in a Dictionary

        private Dictionary<string,int> CountWords(Dictionary<string, string> words){

            var wordCounts= new Dictionary<string,int>();

            foreach(var word in words.Keys){

                if(wordCounts.ContainsKey(word)){

                    wordCounts[word]++;

                }

                else{

                    wordCounts[word]=1;

                }

            }

            return wordCounts;

        }

        public string ReturnUniqueWordsDelimited(Dictionary<string, string> words, string delimiter)

        {

            var uniqueWords = words.Keys.Distinct();

            return string.Join(delimiter, uniqueWords);

        }

​

        public List<string> ReturnWordsWithDuplicatesList(Dictionary<string, string> words)

        {

            var wordCounts=CountWords(words);

            return wordCounts.Where(word => word.Value>1).Select(word => word.Key).ToList();

        }

​

        public DuplicatesDTO[] ReturnDuplicatesDTO(Dictionary<string, string> words)

        {

            var wordCounts=CountWords(words);

            return wordCounts.Select(word => new DuplicatesDTO{Word = word.Key,Count=word.Value }).ToArray();

        }

    }

​

    public class DuplicatesDTO

    {

        public string Word { get; set; }

        public int? Count { get; set; }

    }

}

​