using System;

using System.Collections.Generic;

​

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

    {

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

        {

            var uniqueWords = new HashSet<string>(words.Keys);

            return string.Join(delimiter, uniqueWords);

        }

​

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

        {

            var duplicates = new List<string>();

            var uniqueWords = new HashSet<string>();

            foreach ( var word in words.Keys)

            {

                if (!uniqueWords.Add(word))

                {

                    duplicates.Add(word);

                }

            }

            return duplicates;

        }

​

        public DuplicatesDTO[] ReturnDuplicatesDTO(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;

                }

            }

             var duplicatesDTOArray = new DuplicatesDTO[wordCounts.Count];

            var index = 0;

            foreach (var kvp in wordCounts)

            {

                var dto = new DuplicatesDTO

                {

                    Word = kvp.Key,

                    Count = kvp.Value

                };

                duplicatesDTOArray[index] = dto;

                index++;

            }

            return duplicatesDTOArray;

        }

    }

​

    public class DuplicatesDTO

    {

        public string Word { get; set; }

        public int? Count { get; set; }

    }

}

​