WordGame.cs

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

namespace WordGame
{
    class MainClass
    {
        public static string VOWELS = "aeiou";
        public static string CONSONANTS = "bcdfghjklmnpqrstvwxyz";
        public static int HANDSIZE = 7;
        public static Dictionary<char, int> SCRABBLE_LETTER_VALUES = new Dictionary<char, int>()
        {
            { 'a', 1 }, { 'b', 3 }, { 'c', 3 }, { 'd', 2 }, { 'e', 1 },
            { 'f', 4 }, { 'g', 2 }, { 'h', 4 }, { 'i', 1 }, { 'j', 8 },
            { 'k', 5 }, { 'l', 1 }, { 'm', 3 }, { 'n', 1 }, { 'o', 1 },
            { 'p', 3 }, { 'q', 10 }, { 'r', 1 }, { 's', 1 }, { 't', 1 },
            { 'u', 1 }, { 'v', 4 }, { 'w', 4 }, { 'x', 8 }, { 'y', 4 },
            { 'z', 10 }
        };

        public static void Main(string[] args)
        {
            List<string> wordList = LoadWords();
            Dictionary<char, int> handOne = new Dictionary<char, int>()
            {
                { 'h',1}, {'i',1}, {'c',1}, {'z',1}, {'m',2}, {'a',1}
            };
            Dictionary<char, int> handTwo = new Dictionary<char, int>()
            {
                {'w',1}, { 's',1}, {'t',2 }, { 'a',1}, { 'o',1}, {'f',1}
            };
            Dictionary<char, int> handThree = new Dictionary<char, int>()
            {
                { 'n',1}, { 'e',1}, { 't',1}, { 'a',1}, {'r',1}, {'i',2}
            };

            // PlayHand(handOne, wordList, 7);
            // PlayHand(handTwo, wordList, 7);
            // PlayHand(handThree, wordList, 7);
            PlayGame(wordList);

            Console.ReadKey();
        }

        public static List<string> LoadWords()
        {
            Console.WriteLine("Loading word list from file...");

            string[] lines = System.IO.File.ReadAllLines(@"C:\Users\Armando\Documents\Online Courses\MITx 6.00.1x Introduction to Computer Science and Programming Using Python\Week 4\words.txt");
            List<string> wordList = new List<string>();

            foreach (string line in lines)
            {
                if (!string.IsNullOrEmpty(line) || !string.IsNullOrWhiteSpace(line))
                {
                    wordList.Add(line.Trim().ToLower());
                }
            }

            Console.WriteLine(" " + wordList.Count + "words loaded");

            return wordList;
        }

        public static Dictionary<char, int> GetFequencyDict(string sequence)
        {
            Dictionary<char, int> freq = new Dictionary<char, int>();

            foreach (var i in sequence)
            {
                freq[i] = freq.Where(x => x.Key == i).SingleOrDefault().Value + 1;
            }

            return freq;
        }

        public static int GetWordScore(string word, int n)
        {
            int score = 0;

            foreach (var i in word)
            {
                score += SCRABBLE_LETTER_VALUES[i];
            }

            score *= word.Length;

            if (word.Length == n)
            {
                score += 50;
            }

            return score;
        }

        public static void DisplayHand(Dictionary<char, int> hand)
        {
            foreach (var letter in hand.Keys)
            {
                foreach (var j in RangePython(hand[letter]))
                {
                    Console.Write(letter + "");
                }
            }
            Console.WriteLine("");
        }

        public static Dictionary<char, int> DealHand(int n)
        {
            Random rand = new Random();
            Dictionary<char, int> hand = new Dictionary<char, int>();

            int numVowels = n / 3;
            char x;

            foreach (var i in RangePython(numVowels))
            {
                x = VOWELS[rand.Next(0, VOWELS.Length)];
                hand[x] = hand.Where(y => y.Key == x).SingleOrDefault().Value + 1;
            }

            foreach (var i in RangePython(numVowels, n))
            {
                x = CONSONANTS[rand.Next(0, CONSONANTS.Length)];
                hand[x] = hand.Where(y => y.Key == x).SingleOrDefault().Value + 1;
            }

            return hand;
        }

        public static Dictionary<char, int> UpdateHand(Dictionary<char, int> hand, string word)
        {
            Dictionary<char, int> copyHand = new Dictionary<char, int>(hand);

            foreach (var i in word)
            {
                copyHand[i] -= 1;
            }

            return copyHand;
        }

        public static bool IsValidWord(string word, Dictionary<char, int> hand, List<string> wordList)
        {
            Dictionary<char, int> copyHand = new Dictionary<char, int>(hand);
            string auxWord = "";

            foreach (var i in word)
            {
                if (copyHand.Keys.Contains(i) && copyHand[i] > 0)
                {
                    auxWord += i;
                    copyHand[i] -= 1;
                }
            }

            foreach (var item in wordList)
            {
                if (item.Equals(auxWord.ToLower()))
                {
                    return true;
                }
            }

            return false;
        }

        public static int CalculateHandLen(Dictionary<char, int> hand)
        {
            int count = 0;

            foreach (var item in hand.Keys)
            {
                count += hand[item];
            }

            return count;
        }

        public static void PlayHand(Dictionary<char, int> hand, List<string> wordList, int n)
        {
            int totalScore = 0;
            string userInput = "";

            while (CalculateHandLen(hand) >= 0)
            {
                Console.Write("Current hand: ");
                DisplayHand(hand);

                Console.Write("Enter word, or a \".\" to indicate that you are finished: ");
                userInput = Console.ReadLine();

                if (userInput == ".")
                {
                    Console.WriteLine("Goodbye! Total score: " + totalScore + " points.");
                    break;
                }
                else if (!IsValidWord(userInput, hand, wordList))
                {
                    Console.WriteLine("Invalid word, please try again.");
                    Console.WriteLine("");
                }
                else
                {
                    totalScore += GetWordScore(userInput, n);
                    Console.WriteLine(userInput + " earned: " + GetWordScore(userInput, n) + ". Total: " + totalScore + " points.");
                    Console.WriteLine("");

                    hand = UpdateHand(hand, userInput);
                }

                if (CalculateHandLen(hand) == 0)
                {
                    Console.WriteLine("Run out of letters. Total score: " + totalScore + " points.");
                    break;
                }
            }
        }

        public static void PlayGame(List<string> wordList)
        {
            int n = HANDSIZE;
            Dictionary<char, int> hand = DealHand(n);
            string userInput;
            int counter = 0;

            ReturnHere:
            Console.Write("Enter \"n\" to deal a new hand, \"r\" to replay the last hand, or \"e\" to end game: ");
            userInput = Console.ReadLine();

            switch (userInput)
            {
                case "n":
                    PlayHand(hand, wordList, n);
                    counter += 1;
                    break;
                case "r":
                    if(counter > 0)
                    {
                        PlayHand(hand, wordList, n);
                        counter += 1;
                    }
                    else
                    {
                        Console.WriteLine("You have not played a hand yet. Please play a new hand first.");
                        goto ReturnHere;
                    }
                    break;
                case "e":
                    break;
                default:
                    Console.WriteLine("Invalid command!");
                    goto ReturnHere;
            }
        }

        /*
         * Custom Range()
         * provided on Stack Overflow
         */

        public static IEnumerable<int> RangePython(int start, int stop, int step = 1)
        {
            if (step == 0)
                throw new ArgumentException("Parameter step cannot equal zero.");

            if (start < stop && step > 0)
            {
                for (var i = start; i < stop; i += step)
                {
                    yield return i;
                }
            }
            else if (start > stop && step < 0)
            {
                for (var i = start; i > stop; i += step)
                {
                    yield return i;
                }
            }
        }

        public static IEnumerable<int> RangePython(int stop)
        {
            return RangePython(0, stop);
        }
    }
}