private static List <string> DigitalWordGenerator(int[] digits)
{
var file = new System.IO.StreamReader("../../resources/4letterword.txt");
var stateMachine = new StateMachine('0');
string word;
while ((word = file.ReadLine()) != null)
{
stateMachine.AddElement(word);
}
file.Close();
var digitToLetters = new Dictionary <int, char[]>()
{
{ 2, new char[] { 'a', 'b', 'c' } },
{ 3, new char[] { 'd', 'e', 'f' } },
{ 4, new char[] { 'g', 'h', 'i' } },
{ 5, new char[] { 'j', 'k', 'l' } },
{ 6, new char[] { 'm', 'n', 'o' } },
{ 7, new char[] { 'p', 'q', 'r', 's' } },
{ 8, new char[] { 't', 'u', 'v' } },
{ 9, new char[] { 'w', 'y', 'y', 'z' } }
};
var letters = new char[4][];
for (int i = 0; i < digits.Length; i++)
{
if (digitToLetters.ContainsKey(digits[i]))
{
letters[i] = digitToLetters[digits[i]];
}
else
{
throw new Exception($"{digits[i]} is not a valid digit");
}
}
string composeWord = "";
var validWords = new List <string>();
for (int i = 0; i < letters[0].Length; i++)
{
composeWord += letters[0][i];
for (int j = 0; j < letters[1].Length; j++)
{
composeWord += letters[1][j];
for (int k = 0; k < letters[2].Length; k++)
{
composeWord += letters[2][k];
for (int l = 0; l < letters[3].Length; l++)
{
composeWord += letters[3][l];
if (stateMachine.ValidWord(composeWord))
{
validWords.Add(composeWord);
}
composeWord = composeWord.Substring(0, composeWord.Length - 1);
}
composeWord = composeWord.Substring(0, composeWord.Length - 1);
}
composeWord = composeWord.Substring(0, composeWord.Length - 1);
}
composeWord = composeWord.Substring(0, composeWord.Length - 1);
}
return(validWords);
}