using System;
using System.Net;

namespace GuessTheWord
{
	class MainClass
	{
		public static void Main (string[] args)
		{
			//Welcome Message
			//Ask how many guesses the player wants
			//amount of guesses == player input
			//Loading Message
			Console.WriteLine ("Hey, and welcome to this Hangman!");
			System.Threading.Thread.Sleep(2000);
			Console.Write ("How many guesses do you want? (10 recommended) ");
			int amountOfGuesses = Convert.ToInt16 (Console.ReadLine ());
			Console.WriteLine ("Please Wait...");

			//Start class Game with x amount of guesses
			Game guessingGame = new Game (amountOfGuesses);
			guessingGame.Initialization ();
		}
	}

	class Game
	{
		public Game (int guesses)
		{
			this.guesses = guesses;
		}

		public int guesses {get; set;}

		//Declare Strings
		public string wordToGuess;
		public string guessedWord;
		public string playerGuess;
		public string alreadyGuessedLetters;
		public string playAgainOrNot;

		//Declare Integers
		public int numberOfLetters;
		public int howManyGuessesDoYouWant;

		//Declare Booleans
		public bool itIsThere;
		public bool letterUsed;
		public bool playAgain;

		public void Initialization ()
		{
			//Get the word to guess from the GetWord function
			wordToGuess = GetWord ();

			//Put each letter of the word to uppercases
			//Get the lenght of the word
			wordToGuess = wordToGuess.ToUpper ();
			numberOfLetters = wordToGuess.Length;

			//What you have guessed so far == "_" * the number of letters you have
			//Start IsThereXLetter using the first letter of the word to guess
			//=> check the positions of this letter and replace what's already there with the letter
			//In this list of letters, add the first letter of the word to guess
			guessedWord = new string ('_', numberOfLetters);
			IsThereXLetter (wordToGuess [0]);
			alreadyGuessedLetters = alreadyGuessedLetters + wordToGuess [0];

			//Clear the console, remove all text
			//Write what the player has already guessed => the first letter + "_" for each other letter in the word
			Console.Clear ();
			Console.WriteLine ("Guess Me: " + guessedWord);

			//Start the Update function
			Update ();
		}

		public void Update ()
		{
			//As Long as this is true...
			while (true)
			{
				//If you don't have any more guesses...
				if (guesses == 0)
				{
					//Write the word you had to guess
					//Wait then clear the console
					Console.WriteLine ("You Lost!");
					Console.WriteLine ("The word was: " + wordToGuess);
					System.Threading.Thread.Sleep(4000);
					Console.Clear ();

					//Start the DoYouWantToPlayAgain function...
					DoYouWantToPlayAgain ();
					if (playAgain == true)
					{
						//If you do want to play again...
						//Write-Ask how many guesses the player wants
						//amount of guesses == player input
						//Loading Message
						Console.Write ("How many guesses do you want? (10 recommended) ");
						howManyGuessesDoYouWant = Convert.ToInt16 (Console.ReadLine ());
						Console.WriteLine ("Please Wait...");

						//Start class Game with x amount of guesses
						Game guessingGame = new Game (howManyGuessesDoYouWant);
						guessingGame.Initialization ();
					}
					else
					{
						//If you don't want to play again...
						//Exit the console
						Environment.Exit (1);
					}
				}

				//If what you have guessed so far still contains "_" => Letters are still missing...
				if (guessedWord.Contains ("_"))
				{
					//Write-Ask to guess a letter
					//Put the letter to uppercase
					Console.Write ("Guess a Letter: ");
					playerGuess = Console.ReadLine ().ToUpper ();

					//If the player input is only 1 letter long...
					if (playerGuess.Length == 1)
					{
						//Start IsThereXLetter using the letter the player inputed
						//=> check the positions of this letter and replace what's already there with the letter
						IsThereXLetter (playerGuess [0]);
						LetterAlreadyUsed ();

						//If the letter the player inputed is correct, and this letter has not already been used...
						if (itIsThere == true && letterUsed == false)
						{
							//Write that the player is correct
							//Add the letter the player inputed to the list of letters which have already been guessed
							//Wait then clear the console
							Console.WriteLine ("Correct!\n");
							alreadyGuessedLetters = alreadyGuessedLetters + playerGuess [0];
							System.Threading.Thread.Sleep (1500);
							Console.Clear ();
						}
						//Else if the letter has already been used...
						else if (letterUsed == true)
						{
							//Write that the player has already used that letter
							//Wait then clear the console
							Console.WriteLine ("You've already guessed that letter. Try Again!\n");
							System.Threading.Thread.Sleep (1500);
							Console.Clear ();
						}
						//If none of the above are true
						// => If the letter is not there and has not already been used
						else
						{
							//Write that the player is wrong, and that he has x amount of guesses left
							//Add the letter the player inputed to the list of letters which have already been guessed
							//Wait then clear the console
							//Remove 1 from the amount of guesses
							Console.WriteLine ("Wrong! You have " + (guesses - 1) + " guesses left.\n");
							alreadyGuessedLetters = alreadyGuessedLetters + playerGuess [0];
							System.Threading.Thread.Sleep(1500);
							Console.Clear ();
							guesses--;
						}
					}
					//If the player input does not contain only 1 letter...
					else
					{
						//Write that you only accept 1 letter
						//Wait then clear the console
						Console.WriteLine ("Only 1 letter please.\n");
						System.Threading.Thread.Sleep(1500);
						Console.Clear ();
					}

					//Write what the player has already guessed => the guessed letters + "_" for each other letter not found in the word
					Console.WriteLine ("Guess Me: " + guessedWord);
				}
				//If what you have guessed so far does not contain any "_" => You have found all the letters...
				else
				{
					//Write that the player has won
					//Wait the clear the console
					Console.WriteLine ("Congratulations, You've Won!" /*+ "\nThe word was: " + wordToGuess*/ + "\nYou had " + (guesses-1) + " guesses left");
					System.Threading.Thread.Sleep(4000);
					Console.Clear ();

					//Start the DoYouWantToPlayAgain function...
					DoYouWantToPlayAgain ();
					if (playAgain == true)
					{
						//If you do want to play again...
						//Write-Ask how many guesses the player wants
						//amount of guesses == player input
						//Loading Message
						Console.Write ("How many guesses do you want? (10 recommended) ");
						howManyGuessesDoYouWant = Convert.ToInt16 (Console.ReadLine ());
						Console.WriteLine ("Please Wait...");

						//Start class Game with x amount of guesses
						Game guessingGame = new Game (howManyGuessesDoYouWant);
						guessingGame.Initialization ();
					}
					else
					{
						//If you don't want to play again...
						//Exit the console
						Environment.Exit (1);
					}
				}

			}
		}

		//IsThereXLetter Function
		//Check if the the letter inputed (chatGettingGuessed) is in the word
		//If it is, change it with where it should be
		public void IsThereXLetter (char charGettingGuessed)
		{
			//Set the Positions to 0 by default
			int wordToGuessStartPos = 0;
			int wordToGuessCharPos = 0;

			//By default, the word does not contain the letter guessed, it is not there
			itIsThere = false;

			//As long as the Start position is lower than the number of letters contained in the word
			//AND the position of the guessed letter is bigger than -1
			//(if it's -1, it means that it's not in the word, it does not have a position)
			while ((wordToGuessStartPos < numberOfLetters) && (wordToGuessCharPos > -1))
			{
				wordToGuessCharPos = wordToGuess.IndexOf (charGettingGuessed, wordToGuessStartPos);
				if (wordToGuessCharPos == -1)
				{
					//If the guessed letter is not found
					//Break out of the while loop = set it to false
					break;
				}
				//Set the Start Position to be, its current positon + 1
				//Change the player input/letter with its position in the word, without touching the other letters
				wordToGuessStartPos = wordToGuessCharPos+1;
				guessedWord = guessedWord.Substring (0, wordToGuessCharPos) + charGettingGuessed + guessedWord.Substring (wordToGuessCharPos + 1);

				//Set that the word contain the letter guessed
				itIsThere = true;
			}
		}

		//LetterAlreadyUsed Function
		//Check if the letter assigned has already been used
		public void LetterAlreadyUsed ()
		{
			//If the the list of already guessed letters can't find the letter the player inputed
			//Then set that the letter has not been used
			//Else set that it has been used
			if (alreadyGuessedLetters.IndexOf (playerGuess [0]) == -1)
			{
				letterUsed = false;
			}
			else
			{
				letterUsed = true;
			}
		}

		//DoYouWantToPlayAgain Function
		//Ask if the player wants to play again, or not
		public void DoYouWantToPlayAgain ()
		{
			//As long as this is true...
			while (true)
			{
				//Write-Ask if the player wants to play again
				//Get the player input, put it in uppercase letters only
				Console.Write ("Do you want to play again? ");
				playAgainOrNot = Console.ReadLine ().ToUpper ();

				//If the player wants to play again...
				if (playAgainOrNot == "YES")
				{
					//Set that the player wants to play again
					//Wait then clear the console
					//Break out of the while loop = set it false
					Console.WriteLine ("Awesome!");
					playAgain = true;
					System.Threading.Thread.Sleep (2000);
					Console.Clear ();
					break;
				}
				//Else if the player does not want to play again...
				else if (playAgainOrNot == "NO")
				{
					//Set that the player does not want to play again
					//Wait then clear the console
					//Break out of the while loop = set it false
					Console.WriteLine ("BYE!");
					playAgain = false;
					System.Threading.Thread.Sleep (2000);
					Console.Clear ();
					break;
				}
				//If none of the above is true...
				//=> If the player input is not "yes" or "no"...
				else
				{
					//Write-Ask the player to try again
					//Wait then clear the console
					//Go back to the beginning of the while loop
					Console.WriteLine ("Please try again...");
					System.Threading.Thread.Sleep (2000);
					Console.Clear ();
				}
			}
		}

		//Get random word from a word list
		public static string GetWord ()
		{
			WebClient wc = new WebClient ();
			string wordList = wc.DownloadString ("https://raw.githubusercontent.com/Tom25/Hangman/master/wordlist.txt");
			string[] words = wordList.Split ('\n');

			Random randomWordGen = new Random ();
			return words [randomWordGen.Next (0, words.Length - 1)];
		}
	}
}