var twitter = require("ntwitter"),
      fs = require('fs'),
      words = fs.readFileSync('words.txt').toString().split("\n");
  
  var client = new twitter({
    consumer_key: "YOUR_CONSUMER_KEY",
    consumer_secret: "YOUR_CONSUMER_SECRET",
    access_token_key: "YOUR_ACCESS_TOKEN_KEY",
    access_token_secret: "YOUR_ACCESS_TOKEN_SECRET"
  });
      
  var accountName = "hangmanword";
  
  function randomWord() {
    var word;
    do {
      word = words[Math.floor(Math.random()*words.length)];
    } while(!word.match(/^\w+$$/) || word.length < 5) 
    return word;
  }
  
  var Hangman = function(accountName,client) {
    var self = this;
  
    this.gameNumber = 0;
  
    var hangman =  "__O-[-<";
  
    this.newWord = function() {
      this.word = randomWord();
      this.currentWord = this.word.split("");
      this.currentGuesses = [];
      this.guesses = [];
      this.lettersRemaining = this.currentWord.length;
      this.guessesRemaining = 5;
      this.gameNumber++;
      this.sendGameUpdate();
      console.log("\n");
      console.log("New Word:" + this.word);
    };
  
    this.sendTweet = function(status) {
      client.updateStatus(status,function(err,data) {
        if(!err) {
          console.log("Sent Tweet:" + status);
        } else {
          console.log("Error Sending Tweet:" + status + 
                      "\nError:" + err);
        }
      });
    };
  
    this.sendGameUpdate = function() {
      var status = "Game " + this.gameNumber + ": " + 
                   hangman.substring(0,hangman.length - this.guessesRemaining ) + 
                   " Word:";
  
      for(var i=0;i<this.currentWord.length;i++) {
        if(this.currentGuesses[i]) {
          status += " " + this.currentWord[i];
        } else {
          status += " _"
        }
      }
      this.sendTweet(status);
    };
  
    this.sendExistingGuess = function(tweeter,guess) {
      this.sendTweet("@" + tweeter + ' Sorry someone has already guessed "' + 
                     guess + '"');
    };
  
    this.sendIncorrect = function(tweeter,guess) {
      var extra = this.guessesRemaining <= 0 ? 
                  " - Game Over (Word was " + this.word + ")" : ""
      this.sendTweet("@" + tweeter + ' sorry there are no ' + 
                     guess + "'s in game " + this.gameNumber + extra);
    };
  
    this.sendCorrect = function(tweeter,guess,correct) {
      var extra = this.lettersRemaining == 0 ? " - Congratulations you win!" : ""
      this.sendTweet("@" + tweeter + ' yes, ' + guess + " appears " + 
                     correct + (correct > 1 ? " times" : " time") + 
                     " in game " + this.gameNumber + extra);
    };
  
    this.handleGuess = function(tweet) {
      if(!tweet.text) return;
  
      var guess = tweet.text.replace(/[^a-z]/gi,""),
          tweeter = tweet.user.screen_name,
          correct = 0;
  
      try { 
        if(tweet.text.indexOf("@" + accountName) === 0) {
          guess = guess[guess.length-1].toLowerCase();
  
          if(this.guesses.indexOf(guess) != -1) {
            return this.sendExistingGuess(tweeter,guess);
          } 
          this.guesses.push(guess);
  
          for(var letter=0;letter < this.currentWord.length;letter++) {
            if(this.currentWord[letter].toLowerCase() == guess) {
              correct++;
              this.lettersRemaining--;
              this.currentGuesses[letter] = true;
            }
          }
  
          if(correct > 0) {
            this.sendCorrect(tweeter,guess,correct);
            if(this.lettersRemaining == 0) {
              this.newWord();
            } else {
              this.sendGameUpdate();
            }
          } else {
            this.guessesRemaining--;
            this.sendIncorrect(tweeter,guess);
  
            if(this.guessesRemaining > 0) {
              this.sendGameUpdate();
            } else {
              setTimeout(function() { self.newWord(); }, 2000);
            }
          }
        }
      } catch(e) {
        console.log("Error:" + e.toString());
  
      }
    };
  
    this.connect = function() {
      client.stream('user', { track:accountName ,replies:'all' }, function(stream) {
        stream.on('data', function (data) {
          setTimeout(function() {
            self.handleGuess(data);
          },1);
        });
        stream.on('end', function (response) {
          self.connect();
        });
        stream.on('error', function (response) {
          console.log("Error");
        });
        stream.on('destroy', function (response) {
          self.connect();
        });
      });
    };
  
    this.newWord();
    this.connect();
  };
  
  var hangman = new Hangman(accountName,client);