var geist = require('geist');

// Describe your assistant
var hal = new geist.Mind('HAL 9000', {
  // Language is taken from the document if not specified here
  language: 'en-US',
  // Keep listening all the time if you like
  continuous: true,
  // Define generic concepts for recognition and/or answer text generation
  // You can either use template strings or functions to determine a match
  concepts: {
    TOD: ["morning | afternoon | evening | night", function() {
      // Current time of day
      var hours = new Date().getHours();
      if(hours < 12)       return 'morning';
      else if(hours <= 16) return 'afternoon';
      else if(hours <= 22) return 'evening';
      else                 return 'night';
    }],
    JOKE: [undefined, function() {
      // Random joke
      return _.pick(jokes);
    }]
  },
  // Define your action handlers
  actions: {
    MESSAGE: function(person, text) {
      // Send message...
    }
  },
  // Build the actual conversation
  conversation: {
    // Use alternatives to make recognition flexible and output diverse
    "Thank('s | you)" : "You're welcome! | No problem!",
    // Reference general concepts in your conversation and influence TTS using emotions
    "Open #ARTICLE * [pod bay] door[s]" : "I'm sorry, #HUMAN. %SAD(I'm afraid I can't do that)",
    // Create your own concepts and reference them
    "(Tell [me] | [Do] you know) a joke" : "How about this one: #JOKE",
    // Allow greetings before other text and greet back before continuing
    "(Hi | Hello | Good #TOD) [#NAME] [...]" : "(Hello | Good #TOD), #HUMAN! ...",
    // Use $variables to extract information
    "[(Send | write | new) [a]] message to {$person: *}" : { "What message would you like to send to $person?" : {
      // Drill down into conversations to retrieve additional information
      "{$message: *}" : { "Shall is send \"$message \" to $person?" : {
        // Call action handler
        "#YES" : "!MESSAGE($person, $message) It's out!",
        // Ask for the message again
        "#NO" : "Sorry, <-",
        // Back to top level
        "#CANCEL" : "Ok, not sending it. <--"
      }}
    }},

    // Make sure at least one phrase catches everything
    "*" : "Excuse me!? | Can you please repeat that, #HUMAN?"
  }
});

// Start listening to the users voice
// The user will be asked for access to her microphone
hal.listen(function(interimText) {
  // Visualize speech recognition process..
}, function(text) {
  // Show final recognized text...
}, function(answer) {
  // (Answer is being spoken using TTS)
  // Display answer as well if you like...
});

// Stop speaking and listening immediately
hal.stop();