var prompt = require('prompt-sync')();
var ConversationV1 = require('watson-developer-cloud/conversation/v1');
var conversation = new ConversationV1({
  username: 'USERNAME',
  password: 'PASSWORD',
  path: { workspace_id: 'WORKSPACE_ID' },
  version_date: '2016-07-11'
});

/**
 * Process the conversation response and decides if it needs to
 * continue the conversation or not based on the context flags.
 */
function processMessage(err, response) {
  if (err) {
    console.error(err); // something went wrong
    return;
  }

  var endConversation = false;

  // If an intent was detected, log it out to the console.
  if (response.intents.length > 0) {
    console.log('Detected intent: #' + response.intents[0].intent);
  }

  // Check for action flags.
  if (response.output.action === 'display_time') {
    // User asked what time it is, so we output the local system time.
    console.log('The current time is ' + new Date().toLocaleTimeString() + '.');
  } else if (response.output.action === 'end_conversation') {
    // User said goodbye, so we're done.
    console.log(response.output.text[0]);
    endConversation = true;
  } else {
    // Display the output from dialog, if any.
    console.log(response.output.text[0]);
  }

  if (!endConversation) {
    // Prompt for the new user message
    var newMessageFromUser = prompt('Type a message: ');
    conversation.message({
      input: { text: newMessageFromUser },
      context : response.context, // keep the conversation context
    }, processMessage)
  }
}

// Start conversation. This preloads the action flags in the context with
// false, and then triggers the conversation_start node.
var initialMessage = {
  context: {
    display_time: false,
    end_conversation: false
  }
};

// send initial message
conversation.message(initialMessage, processMessage);