// Robert Twomey rtwomey@u.washington.edu

import processing.serial.*;

// voice recognition variables
Sphinx listener;
String s = "";

// receipt printer variables
Serial myPort;
static int LF = 10;
static boolean doprint = true;

// behavior parameters
static int silenttime = 180000;
int lastevent = 0;
boolean waiting;

void setup() {
  size(400, 400);
  background(0);

  // setup printer if necessary
  if(doprint)
    setupPrinter();

  // setup speech recognition
  listener = new Sphinx(this,"bochner.slm.config.xml");

  // set-up intra-utterance timing
  lastevent = 0;
  waiting = true;
}

void setupPrinter() {
  // serial init
  println(Serial.list());
  // I know that the first port in the serial list on my mac
  // is always my  Keyspan adapter, so I open Serial.list()[0].
  // Open whatever port is the one you're using.
  myPort = new Serial(this, Serial.list()[0], 4800);

  //init receipt printer
  //  myPort.write(ESC);
  //  myPort.write("@");

  // fast feed
  myPort.write(ESC);
  myPort.write('d');
  myPort.write(8);

  // line feed
  //  myPort.write(LF);

  // cut paper
  //  myPort.write(ESC);
  //  myPort.write('i');

  delay(1000);
}


void dispose() {
  listener.dispose();
}

void draw() { 

  // check how long it has been silent
  if(!waiting && ((millis()-lastevent) > silenttime)) {
    // advance and cut, set state to wait for new input
    advanceAndCut();
    waiting = true;
  }
}

void advanceAndCut() {
  // fast feed paper
  myPort.write(ESC);
  myPort.write('d');
  myPort.write(8); // feed this many lines

  // cut paper
  myPort.write(ESC);
  myPort.write('i');
}

void doQuit() {

//  // advance paper and cut
//  if(doprint)
//    advanceAndCut();

  // close and dispose
  exit();
}

void SphinxEvent(Sphinx _l) {
  int now = millis();
  int delaytime = 0;
  waiting = false;

  s = _l.readString(); // returns the recognized string

    // echo to screen 
  //  System.out.print("["+now+"] sphinx heard: "+s);
  System.out.print("["+now+"] "+s);

  // intra-utterance timing
  System.out.println("  ("+(now-lastevent)+" since last utterance)");
  lastevent=now;

  // send to printer if necessary
  if(doprint) {
    //    _l.stopListening();
    myPort.write(s);
    myPort.write(LF);
    /*    delaytime = 100*ceil(s.length()/42.0); // Epson TM-267II prints 42 columns per line, 2.1 LPS
     System.out.print("pausing "+str(delaytime)+" ms at "+millis());
     //delay(delaytime);
     System.out.println("resuming listening at "+millis());
     _l.startListening();*/
  }

  // check for stop command
  if((s.lastIndexOf("quit") >= 0) || (s.lastIndexOf("exit") >= 0))
    doQuit();

  if(s.lastIndexOf("cut")>=0 || s.lastIndexOf("stop")==0)
    advanceAndCut();
}

void keyPressed() {
  if(key==' ') {
    listener.toggleListening();
  }
}