import processing.serial.*;

Serial myPort;
PFont font;
int currentSecond;
int sensorValue = 0;
int secondCounter = 0;
int fileCounter = 0;
String[] minuteBuffer = new String[60];
String lastReading = "0";
String lastFile = "n/a";

void setup() {
  size(200,120);
  framerate(10);
  myPort = new Serial(this, Serial.list()[0], 9600);
  font = loadFont("ArialMT-24.vlw");
  textFont(font,24);
  currentSecond = second();
}

void draw() {
  background(0);
  if(second() != currentSecond) {
    currentSecond = second();
    getValue();
  }
  if(secondCounter >= 60) {
    String fileName = "begin";
    secondCounter = 0;
    if(fileCounter < 10) {
      fileName = new String("m000000" + fileCounter + ".txt");      
    } else if(fileCounter <100) {
      fileName = new String("m00000" + fileCounter + ".txt");      
    } else if(fileCounter <1000) {
      fileName = new String("m0000" + fileCounter + ".txt");      
    } else if(fileCounter <10000) {
      fileName = new String("m000" + fileCounter + ".txt");
    } else if(fileCounter <100000) {
      fileName = new String("m00" + fileCounter + ".txt");
    }
    saveStrings(fileName, minuteBuffer);
    fileCounter += 1;
    lastFile = new String(fileName);
  }
  text(lastReading,20,50);
  text(lastFile,20,80);
}

void getValue() {
  myPort.write(63);
  int inBytes[] = new int[myPort.available()];
  for(int i=0; i<inBytes.length; i++) {
    inBytes[i] = myPort.read() - 48;
  }
  if(inBytes.length == 1) {
    sensorValue = inBytes[0];
  } else if(inBytes.length == 2) {
    sensorValue = (10 * inBytes[0]) + inBytes[1];
  } else if(inBytes.length == 3) {
    sensorValue = (100 * inBytes[0]) + (10 * inBytes[1]) + inBytes[2];
  }
  minuteBuffer[secondCounter] = hour() + ":" + minute() + ":" + second() + "-" + sensorValue;
  lastReading = new String(minuteBuffer[secondCounter]);
  secondCounter += 1;
}