/**
 * HTTP Client. 
 * 
 * Starts a network client that connects to a server on port 80,
 * sends an HTTP 1.1 GET request, and prints the results. 
 */

import processing.net.*;

Client c;

String data;
String prevData;
PFont font;
int prevSec = 0;

void mpcRequest(){
  println("HTTP req.");
  c.clear();
  c.write("GET {MYSCRIPT} HTTP/1.1\n"); // Use the HTTP "GET" command to ask for a Web page
}


void setup() {
  frameRate(25);
  size(600, 200, P2D);
  background(50);
  fill(200);
  //load font
  font = loadFont("Verdana-16.vlw"); 
  textFont(font); 
  // Draw text more accurately and efficiently.
  textMode(SCREEN);
  textAlign(LEFT,TOP);

  c = new Client(this, "MY_HOST", 80); // Connect to server on port 80
  prevData = "init";
}

void draw() {
  try{
    if (c.available() > 0) { // If there's incoming data from the client...
      //wait a sec before trying to read it
      delay(100);
      data = c.readString(); // ...then grab it and print it
      println(data);
      if(data.indexOf("<begin>")!=-1&&data.indexOf("<end>")!=-1){
        data = data.substring(data.indexOf("<begin>")+7,data.indexOf("<end>"));
      } 
      else {
        data = "Invalid data received";
      }
      if(data.equals(prevData) != true){
        //only update stuff if there is anything new
        background(50);
        text(data, 10, 10);
        delay(10);
        prevData = data;
      }
    }
    if(second()-prevSec>9||(second()<prevSec&&second()>(prevSec-51))){
      //10 seconds elapsed: new request
      mpcRequest();

      prevSec = second();
    }
  } 
  catch(Exception e){
    println("EXCEPTION");
  }
}