import processing.serial.*; 
  
XMLElement xml; 
XMLElement city; 
XMLElement temperature; 
XMLElement cond; 
  
int interval = 10; 
int lastTime; 
  
String feed = "http://www.google.com/ig/api?weather=seoul&;hl=en"; 
String location; 
String temp; 
String condition; 
  
// google api condition value list 
String []condition_list =  { 
  "Clear", "Cloudy", "Fog", "Haze", "Light Rain", "Mostly Cloudy", "Overcast", "Partly Cloudy", "Rain",  
  "Rain Showers", "showers", "Thunderstorm", "chance of Showers", "Chance of Snow", "Chance of Storm",  
  "Mostly Sunny", "Partly Sunny", "Scattered Showers", "Sunny"
}; 
int condition_index; 
  
PFont font_title, font_normal, font_desc; 
Serial port;  // serial that communication with arduino  
  
  
  
  
// setup section 
void setup() { 
  size(800, 400); 
  frameRate(10); 
  
  font_title = loadFont("18thCentury-40.vlw"); 
  font_normal = loadFont("18thCentury-20.vlw"); 
  font_desc = loadFont("18thCentury-14.vlw"); 
  
  fill(255); 
  textFont(font_title, 20); 
  
  String arduinoPort = Serial.list()[0]; 
  port = new Serial(this, arduinoPort, 9600);  // connect to Arduino 
  
  lastTime = 0; 
  fetchData(); 
} 
  
void draw(){ 
  background(0); 
  int n = (interval  - ((millis() - lastTime)/1000)); 
  
  textFont(font_title, 40); 
  text("Live WeatherCast", 10, 40); 
  textFont(font_normal, 20); 
  text("Reading feed:", 10, 70); 
  textFont(font_desc, 14); 
  text(feed, 10, 85); 
  
  textFont(font_normal, 20); 
  text(location, 10, 120); 
  textFont(font_desc, 14); 
  text("temperature : " + temp + "c", 10, 140); 
  text("condition : " + condition, 10, 160);  
 
  text("Next update in " + n + " seconds.", 10, 200); 
  
  if(n<=0){ 
    fetchData(); 
    lastTime = millis(); 
  } 
} 
  
  
void fetchData(){ 
  String chunk; 
  xml = new XMLElement(this, feed);   
  
  city = xml.getChild("weather/forecast_information/city"); 
  location = city.getStringAttribute("data"); 
  println("location: " + location); 
 
  temperature = xml.getChild("weather/current_conditions/temp_c"); 
  temp = temperature.getStringAttribute("data"); 
  println("temperature: " + temp); 
  
  cond = xml.getChild("weather/current_conditions/condition"); 
  condition = cond.getStringAttribute("data"); 
  println("condition: " + condition); 
  
  //  println("list.length: "+ condition_list.length + "\n");   
 
  // search and get index of condition_list that match with data from google api XML data 
  for(int i=0; i< 
condition_list.length ; i++){     
    if(condition_list[i].equals(condition)){ 
      condition_index = i; 
      //    println("xml_condition: " + condition); 
      println(""); 
     println("found match in list index_"+i+" : " + condition_list[i] + " !!"); 
     port.write(condition_index); 
      println("send index: ["+ i + "] to arduino!"); 
    } 
  } 
}