#include <SPI.h>
#include <Ethernet.h>

//Delay between Dynamic IP updates, in minutes...
int UpDelay = 1;

//DNS Server to update
char DNS_Server[] = "dynamicdns.park-your-domain.com";

//MAC address
byte mac[] = { 0x90, 0xA1, 0xDB, 0x02, 0x05, 0x17 };
//Public IP server
char IPServer[] = "checkip.dyndns.com";
//checkip.dyndns.org


//Ignore these
String IPA, OldIPA;

EthernetClient client;

void setup() {
  Serial.begin(19200);
  Serial.println("Started...");

  //Turn LED

  Configure:
  Serial.print("(please wait)\nEthernet ");
  if (Ethernet.begin(mac) == 0) {
   Serial.println("Configuration failed.  Retrying in 2 minutes.");
   delay(60*1000*2);
   goto Configure;
  }
  Serial.println("Configured...");
  //Turn LED 2 on
  delay(5000);
}

void loop() {
  Serial.println("Running Update");
  Serial.println("Attempting Connect.");
  if(client.connect(IPServer, 80)){
    Serial.println("Connected to IP Server\n\n");

    client.println("GET HTTP/1.0");
    client.println();

    //Wait for response
    delay(2000);

    String BufLine;
    while(client.available() > 0){
      BufLine += client.read();
      if(BufLine.endsWith("\n")){
        if(BufLine.indexOf("Current IP Address: ") > -1){
          IPA = BufLine.substring(76,BufLine.length()-16);
          Serial.println(IPA);
          client.stop();
          if(IPA != "0"){
            delay(2000);
            //UPDATE DNS HERE
            Serial.println("Time to.");
            EthernetClient client;
            delay(2000);
            if(client.connect(DNS_Server, 80)){
              Serial.println("Updating DNS");
              long time = (millis()/1000);
              String sendstring = "GET /update?host=www&domain=cluelessperson.com%20&password=2e7958b8d7304f978b7cc01ef18925c3&Timer=" + String(time) + " HTTP/1.0";
              client.println(sendstring);
              client.println("");

              for(int x = 0;x < 10;x++){

              while(client.available() > 0){
                Serial.print(client.read());
              }
              delay(1000);
              }
              client.stop();
            }else{
             Serial.println("Failed to connect to dns server");
            }


          }
          OldIPA = IPA;
        }
        BufLine = "";

      }
    }
    Serial.print("\n\n");
  }else{
    Serial.println("Connection failed...");
    //Turn Update Light Off
  }
  for(int i = (30*UpDelay);i > -1 ;i--){
   delay(1000);
   Serial.println(i);
  }
}