#include <sha256.h>
#include <SPI.h>
#include <Ethernet.h>

String message = "Close";
String timestamp = "1413175970";
String secret = "j344rfdas";
String temp;
String pakett;
String payload;

byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress server(192,168,2,101);  
IPAddress ip(192,168,1,138);



int client_id = 34;
uint8_t *hash;


void setup() {
  uint8_t* hash;
  uint32_t a;

  Serial.begin(9600);
  while (!Serial) {
}


}


  void loop() {
  Serial.println("Tere");
  Serial.println(message);
  
  delay(3000);
  create_packet(43, "Tere", "Close");
  create_hmac(pakett);
  compile_packet(pakett, temp);

  Serial.println(payload);
  delay(2000);
  eth_connect(payload);
  delay(15000);
  temp ="";
  
  create_packet(343, "Kolmas","Close");
  create_hmac(pakett);
  compile_packet(pakett,temp);
  eth_connect(payload);
  delay (2000);
  temp="";
  
  


  }
  
  
  
 void create_packet(int id, String event, String request)
 {
       Serial.println(id);
       Serial.println(event);
       Serial.println(request);     
       pakett = String(id) + "." + event + "." + timestamp + "." + request;
      // Serial.println(pakett);
 }
 
void create_hmac (String hmac_data)
{
  Sha256.initHmac((uint8_t*)"j344rfdas",9);
  Sha256.print(hmac_data);
  printHash(Sha256.resultHmac());

}

void printHash(uint8_t* hash) {
  
  int i;
  for (i=0; i<32; i++) {
   // Serial.print("0123456789abcdef"[hash[i]>>4]);
   // Serial.print("0123456789abcdef"[hash[i]&0xf]);    
    temp = temp + ("0123456789abcdef"[hash[i]>>4]);
    temp = temp + ("0123456789abcdef"[hash[i]&0xf]);  
  }
  Serial.println();
  Serial.println(temp); 
}

void compile_packet(String data_in, String hmac_in)
{
       payload = data_in + "." + hmac_in;
}

void eth_connect(String kirjutada)
{
    EthernetClient client;

  
  if (Ethernet.begin(mac) == 0) {
    Serial.println("Failed to configure Ethernet using DHCP");
    // no point in carrying on, so do nothing forevermore:
    // try to congifure using IP address instead of DHCP:
    Ethernet.begin(mac, ip);
  }
  
    if (client.connect(server, 8888)) {
    Serial.println("connected");
    // Make a HTTP request:
    
    int str_leng = kirjutada.length()+1;
    char ch_ary[str_leng];
    kirjutada.toCharArray(ch_ary, str_leng);
   // Serial.println(kirjutada);
   // Serial.println(ch_ary);
    client.write(ch_ary);
  } 
  else {
    // kf you didn't get a connection to the server:
    Serial.println("connection failed");
  }
}