// Simple demo for feeding some random data to Pachube.
// 2011-07-08 <jc@wippler.nl>
//
// License: GPLv2

// Handle returning code and reset ethernet module if needed
// 2013-10-22 hneiraf@gmail.com

#include <EtherCard.h>
#include <ArduinoJson.h>

// change these settings to match your own setup
#define FEED "000"
#define APIKEY "xxx"

// ethernet interface mac address, must be unique on the LAN
static byte mymac[] = { 0x74,0x69,0x69,0x2D,0x30,0x31 };

const char website[] PROGMEM = "ticket-project.herokuapp.com";

byte Ethernet::buffer[350];
uint32_t timer;
Stash stash;
byte session;

//timing variable
int res = 0;

char qrcode[] = "minhapirocaéenormeeeuodeiooarduino";

void setup () {
  Serial.begin(57600);
  Serial.println("\n[Xively example]");

  //Initialize Ethernet
  initialize_ethernet();
}


void loop () {

  //if correct answer is not received then re-initialize ethernet module
  if (res > 220){
    initialize_ethernet();
  }

  res = res + 1;

  ether.packetLoop(ether.packetReceive());

  //200 res = 10 seconds (50ms each res)
  if (res == 200) {

    // generate two fake values as payload - by using a separate stash,
    // we can determine the size of the generated message ahead of time
    byte sd = stash.create();
    stash.print("qr_code:");
    stash.println(qrcode);
    stash.save();

    //Display data to be sent
    Serial.println(qrcode);


    // generate the header with payload - note that the stash size is used,
    // and that a "stash descriptor" is passed in as argument using "$H"
    Stash::prepare(PSTR("POST $F/api/tickets HTTP/1.1" "\r\n"
      "Host: $F" "\r\n"
      "qr_code: $F"
      "Content-Length: $D" "\r\n"
      "\r\n"
      "$H"),
    website, website, qrcode, stash.size(), sd);

    // send the packet - this also releases all stash buffers once done
    session = ether.tcpSend();
  }

   const char* reply = ether.tcpReply(session);

   if (reply != 0) {
     res = 0;
     Serial.println(reply);
   }
   delay(50);
}



void initialize_ethernet(void){
  for(;;){ // keep trying until you succeed
    //Reinitialize ethernet module
    pinMode(5, OUTPUT);
    Serial.println("Reseting Ethernet...");
    digitalWrite(5, LOW);
    delay(1000);
    digitalWrite(5, HIGH);
    delay(500);

    // Change 'SS' to your Slave Select pin, if you arn't using the default pin
    if (ether.begin(sizeof Ethernet::buffer, mymac, SS) == 0){
      Serial.println( "Failed to access Ethernet controller");
      continue;
    }

    if (!ether.dhcpSetup()){
      Serial.println("DHCP failed");
      continue;
    }

    ether.printIp("IP:  ", ether.myip);
    ether.printIp("GW:  ", ether.gwip);
    ether.printIp("DNS: ", ether.dnsip);

    if (!ether.dnsLookup(website))
      Serial.println("DNS failed");

    ether.printIp("SRV: ", ether.hisip);

    //reset init value
    res = 0;
    break;
  }
}