#include <TimeLib.h>
#include <TimeAlarms.h>
#include <Wire.h>
#include <DS1307RTC.h>  // a basic DS1307 library that returns time as a time_t
#include <ESP32Servo.h>
#include <WiFi.h>
#include <WiFiUdp.h>

#define WIFI_SSID           "Wokwi-GUEST"
#define WIFI_PASSWORD       ""
Servo servoPakan; 
IPAddress timeServer(162, 159, 200, 1);// id.pool.ntp.org
const int timeZone = 7;     // Jakarta, Bangkok, Hanoi Time

WiFiUDP Udp;
unsigned int localPort = 8888; 
time_t prevDisplay = 0;
WiFiClient espClient;
int status = WL_IDLE_STATUS;

void InitWiFi()
{
  Serial.println("Connecting to AP ......");
  // attempt to connect to WiFi network

  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
  while (WiFi.status() != WL_CONNECTED) {

    delay(500);
    Serial.print(".");
  }
  Serial.println("Connected to AP");
}

void reconnect() {
  // Loop until we're reconnected
  status = WiFi.status();
  if ( status != WL_CONNECTED) {
    WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
    while (WiFi.status() != WL_CONNECTED) {
      delay(500);
      Serial.print("...");
    }
    Serial.println("Connected to AP");
  }
}

void setup() {
  servoPakan.attach(33); 
  InitWiFi();
  Serial.begin(115200);
  while (!Serial) ; 
  // get and set the time from the RTC
  Udp.begin(localPort);
  setSyncProvider(getNtpTime);
  //setSyncProvider(RTC.get);   
  if (timeStatus() != timeSet) 
    Serial.println("Unable to sync with the RTC");
  else
    Serial.println("RTC has set the system time");     

  // to test your project, you can set the time manually 
  //setTime(21,22,0,10,22,22); // set time to Saturday 8:29:00am Jan 1 2011

  // create the scheduled tasks, to trigger functions at specific times
  Alarm.alarmRepeat(23,40,10,feedingPagi);  
  Alarm.alarmRepeat(23,40,20,feedingSiang); 
  Alarm.alarmRepeat(23,40,30,feedingMalam); 
}

void loop() {
  if (WiFi.status() != WL_CONNECTED) {
    reconnect();
  }
  digitalClockDisplay();
  Alarm.delay(1000); 
}

void feedingPagi() {
  Serial.println("Eksekusi Feeding ke-1");
  servoPakan.write(30);
  delay(3000);
  servoPakan.write(90);
}
void feedingSiang() {
  Serial.println("Eksekusi Feeding ke-2");
  servoPakan.write(30);
  delay(3000);
  servoPakan.write(90);
}
void feedingMalam() {
  Serial.println("Eksekusi Feeding ke-3");
  servoPakan.write(30);
  delay(3000);
  servoPakan.write(90);
}

void digitalClockDisplay() {
  Serial.print(hour());
  printDigits(minute());
  printDigits(second());
  Serial.println();
}
void printDigits(int digits) {
  Serial.print(":");
  if (digits < 10)
    Serial.print('0');
  Serial.print(digits);
}

const int NTP_PACKET_SIZE = 48; // NTP time is in the first 48 bytes of message
byte packetBuffer[NTP_PACKET_SIZE]; //buffer to hold incoming & outgoing packets

time_t getNtpTime()
{
  while (Udp.parsePacket() > 0) ; // discard any previously received packets
  Serial.println("Transmit NTP Request");
  sendNTPpacket(timeServer);
  uint32_t beginWait = millis();
  while (millis() - beginWait < 1500) {
    int size = Udp.parsePacket();
    if (size >= NTP_PACKET_SIZE) {
      Serial.println("Receive NTP Response");
      Udp.read(packetBuffer, NTP_PACKET_SIZE);  // read packet into the buffer
      unsigned long secsSince1900;
      // convert four bytes starting at location 40 to a long integer
      secsSince1900 =  (unsigned long)packetBuffer[40] << 24;
      secsSince1900 |= (unsigned long)packetBuffer[41] << 16;
      secsSince1900 |= (unsigned long)packetBuffer[42] << 8;
      secsSince1900 |= (unsigned long)packetBuffer[43];
      return secsSince1900 - 2208988800UL + timeZone * SECS_PER_HOUR;
    }
  }
  Serial.println("No NTP Response :-(");
  return 0; // return 0 if unable to get the time
}

// send an NTP request to the time server at the given address
void sendNTPpacket(IPAddress &address)
{
  // set all bytes in the buffer to 0
  memset(packetBuffer, 0, NTP_PACKET_SIZE);
  // Initialize values needed to form NTP request
  // (see URL above for details on the packets)
  packetBuffer[0] = 0b11100011;   // LI, Version, Mode
  packetBuffer[1] = 0;     // Stratum, or type of clock
  packetBuffer[2] = 6;     // Polling Interval
  packetBuffer[3] = 0xEC;  // Peer Clock Precision
  // 8 bytes of zero for Root Delay & Root Dispersion
  packetBuffer[12]  = 49;
  packetBuffer[13]  = 0x4E;
  packetBuffer[14]  = 49;
  packetBuffer[15]  = 52;
  // all NTP fields have been given values, now
  // you can send a packet requesting a timestamp:                 
  Udp.beginPacket(address, 123); //NTP requests are to port 123
  Udp.write(packetBuffer, NTP_PACKET_SIZE);
  Udp.endPacket();
}