#define BLYNK_TEMPLATE_ID "TMPL6oANP5se5"
#define BLYNK_TEMPLATE_NAME "Hamster"
#define BLYNK_AUTH_TOKEN "Os8S_bWQluJnzva0eW_Rmtvv2KDJbvGA"

#include <WiFi.h>
#include <BlynkSimpleEsp32.h>
#include <ESP32Servo.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include "RTClib.h"

Servo servo;
RTC_DS3231 rtc;
LiquidCrystal_I2C lcd(0x27, 16, 2); // I2C address, columns, rows

const int servoPin = 25;
const int trigPin = 5;
const int echoPin = 34;
const int ledPin = 2;
const int buttonPin = 23;

char ssid[] = "Barudak RIAU";
char pass[] = "tanyadulu";

int jamInput = -1;
int menitInput = -1;

BlynkTimer timer;

// Fungsi pemberian pakan
void aktifkanServo() {
  Serial.println("🔧 Servo aktif: Memberi pakan");
  servo.write(90);
  delay(500);
  servo.write(0);
  delay(500);
}

// Blynk: Tombol V0 untuk aktifkan servo
BLYNK_WRITE(V0) {
  int value = param.asInt();
  if (value == 1) {
    aktifkanServo();
  }
}

// Blynk: Input waktu dari V1
BLYNK_WRITE(V1) {
  String waktu = param.asStr();
  int delimiter = waktu.indexOf(':');
  if (delimiter != -1) {
    jamInput = waktu.substring(0, delimiter).toInt();
    menitInput = waktu.substring(delimiter + 1).toInt();
    Serial.print("🕒 Input manual dari Blynk: ");
    Serial.print(jamInput); Serial.print(":"); Serial.println(menitInput);
  }
}

// Fungsi utama pengecekan
void cekPakanDanWaktu() {
  DateTime now = rtc.now();
  int hour = now.hour();
  int minute = now.minute();
  int second = now.second();

  // LCD: Tampilkan jam
  lcd.setCursor(0, 0);
  lcd.print("Jam: ");
  if (hour < 10) lcd.print("0");
  lcd.print(hour); lcd.print(":");
  if (minute < 10) lcd.print("0");
  lcd.print(minute); lcd.print(":");
  if (second < 10) lcd.print("0");
  lcd.print(second);

  // Serial: Tampilkan jam
  Serial.print("🕒 Waktu: ");
  Serial.print(hour); Serial.print(":");
  Serial.print(minute); Serial.print(":");
  Serial.println(second);

  // Kirim waktu ke Blynk (opsional)
  Blynk.virtualWrite(V1, String(hour) + ":" + String(minute));

  // Cek waktu pemberian pakan otomatis
  if (((hour == 8 || hour == 12 || hour == 18) && minute == 0 && second == 0) ||
      (hour == jamInput && minute == menitInput && second == 0)) {
    aktifkanServo();
    delay(1000);
  }

  // Sensor ultrasonik: baca jarak
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  long duration = pulseIn(echoPin, HIGH);
  float jarak = duration * 0.034 / 2;

  lcd.setCursor(0, 1);
  if (jarak <= 9.0) {
    digitalWrite(ledPin, LOW);
    lcd.print("Pakan Ada       ");
    Blynk.virtualWrite(V3, "Pakan Ada");
    Blynk.virtualWrite(V2, 255); // LED ON di app
    Serial.println("✅ Status: Pakan ADA");
  } else {
    digitalWrite(ledPin, HIGH);
    lcd.print("Pakan Habis     ");
    Blynk.virtualWrite(V3, "Pakan Habis");
    Blynk.virtualWrite(V2, 0);   // LED OFF di app
    Serial.println("⚠️  Status: Pakan HABIS");
  }

  // Cek tombol fisik
  if (digitalRead(buttonPin) == LOW) {
    Serial.println("🔘 Tombol ditekan: Servo aktif");
    aktifkanServo();
    delay(500);
  }
}

void setup() {
  Serial.begin(115200);

  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(ledPin, OUTPUT);
  pinMode(buttonPin, INPUT_PULLUP);
  servo.attach(servoPin);

  lcd.init();      // untuk inisialisasi
  lcd.backlight();

  // RTC
  if (!rtc.begin()) {
    Serial.println("⛔ RTC tidak ditemukan!");
    while (1);
  }

  // WiFi manual untuk kontrol error
  Serial.print("📶 Menghubungkan ke WiFi: ");
  Serial.println(ssid);
  WiFi.begin(ssid, pass);

  int retries = 0;
  while (WiFi.status() != WL_CONNECTED && retries < 20) {
    delay(500);
    Serial.print(".");
    retries++;
  }

  if (WiFi.status() == WL_CONNECTED) {
    Serial.println("\n✅ WiFi Terhubung");
    Serial.print("📡 IP ESP32: ");
    Serial.println(WiFi.localIP());
    Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);
  } else {
    Serial.println("\n⛔ Gagal tersambung ke WiFi. Blynk tidak dijalankan.");
  }

  timer.setInterval(1000L, cekPakanDanWaktu);
}

void loop() {
  if (WiFi.status() == WL_CONNECTED) {
    Blynk.run();
  }
  timer.run();
}