#include <SPI.h>
#include <SD.h>
#include <Wire.h>
#include <RTClib.h>
#include <DHT.h>

#define DHTPIN 2
#define DHTTYPE DHT11

#define RELAY_PIN 8
#define BUTTON_PIN 7
#define SD_CS 10

#define SOIL1 A0
#define SOIL2 A1

DHT dht(DHTPIN, DHTTYPE);
RTC_DS3231 rtc;
File dataFile;

bool pumpState = false;
unsigned long lastLog = 0;
const unsigned long logInterval = 1000; // 1 menit

void setup() {
  Serial.begin(9600);

  pinMode(RELAY_PIN, OUTPUT);
  pinMode(BUTTON_PIN, INPUT_PULLUP);

  digitalWrite(RELAY_PIN, LOW);

  dht.begin();

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

  if (!SD.begin(SD_CS)) {
    Serial.println("MicroSD gagal!");
    while (1);
  }

  if (!SD.exists("data.csv")) {
    dataFile = SD.open("data.csv", FILE_WRITE);
    dataFile.println("Tanggal,Waktu,Soil1,Soil2,Suhu,HumUdara,Pompa");
    dataFile.close();
  }

  Serial.println("Sistem Smart Garden Siap ✅");
}

void loop() {
  unsigned long nowMillis = millis();

  if (nowMillis - lastLog >= logInterval) {
    lastLog = nowMillis;
    logData();
  }

  if (digitalRead(BUTTON_PIN) == LOW) {
    delay(300);
    scanData();
  }
}

void logData() {
  int soil1 = analogRead(SOIL1);
  int soil2 = analogRead(SOIL2);

  float suhu = dht.readTemperature();
  float hum = dht.readHumidity();

  DateTime now = rtc.now();

  pumpState = (soil1 < 400 || soil2 < 400);
  digitalWrite(RELAY_PIN, pumpState ? HIGH : LOW);

  dataFile = SD.open("data.csv", FILE_WRITE);
  if (dataFile) {
    dataFile.print(now.day()); dataFile.print("-");
    dataFile.print(now.month()); dataFile.print("-");
    dataFile.print(now.year()); dataFile.print(",");

    dataFile.print(now.hour()); dataFile.print(":");
    dataFile.print(now.minute()); dataFile.print(",");

    dataFile.print(soil1); dataFile.print(",");
    dataFile.print(soil2); dataFile.print(",");
    dataFile.print(suhu); dataFile.print(",");
    dataFile.print(hum); dataFile.print(",");
    dataFile.println(pumpState ? "ON" : "OFF");
    dataFile.close();
  }

  // ===== OUTPUT KE TERMINAL =====
  Serial.println("Data tersimpan:");
  Serial.print("Tanggal : ");
  Serial.print(now.day()); Serial.print("-");
  Serial.print(now.month()); Serial.print("-");
  Serial.println(now.year());

  Serial.print("Waktu   : ");
  Serial.print(now.hour()); Serial.print(":");
  Serial.println(now.minute());

  Serial.print("Soil1   : "); Serial.println(soil1);
  Serial.print("Soil2   : "); Serial.println(soil2);
  Serial.print("Suhu    : "); Serial.print(suhu); Serial.println(" C");
  Serial.print("Hum     : "); Serial.print(hum); Serial.println(" %");
  Serial.print("Pompa   : "); Serial.println(pumpState ? "ON" : "OFF");
  Serial.println("-------------------------");
}


void scanData() {
  Serial.println("=== SCAN DATA MICROSD ===");

  dataFile = SD.open("data.csv");
  if (dataFile) {
    while (dataFile.available()) {
      Serial.write(dataFile.read());
    }
    dataFile.close();
  } else {
    Serial.println("Gagal membaca data!");
  }

  Serial.println("\n=== END DATA ===");
}