#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <RTClib.h>
#include <SD.h>
#include <DHT.h>

#define DHTPIN1 2
#define DHTPIN2 3
#define DHTTYPE DHT22

DHT dht1(DHTPIN1, DHTTYPE);
DHT dht2(DHTPIN2, DHTTYPE);

RTC_DS3231 rtc;
LiquidCrystal_I2C lcd(0x27, 20, 4);

const int soilSensor1 = A0;
const int soilSensor2 = A1;
const int soilSensor3 = A2;
const int relay1 = 4;
const int relay2 = 5;
const int relay3 = 6;
const int chipSelect = 53;
const int buttonPin = 7; // Pin connected to the button

int moistureThreshold = 50; // Initial soil moisture threshold percentage

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

  dht1.begin();
  dht2.begin();

  if (!rtc.begin()) {
    Serial.println("Couldn't find RTC");
    while (1);
  }

  if (!SD.begin(chipSelect)) {
    Serial.println("Card failed, or not present");
    while (1);
  }

  lcd.begin(20, 4);
  lcd.backlight();

  pinMode(relay1, OUTPUT);
  pinMode(relay2, OUTPUT);
  pinMode(relay3, OUTPUT);
  pinMode(buttonPin, INPUT_PULLUP); // Configure the button pin as input with internal pull-up resistor

  digitalWrite(relay1, HIGH);
  digitalWrite(relay2, HIGH);
  digitalWrite(relay3, HIGH);
}

void loop() {
  float h1 = dht1.readHumidity();
  float t1 = dht1.readTemperature();
  float h2 = dht2.readHumidity();
  float t2 = dht2.readTemperature();

  int rawMoisture1 = analogRead(soilSensor1);
  int rawMoisture2 = analogRead(soilSensor2);
  int rawMoisture3 = analogRead(soilSensor3);

  int moisture1 = map(rawMoisture1, 0, 1023, 0, 100);
  int moisture2 = map(rawMoisture2, 0, 1023, 0, 100);
  int moisture3 = map(rawMoisture3, 0, 1023, 0, 100);

  // Check if the button is pressed
  if (digitalRead(buttonPin) == LOW) {
    delay(50); // Debounce delay
    if (digitalRead(buttonPin) == LOW) { // Confirm the button is still pressed
      moistureThreshold += 10; // Increment the threshold by 10%
      if (moistureThreshold > 100) {
        moistureThreshold = 0; // Reset to 0% if it exceeds 100%
      }
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Threshold:");
      lcd.print(moistureThreshold);
      lcd.print("%");
      delay(1000); // Display the new threshold for 1 second
    }
  }

  DateTime now = rtc.now();
  String dataString = String(now.timestamp(DateTime::TIMESTAMP_FULL)) + "," + 
                      String(t1) + "," + String(h1) + "," +
                      String(t2) + "," + String(h2) + "," +
                      String(moisture1) + "," + 
                      String(moisture2) + "," + 
                      String(moisture3);

  File dataFile = SD.open("datalog.txt", FILE_WRITE);
  if (dataFile) {
    dataFile.println(dataString);
    dataFile.close();
  } else {
    Serial.println("error opening datalog.txt");
  }

  lcd.setCursor(1, 0);
  lcd.print("CHAMROEUN AE29 RUA ");

  lcd.setCursor(0, 1);
  lcd.print("T1:");
  lcd.print(t1);
  lcd.setCursor(11, 1);
  lcd.print("T2:");
  lcd.print(t2);

  lcd.setCursor(0, 2);
  lcd.print("H1:");
  lcd.print(h1);
  lcd.setCursor(11, 2);
  lcd.print("%H2:");
  lcd.print(h2);
  lcd.print("%");

 lcd.setCursor(0, 3);
  lcd.print("M1:");
  lcd.print(moisture1);
  lcd.print("% M2:");
  lcd.print(moisture2);
  lcd.print("% M3:");
  lcd.print(moisture3);
  lcd.print("%");

  if (moisture1 < moistureThreshold) {
    digitalWrite(relay1, LOW);
  } else {
    digitalWrite(relay1, HIGH);
  }

  if (moisture2 < moistureThreshold) {
    digitalWrite(relay2, LOW);
  } else {
    digitalWrite(relay2, HIGH);
  }

  if (moisture3 < moistureThreshold) {
    digitalWrite(relay3, LOW);
  } else {
    digitalWrite(relay3, HIGH);
  }

  delay(9600);
}