#include <Wire.h>
#include "DHT.h"
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <EEPROM.h>

#define BUTTON_UP_PIN 7
#define BUTTON_DOWN_PIN 8
#define BUTTON_SET_PIN 6
#define BUTTON_NEXT_PIN 9
#define RELAY_PELTIER_PIN 10
#define RELAY_HUMIDIFIER_PIN 11

Adafruit_SSD1306 display = Adafruit_SSD1306(128, 64, &Wire, -1);
unsigned long delayTime;

#define DHTTYPE DHT22 // DHT 22 (AM2302), AM2321
uint8_t DHTPin = 2;
DHT dht(DHTPin, DHTTYPE);
float Temperature;
float Humidity;
float Temp_Fahrenheit;

int setTemperature = 0;
int setHumidity = 0;

bool settingMode = false;
bool settingTemperature = false;
bool settingHumidity = false;

void setup() {
  Serial.begin(115200);
  pinMode(DHTPin, INPUT);
  dht.begin();
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);  
  display.display();
  delay(1000);
  display.clearDisplay();
  display.display();
  display.setTextSize(1.75);
  display.setTextColor(WHITE);
  
  pinMode(BUTTON_UP_PIN, INPUT_PULLUP);
  pinMode(BUTTON_DOWN_PIN, INPUT_PULLUP);
  pinMode(BUTTON_SET_PIN, INPUT_PULLUP);
  pinMode(BUTTON_NEXT_PIN, INPUT_PULLUP);

  pinMode(RELAY_PELTIER_PIN, OUTPUT);
  pinMode(RELAY_HUMIDIFIER_PIN, OUTPUT);

  // Display initial text
  display.clearDisplay();
  display.setTextSize(1,3); // Adjust the text size as needed
  display.setCursor(15,8); // Adjust the position as needed
  display.println("CLIMATIC CHAMBER");
  display.setTextSize(1,2); // Adjust the text size as needed
  display.setCursor(25,40); // Adjust the position as needed
  display.println("PORTABLE 1.0");
  display.display();
  delay(3000); // Display the initial text for 2 seconds

  // Read set values from EEPROM
  setTemperature = 250; // 25.0 degrees
  setHumidity = 400; //

  // Masuk ke mode pengaturan setelah setup
  settingMode = true;
  settingTemperature = true;
  settingHumidity = false;

  // Check if EEPROM is empty
  if (EEPROM.read(0) == 0xFF && EEPROM.read(1) == 0xFF) {
    // Write default values to EEPROM
    EEPROM.put(0, 250); // 25.0 degrees
    EEPROM.put(sizeof(setTemperature), 400); // 40.0% humidity
  }
  // Read set values from EEPROM
  setTemperature = EEPROM.get(0, setTemperature);
  setHumidity = EEPROM.get(sizeof(setTemperature), setHumidity);
}

void loop() {
  if (settingMode) {
    if (settingTemperature) {
      if (digitalRead(BUTTON_UP_PIN) == LOW) {
        setTemperature = min(500, setTemperature + 10);
        delay(200); // debounce
      } else if (digitalRead(BUTTON_DOWN_PIN) == LOW) {
        setTemperature = max(0, setTemperature - 10);
        delay(200); // debounce
      } else if (digitalRead(BUTTON_NEXT_PIN) == LOW) {
        EEPROM.put(0, setTemperature);
        settingTemperature = false;
        settingHumidity = true;
        delay(500); // debounce
      }
      display.clearDisplay();
      display.setTextSize(1,3);
      display.setCursor(7,20);
      display.print("Set Temperature: ");
      display.print(setTemperature / 10);
      display.display();
    } else if (settingHumidity) {
      if (digitalRead(BUTTON_UP_PIN) == LOW) {
        setHumidity = min(1000, setHumidity + 10);
        delay(200); // debounce
      } else if (digitalRead(BUTTON_DOWN_PIN) == LOW) {
        setHumidity = max(0, setHumidity - 10);
        delay(200); // debounce
      } else if (digitalRead(BUTTON_NEXT_PIN) == LOW) {
        EEPROM.put(sizeof(setTemperature), setHumidity);
        settingHumidity = false;
        settingMode = false;
        delay(500); // debounce
      }
      display.clearDisplay();
      display.setTextSize(1,3);
      display.setCursor(15,20);
      display.print("Set Humidity: ");
      display.print(setHumidity / 10);
      display.display();
    }
  } else {
    // Read temperature and humidity from DHT sensor
    Humidity = dht.readHumidity();
    Temperature = dht.readTemperature();

    // Check if any reads failed and exit early (to try again).
    if (isnan(Humidity) || isnan(Temperature)) {
      Serial.println(F("Failed to read from DHT sensor!"));
      return;
    }

    // If set button is pressed, enter setting mode
  if (digitalRead(BUTTON_SET_PIN) == LOW) {
    settingMode = true;
    settingTemperature = true;
    settingHumidity = false;
    delay(100); // debounce
  }

   // Control peltier
if (Temperature * 10.0 < setTemperature) {
  digitalWrite(RELAY_PELTIER_PIN, HIGH); // Turn on peltier
} else if (Temperature * 10.0 > setTemperature) {
  digitalWrite(RELAY_PELTIER_PIN, LOW); // Turn off peltier
}

// Control humidifier
if (Humidity * 10.0 < setHumidity) {
  digitalWrite(RELAY_HUMIDIFIER_PIN, HIGH); // Turn on humidifier
} else if (Humidity * 10.0 > setHumidity) {
  digitalWrite(RELAY_HUMIDIFIER_PIN, LOW); // Turn off humidifier
}

 // Your existing code to read and display temperature and humidity
    Humidity = dht.readHumidity();
    Temperature = dht.readTemperature();
    Temp_Fahrenheit= dht.readTemperature(true);

    if (isnan(Humidity) || isnan(Temperature) || isnan(Temp_Fahrenheit)) {
      Serial.println(F("Failed to read from DHT sensor!"));
      return;
    }

    Serial.print(F("Humidity: "));
    Serial.print(Humidity);
    Serial.print(F("%  Temperature: "));
    Serial.print(Temperature);
    Serial.print(F("°C "));
    Serial.print(Temp_Fahrenheit);
    Serial.println(F("°F "));

    display.setCursor(0,0);
    display.clearDisplay();

    display.setTextSize(1);
    display.setCursor(0,0);
    display.print("Temperature: ");
    display.setTextSize(2);
    display.setCursor(0,10);
    display.print(Temperature);
    display.print(" ");
    display.setTextSize(1);
    display.cp437(true);
    display.write(167);
    display.setTextSize(2);
    display.print("C");
    
    // display humidity
    display.setTextSize(1);
    display.setCursor(0, 35);
    display.print("Humidity: ");
    display.setTextSize(2);
    display.setCursor(0, 45);
    display.print(Humidity);
    display.print(" %");
    
    display.display();
    delay(1000);
  }
}