#include <MD_Parola.h>
#include <MD_MAX72xx.h>
#include <SPI.h>
#include <DHT.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

#define HARDWARE_TYPE MD_MAX72XX::PAROLA_HW
#define MAX_DEVICES 11
#define CLK_PIN 13
#define DATA_PIN 11
#define CS_PIN 10

MD_Parola P = MD_Parola(HARDWARE_TYPE, CS_PIN, MAX_DEVICES);

// DHT22
#define DHTPIN 2
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

// LCD
LiquidCrystal_I2C lcd(0x27, 16, 2);

// Relay dan indikator
const int relayPin = 7;
const int ledMain = 8;

// LED running
const int led1 = 3;
const int led2 = 4;
const int led3 = 5;
const int led4 = 6;

// Counter suhu
int tempCounter = 0;          // 4-bit counter, range 0–15
const int MAX_COUNTER = 15;
const int MIN_COUNTER = 0;

// Pesan LED matrix
#define BUF_SIZE 100
char curMessage[BUF_SIZE] = { "" };
char newMessage[BUF_SIZE] = { "ROMADONA SYARIF HIDAYAH - 241091900109 Monitoring Suhu Otomatis - Sistem Komputer" };
bool newMessageAvailable = true;

// Fungsi baca serial untuk Parola
void readSerial(void) {
  static char *cp = newMessage;
  while (Serial.available()) {
    *cp = (char)Serial.read();
    if ((*cp == '\n') || (cp - newMessage >= BUF_SIZE - 2)) {
      *cp = '\0';
      cp = newMessage;
      newMessageAvailable = true;
    } else {
      cp++;
    }
  }
}

void setup() {
  Serial.begin(9600);
  dht.begin();
  lcd.begin(16, 2);
  lcd.backlight();

  // Inisialisasi pin
  pinMode(relayPin, OUTPUT);
  pinMode(ledMain, OUTPUT);
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(led4, OUTPUT);

  // LED Matrix
  P.begin();
  P.displayText(curMessage, PA_LEFT, 25, 100, PA_SCROLL_LEFT, PA_SCROLL_LEFT);

  Serial.println("Sistem Monitoring Suhu + LED Running + Counter");
}

void loop() {
  // Animasi LED matrix
  if (P.displayAnimate()) {
    if (newMessageAvailable) {
      strcpy(curMessage, newMessage);
      newMessageAvailable = false;
    }
    P.displayReset();
  }

  readSerial();

  // Baca sensor suhu
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();

  if (isnan(humidity) || isnan(temperature)) {
    Serial.println("Gagal membaca sensor DHT22!");
    return;
  }

  // Update counter suhu berdasarkan nilai
  updateTemperatureCounter(temperature);

  // Tampilkan ke LCD
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Suhu: ");
  lcd.print(temperature);
  lcd.print("C");
  lcd.setCursor(0, 1);
  lcd.print("Cnt:");
  lcd.print(tempCounter);
  lcd.print(" H:");
  lcd.print(humidity);
  lcd.print("%");

  // Kendali relay dan LED utama
  if (temperature > 30) {
    digitalWrite(relayPin, HIGH);
    digitalWrite(ledMain, HIGH);
  } else {
    digitalWrite(relayPin, LOW);
    digitalWrite(ledMain, LOW);
  }

  // Jalankan LED efek berurutan
  runLedSequence();
}

// Fungsi LED running
void runLedSequence() {
  digitalWrite(led1, HIGH); delay(20); digitalWrite(led1, LOW);
  digitalWrite(led2, HIGH); delay(20); digitalWrite(led2, LOW);
  digitalWrite(led3, HIGH); delay(20); digitalWrite(led3, LOW);
  digitalWrite(led4, HIGH); delay(20); digitalWrite(led4, LOW);
}

// Fungsi counter suhu 4-bit
void updateTemperatureCounter(float temp) {
  if (temp > 20) {
    if (tempCounter < MAX_COUNTER) {
      tempCounter++;
    }
  } else {
    if (tempCounter > MIN_COUNTER) {
      tempCounter--;
    }
  }
}