#include <MD_Parola.h>
#include <MD_MAX72XX.h>
#include <SPI.h>
#include <Wire.h>
#include "RTClib.h"
#include <DHT.h>

#define HARDWARE_TYPE MD_MAX72XX::FC16_HW

#define DATA_PIN 2
#define CLK_PIN 1

#define CS_RTC 29
#define CS_DHT 28

#define DHTPIN 27
#define DHTTYPE DHT11

#define MAX_DEVICES 4

#define LDR_PIN A0
#define LED1_PIN 9
#define LED2_PIN 10

int threshold = 500;

MD_Parola displayRTC(HARDWARE_TYPE, DATA_PIN, CLK_PIN, CS_RTC, MAX_DEVICES);
MD_Parola displayDHT(HARDWARE_TYPE, DATA_PIN, CLK_PIN, CS_DHT, MAX_DEVICES);

RTC_DS3231 rtc;
DHT dht(DHTPIN, DHTTYPE);

unsigned long lastDHTRead = 0;
unsigned long lastDisplayChange = 0;

float temperature = 0;
float humidity = 0;

bool showTemperature = true;

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

  Wire.begin();
  dht.begin();

  pinMode(LED1_PIN, OUTPUT);
  pinMode(LED2_PIN, OUTPUT);

  if (!rtc.begin()) {
    Serial.println("RTC not found!");
    while (1);
  }

  if (rtc.lostPower()) {
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  }

  displayRTC.begin();
  displayDHT.begin();

  displayRTC.setIntensity(1);
  displayDHT.setIntensity(1);

  displayRTC.displayClear();
  displayDHT.displayClear();
}

void loop() {

  DateTime now = rtc.now();

  char timeBuf[10];
  sprintf(timeBuf, "%02d:%02d", now.hour(), now.minute());

  displayRTC.displayText(timeBuf, PA_CENTER, 0, 0, PA_PRINT, PA_NO_EFFECT);
  displayRTC.displayAnimate();


  if (millis() - lastDHTRead >= 2000) {

    lastDHTRead = millis();

    float t = dht.readTemperature();
    float h = dht.readHumidity();

    if (!isnan(t) && !isnan(h)) {
      temperature = t;
      humidity = h;
    }
  }


  if (millis() - lastDisplayChange >= 15000) {

    lastDisplayChange = millis();
    showTemperature = !showTemperature;
  }


  char dhtBuf[20];

  if (showTemperature) {
    sprintf(dhtBuf, "T %.0fC", temperature);
  }
  else {
    sprintf(dhtBuf, "H %d%%", (int)humidity);
  }

  displayDHT.displayText(dhtBuf, PA_CENTER, 0, 0, PA_PRINT, PA_NO_EFFECT);
  displayDHT.displayAnimate();


  int lightValue = analogRead(LDR_PIN);

  Serial.println(lightValue);

  if (lightValue > threshold) {
    digitalWrite(LED1_PIN, HIGH);
    digitalWrite(LED2_PIN, HIGH);
  }
  else {
    digitalWrite(LED1_PIN, LOW);
    digitalWrite(LED2_PIN, LOW);
  }
}