#include <WiFi.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include "DHTesp.h"

const int DHT_PIN = 15;
const int LED_PIN = 2;
const int PIR_PIN = 4;

LiquidCrystal_I2C LCD = LiquidCrystal_I2C(0x27, 16, 2);
DHTesp dhtSensor;

void spinner() {
  static int8_t counter = 0;
  const char* glyphs = "\xa1\xa5\xdb";
  LCD.setCursor(15, 1);
  LCD.print(glyphs[counter++]);
  if (counter == strlen(glyphs)) {
    counter = 0;
  }
}

void printTemperatureAndHumidity() {
  TempAndHumidity data = dhtSensor.getTempAndHumidity();
  if (isnan(data.temperature) || isnan(data.humidity)) {
    LCD.setCursor(0, 1);
    LCD.println("Error reading DHT");
    return;
  }

  LCD.setCursor(0, 0);
  LCD.print("Temp: ");
  LCD.print(data.temperature, 1);
  LCD.print("C");
  LCD.setCursor(0, 1);
  LCD.print("Humidity: ");
  LCD.print(data.humidity, 1);
  LCD.print("%    ");

  if (data.temperature > 30 || data.humidity > 70 || digitalRead(PIR_PIN) == HIGH) {
    digitalWrite(LED_PIN, HIGH);
  } else {
    digitalWrite(LED_PIN, LOW);
  }
}

void setup() {
  pinMode(LED_PIN, OUTPUT);
  pinMode(PIR_PIN, INPUT);

  Serial.begin(115200);

  LCD.init();
  LCD.backlight();
  LCD.setCursor(0, 0);
  LCD.print("Connecting to ");
  LCD.setCursor(0, 1);
  LCD.print("WiFi ");

  WiFi.begin("Wokwi-GUEST", "", 6);
  while (WiFi.status() != WL_CONNECTED) {
    delay(250);
    spinner();
  }

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());

  LCD.clear();
  LCD.setCursor(0, 0);
  LCD.println("Online");
  LCD.setCursor(0, 1);
  LCD.println("Updating data...");

  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);

  configTime(0, 0, "pool.ntp.org");
}

void loop() {
  printTemperatureAndHumidity();
  delay(1000);
}