#include <LiquidCrystal_I2C.h>
#include <WiFi.h>
#include <HTTPClient.h>
#include <DHT.h>
#include <NTPClient.h>
#include <WiFiUdp.h>

#define DHTPIN 4
#define DHTTYPE DHT22

LiquidCrystal_I2C lcd(0x27, 16, 2);
DHT dht(DHTPIN, DHTTYPE);

const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* lineToken = "ij3BTrbSEN804X54cvkb4h2FdneatPFXkENlWBrXlRp";
unsigned long previousMillis = 0; 
const long interval = 300000;

WiFiUDP ntpUDP;
NTPClient timeClient(ntpUDP, "pool.ntp.org", 7 * 3600, 60000);

void setup() {
  lcd.init();
  lcd.backlight();
  Serial.begin(115200);
  Serial.println("Hello, Sornnaret009");
  dht.begin();

  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("Connected to WiFi");
  timeClient.begin();
  
  lcd.setCursor(0, 0);
  lcd.print("Hello, Sornnaret009");
  delay(5000); 
  lcd.clear();
}

void loop() {
  unsigned long currentMillis = millis();
  unsigned long elapsedMillis = currentMillis - previousMillis;
  timeClient.update();
  
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  String formattedTime = timeClient.getFormattedTime();

  lcd.setCursor(0, 0);
  lcd.print(formattedTime);

  lcd.setCursor(0, 1);
  lcd.print("T: ");
  lcd.print(temperature);
  lcd.print("C H: ");
  lcd.print(humidity);
  lcd.print("%");

  if (elapsedMillis >= interval) {
    previousMillis = currentMillis;
    sendLineNotification("Temperature: " + String(temperature));
    
    lcd.setCursor(15, 0); 
    lcd.write(byte(1));
  } else {
    
    if (elapsedMillis % interval < 1000) {
      lcd.setCursor(15, 0);
      lcd.print(" ");
    }
  }

  delay(1000);
}

void sendLineNotification(String message) {
  if (WiFi.status() == WL_CONNECTED) {
    HTTPClient http;
    http.begin("https://notify-api.line.me/api/notify");
    http.addHeader("Content-Type", "application/x-www-form-urlencoded");
    http.addHeader("Authorization", "Bearer " + String(lineToken));

     if (message.length() == 0) {
      message = "Test message from ESP32";
    }

    String payload = "message=" + message;
    Serial.print("Payload: ");
    Serial.println(payload);
    int httpResponseCode = http.POST(payload);

    if (httpResponseCode > 0) {
      String response = http.getString();
      Serial.println("Response: " + response);
    } else {
      Serial.print("Error on sending POST: ");
      Serial.println(httpResponseCode);
      Serial.println(http.errorToString(httpResponseCode).c_str());
    }
    http.end();
  } else {
    Serial.println("WiFi Disconnected");
  }
}