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

// ตั้งค่าคอนสตานต์
#define DHTPIN 4          // เปลี่ยนเป็นพินที่เชื่อมต่อ DHT22
#define DHTTYPE DHT22
#define LINE_NOTIFY_TOKEN "YOUR_LINE_NOTIFY_TOKEN" // แทนที่ด้วย token ของคุณ

// กำหนดค่าของเซ็นเซอร์
DHT dht(DHTPIN, DHTTYPE);

// ตั้งค่า WiFi
const char* ssid = "YOUR_SSID";
const char* password = "YOUR_PASSWORD";

// ตั้งค่า LCD
LiquidCrystal_I2C lcd(0x27, 16, 2); // ใช้ address 0x27 และขนาด 16x2

// ตั้งค่าเวลา
WiFiUDP ntpUDP;
NTPClient timeClient(ntpUDP);

unsigned long previousMillisTemp = 0;
unsigned long previousMillisHumidity = 0;
unsigned long previousMillisLCD = 0;
const long intervalTemp = 30 * 60 * 1000; // 30 นาที
const long intervalHumidity = 30 * 60 * 1000; // 30 นาที
const long intervalLCD = 10 * 1000; // 10 วินาที

void setup() {
  Serial.begin(115200);
  dht.begin();
  
  lcd.begin();
  lcd.backlight();
  
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("Connected to WiFi");
  
  timeClient.begin();
  timeClient.setTimeOffset(25200); // +7 ชั่วโมง (GMT+7)
}

void loop() {
  unsigned long currentMillis = millis();

  // ตรวจสอบเวลาสำหรับการส่งการแจ้งเตือน
  if (currentMillis - previousMillisTemp >= intervalTemp) {
    previousMillisTemp = currentMillis;
    float temperature = dht.readTemperature();
    if (temperature > 26) {
      sendLineNotify("Temp is high: " + String(temperature) + "C");
    }
  }

  if (currentMillis - previousMillisHumidity >= intervalHumidity) {
    previousMillisHumidity = currentMillis;
    float humidity = dht.readHumidity();
    if (humidity < 40) {
      sendLineNotify("Humidity is low: " + String(humidity) + "%");
    } else {
      sendLineNotify("Temp & Humidity is normal");
    }
  }

  // อัพเดทจอ LCD
  if (currentMillis - previousMillisLCD >= intervalLCD) {
    previousMillisLCD = currentMillis;
    timeClient.update();
    
    float temperature = dht.readTemperature();
    float humidity = dht.readHumidity();
    
    Serial.print("Temperature: ");
    Serial.print(temperature);
    Serial.print(" C ");
    Serial.print("Humidity: ");
    Serial.print(humidity);
    Serial.println(" %");

    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Temp: ");
    lcd.print(temperature);
    lcd.print(" C");
    lcd.setCursor(0, 1);
    lcd.print("Humidity: ");
    lcd.print(humidity);
    lcd.print(" %");
    delay(2000);
    
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("FM Temp");
    lcd.setCursor(0, 1);
    lcd.print(timeClient.getFormattedDate());
  }
}

void sendLineNotify(String message) {
  if (WiFi.status() == WL_CONNECTED) {
    HTTPClient http;
    http.begin("https://notify-api.line.me/api/notify");
    http.addHeader("Authorization", "Bearer " + LINE_NOTIFY_TOKEN);
    http.addHeader("Content-Type", "application/x-www-form-urlencoded");
    String postData = "message=" + message;
    int httpCode = http.POST(postData);
    if (httpCode > 0) {
      String payload = http.getString();
      Serial.println(payload);
    } else {
      Serial.println("Error on HTTP request");
    }
    http.end();
  } else {
    Serial.println("Error: WiFi not connected");
  }
}