#include <WiFi.h>
#include <WiFiClient.h>
#include <string.h>


#define NTP_SERVER     "pool.ntp.org"
#define UTC_OFFSET     0
#define UTC_OFFSET_DST 0


#include <stdio.h>
#include <LiquidCrystal_I2C.h>
#include <Wire.h>

#define BLYNK_TEMPLATE_ID "TMPL6NvzUgtLw"
#define BLYNK_TEMPLATE_NAME "LED CONTROL"
#define BLYNK_AUTH_TOKEN "dJU-mLH_8pN5djKnWpNcyG-sRx4W0ipC"


#define I2C_SDA 21 // Chân SDA
#define I2C_SCL 22 // Chân SCL
LiquidCrystal_I2C lcd = LiquidCrystal_I2C(0x27, 16, 2);


#define BLYNK_PRINT Serial

#include <BlynkSimpleEsp32.h>

#include <ESP32Servo.h>


#include <DHT.h>
#define DHTPIN 14 //chan cam bien
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);



char ssid[] = "Wokwi-GUEST" ;
char pass[] = "" ;


#define servoPin 19
#define blue 2
Servo myServo;



BLYNK_WRITE(V0) 
{
  int buttonState = param.asInt();
  
  if (buttonState ==1 )
  {
    digitalWrite(blue, HIGH);
    lcd.clear();
    lcd.print("LED ON");
    delay(500);
    displayWelcomeScreen(); 
  }
  if (buttonState == 0 )
  {
    digitalWrite(blue,LOW);
    lcd.clear();
    lcd.print("LED OFF");
    delay(500);
    displayWelcomeScreen(); 
  }
}


BLYNK_WRITE(V1) // nut 2 dkhien dong co
{
  int buttonState = param.asInt();

    if (buttonState == 1) {
      myServo.write(45); // Xoay động cơ 30 độ
      lcd.clear();
      lcd.print("Dang cho an");
      delay(500);
      displayWelcomeScreen();     
    } else if (buttonState == 0) { // Sửa lỗi so sánh
      myServo.write(90); // Dừng servo
      lcd.clear();
      lcd.print("dung cho an");
      delay(500);
      displayWelcomeScreen();     
    }
  
}

WidgetLED ledConnect(V2);
unsigned long timesBlinkLed=millis();


BLYNK_CONNECTED() {
  // Request Blynk server to re-send latest values for all pins
  Blynk.syncAll();
  //Blynk.syncVirtual(V0, V2);
}

WidgetLED StatusEat(V3);
BLYNK_WRITE(V3) // nut 2 dkhien dong co
{
  int buttonState = param.asInt();

    if (buttonState == 1) {
      myServo.write(45); // Xoay động cơ 45 độ
      delay(2000);
      myServo.write(90);   
      StatusEat.off();
    }
}

BLYNK_WRITE(V4) // nút B 
{
  int buttonState = param.asInt();
    if (buttonState == 1) {

      
    }
}
void setup() {

  Serial.begin(115200);
  dht.begin();
  Wire.begin(I2C_SDA, I2C_SCL);
  lcd.init();
  lcd.backlight();  

 
  lcd.setCursor(0, 0);
  lcd.print("Connecting to ");
  lcd.setCursor(0, 1);
  lcd.print("WiFi ");

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


  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.println("Online");
  lcd.setCursor(0, 1);
  lcd.println("Updating time...");

  configTime(UTC_OFFSET, UTC_OFFSET_DST, NTP_SERVER);


  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);
  
  lcd.clear();
  displayWelcomeScreen();



  pinMode(blue,OUTPUT);

  digitalWrite(blue,LOW);


  myServo.attach(servoPin);
  myServo.write(90);


}

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 printLocalTime() {
  struct tm timeinfo;
  if (!getLocalTime(&timeinfo)) {
    lcd.setCursor(0, 1);
    lcd.println("Connection Err");
    return;
  }

  // Thêm 7 giờ để hiển thị đúng múi giờ của Việt Nam (UTC+7)
  timeinfo.tm_hour = (timeinfo.tm_hour + 7) % 24;

  lcd.setCursor(8, 0);
  lcd.printf("%02d:%02d:%02d", timeinfo.tm_hour, timeinfo.tm_min, timeinfo.tm_sec);

  lcd.setCursor(6, 1);
  lcd.printf("%02d/%02d/%04d", timeinfo.tm_mday, timeinfo.tm_mon + 1, timeinfo.tm_year + 1900);
}


void displayWelcomeScreen() {
  lcd.clear();
  lcd.backlight(); // Bật đèn nền LCD
  printLocalTime();
}




void loop() {

  lcd.display(); // Hiển thị nội dung trên LCD
  printLocalTime();
  delay(300);
  Blynk.run();


  float h = dht.readHumidity();
  Blynk.virtualWrite(V4, h);


  if(millis()-timesBlinkLed>1000){
    if(ledConnect.getValue()){
      ledConnect.off();
    }else{
      ledConnect.on();
    }
  }


}