#include <Wire.h>
#include <SPI.h>
#include <LiquidCrystal_I2C.h>
#include <RTClib.h>
#include <Servo.h>

#define PIR_PIN 13
#define LED_GREEN_PIN 12
#define LED_RED_PIN 14
#define SERVO_ON_PIN 27
#define SERVO_OFF_PIN 26

LiquidCrystal_I2C lcd(0x27, 16, 2);
RTC_DS3231 rtc;
Servo servoOn;
Servo servoOff;

void setup() {
    Serial.begin(115200);
    lcd.begin();
    lcd.backlight();
    pinMode(PIR_PIN, INPUT);
    pinMode(LED_GREEN_PIN, OUTPUT);
    pinMode(LED_RED_PIN, OUTPUT);
    
    // Attach servos to pins
    servoOn.attach(SERVO_ON_PIN);
    servoOff.attach(SERVO_OFF_PIN);

    // Initialize RTC
    if (!rtc.begin()) {
        lcd.print("RTC Error");
        while (1);
    }

    // Show initial welcome message
    lcd.print("WELCOME 08:30:00");
    lcd.setCursor(0, 1);
    lcd.print("OFFICE");
    delay(5000);
    lcd.clear();
}

void loop() {
    if (digitalRead(PIR_PIN) == HIGH) {
        openDoor();
    }
}

void openDoor() {
    lcd.clear();
    lcd.print("WELCOME 08:45:00");
    lcd.setCursor(0, 1);
    lcd.print("OPEN DOOR");
    digitalWrite(LED_GREEN_PIN, HIGH);
    servoOn.write(90);  // เปิดประตู
    servoOff.write(0);   // ปิด Servo ปิดประตู

    delay(5000);

    closeDoor();
}

void closeDoor() {
    lcd.clear();
    lcd.print("WELCOME 08:50:00");
    lcd.setCursor(0, 1);
    lcd.print("CLOSE DOOR");
    digitalWrite(LED_GREEN_PIN, LOW);
    digitalWrite(LED_RED_PIN, HIGH);
    servoOn.write(0);    // ปิด Servo เปิดประตู
    servoOff.write(90);   // เปิด Servo ปิดประตู

    delay(5000);

    digitalWrite(LED_RED_PIN, LOW);
    lcd.clear();
}