#include <WiFi.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <TridentTD_LineNotify.h>

// Replace with your network credentials
const char* ssid = "Wokwi-GUEST";
const char* password = "";

// Line Notify token
#define LINE_TOKEN "ij3BTrbSEN804X54cvkb4h2FdneatPFXkENlWBrXlRp"

// LCD setup
LiquidCrystal_I2C lcd(0x27, 16, 2);

// Ultrasonic sensor pins
const int trigPin = 5;
const int echoPin = 18;

// Button pin
const int buttonPin = 4;

// Variables to store button state
bool buttonPressed = false;
unsigned long lastDebounceTime = 0;
unsigned long debounceDelay = 50;

void setup() {
  Serial.begin(115200);
  Serial.println("123");
  // Initialize LCD
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("Connecting to");
  lcd.setCursor(0, 1);
  lcd.print("WiFi...");

  // Connect to Wi-Fi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    lcd.setCursor(0, 1);
    lcd.print(".");
    Serial.print(".");
  }
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("WiFi Connected");
  delay(1000);
  lcd.clear();

  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(buttonPin, INPUT_PULLUP);

  // Initialize Line Notify
  LINE.setToken(LINE_TOKEN);
}

void loop() {
  long duration;
  int distance;

  // Clear the trigPin
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);

  // Set the trigPin on HIGH state for 10 microseconds
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  // Read the echoPin
  duration = pulseIn(echoPin, HIGH);

  // Calculate the distance
  distance = duration * 0.034 / 2;

  // Display the distance on LCD
  lcd.setCursor(0, 0);
  lcd.print("Distance: ");
  lcd.print(distance);
  lcd.print(" cm   ");

  // Check button state
  int buttonState = digitalRead(buttonPin);
  if (buttonState == LOW) {
    if (!buttonPressed) {
      buttonPressed = true;
      lastDebounceTime = millis();
    } else if (millis() - lastDebounceTime > debounceDelay) {
      sendLineNotification(distance);
      buttonPressed = false; // Reset button state to prevent multiple notifications
    }
  } else {
    buttonPressed = false;
  }

  delay(100);
}

void sendLineNotification(int distance) {
  String message = "Distance: " + String(distance) + " cm!";
  LINE.notify(message);
  Serial.println("Notification sent: " + message);
}