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

LiquidCrystal_I2C LCD = LiquidCrystal_I2C(0x27, 22, 21);
#define LED_PIN 12 // Define the LED pin
#define BUZZER_PIN 5 // Define the buzzer pin

#define NTP_SERVER "time2.nimt.or.th"
#define UTC_OFFSET 25200
#define UTC_OFFSET_DST 0

// Define musical notes
#define NOTE_C4 261
#define NOTE_D4 294
#define NOTE_E4 329
#define NOTE_F4 349
#define NOTE_G4 392
#define NOTE_A4 440
#define NOTE_B4 494
#define NOTE_C5 523

// Define note durations (in milliseconds)
#define DURATION_QUARTER 500
#define DURATION_HALF 1000
#define DURATION_WHOLE 2000

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

    LCD.setCursor(8, 0);
    LCD.println(String(timeinfo.tm_hour) + ":" + String(timeinfo.tm_min) + ":" + String(timeinfo.tm_sec));

    LCD.setCursor(0, 1);
    LCD.println(String(timeinfo.tm_mday) + "/" + String(timeinfo.tm_mon + 1) + "/" + String(timeinfo.tm_year + 1900) + " " + " " + "UTC");
}

void setup() {
    Serial.begin(115200);

    pinMode(LED_PIN, OUTPUT);
    pinMode(BUZZER_PIN, OUTPUT); // Set the buzzer pin as an output

    LCD.init();
    LCD.backlight();
    LCD.setCursor(0, 0);
    LCD.print("Connecting to ");
    LCD.setCursor(0, 1);
    LCD.print("WiFi ");

    WiFi.begin("Wokwi-GUEST", "", 6);
    while (WiFi.status() != WL_CONNECTED) {
        delay(250);
    }

    Serial.println("");
    Serial.println("WiFi connected");
    Serial.print("IP address: ");
    Serial.println(WiFi.localIP());

    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);
}

void buzzerAlarm() {
    // Turn on the buzzer for half a second
    digitalWrite(BUZZER_PIN, HIGH);
    delay(500);
    digitalWrite(BUZZER_PIN, LOW);
}

// Play a simple melody
void playMelody() {
    int melody[] = {NOTE_C4, NOTE_D4, NOTE_E4, NOTE_F4, NOTE_G4, NOTE_A4, NOTE_B4, NOTE_C5};
    int noteDurations[] = {DURATION_QUARTER, DURATION_QUARTER, DURATION_QUARTER, DURATION_QUARTER, DURATION_QUARTER, DURATION_QUARTER, DURATION_QUARTER, DURATION_WHOLE};

    for (int i = 0; i < 8; i++) {
        tone(BUZZER_PIN, melody[i], noteDurations[i]);
        delay(noteDurations[i] * 1.3); // Wait for the note to finish (slight overlap)
    }
}

void loop() {
    printLocalTime();

    struct tm timeinfo;
    if (getLocalTime(&timeinfo)) {
        int currentSecond = timeinfo.tm_sec;

        if (currentSecond == 10) {
            digitalWrite(LED_PIN, HIGH);
            playMelody(); // Play the melody
            delay(2000);
            digitalWrite(LED_PIN, LOW);
            buzzerAlarm();
        } 
        // else if (currentSecond == 12) {
        //     digitalWrite(LED_PIN, LOW);
        //     buzzerAlarm(); // Call the buzzer alarm function
        // }
    }

    delay(250);
}