/*
   Created by ArduinoGetStarted.com

   This example code is in the public domain

   Tutorial page: https://arduinogetstarted.com/library/arduino-melody-example
   Library References: https://arduinogetstarted.com/tutorials/arduino-buzzer-library

   This example uses a piezo buzzer:
   + plays a melody once on background each time a button is pressed
   + stops playing a melody when another button is pressed
   + without using delay() function, this is a non-blocking example
*/

#include "TinyIRReceiver.hpp"
#include <LiquidCrystal_I2C.h>
#include <ezBuzzer.h> // ezBuzzer library
#include "RTClib.h"



const int BTN_PIN = 8;
//const int STOP_BUTTON_PIN  = 7;
const int BUZZER_PIN = 4;
const unsigned long ONE_SEC = 1000;
const unsigned long DEBOUNCE_TIME = 20;

bool isPlaying = false;
int lastStartButtonState = HIGH; // the previous state from the input pin
int lastStopButtonState  = HIGH; // the previous state from the input pin
unsigned long prevTime = 0;

ezBuzzer buzzer(BUZZER_PIN, BUZZER_TYPE_PASSIVE, HIGH); // create ezBuzzer object: pin, type, activeLevel (PASSIVE for melody)
LiquidCrystal_I2C lcd(0x27, 16, 2);
RTC_DS1307 rtc;

// notes in the melody:
int melody[] = {
  NOTE_E5, NOTE_E5, NOTE_E5,
  NOTE_E5, NOTE_E5, NOTE_E5,
  NOTE_E5, NOTE_G5, NOTE_C5, NOTE_D5,
  NOTE_E5,
  NOTE_F5, NOTE_F5, NOTE_F5, NOTE_F5,
  NOTE_F5, NOTE_E5, NOTE_E5, NOTE_E5, NOTE_E5,
  NOTE_E5, NOTE_D5, NOTE_D5, NOTE_E5,
  NOTE_D5, NOTE_G5
};

// note durations: 4 = quarter note, 8 = eighth note, etc, also called tempo:
int noteDurations[] = {
  8, 8, 4,
  8, 8, 4,
  8, 8, 8, 8,
  2,
  8, 8, 8, 8,
  8, 8, 8, 16, 16,
  8, 8, 8, 8,
  4, 4
};

void checkButton()  {
  static uint32_t lastTime = 0;
  static bool lastState = HIGH;
  bool currentState = digitalRead(BTN_PIN);
  uint32_t now = millis();

  if (currentState != lastState && now - lastTime >= DEBOUNCE_TIME) {
    if (!currentState) {
      Serial.println("Button pressed!");
      isPlaying = !isPlaying;
    } else {
      Serial.println("Button released!");
    }
    lastTime = now;
    lastState = currentState;
  }
}

void playTune() {
  if (buzzer.getState() == BUZZER_IDLE) {
    int length = sizeof(noteDurations) / sizeof(int);
    buzzer.playMelody(melody, noteDurations, length); // playing
  }
}

void showTime() {
  char buffer[16];

  DateTime now = rtc.now();

  lcd.setCursor(4, 0);
  snprintf(buffer, 16, "%2d:%02d:%02d", now.hour(), now.minute(), now.second());
  lcd.print(buffer);
/*
  Serial.print("Current time: ");
  Serial.print(now.year(), DEC);
  Serial.print('/');
  Serial.print(now.month(), DEC);
  Serial.print('/');
  Serial.print(now.day(), DEC);
  Serial.print(" ");
  //Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
  // Serial.print(") ");
  Serial.print(now.hour(), DEC);
  Serial.print(':');
  Serial.print(now.minute(), DEC);
  Serial.print(':');
  Serial.print(now.second(), DEC);
  Serial.println();


  Serial.println();
  */
}

void setup() {
  Serial.begin(9600);
  if (! rtc.begin()) {
    Serial.println("Couldn't find RTC");
    Serial.flush();
    for (;;);
  }
  initPCIInterruptForTinyIRReceiver(); // Enables the interrupt generation on change of IR input signal
lcd.init();
lcd.backlight();
//lcd.print("Hello");
  pinMode(BTN_PIN, INPUT_PULLUP);
  //pinMode(STOP_BUTTON_PIN,  INPUT_PULLUP);
}

void loop() {
  buzzer.loop(); // MUST call the buzzer.loop() function in loop()

  checkButton();

  if (isPlaying)  {
    playTune();
  } else  {
    if (buzzer.getState() != BUZZER_IDLE) {
      buzzer.stop() ; // stop
    }
  }

  if (millis() - prevTime >= ONE_SEC) {
    showTime();
    prevTime = millis();
  }

  if (TinyIRReceiverDecode()) {
    printTinyIRReceiverResultMinimal(&Serial);
  }



  /*
    int startButtonState = digitalRead(START_BUTTON_PIN);
    int stopButtonState  = digitalRead(STOP_BUTTON_PIN);

    if (lastStartButtonState == HIGH && startButtonState == LOW) {
      Serial.println("The START button is pressed");
      if (buzzer.getState() == BUZZER_IDLE) {
        int length = sizeof(noteDurations) / sizeof(int);
        buzzer.playMelody(melody, noteDurations, length); // playing
      }
      delay(20);
      lastStartButtonState = startButtonState;

    }

    if (lastStopButtonState == HIGH && stopButtonState == LOW) {
      Serial.println("The STOP button is pressed");
      if (buzzer.getState() != BUZZER_IDLE) {
        buzzer.stop() ; // stop
      }
      lastStopButtonState  = stopButtonState;
      delay(20);
    }
  */

}