#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <AccelStepper.h>

const byte Fullstep = 4;
const byte Halfstep = 8;
const short fullRevolution = 2038;
const float SteppDegree = 11.32; // Half/Full 11.32 / 5.66

// Pins IN1-IN3-IN2-IN4
AccelStepper stepper1(Halfstep, 12, 10, 11, 9);

#define OLED_RESET    -1
Adafruit_SSD1306 display(OLED_RESET);

const int buttonHour = A1; // Pin für Stunden-Taste
const int buttonMinute = A2; // Pin für Minuten-Taste
const int buttonStart = A3; // Pin für Start-Taste


int hours = 23; // Set initial countdown hours
int minutes = 0; // Set initial countdown minutes
int seconds = 0; // Set initial countdown seconds

bool buttonHourPressed = false;
bool buttonMinutePressed = false;
bool buttonStartPressed = false;

const int ledPin = 6; // Define the pin for the LED
const int speakerPin = 7 ;

void setup() {
  Serial.begin(9600);
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(WHITE);
  pinMode(6, OUTPUT);

  stepper1.setMaxSpeed(2000);     // set the maximum speed
  stepper1.setSpeed(200);         // set initial speed
  stepper1.setAcceleration(50);   // set acceleration
  stepper1.setCurrentPosition(0); // set position

  pinMode(buttonHour, INPUT_PULLUP);
  pinMode(buttonMinute, INPUT_PULLUP);
  pinMode(buttonStart, INPUT_PULLUP);
}

void loop() {

  float degree = 360;  // im Uhrzeigersinn
  float moveRev = degree * SteppDegree;

  while (seconds > 0 || minutes > 0 || hours > 0 || buttonStartPressed == false) {

    display.clearDisplay();
    display.setCursor(0, 0);
    display.print("Countdown:\n");
    display.print(hours);
    display.print(":");
    display.print(minutes);
    display.print(":");
    display.println(seconds);
    display.display();

     if (digitalRead(buttonHour) == LOW && !buttonHourPressed) {
    hours = (hours + 1) % 24;
    buttonHourPressed = true;
  } else if (digitalRead(buttonHour) == HIGH) {
    buttonHourPressed = false;
  }

  if (digitalRead(buttonMinute) == LOW && !buttonMinutePressed) {
    minutes = (minutes + 1) % 60;
    buttonMinutePressed = true;
  } else if (digitalRead(buttonMinute) == HIGH) {
    buttonMinutePressed = false;
  }

  if (digitalRead(buttonStart) == LOW && !buttonStartPressed) {
    buttonStartPressed = true;
  }

  if (buttonStartPressed) {
    int initialHours = hours;
    int initialMinutes = minutes;
    while (seconds > 0 || minutes > 0 || hours > 0) {
      decrementTime();
    delay(1000); // Wait for 1 second
     }
    
  }

  }

  if (hours == 0 && minutes == 0 && seconds == 0) {

    stepper1.moveTo(-moveRev);  // - für Uhrzeigersinn
    stepper1.run();

    int sensorWert = analogRead(A0); // Read the sensor value
    Serial.println(sensorWert);
    delay(100);

    if (sensorWert < 500) {
      display.clearDisplay();
      display.setCursor(0, 0);
      display.print("Bitte Tabletten ");
      display.setCursor(0, 10);
      display.print("entnehmen");

      display.display();
    }
    else if (sensorWert > 500) {
      display.clearDisplay();
      display.setCursor(0, 0);
      display.print("Tabletten wurden");
      display.setCursor(0, 10);
      display.print("entnommen");
      display.display();
      delay(5000);
      digitalWrite(13, LOW);
      seconds = 3;
      minutes = initialMinutes;
      hours = initialHours;
    }

    // Für LED und Speaker
    digitalWrite(6, HIGH);
    tone(speakerPin, 1000);
    delay(200);
    digitalWrite(6, LOW);
    noTone(speakerPin);
    //delay(500);


  }
}

void decrementTime() {
  if (seconds > 0) {
    seconds--;
  } else if (minutes > 0) {
    minutes--;
    seconds = 59;
  } else if (hours > 0) {
    hours--;
    minutes = 59;
    seconds = 59;
  }
}