#include <Arduino.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <RotaryEncoder.h>

#define PIN_IN1 32
#define PIN_IN2 35
#define BUTTON_PIN 16
#define LED 17

#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels

// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);
RotaryEncoder encoder(PIN_IN1, PIN_IN2, RotaryEncoder::LatchMode::TWO03);

const char *menu[] = {"Gekochte Eier hart",
                "Gekochte Eier weich",
                "Avocado-Toast",
                "Spiegelei",
                "Pancakes"};
int anzahl = 5;

int zeit[5] = {1, 2, 3, 4, 5};

int buttonState = 0;

int taster = 1;

int pressed = 0;

void setup() {
  Serial.begin(115200);
  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3D for 128x64
    for(;;);
  }
  delay(50);
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor(0, 10);
  // Display static text
  display.println("Gericht durch Drehen auswaehlen und durch Druecken besteatigen");
  display.display();

pinMode(BUTTON_PIN, INPUT_PULLUP);  
pinMode(LED, OUTPUT);

}

void loop() {
  static int pos = 0;
  static int wahl = 0;
  encoder.tick();
  int newPos = encoder.getPosition();
  if (pos != newPos) {
    Serial.print("pos:");
    Serial.print(newPos);
    Serial.print(" dir:");
    Serial.println((int)(encoder.getDirection()));
    wahl = newPos % anzahl;
    wahl = wahl < 0 ? -wahl : wahl;
    Serial.println(menu[wahl]);
    pos = newPos;
    display.clearDisplay();
    display.setCursor(0, 10);
    display.println(menu[wahl]);
    display.display();
    pressed = 0;
  }

  buttonState = digitalRead(BUTTON_PIN);

  if (buttonState == LOW) {taster = 1;}
  if (buttonState == HIGH) {taster = 0;}

  if (taster == 1 && pressed == 0){
    display.clearDisplay();
    display.setCursor(0, 10);
    display.print("Dauer: ");
    display.print(zeit[wahl]);
    display.println(" Sekunden\n");
    display.println("Timer starten?");
    display.display();
    Serial.print(zeit[wahl]);
    Serial.println(" Sekunden");
    delay(200);
    pressed = 1;
    taster = 0;
    
  }

  if (taster == 1 && pressed == 1){
      pressed = 0;
      int aktuelleZeit = zeit[wahl];
      for (int i = aktuelleZeit; i >= 1; i--) {

          display.clearDisplay();
          display.setCursor(0, 10);
          display.print(i);
          display.println(" Sek. verbleibend");
          display.display();
          Serial.write(i);
          Serial.write("Sek. verbleibend");
          delay(1000);

          if (i == 1){
            analogWrite(LED, HIGH);
            display.clearDisplay();
            display.println("fertig!");
            display.display();
            delay(3000);
          }
      }
    analogWrite(LED, LOW);
    display.clearDisplay();
    display.setCursor(0, 10);
    display.println("Gericht durch Drehen auswaehlen und durch Druecken besteatigen");
    display.display();
  }
  
}