/*
Titel: Led dimmen / Übung für Test
Author: Gregor Mausser
Date: 14.1.2026
*/

const int LedPin = 3;
const int ButtonPin = 5;

int mode = 0;
int LedValue = 0;

// Für Flankenerkennung
bool lastButtonState = HIGH;

// ---------- DIMM-FUNKTIONEN ----------

// 0 → maxValue
void dimUp1(int maxValue) {
  for (int i = 0; i <= maxValue; i++) {
    analogWrite(LedPin, i);
    LedValue = i;
    Serial.println(i);
    delay(10);
  }
}

// start → end
void dimUpR(int start, int end) {
  for (int i = start; i <= end; i++) {
    analogWrite(LedPin, i);
    LedValue = i;
    delay(10);
  }
}

// maxValue → minValue
void dimDown(int maxValue, int minValue) {
  for (int i = maxValue; i >= minValue; i--) {
    analogWrite(LedPin, i);
    LedValue = i;
    Serial.println(i);
    delay(10);
  }
}

// ---------- SETUP ----------
void setup() {
  Serial.begin(9600);
  pinMode(LedPin, OUTPUT);
  pinMode(ButtonPin, INPUT_PULLUP);
}

// ---------- LOOP MIT FLANKENERKENNUNG ----------
void loop() {
  int state = digitalRead(ButtonPin);
  bool reading = digitalRead(ButtonPin);

  // Flankenerkennung: nur reagieren, wenn Taste neu gedrückt wird
  if (reading == LOW && lastButtonState == HIGH) {

    mode++;
    Serial.print("Tastendruck erkannt, Counter = ");
    Serial.println(mode);

    switch (mode) {

      // 0% → 100%
      case 1:
        dimUp1(255);
        break;

      // 100% → 50%
      case 2:
        dimDown(255, 127);
        break;

      // 50% → 0%
      case 3:
        dimDown(127, 0);
        break;

      // 50% → 80%
      case 4:
        dimUpR(127, 200);
        break;

      // 80% → 0%
      case 5:
        dimDown(200, 0);
        break;

      // LED aus + Reset
      default:
        analogWrite(LedPin, 0);
        Serial.println("Led ist OFF");
        mode = 0;
        break;
    }
  }

  // Zustand merken für nächste Flanke
  lastButtonState = reading;

  // ---------- SERIAL PLOTTER ----------
Serial.print(mode);
Serial.print(" ");
Serial.print(LedValue);
Serial.print(" ");
Serial.println(digitalRead(ButtonPin));
}