#include <IRremote.h>

//declaring IR-Remote codes
const unsigned long value_0 = 3910598400;
const unsigned long value_1 = 3476094720;
const unsigned long value_2 = 3877175040;
const unsigned long value_3 = 2239430400;
const unsigned long value_4 = 4144561920;
const unsigned long value_5 = 3810328320;
const unsigned long value_6 = 2774204160;
const unsigned long value_7 = 3175284480;
const unsigned long value_8 = 2907897600;
const unsigned long value_9 = 3041591040;
const unsigned long value_pause = 3158572800;
const unsigned long value_plus = 3927310080;
const unsigned long value_minus = 4161273600;

//declaring Pins
const int remote_input = 12;

int redLedPins[] = {8, 9, 10};
int greenLedPins[] = {5, 6, 7};
int blueLedPins[] = {2, 3, 4};

int activeLedGroups[9] = {0}; // array for all current active led-pins (0 = None)

//creating object for IR-Sensor
IRrecv irrecv(remote_input);

bool checkIrInput() {
  /*
    checks if the IR-receiver detected an IR-input.
    When an input is detected checks which button is pressed
    and changes the led-lighting mode arccodingly

    returns true when an IrInput was detected and false when there was
    no Input detected
  */

  //when the IR-receiver detects an input
  if (irrecv.decode()) {
    unsigned long remote_data = irrecv.decodedIRData.decodedRawData;
    Serial.println(remote_data);

    //checks wjich button got pressed on the remote
    switch (remote_data) {
      case value_1: // switch red leds
        Serial.println("Toggle red leds");
        toggleLedGroup(redLedPins, 3);
        break;
      case value_2: // switch green leds
        Serial.println("Toggle green leds");
        toggleLedGroup(greenLedPins, 3);
        break;
      case value_3: // switch blue leds
        Serial.println("Toggle blue leds");
        toggleLedGroup(blueLedPins, 3);
        break;

      case value_8:
        //pLedModeFunc = seq_leds;
        Serial.println("Mode changed to seq_leds");
        break;
      case value_9:
        //pLedModeFunc = static_leds;
        Serial.println("Mode changed to static_leds");
        break;
    }
    
    irrecv.resume();
    return true;
  }
  return false;
}

void setup() {
  irrecv.enableIRIn(); //enabling the IR-receiver
  Serial.begin(9600); //Serial for debug printing
  // initialise led pins as output pins
  for (int i = 0; i < 3; i++) {
    pinMode(redLedPins[i], OUTPUT);
    pinMode(greenLedPins[i], OUTPUT);
    pinMode(blueLedPins[i], OUTPUT);
  }

  Serial.println("Starting process finished");
}


void loop() {
  if (checkIrInput()) {
    Serial.println("Remote Input");
  }
  // Schalte alle aktiven LEDs ein
  for (int i = 0; i < 9; i++) {
    if (activeLedGroups[i] != 0) {
      digitalWrite(activeLedGroups[i], HIGH);
    }
  }
  
  // Schalte alle inaktiven LEDs aus
  for (int i = 0; i < 9; i++) {
    if (activeLedGroups[i] != 0) {
      bool isActive = false;
      for (int j = 0; j < 9; j++) {
        if (activeLedGroups[j] == activeLedGroups[i] && i != j) {
          isActive = true;
        }
      }
      if (!isActive) {
        digitalWrite(activeLedGroups[i], LOW);
      }
    }
  }
}

void toggleLedGroup(int ledPins[], int numLeds) {
  bool isActive = false;
  for (int i = 0; i < numLeds; i++) {
    for (int j = 0; j < 9; j++) {
      if (activeLedGroups[j] == ledPins[i]) {
        isActive = true;
      }
    }
  }
  if (!isActive) {
    addLedGroup(ledPins, numLeds);
  } else {
    removeLedGroup(ledPins, numLeds);
  }
  Serial.print("activeLedGroups: ");
  for (int i = 0; i < 9; i++) {
    Serial.print(activeLedGroups[i]);
  }
  Serial.println("");
}

void addLedGroup(int ledPins[], int numLeds) {
  int index = 0;
  while (activeLedGroups[index] != 0 && index < 9) {
    index++;
  }
  if (index < 9) {
    for (int i = 0; i < numLeds; i++) {
      activeLedGroups[index + i] = ledPins[i];
    }
  }
}

void removeLedGroup(int ledPins[], int numLeds) {
  for (int i = 0; i < 9; i++) {
    if (activeLedGroups[i] == ledPins[0]) {
      for (int j = 0; j < numLeds; j++) {
        activeLedGroups[i + j] = 0;
      }
      break;
    }
  }
}