#include <EEPROM.h>

int potValues[5]; // Array to store potentiometer values
int presets[3][5]; // Array to store presets
int currentPreset = 0;

// Pin definitions
const int potPins[] = {A0, A1, A2, A3, A4};
const int buttonPins[] = {3, 4, 5, 6, 7}; // B1, B2, B3, Store

void setup() {
  // Initialize potentiometer pins
  for (int i = 0; i < 5; i++) {
    pinMode(potPins[i], INPUT);
  }
  
  // Initialize button pins
  for (int i = 0; i < 4; i++) {
    pinMode(buttonPins[i], INPUT_PULLUP);
  }
  
  // Load presets from EEPROM
  loadPresets();
  
  // Set initial potentiometer values to zero
  for (int i = 0; i < 5; i++) {
    potValues[i] = 0;
    analogWrite(potPins[i], potValues[i]);
  }
}

void loop() {
  // Read potentiometer values
  for (int i = 0; i < 5; i++) {
    potValues[i] = analogRead(potPins[i]) / 4;
    analogWrite(potPins[i], potValues[i]);
  }
  
  // Check if any button is pressed
  for (int i = 0; i < 4; i++) {
    if (digitalRead(buttonPins[i]) == LOW) {
      delay(50); // Debounce delay
      
      // Store Button pressed
      if (i == 3) {
        if (digitalRead(buttonPins[i]) == HIGH) {
          storePreset();
        }
      } 
      // Preset Button pressed
      else {
        if (digitalRead(buttonPins[i]) == HIGH) {
          recallPreset(i);
        }
      }
    }
  }
}

void storePreset() {
  for (int i = 0; i < 5; i++) {
    presets[currentPreset][i] = potValues[i];
  }

  // Save presets to EEPROM
  for (int i = 0; i < 3; i++) {
    for (int j = 0; j < 5; j++) {
      EEPROM.write(i * 5 + j, presets[i][j]);
    }
  }
}

void loadPresets() {
  for (int i = 0; i < 3; i++) {
    for (int j = 0; j < 5; j++) {
      presets[i][j] = EEPROM.read(i * 5 + j);
    }
  }
}

void recallPreset(int index) {
  currentPreset = index;
  
  for (int i = 0; i < 5; i++) {
    potValues[i] = presets[index][i];
    analogWrite(potPins[i], potValues[i]);
  }
}