#include <esp_now.h>
#include <WiFi.h>

#define NUM_BUTTONS 6
#define DEBOUNCE_DELAY 50 // milliseconds

// Define button pins
const int buttonPins[NUM_BUTTONS] = {14, 27, 26, 25, 33, 32};

// Debounce and state variables
bool buttonState[NUM_BUTTONS] = {false};
bool lastButtonState[NUM_BUTTONS] = {false};
unsigned long lastDebounceTime[NUM_BUTTONS] = {0};

// Define a struct to hold the button number
typedef struct struct_message {
  int buttonNumber;
} struct_message;

struct_message myData;

uint8_t receiverMacAddress[] = {0x24, 0x6F, 0x28, 0xAB, 0xCD, 0xEF}; // Replace with actual MAC

void setup() {
  Serial.begin(115200);
  
  // Initialize button pins
  for (int i = 0; i < NUM_BUTTONS; i++) {
    pinMode(buttonPins[i], INPUT_PULLUP);
  }

  // Set WiFi to station mode and initialize ESP-NOW
  WiFi.mode(WIFI_STA);
  if (esp_now_init() != ESP_OK) {
    Serial.println("Error initializing ESP-NOW");
    return;
  }

  // Register peer
  esp_now_peer_info_t peerInfo;
  memcpy(peerInfo.peer_addr, receiverMacAddress, 6);
  peerInfo.channel = 0;
  peerInfo.encrypt = false;

  if (esp_now_add_peer(&peerInfo) != ESP_OK) {
    Serial.println("Failed to add peer");
    return;
  }
}

void loop() {
  for (int i = 0; i < NUM_BUTTONS; i++) {
    int reading = digitalRead(buttonPins[i]);

    // Check if button state has changed
    if (reading != lastButtonState[i]) {
      lastDebounceTime[i] = millis();  // Reset debounce timer
    }

    if ((millis() - lastDebounceTime[i]) > DEBOUNCE_DELAY) {
      // If the button state has changed and stabilized
      if (reading != buttonState[i]) {
        buttonState[i] = reading;

        // Send toggle message if button is pressed (LOW state due to INPUT_PULLUP)
        if (buttonState[i] == LOW) {
          myData.buttonNumber = i + 1;  // Send button number (1 to 6)
          
          // Send the data
          esp_err_t result = esp_now_send(receiverMacAddress, (uint8_t *) &myData, sizeof(myData));
          
          if (result == ESP_OK) {
            Serial.println("Sent button press");
          } else {
            Serial.println("Error sending data");
          }
        }
      }
    }
    
    lastButtonState[i] = reading;
  }
}