#include <Arduino.h>
#include <NimBLEDevice.h>

static const char* DEVICE_NAME = "ESP32-C6 Demo";
static NimBLEUUID SERVICE_UUID("6E400001-B5A3-F393-E0A9-E50E24DCCA9E");
static NimBLEUUID CHAR_UUID   ("6E400002-B5A3-F393-E0A9-E50E24DCCA9E");

NimBLEServer*         gServer = nullptr;
NimBLEService*        gService = nullptr;
NimBLECharacteristic* gChar = nullptr;

void startBLE() {
  NimBLEDevice::init(DEVICE_NAME);

  gServer  = NimBLEDevice::createServer();
  gService = gServer->createService(SERVICE_UUID);

  gChar = gService->createCharacteristic(
    CHAR_UUID,
    NIMBLE_PROPERTY::READ
  );
  gChar->setValue("Hello from ESP32-C6!");
  gService->start();

  NimBLEAdvertising* adv = NimBLEDevice::getAdvertising();

  // Advertise our service UUID
  adv->addServiceUUID(SERVICE_UUID);

  // (v2.x) Build advertising + scan-response payloads explicitly
  NimBLEAdvertisementData advData;
  advData.setFlags(0x06); // LE General Discoverable + BR/EDR Not Supported

  NimBLEAdvertisementData scanData;
  scanData.setName(DEVICE_NAME); // put the name in scan response
  // you can also add manufacturer data here if you want:
  // std::string mfg = "\x34\x12C6"; scanData.setManufacturerData(mfg);

  adv->setAdvertisementData(advData);
  adv->setScanResponseData(scanData);

  // Appearance is still supported
  adv->setAppearance(0x0200); // Generic Tag

  NimBLEDevice::startAdvertising();
}

void setup() {
  Serial.begin(115200);
  while (!Serial) { delay(10); }
  startBLE();
  Serial.println("Advertising as ESP32-C6 Demo. Open nRF Connect -> Scan.");
}

void loop() {
  delay(1000);
}