#pragma once

#include <Arduino.h>

#include <cstdio>
#include <string>

namespace roro::identity {

// Node number as Meshtastic derives it: the last four bytes of the chip's MAC address.
inline uint32_t nodeNum() {
    uint64_t mac = ESP.getEfuseMac();  // byte 0 of the MAC is the lowest byte
    auto byte = [mac](int i) { return static_cast<uint32_t>((mac >> (8 * i)) & 0xFF); };
    return (byte(2) << 24) | (byte(3) << 16) | (byte(4) << 8) | byte(5);
}

// "!2f762fa4"
inline std::string nodeId() {
    char buf[12];
    std::snprintf(buf, sizeof(buf), "!%08lx", static_cast<unsigned long>(nodeNum()));
    return buf;
}

// Suggested names for the setup wizard: "roro9stack 2fa4" and "2fa4".
inline std::string defaultShortName() {
    char buf[8];
    std::snprintf(buf, sizeof(buf), "%04lx", static_cast<unsigned long>(nodeNum() & 0xFFFF));
    return buf;
}
inline std::string defaultLongName() { return "roro9stack " + defaultShortName(); }

}  // namespace roro::identity