#pragma once

#include <stdint.h>

namespace esphome {
namespace grub_boot_switch {

// Built at runtime from configuration values so VID/PID/strings can be tuned
// from YAML.  Lifetime: descriptors live forever once built (single device).
struct UsbDescriptorBundle {
  // tusb_desc_device_t struct (18 bytes), kept opaque here to avoid leaking
  // tusb headers into the rest of the component.
  uint8_t device[18];

  // Configuration descriptor: 9 (config) + 9 (interface) + 2*7 (endpoints) = 32 bytes.
  uint8_t config[32];

  // String descriptors: index 0 = lang (English), 1 = manufacturer,
  // 2 = product, 3 = serial.  ASCII C-strings, null terminated.
  const char *strings[4];
  char serial_buf[24];  // backing store for the auto-generated serial.
};

// Populate the bundle from runtime values.  The serial_buf is filled with the
// chip's MAC address ("E072A1D54520") if `serial_override` is null/empty.
void usb_descriptors_build(UsbDescriptorBundle *bundle, uint16_t vid, uint16_t pid,
                           const char *manufacturer, const char *product,
                           const char *serial_override);

}  // namespace grub_boot_switch
}  // namespace esphome