#include "kernel/filesystem/device_inode.hpp"

#include "kapi/system.hpp"

#include "kernel/devices/device.hpp"
#include "kernel/filesystem/inode.hpp"

#include <kstd/memory>

#include <cstddef>

namespace filesystem
{
  device_inode::device_inode(kstd::shared_ptr<devices::device> const & device)
      : inode(inode_kind::device)
      , m_device(device)
  {
    if (!device)
    {
      kapi::system::panic("[FILESYSTEM] device_inode constructed with null device.");
    }
  }

  auto device_inode::backing_device() const -> kstd::shared_ptr<devices::device> const &
  {
    return m_device;
  }

  auto device_inode::read(void * /*buffer*/, size_t /*offset*/, size_t /*size*/) const -> size_t
  {
    if (!m_device)
    {
      kapi::system::panic("[FILESYSTEM] device_inode has null device.");
    }

    // TODO BA-FS26 use device file?
    // return m_device->read(buffer, offset, size);
    return 0;
  }

  auto device_inode::write(void const * /*buffer*/, size_t /*offset*/, size_t /*size*/) -> size_t
  {
    if (!m_device)
    {
      kapi::system::panic("[FILESYSTEM] device_inode has null device.");
    }

    // TODO BA-FS26 use device file?
    // return m_device->write(buffer, offset, size);
    return 0;
  }
}  // namespace filesystem