#include "kernel/filesystem/device_inode.hpp"

#include "kapi/devices/device.hpp"
#include "kapi/system.hpp"

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

#include <kstd/memory>

#include <cstddef>

namespace kernel::filesystem
{
  device_inode::device_inode(kstd::shared_ptr<kapi::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::read(void * buffer, size_t offset, size_t size) const -> size_t
  {
    if (m_device->is_block_device())
    {
      return devices::block_device_utils::read(m_device, buffer, offset, size);
    }
    else
    {
      kapi::system::panic("[FILESYSTEM] device_file::read called on non-block device.");
    }
  }

  auto device_inode::write(void const * buffer, size_t offset, size_t size) -> size_t
  {
    if (m_device->is_block_device())
    {
      return devices::block_device_utils::write(m_device, buffer, offset, size);
    }
    else
    {
      kapi::system::panic("[FILESYSTEM] device_file::write called on non-block device.");
    }
  }

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

}  // namespace kernel::filesystem