#include <kernel/filesystem/filesystem.hpp>

#include <kernel/filesystem/ext2/filesystem.hpp>
#include <kernel/filesystem/inode.hpp>

#include <kapi/system.hpp>

#include <kstd/memory>

#include <array>

namespace kernel::filesystem
{
  namespace
  {
    constexpr auto static filesystem_factories = std::array{
      []() { return kstd::make_shared<ext2::filesystem>(); },
    };
  }  // namespace

  auto filesystem::probe_and_mount(kstd::shared_ptr<inode> const & backing_inode) -> kstd::shared_ptr<filesystem>
  {
    if (!backing_inode)
    {
      kapi::system::panic("[FILESYSTEM] cannot mount filesystem: backing inode is null.");
    }

    for (auto & factory : filesystem_factories)
    {
      auto fs = factory();
      if (fs->mount(backing_inode) == operation_result::success)
      {
        return fs;
      }
    }

    return nullptr;
  }

  auto filesystem::mount(kstd::shared_ptr<inode> const & backing_inode) -> operation_result
  {
    if (!backing_inode)
    {
      kapi::system::panic("[FILESYSTEM] cannot mount filesystem: backing inode is null.");
    }

    m_backing_inode = backing_inode;
    return operation_result::success;
  }

  auto filesystem::root_inode() const -> kstd::shared_ptr<inode> const &
  {
    return m_root_inode;
  }

  auto filesystem::backing_inode() const -> kstd::shared_ptr<inode> const &
  {
    return m_backing_inode;
  }
}  // namespace kernel::filesystem