// If not found nullptr is returned.
// DEPRECATED: Do not use, prefer GetTargetHardwareFactory instead.
const TargetHardware* GetTargetHardware(const std::string& hardware_name);

// Returns the factory method for the requested hardware if present.
std::function<std::unique_ptr<TargetHardware>()> GetTargetHardwareFactory(
    const std::string& hardware_name);

namespace internal {

TacModule::InstantiateBackends() {
  std::vector<std::unique_ptr<tac::TargetHardware>> backends;
  for (const auto& hardware_name : options_.hardware_backends) {
    auto factory = tac::GetTargetHardwareFactory(hardware_name);
    backends.emplace_back(factory());
    backends.back()->Init();
  }
  return backends;
}

absl::Status TacModule::Run() {
  // Construct all backends.

    if (hardware.unique_name == canonical_name) {
      return hardware.target_hardware.get();
    }
  }
  return nullptr;
}

std::function<std::unique_ptr<TargetHardware>()> GetTargetHardwareFactory(
    const std::string& hardware_name) {
  const std::string canonical_name = GetCanonicalHardwareName(hardware_name);
  // Just loop for now, we don't expect number of hardwares to be huge.