// Copyright 2023 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "quiche/quic/moqt/tools/moqt_server.h"

#include <memory>
#include <utility>

#include "absl/status/statusor.h"
#include "absl/strings/string_view.h"
#include "quiche/quic/core/crypto/proof_source.h"
#include "quiche/quic/core/crypto/quic_crypto_server_config.h"
#include "quiche/quic/core/quic_connection_id.h"
#include "quiche/quic/core/quic_types.h"
#include "quiche/quic/core/quic_versions.h"
#include "quiche/quic/moqt/moqt_messages.h"
#include "quiche/quic/moqt/moqt_quic_config.h"
#include "quiche/quic/moqt/moqt_session.h"
#include "quiche/quic/tools/quic_server.h"
#include "quiche/quic/tools/web_transport_only_backend.h"
#include "quiche/web_transport/web_transport.h"

namespace moqt {

namespace {
quic::WebTransportRequestCallback CreateWebTransportCallback(
    MoqtIncomingSessionCallback callback, quic::QuicServer* server) {
  return [server = server, callback = std::move(callback)](
             absl::string_view path, webtransport::Session* session)
             -> absl::StatusOr<std::unique_ptr<webtransport::SessionVisitor>> {
    absl::StatusOr<MoqtConfigureSessionCallback> configurator = callback(path);
    if (!configurator.ok()) {
      return configurator.status();
    }
    MoqtSessionParameters parameters(quic::Perspective::IS_SERVER);
    auto moqt_session = std::make_unique<MoqtSession>(
        session, parameters, server->event_loop()->CreateAlarmFactory());
    std::move (*configurator)(moqt_session.get());
    return moqt_session;
  };
}
}  // namespace

MoqtServer::MoqtServer(std::unique_ptr<quic::ProofSource> proof_source,
                       MoqtIncomingSessionCallback callback)
    : backend_(CreateWebTransportCallback(std::move(callback), &server_)),
      server_(std::move(proof_source), /*proof_verifier=*/nullptr,
              GenerateQuicConfig(),
              quic::QuicCryptoServerConfig::ConfigOptions(),
              quic::CurrentSupportedVersionsWithTls(), &backend_,
              quic::kQuicDefaultConnectionIdLength) {}

}  // namespace moqt