//
//
// Copyright 2016 gRPC authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
//

#include <grpc/support/port_platform.h>

#include "src/core/ext/transport/cronet/client/secure/cronet_channel_create.h"

#include "absl/status/statusor.h"

#include <grpc/impl/channel_arg_names.h>
#include <grpc/support/log.h>

#include "src/core/ext/transport/cronet/transport/cronet_transport.h"
#include "src/core/lib/channel/channel_args.h"
#include "src/core/lib/channel/channel_args_preconditioning.h"
#include "src/core/lib/config/core_configuration.h"
#include "src/core/lib/gprpp/ref_counted_ptr.h"
#include "src/core/lib/iomgr/exec_ctx.h"
#include "src/core/lib/surface/channel.h"
#include "src/core/lib/surface/channel_stack_type.h"
#include "src/core/lib/transport/transport_fwd.h"
#include "src/core/lib/transport/transport_impl.h"

// Cronet transport object
typedef struct cronet_transport {
  grpc_transport base;  // must be first element in this structure
  void* engine;
  char* host;
} cronet_transport;

extern grpc_transport_vtable grpc_cronet_vtable;

GRPCAPI grpc_channel* grpc_cronet_secure_channel_create(
    void* engine, const char* target, const grpc_channel_args* args,
    void* reserved) {
  gpr_log(GPR_DEBUG,
          "grpc_create_cronet_transport: stream_engine = %p, target=%s", engine,
          target);

  // Disable client authority filter when using Cronet
  auto channel_args = grpc_core::CoreConfiguration::Get()
                          .channel_args_preconditioning()
                          .PreconditionChannelArgs(args)
                          .Set(GRPC_ARG_DISABLE_CLIENT_AUTHORITY_FILTER, 1);

  grpc_transport* ct = grpc_create_cronet_transport(
      engine, target, channel_args.ToC().get(), reserved);

  grpc_core::ExecCtx exec_ctx;
  auto channel = grpc_core::Channel::Create(target, channel_args,
                                            GRPC_CLIENT_DIRECT_CHANNEL, ct);
  return channel.ok() ? channel->release()->c_ptr() : nullptr;
}
