/*
 *
 * 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.
 *
 */

#ifndef GRPC_CORE_LIB_SECURITY_CREDENTIALS_FAKE_FAKE_CREDENTIALS_H
#define GRPC_CORE_LIB_SECURITY_CREDENTIALS_FAKE_FAKE_CREDENTIALS_H

#include <grpc/support/port_platform.h>

#include <string.h>

#include "src/core/lib/security/credentials/credentials.h"

#define GRPC_ARG_FAKE_SECURITY_EXPECTED_TARGETS \
  "grpc.fake_security.expected_targets"

/* -- Fake transport security credentials. -- */

/* Creates a fake transport security credentials object for testing. */
grpc_channel_credentials* grpc_fake_transport_security_credentials_create(void);

/* Creates a fake server transport security credentials object for testing. */
grpc_server_credentials* grpc_fake_transport_security_server_credentials_create(
    void);

/* Used to verify the target names given to the fake transport security
 * connector.
 *
 * The syntax of \a expected_targets by example:
 * For LB channels:
 *     "backend_target_1,backend_target_2,...;lb_target_1,lb_target_2,..."
 * For regular channels:
 *     "backend_taget_1,backend_target_2,..."
 *
 * That is to say, LB channels have a heading list of LB targets separated from
 * the list of backend targets by a semicolon. For non-LB channels, only the
 * latter is present. */
grpc_arg grpc_fake_transport_expected_targets_arg(char* expected_targets);

/* Return the value associated with the expected targets channel arg or NULL */
const char* grpc_fake_transport_get_expected_targets(
    const grpc_channel_args* args);

/* --  Metadata-only Test credentials. -- */

class grpc_md_only_test_credentials : public grpc_call_credentials {
 public:
  grpc_md_only_test_credentials(const char* md_key, const char* md_value)
      : grpc_call_credentials(GRPC_CALL_CREDENTIALS_TYPE_OAUTH2,
                              GRPC_SECURITY_NONE),
        key_(grpc_core::Slice::FromCopiedString(md_key)),
        value_(grpc_core::Slice::FromCopiedString(md_value)) {}

  grpc_core::ArenaPromise<absl::StatusOr<grpc_core::ClientInitialMetadata>>
  GetRequestMetadata(grpc_core::ClientInitialMetadata initial_metadata,
                     const GetRequestMetadataArgs* args) override;

  std::string debug_string() override { return "MD only Test Credentials"; };

 private:
  int cmp_impl(const grpc_call_credentials* other) const override {
    // TODO(yashykt): Check if we can do something better here
    return grpc_core::QsortCompare(
        static_cast<const grpc_call_credentials*>(this), other);
  }

  grpc_core::Slice key_;
  grpc_core::Slice value_;
};

#endif /* GRPC_CORE_LIB_SECURITY_CREDENTIALS_FAKE_FAKE_CREDENTIALS_H */
