/*
 *
 * Copyright 2018 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 <stdio.h>
#include <stdlib.h>
#include <string.h>

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

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

#define ALTS_CLIENT_OPTIONS_TEST_TARGET_SERVICE_ACCOUNT_1 "abc@google.com"
#define ALTS_CLIENT_OPTIONS_TEST_TARGET_SERVICE_ACCOUNT_2 "def@google.com"

const size_t kTargetServiceAccountNum = 2;

static void test_copy_client_options_failure() {
  /* Initialization. */
  grpc_alts_credentials_options* options =
      grpc_alts_credentials_client_options_create();
  /* Test. */
  GPR_ASSERT(grpc_alts_credentials_options_copy(nullptr) == nullptr);
  /* Cleanup. */
  grpc_alts_credentials_options_destroy(options);
}

static size_t get_target_service_account_num(
    grpc_alts_credentials_options* options) {
  auto client_options =
      reinterpret_cast<grpc_alts_credentials_client_options*>(options);
  size_t num = 0;
  target_service_account* node = client_options->target_account_list_head;
  while (node != nullptr) {
    num++;
    node = node->next;
  }
  return num;
}

static void test_client_options_api_success() {
  /* Initialization. */
  grpc_alts_credentials_options* options =
      grpc_alts_credentials_client_options_create();
  /* Set client options fields. */
  grpc_alts_credentials_client_options_add_target_service_account(
      options, ALTS_CLIENT_OPTIONS_TEST_TARGET_SERVICE_ACCOUNT_1);
  grpc_alts_credentials_client_options_add_target_service_account(
      options, ALTS_CLIENT_OPTIONS_TEST_TARGET_SERVICE_ACCOUNT_2);
  /* Validate client option fields. */
  GPR_ASSERT(get_target_service_account_num(options) ==
             kTargetServiceAccountNum);
  auto client_options =
      reinterpret_cast<grpc_alts_credentials_client_options*>(options);
  GPR_ASSERT(strcmp(client_options->target_account_list_head->data,
                    ALTS_CLIENT_OPTIONS_TEST_TARGET_SERVICE_ACCOUNT_2) == 0);
  GPR_ASSERT(strcmp(client_options->target_account_list_head->next->data,
                    ALTS_CLIENT_OPTIONS_TEST_TARGET_SERVICE_ACCOUNT_1) == 0);
  /* Perform a copy operation and validate its correctness. */
  grpc_alts_credentials_options* new_options =
      grpc_alts_credentials_options_copy(options);
  GPR_ASSERT(get_target_service_account_num(new_options) ==
             kTargetServiceAccountNum);
  auto new_client_options =
      reinterpret_cast<grpc_alts_credentials_client_options*>(new_options);
  GPR_ASSERT(strcmp(new_client_options->target_account_list_head->data,
                    ALTS_CLIENT_OPTIONS_TEST_TARGET_SERVICE_ACCOUNT_2) == 0);
  GPR_ASSERT(strcmp(new_client_options->target_account_list_head->next->data,
                    ALTS_CLIENT_OPTIONS_TEST_TARGET_SERVICE_ACCOUNT_1) == 0);
  /* Cleanup.*/
  grpc_alts_credentials_options_destroy(options);
  grpc_alts_credentials_options_destroy(new_options);
}

int main(int argc, char** argv) {
  /* Test. */
  test_copy_client_options_failure();
  test_client_options_api_success();
  return 0;
}