/*
 *
 * Copyright 2015 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 <string.h>

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

#include "src/core/lib/channel/channel_args.h"
#include "src/core/lib/iomgr/exec_ctx.h"
#include "test/core/util/test_config.h"

static void test_create(void) {
  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;

  grpc_arg arg_int;
  grpc_arg arg_string;
  grpc_arg to_add[2];
  grpc_channel_args *ch_args;

  arg_int.key = "int_arg";
  arg_int.type = GRPC_ARG_INTEGER;
  arg_int.value.integer = 123;

  arg_string.key = "str key";
  arg_string.type = GRPC_ARG_STRING;
  arg_string.value.string = "str value";

  to_add[0] = arg_int;
  to_add[1] = arg_string;
  ch_args = grpc_channel_args_copy_and_add(NULL, to_add, 2);

  GPR_ASSERT(ch_args->num_args == 2);
  GPR_ASSERT(strcmp(ch_args->args[0].key, arg_int.key) == 0);
  GPR_ASSERT(ch_args->args[0].type == arg_int.type);
  GPR_ASSERT(ch_args->args[0].value.integer == arg_int.value.integer);

  GPR_ASSERT(strcmp(ch_args->args[1].key, arg_string.key) == 0);
  GPR_ASSERT(ch_args->args[1].type == arg_string.type);
  GPR_ASSERT(strcmp(ch_args->args[1].value.string, arg_string.value.string) ==
             0);

  grpc_channel_args_destroy(&exec_ctx, ch_args);
  grpc_exec_ctx_finish(&exec_ctx);
}

static void test_set_compression_algorithm(void) {
  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
  grpc_channel_args *ch_args;

  ch_args =
      grpc_channel_args_set_compression_algorithm(NULL, GRPC_COMPRESS_GZIP);
  GPR_ASSERT(ch_args->num_args == 1);
  GPR_ASSERT(strcmp(ch_args->args[0].key,
                    GRPC_COMPRESSION_CHANNEL_DEFAULT_ALGORITHM) == 0);
  GPR_ASSERT(ch_args->args[0].type == GRPC_ARG_INTEGER);

  grpc_channel_args_destroy(&exec_ctx, ch_args);
  grpc_exec_ctx_finish(&exec_ctx);
}

static void test_compression_algorithm_states(void) {
  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
  grpc_channel_args *ch_args, *ch_args_wo_gzip, *ch_args_wo_gzip_deflate;
  unsigned states_bitset;
  size_t i;

  ch_args = grpc_channel_args_copy_and_add(NULL, NULL, 0);
  /* by default, all enabled */
  states_bitset =
      (unsigned)grpc_channel_args_compression_algorithm_get_states(ch_args);

  for (i = 0; i < GRPC_COMPRESS_ALGORITHMS_COUNT; i++) {
    GPR_ASSERT(GPR_BITGET(states_bitset, i));
  }

  /* disable gzip and deflate */
  ch_args_wo_gzip = grpc_channel_args_compression_algorithm_set_state(
      &exec_ctx, &ch_args, GRPC_COMPRESS_GZIP, 0);
  GPR_ASSERT(ch_args == ch_args_wo_gzip);
  ch_args_wo_gzip_deflate = grpc_channel_args_compression_algorithm_set_state(
      &exec_ctx, &ch_args_wo_gzip, GRPC_COMPRESS_DEFLATE, 0);
  GPR_ASSERT(ch_args_wo_gzip == ch_args_wo_gzip_deflate);

  states_bitset = (unsigned)grpc_channel_args_compression_algorithm_get_states(
      ch_args_wo_gzip_deflate);
  for (i = 0; i < GRPC_COMPRESS_ALGORITHMS_COUNT; i++) {
    if (i == GRPC_COMPRESS_GZIP || i == GRPC_COMPRESS_DEFLATE) {
      GPR_ASSERT(GPR_BITGET(states_bitset, i) == 0);
    } else {
      GPR_ASSERT(GPR_BITGET(states_bitset, i) != 0);
    }
  }

  /* re-enabled gzip only */
  ch_args_wo_gzip = grpc_channel_args_compression_algorithm_set_state(
      &exec_ctx, &ch_args_wo_gzip_deflate, GRPC_COMPRESS_GZIP, 1);
  GPR_ASSERT(ch_args_wo_gzip == ch_args_wo_gzip_deflate);

  states_bitset = (unsigned)grpc_channel_args_compression_algorithm_get_states(
      ch_args_wo_gzip);
  for (i = 0; i < GRPC_COMPRESS_ALGORITHMS_COUNT; i++) {
    if (i == GRPC_COMPRESS_DEFLATE) {
      GPR_ASSERT(GPR_BITGET(states_bitset, i) == 0);
    } else {
      GPR_ASSERT(GPR_BITGET(states_bitset, i) != 0);
    }
  }

  grpc_channel_args_destroy(&exec_ctx, ch_args);
  grpc_exec_ctx_finish(&exec_ctx);
}

static void test_set_socket_mutator(void) {
  grpc_channel_args *ch_args;
  grpc_socket_mutator mutator;
  grpc_socket_mutator_init(&mutator, NULL);

  ch_args = grpc_channel_args_set_socket_mutator(NULL, &mutator);
  GPR_ASSERT(ch_args->num_args == 1);
  GPR_ASSERT(strcmp(ch_args->args[0].key, GRPC_ARG_SOCKET_MUTATOR) == 0);
  GPR_ASSERT(ch_args->args[0].type == GRPC_ARG_POINTER);

  {
    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
    grpc_channel_args_destroy(&exec_ctx, ch_args);
    grpc_exec_ctx_finish(&exec_ctx);
  }
}

int main(int argc, char **argv) {
  grpc_test_init(argc, argv);
  grpc_init();
  test_create();
  test_set_compression_algorithm();
  test_compression_algorithm_states();
  test_set_socket_mutator();
  grpc_shutdown();
  return 0;
}