/*
 *
 * 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.
 *
 */

/*
 * This test file is derived from fixture h2_ssl.c in core end2end test
 * (test/core/end2end/fixture/h2_ssl.c). The structure of the fixture is
 * preserved as much as possible
 *
 * This fixture creates a server full stack using chttp2 and a client
 * full stack using Cronet. End-to-end tests are run against this
 * configuration
 *
 */

#import <XCTest/XCTest.h>
#include "test/core/end2end/end2end_tests.h"

#include <stdio.h>
#include <string.h>

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

#include "src/core/lib/channel/channel_args.h"
#include "src/core/lib/gpr/env.h"
#include "src/core/lib/gpr/host_port.h"
#include "src/core/lib/gpr/string.h"
#include "src/core/lib/gpr/tmpfile.h"
#include "src/core/lib/security/credentials/credentials.h"
#include "test/core/end2end/data/ssl_test_data.h"
#include "test/core/util/port.h"
#include "test/core/util/test_config.h"

#import <Cronet/Cronet.h>
#include <grpc/grpc_cronet.h>

typedef struct fullstack_secure_fixture_data {
  char *localaddr;
} fullstack_secure_fixture_data;

static grpc_end2end_test_fixture chttp2_create_fixture_secure_fullstack(
    grpc_channel_args *client_args, grpc_channel_args *server_args) {
  grpc_end2end_test_fixture f;
  int port = grpc_pick_unused_port_or_die();
  fullstack_secure_fixture_data *ffd =
      (fullstack_secure_fixture_data *)gpr_malloc(sizeof(fullstack_secure_fixture_data));
  memset(&f, 0, sizeof(f));

  gpr_join_host_port(&ffd->localaddr, "127.0.0.1", port);

  f.fixture_data = ffd;
  f.cq = grpc_completion_queue_create_for_next(NULL);
  f.shutdown_cq = grpc_completion_queue_create_for_pluck(NULL);

  return f;
}

static void process_auth_failure(void *state, grpc_auth_context *ctx, const grpc_metadata *md,
                                 size_t md_count, grpc_process_auth_metadata_done_cb cb,
                                 void *user_data) {
  GPR_ASSERT(state == NULL);
  cb(user_data, NULL, 0, NULL, 0, GRPC_STATUS_UNAUTHENTICATED, NULL);
}

static void cronet_init_client_secure_fullstack(grpc_end2end_test_fixture *f,
                                                grpc_channel_args *client_args,
                                                stream_engine *cronetEngine) {
  fullstack_secure_fixture_data *ffd = (fullstack_secure_fixture_data *)f->fixture_data;
  grpc_arg arg;
  arg.key = const_cast<char *>(GRPC_ARG_DISABLE_CLIENT_AUTHORITY_FILTER);
  arg.type = GRPC_ARG_INTEGER;
  arg.value.integer = 1;
  client_args = grpc_channel_args_copy_and_add(client_args, &arg, 1);
  f->client = grpc_cronet_secure_channel_create(cronetEngine, ffd->localaddr, client_args, NULL);
  grpc_channel_args_destroy(client_args);
  GPR_ASSERT(f->client != NULL);
}

static void chttp2_init_server_secure_fullstack(grpc_end2end_test_fixture *f,
                                                grpc_channel_args *server_args,
                                                grpc_server_credentials *server_creds) {
  fullstack_secure_fixture_data *ffd = (fullstack_secure_fixture_data *)f->fixture_data;
  if (f->server) {
    grpc_server_destroy(f->server);
  }
  f->server = grpc_server_create(server_args, NULL);
  grpc_server_register_completion_queue(f->server, f->cq, NULL);
  GPR_ASSERT(grpc_server_add_secure_http2_port(f->server, ffd->localaddr, server_creds));
  grpc_server_credentials_release(server_creds);
  grpc_server_start(f->server);
}

static void chttp2_tear_down_secure_fullstack(grpc_end2end_test_fixture *f) {
  fullstack_secure_fixture_data *ffd = (fullstack_secure_fixture_data *)f->fixture_data;
  gpr_free(ffd->localaddr);
  gpr_free(ffd);
}

static void cronet_init_client_simple_ssl_secure_fullstack(grpc_end2end_test_fixture *f,
                                                           grpc_channel_args *client_args) {
  grpc_core::ExecCtx exec_ctx;
  stream_engine *cronetEngine = [Cronet getGlobalEngine];

  grpc_channel_args *new_client_args = grpc_channel_args_copy(client_args);
  cronet_init_client_secure_fullstack(f, new_client_args, cronetEngine);
  grpc_channel_args_destroy(new_client_args);
}

static int fail_server_auth_check(grpc_channel_args *server_args) {
  size_t i;
  if (server_args == NULL) return 0;
  for (i = 0; i < server_args->num_args; i++) {
    if (strcmp(server_args->args[i].key, FAIL_AUTH_CHECK_SERVER_ARG_NAME) == 0) {
      return 1;
    }
  }
  return 0;
}

static void chttp2_init_server_simple_ssl_secure_fullstack(grpc_end2end_test_fixture *f,
                                                           grpc_channel_args *server_args) {
  grpc_ssl_pem_key_cert_pair pem_cert_key_pair = {test_server1_key, test_server1_cert};
  grpc_server_credentials *ssl_creds =
      grpc_ssl_server_credentials_create(NULL, &pem_cert_key_pair, 1, 0, NULL);
  if (fail_server_auth_check(server_args)) {
    grpc_auth_metadata_processor processor = {process_auth_failure, NULL, NULL};
    grpc_server_credentials_set_auth_metadata_processor(ssl_creds, processor);
  }
  chttp2_init_server_secure_fullstack(f, server_args, ssl_creds);
}

/* All test configurations */

static grpc_end2end_test_config configs[] = {
    {"chttp2/simple_ssl_fullstack",
     FEATURE_MASK_SUPPORTS_DELAYED_CONNECTION | FEATURE_MASK_SUPPORTS_PER_CALL_CREDENTIALS, nullptr,
     chttp2_create_fixture_secure_fullstack, cronet_init_client_simple_ssl_secure_fullstack,
     chttp2_init_server_simple_ssl_secure_fullstack, chttp2_tear_down_secure_fullstack},
};

static char *roots_filename;

@interface CoreCronetEnd2EndTests : XCTestCase

@end

@implementation CoreCronetEnd2EndTests

// The setUp() function is run before the test cases run and only run once
+ (void)setUp {
  [super setUp];

  FILE *roots_file;
  size_t roots_size = strlen(test_root_cert);

  char *argv[] = {(char *)"CoreCronetEnd2EndTests"};
  grpc_test_init(1, argv);
  grpc_end2end_tests_pre_init();

  /* Set the SSL roots env var. */
  roots_file = gpr_tmpfile("chttp2_simple_ssl_fullstack_test", &roots_filename);
  GPR_ASSERT(roots_filename != NULL);
  GPR_ASSERT(roots_file != NULL);
  GPR_ASSERT(fwrite(test_root_cert, 1, roots_size, roots_file) == roots_size);
  fclose(roots_file);
  gpr_setenv(GRPC_DEFAULT_SSL_ROOTS_FILE_PATH_ENV_VAR, roots_filename);

  grpc_init();

  [Cronet setHttp2Enabled:YES];
  [Cronet enableTestCertVerifierForTesting];
  NSURL *url = [[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory
                                                       inDomains:NSUserDomainMask] lastObject];
  NSLog(@"Documents directory: %@", url);
  [Cronet start];
  [Cronet startNetLogToFile:@"cronet_netlog.json" logBytes:YES];
}

// The tearDown() function is run after all test cases finish running
+ (void)tearDown {
  grpc_shutdown();

  /* Cleanup. */
  remove(roots_filename);
  gpr_free(roots_filename);

  [super tearDown];
}

- (void)testIndividualCase:(char *)test_case {
  char *argv[] = {(char *)"h2_ssl", test_case};

  for (int i = 0; i < sizeof(configs) / sizeof(*configs); i++) {
    grpc_end2end_tests(sizeof(argv) / sizeof(argv[0]), argv, configs[i]);
  }
}

// TODO(mxyan): Use NSStringFromSelector(_cmd) to acquire test name from the
// test case method name, so that bodies of test cases can stay identical
- (void)testAuthorityNotSupported {
  [self testIndividualCase:(char *)"authority_not_supported"];
}

- (void)testBadHostname {
  [self testIndividualCase:(char *)"bad_hostname"];
}

- (void)testBinaryMetadata {
  [self testIndividualCase:(char *)"binary_metadata"];
}

- (void)testCallCreds {
  // NOT SUPPORTED
  // [self testIndividualCase:(char *)"call_creds"];
}

- (void)testCancelAfterAccept {
  [self testIndividualCase:(char *)"cancel_after_accept"];
}

- (void)testCancelAfterClientDone {
  [self testIndividualCase:(char *)"cancel_after_client_done"];
}

- (void)testCancelAfterInvoke {
  [self testIndividualCase:(char *)"cancel_after_invoke"];
}

- (void)testCancelAfterRoundTrip {
  [self testIndividualCase:(char *)"cancel_after_round_trip"];
}

- (void)testCancelBeforeInvoke {
  [self testIndividualCase:(char *)"cancel_before_invoke"];
}

- (void)testCancelInAVacuum {
  [self testIndividualCase:(char *)"cancel_in_a_vacuum"];
}

- (void)testCancelWithStatus {
  [self testIndividualCase:(char *)"cancel_with_status"];
}

- (void)testCompressedPayload {
  [self testIndividualCase:(char *)"compressed_payload"];
}

- (void)testConnectivity {
  // NOT SUPPORTED
  // [self testIndividualCase:(char *)"connectivity"];
}

- (void)testDefaultHost {
  [self testIndividualCase:(char *)"default_host"];
}

- (void)testDisappearingServer {
  [self testIndividualCase:(char *)"disappearing_server"];
}

- (void)testEmptyBatch {
  [self testIndividualCase:(char *)"empty_batch"];
}

- (void)testFilterCausesClose {
  // NOT SUPPORTED
  // [self testIndividualCase:(char *)"filter_causes_close"];
}

- (void)testGracefulServerShutdown {
  [self testIndividualCase:(char *)"graceful_server_shutdown"];
}

- (void)testHighInitialSeqno {
  [self testIndividualCase:(char *)"high_initial_seqno"];
}

- (void)testHpackSize {
  // NOT SUPPORTED
  // [self testIndividualCase:(char *)"hpack_size"];
}

- (void)testIdempotentRequest {
  // NOT SUPPORTED
  // [self testIndividualCase:(char *)"idempotent_request"];
}

- (void)testInvokeLargeRequest {
  // NOT SUPPORTED (frame size)
  // [self testIndividualCase:(char *)"invoke_large_request"];
}

- (void)testLargeMetadata {
  // NOT SUPPORTED
  // [self testIndividualCase:(char *)"large_metadata"];
}

- (void)testMaxConcurrentStreams {
  [self testIndividualCase:(char *)"max_concurrent_streams"];
}

- (void)testMaxMessageLength {
  // NOT SUPPORTED (close_error)
  // [self testIndividualCase:(char *)"max_message_length"];
}

- (void)testNegativeDeadline {
  [self testIndividualCase:(char *)"negative_deadline"];
}

- (void)testNetworkStatusChange {
  [self testIndividualCase:(char *)"network_status_change"];
}

- (void)testNoOp {
  [self testIndividualCase:(char *)"no_op"];
}

- (void)testPayload {
  [self testIndividualCase:(char *)"payload"];
}

- (void)testPing {
  // NOT SUPPORTED
  // [self testIndividualCase:(char *)"ping"];
}

- (void)testPingPongStreaming {
  [self testIndividualCase:(char *)"ping_pong_streaming"];
}

- (void)testRegisteredCall {
  [self testIndividualCase:(char *)"registered_call"];
}

- (void)testRequestWithFlags {
  // NOT SUPPORTED
  // [self testIndividualCase:(char *)"request_with_flags"];
}

- (void)testRequestWithPayload {
  [self testIndividualCase:(char *)"request_with_payload"];
}

- (void)testServerFinishesRequest {
  [self testIndividualCase:(char *)"server_finishes_request"];
}

- (void)testShutdownFinishesCalls {
  [self testIndividualCase:(char *)"shutdown_finishes_calls"];
}

- (void)testShutdownFinishesTags {
  [self testIndividualCase:(char *)"shutdown_finishes_tags"];
}

- (void)testSimpleDelayedRequest {
  [self testIndividualCase:(char *)"simple_delayed_request"];
}

- (void)testSimpleMetadata {
  [self testIndividualCase:(char *)"simple_metadata"];
}

- (void)testSimpleRequest {
  [self testIndividualCase:(char *)"simple_request"];
}

- (void)testStreamingErrorResponse {
  [self testIndividualCase:(char *)"streaming_error_response"];
}

- (void)testTrailingMetadata {
  [self testIndividualCase:(char *)"trailing_metadata"];
}

@end