/*
 *
 * Copyright 2015, Google Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

#include "test/core/end2end/end2end_tests.h"

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

#include <grpc/byte_buffer.h>
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include <grpc/support/time.h>
#include <grpc/support/useful.h>
#include "src/core/transport/stream_op.h"
#include "test/core/end2end/cq_verifier.h"

enum { TIMEOUT = 200000 };

static void *tag(gpr_intptr t) { return (void *)t; }

static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
                                            const char *test_name,
                                            grpc_channel_args *client_args,
                                            grpc_channel_args *server_args) {
  grpc_end2end_test_fixture f;
  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
  f = config.create_fixture(client_args, server_args);
  config.init_client(&f, client_args);
  config.init_server(&f, server_args);
  return f;
}

static gpr_timespec n_seconds_time(int n) {
  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
}

static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }

static void drain_cq(grpc_completion_queue *cq) {
  grpc_event ev;
  do {
    ev = grpc_completion_queue_next(cq, five_seconds_time());
  } while (ev.type != GRPC_QUEUE_SHUTDOWN);
}

static void shutdown_server(grpc_end2end_test_fixture *f) {
  if (!f->server) return;
  grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
  GPR_ASSERT(grpc_completion_queue_pluck(f->cq, tag(1000),
                                         GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5))
                 .type == GRPC_OP_COMPLETE);
  grpc_server_destroy(f->server);
  f->server = NULL;
}

static void shutdown_client(grpc_end2end_test_fixture *f) {
  if (!f->client) return;
  grpc_channel_destroy(f->client);
  f->client = NULL;
}

static void end_test(grpc_end2end_test_fixture *f) {
  shutdown_server(f);
  shutdown_client(f);

  grpc_completion_queue_shutdown(f->cq);
  drain_cq(f->cq);
  grpc_completion_queue_destroy(f->cq);
}

static void test_invoke_request_with_flags(
    grpc_end2end_test_config config, gpr_uint32 *flags_for_op,
    grpc_call_error call_start_batch_expected_result) {
  grpc_call *c;
  gpr_slice request_payload_slice = gpr_slice_from_copied_string("hello world");
  grpc_byte_buffer *request_payload =
      grpc_raw_byte_buffer_create(&request_payload_slice, 1);
  gpr_timespec deadline = GRPC_TIMEOUT_MILLIS_TO_DEADLINE(10);
  grpc_end2end_test_fixture f =
      begin_test(config, "test_invoke_request_with_flags", NULL, NULL);
  cq_verifier *cqv = cq_verifier_create(f.cq);
  grpc_op ops[6];
  grpc_op *op;
  grpc_metadata_array initial_metadata_recv;
  grpc_metadata_array trailing_metadata_recv;
  grpc_metadata_array request_metadata_recv;
  grpc_byte_buffer *request_payload_recv = NULL;
  grpc_call_details call_details;
  grpc_status_code status;
  char *details = NULL;
  size_t details_capacity = 0;
  grpc_call_error expectation;

  c = grpc_channel_create_call(f.client, f.cq, "/foo", "foo.test.google.fr",
                               deadline);
  GPR_ASSERT(c);

  grpc_metadata_array_init(&initial_metadata_recv);
  grpc_metadata_array_init(&trailing_metadata_recv);
  grpc_metadata_array_init(&request_metadata_recv);
  grpc_call_details_init(&call_details);

  op = ops;
  op->op = GRPC_OP_SEND_INITIAL_METADATA;
  op->data.send_initial_metadata.count = 0;
  op->flags = flags_for_op[op->op];
  op++;
  op->op = GRPC_OP_SEND_MESSAGE;
  op->data.send_message = request_payload;
  op->flags = flags_for_op[op->op];
  op++;
  op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
  op->flags = flags_for_op[op->op];
  op++;
  op->op = GRPC_OP_RECV_INITIAL_METADATA;
  op->data.recv_initial_metadata = &initial_metadata_recv;
  op->flags = flags_for_op[op->op];
  op++;
  op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
  op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
  op->data.recv_status_on_client.status = &status;
  op->data.recv_status_on_client.status_details = &details;
  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
  op->flags = flags_for_op[op->op];
  op++;
  expectation = call_start_batch_expected_result;
  GPR_ASSERT(expectation == grpc_call_start_batch(c, ops, op - ops, tag(1)));

  if (expectation == GRPC_CALL_OK) {
    cq_expect_completion(cqv, tag(1), 1);
    cq_verify(cqv);
  }

  gpr_free(details);
  grpc_metadata_array_destroy(&initial_metadata_recv);
  grpc_metadata_array_destroy(&trailing_metadata_recv);
  grpc_metadata_array_destroy(&request_metadata_recv);
  grpc_call_details_destroy(&call_details);

  grpc_call_destroy(c);

  cq_verifier_destroy(cqv);

  grpc_byte_buffer_destroy(request_payload);
  grpc_byte_buffer_destroy(request_payload_recv);

  end_test(&f);
  config.tear_down_data(&f);
}

void grpc_end2end_tests(grpc_end2end_test_config config) {
  size_t i;
  gpr_uint32 flags_for_op[GRPC_OP_RECV_CLOSE_ON_SERVER + 1];

  {
    /* check that all grpc_op_types fail when their flag value is set to an
     * invalid value */
    int indices[] = {GRPC_OP_SEND_INITIAL_METADATA, GRPC_OP_SEND_MESSAGE,
                     GRPC_OP_SEND_CLOSE_FROM_CLIENT,
                     GRPC_OP_RECV_INITIAL_METADATA,
                     GRPC_OP_RECV_STATUS_ON_CLIENT};
    for (i = 0; i < GPR_ARRAY_SIZE(indices); ++i) {
      memset(flags_for_op, 0, sizeof(flags_for_op));
      flags_for_op[indices[i]] = 0xDEADBEEF;
      test_invoke_request_with_flags(config, flags_for_op,
                                     GRPC_CALL_ERROR_INVALID_FLAGS);
    }
  }
  {
    /* check valid operation with allowed flags for GRPC_OP_SEND_BUFFER */
    gpr_uint32 flags[] = {GRPC_WRITE_BUFFER_HINT, GRPC_WRITE_NO_COMPRESS,
                          GRPC_WRITE_INTERNAL_COMPRESS};
    for (i = 0; i < GPR_ARRAY_SIZE(flags); ++i) {
      memset(flags_for_op, 0, sizeof(flags_for_op));
      flags_for_op[GRPC_OP_SEND_MESSAGE] = flags[i];
      test_invoke_request_with_flags(config, flags_for_op, GRPC_CALL_OK);
    }
  }
}