/*
 *
 * 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/bad_client/bad_client.h"

#include "src/core/channel/channel_stack.h"
#include "src/core/channel/http_server_filter.h"
#include "src/core/iomgr/endpoint_pair.h"
#include "src/core/surface/completion_queue.h"
#include "src/core/surface/server.h"
#include "src/core/support/string.h"
#include "src/core/transport/chttp2_transport.h"

#include <grpc/support/alloc.h>
#include <grpc/support/sync.h>
#include <grpc/support/thd.h>

typedef struct
{
  grpc_server *server;
  grpc_completion_queue *cq;
  grpc_bad_client_server_side_validator validator;
  gpr_event done_thd;
  gpr_event done_write;
} thd_args;

static void
thd_func (void *arg)
{
  thd_args *a = arg;
  a->validator (a->server, a->cq);
  gpr_event_set (&a->done_thd, (void *) 1);
}

static void
done_write (grpc_exec_ctx * exec_ctx, void *arg, int success)
{
  thd_args *a = arg;
  gpr_event_set (&a->done_write, (void *) 1);
}

static void
server_setup_transport (void *ts, grpc_transport * transport, grpc_mdctx * mdctx)
{
  thd_args *a = ts;
  static grpc_channel_filter const *extra_filters[] = {
    &grpc_http_server_filter
  };
  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
  grpc_server_setup_transport (a->server, transport, extra_filters, GPR_ARRAY_SIZE (extra_filters), mdctx, grpc_server_get_channel_args (a->server), &closure_list);
  grpc_exec_ctx_finish (&exec_ctx);
}

void
grpc_run_bad_client_test (grpc_bad_client_server_side_validator validator, const char *client_payload, size_t client_payload_length, gpr_uint32 flags)
{
  grpc_endpoint_pair sfd;
  thd_args a;
  gpr_thd_id id;
  char *hex;
  grpc_transport *transport;
  grpc_mdctx *mdctx = grpc_mdctx_create ();
  gpr_slice slice = gpr_slice_from_copied_buffer (client_payload, client_payload_length);
  gpr_slice_buffer outgoing;
  grpc_closure done_write_closure;
  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;

  hex = gpr_dump (client_payload, client_payload_length, GPR_DUMP_HEX | GPR_DUMP_ASCII);

  /* Add a debug log */
  gpr_log (GPR_INFO, "TEST: %s", hex);

  gpr_free (hex);

  /* Init grpc */
  grpc_init ();

  /* Create endpoints */
  sfd = grpc_iomgr_create_endpoint_pair ("fixture", 65536);

  /* Create server, completion events */
  a.server = grpc_server_create_from_filters (NULL, 0, NULL);
  a.cq = grpc_completion_queue_create (NULL);
  gpr_event_init (&a.done_thd);
  gpr_event_init (&a.done_write);
  a.validator = validator;
  grpc_server_register_completion_queue (a.server, a.cq, NULL);
  grpc_server_start (a.server);
  transport = grpc_create_chttp2_transport (NULL, sfd.server, mdctx, 0, &closure_list);
  server_setup_transport (&a, transport, mdctx);
  grpc_chttp2_transport_start_reading (transport, NULL, 0, &closure_list);
  grpc_exec_ctx_finish (&exec_ctx);

  /* Bind everything into the same pollset */
  grpc_endpoint_add_to_pollset (sfd.client, grpc_cq_pollset (a.cq), &closure_list);
  grpc_endpoint_add_to_pollset (sfd.server, grpc_cq_pollset (a.cq), &closure_list);

  /* Check a ground truth */
  GPR_ASSERT (grpc_server_has_open_connections (a.server));

  /* Start validator */
  gpr_thd_new (&id, thd_func, &a, NULL);

  gpr_slice_buffer_init (&outgoing);
  gpr_slice_buffer_add (&outgoing, slice);
  grpc_closure_init (&done_write_closure, done_write, &a);

  /* Write data */
  grpc_endpoint_write (sfd.client, &outgoing, &done_write_closure, &closure_list);
  grpc_exec_ctx_finish (&exec_ctx);

  /* Await completion */
  GPR_ASSERT (gpr_event_wait (&a.done_write, GRPC_TIMEOUT_SECONDS_TO_DEADLINE (5)));

  if (flags & GRPC_BAD_CLIENT_DISCONNECT)
    {
      grpc_endpoint_shutdown (sfd.client, &closure_list);
      grpc_endpoint_destroy (sfd.client, &closure_list);
      grpc_exec_ctx_finish (&exec_ctx);
      sfd.client = NULL;
    }

  GPR_ASSERT (gpr_event_wait (&a.done_thd, GRPC_TIMEOUT_SECONDS_TO_DEADLINE (5)));

  /* Shutdown */
  if (sfd.client)
    {
      grpc_endpoint_shutdown (sfd.client, &closure_list);
      grpc_endpoint_destroy (sfd.client, &closure_list);
      grpc_exec_ctx_finish (&exec_ctx);
    }
  grpc_server_shutdown_and_notify (a.server, a.cq, NULL);
  GPR_ASSERT (grpc_completion_queue_pluck (a.cq, NULL, GRPC_TIMEOUT_SECONDS_TO_DEADLINE (1), NULL).type == GRPC_OP_COMPLETE);
  grpc_server_destroy (a.server);
  grpc_completion_queue_destroy (a.cq);
  gpr_slice_buffer_destroy (&outgoing);

  grpc_exec_ctx_finish (&exec_ctx);
  grpc_shutdown ();
}