/*
 *
 * 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,
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 * 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.
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 */

#include "src/core/httpcli/parser.h"

#include <stdarg.h>
#include <string.h>

#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include <grpc/support/useful.h>
#include "test/core/util/slice_splitter.h"
#include "test/core/util/test_config.h"

static void
test_succeeds (grpc_slice_split_mode split_mode, char *response, int expect_status, char *expect_body, ...)
{
  grpc_httpcli_parser parser;
  gpr_slice input_slice = gpr_slice_from_copied_string (response);
  size_t num_slices;
  size_t i;
  gpr_slice *slices;
  va_list args;

  grpc_split_slices (split_mode, &input_slice, 1, &slices, &num_slices);
  gpr_slice_unref (input_slice);

  grpc_httpcli_parser_init (&parser);

  for (i = 0; i < num_slices; i++)
    {
      GPR_ASSERT (grpc_httpcli_parser_parse (&parser, slices[i]));
      gpr_slice_unref (slices[i]);
    }
  GPR_ASSERT (grpc_httpcli_parser_eof (&parser));

  GPR_ASSERT (expect_status == parser.r.status);
  if (expect_body != NULL)
    {
      GPR_ASSERT (strlen (expect_body) == parser.r.body_length);
      GPR_ASSERT (0 == memcmp (expect_body, parser.r.body, parser.r.body_length));
    }
  else
    {
      GPR_ASSERT (parser.r.body_length == 0);
    }

  va_start (args, expect_body);
  i = 0;
  for (;;)
    {
      char *expect_key;
      char *expect_value;
      expect_key = va_arg (args, char *);
      if (!expect_key)
	break;
      GPR_ASSERT (i < parser.r.hdr_count);
      expect_value = va_arg (args, char *);
      GPR_ASSERT (expect_value);
      GPR_ASSERT (0 == strcmp (expect_key, parser.r.hdrs[i].key));
      GPR_ASSERT (0 == strcmp (expect_value, parser.r.hdrs[i].value));
      i++;
    }
  va_end (args);
  GPR_ASSERT (i == parser.r.hdr_count);

  grpc_httpcli_parser_destroy (&parser);
  gpr_free (slices);
}

static void
test_fails (grpc_slice_split_mode split_mode, char *response)
{
  grpc_httpcli_parser parser;
  gpr_slice input_slice = gpr_slice_from_copied_string (response);
  size_t num_slices;
  size_t i;
  gpr_slice *slices;
  int done = 0;

  grpc_split_slices (split_mode, &input_slice, 1, &slices, &num_slices);
  gpr_slice_unref (input_slice);

  grpc_httpcli_parser_init (&parser);

  for (i = 0; i < num_slices; i++)
    {
      if (!done && !grpc_httpcli_parser_parse (&parser, slices[i]))
	{
	  done = 1;
	}
      gpr_slice_unref (slices[i]);
    }
  if (!done && !grpc_httpcli_parser_eof (&parser))
    {
      done = 1;
    }
  GPR_ASSERT (done);

  grpc_httpcli_parser_destroy (&parser);
  gpr_free (slices);
}

int
main (int argc, char **argv)
{
  size_t i;
  const grpc_slice_split_mode split_modes[] = { GRPC_SLICE_SPLIT_IDENTITY,
    GRPC_SLICE_SPLIT_ONE_BYTE
  };

  grpc_test_init (argc, argv);

  for (i = 0; i < GPR_ARRAY_SIZE (split_modes); i++)
    {
      test_succeeds (split_modes[i], "HTTP/1.0 200 OK\r\n" "xyz: abc\r\n" "\r\n" "hello world!", 200, "hello world!", "xyz", "abc", NULL);
      test_succeeds (split_modes[i], "HTTP/1.0 404 Not Found\r\n" "\r\n", 404, NULL, NULL);
      test_succeeds (split_modes[i], "HTTP/1.1 200 OK\r\n" "xyz: abc\r\n" "\r\n" "hello world!", 200, "hello world!", "xyz", "abc", NULL);
      test_fails (split_modes[i], "HTTP/1.0\r\n");
      test_fails (split_modes[i], "HTTP/1.2\r\n");
      test_fails (split_modes[i], "HTTP/1.0 000 XYX\r\n");
      test_fails (split_modes[i], "HTTP/1.0 200 OK\n");
      test_fails (split_modes[i], "HTTP/1.0 200 OK\r\n");
      test_fails (split_modes[i], "HTTP/1.0 200 OK\r\nFoo x\r\n");
    }

  return 0;
}