/* This file is part of GLib
 *
 * Copyright (C) 2010  Sven Herzberg
 *
 * This work is provided "as is"; redistribution and modification
 * in whole or in part, in any medium, physical or electronic is
 * permitted without restriction.
 *
 * This work is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * In no event shall the authors 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 <errno.h>  /* errno */
#include <glib.h>
#ifndef _WIN32
#include <unistd.h> /* pipe() */
#else
#include <io.h>
#include <fcntl.h>
#define pipe(fds) _pipe(fds, 4096, _O_BINARY)
#endif

static const char *argv0;

static void
debug (void)
{
  if (g_test_subprocess ())
    g_debug ("this is a regular g_debug() from the test suite");
}

static void
info (void)
{
#ifdef g_info
#error "rewrite this to use g_info()"
#endif
  if (g_test_subprocess ())
    g_log (G_LOG_DOMAIN, G_LOG_LEVEL_INFO, "this is a regular g_log(..., G_LOG_LEVEL_INFO, ...) from the test suite");
}

static void
message (void)
{
  if (g_test_subprocess ())
    g_message ("this is a regular g_message() from the test suite");
}

static void
warning (void)
{
  if (g_test_subprocess ())
    g_warning ("this is a regular g_warning() from the test suite");
}

static void
critical (void)
{
  if (g_test_subprocess ())
    g_critical ("this is a regular g_critical() from the test suite");
}

static void
error (void)
{
  if (g_test_subprocess ())
    g_error ("this is a regular g_error() from the test suite");
}

static void
gtest_message (void)
{
  if (g_test_subprocess ())
    g_test_message ("this is a regular g_test_message() from the test suite");
}

static gboolean
test_message_cb1 (GIOChannel  * channel,
                  GIOCondition  condition,
                  gpointer      user_data)
{
  GIOStatus  status;
  guchar     buf[512];
  gsize      read_bytes = 0;
 
  g_assert_cmpuint (condition, ==, G_IO_IN);

  for (status = g_io_channel_read_chars (channel, (gchar*)buf, sizeof (buf), &read_bytes, NULL);
       status == G_IO_STATUS_NORMAL;
       status = g_io_channel_read_chars (channel, (gchar*)buf, sizeof (buf), &read_bytes, NULL))
    {
      g_test_log_buffer_push (user_data, read_bytes, buf);
    }

  g_assert_cmpuint (status, ==, G_IO_STATUS_AGAIN);

  return TRUE;
}

static void
test_message_cb2 (GPid      pid,
                  gint      status,
                  gpointer  user_data)
{
  g_spawn_close_pid (pid);

  g_main_loop_quit (user_data);
}

static void
test_message (void)
{
  gchar* argv[] = {
          argv0,
          NULL,
          "--GTestSubprocess",
          "-p", "/glib/testing/protocol/debug",
          "-p", "/glib/testing/protocol/message",
          "-p", "/glib/testing/protocol/gtest-message",
          NULL
  };
  GTestLogBuffer* tlb;
  GTestLogMsg   * msg;
  GIOChannel    * channel;
  GMainLoop     * loop;
  GError        * error = NULL;
  gulong          child_source;
  gulong          io_source;
  GPid            pid = 0;
  int             pipes[2];
  int             passed = 0;
  int             messages = 0;
  const char    * line_term;
  int             line_term_len;

  if (0 > pipe (pipes))
    {
      g_error ("error creating pipe: %s", g_strerror (errno));
    }

  argv[1] = g_strdup_printf ("--GTestLogFD=%u", pipes[1]);

  if (!g_spawn_async (NULL,
                      argv, NULL,
                      G_SPAWN_DO_NOT_REAP_CHILD | G_SPAWN_LEAVE_DESCRIPTORS_OPEN |
                      G_SPAWN_STDOUT_TO_DEV_NULL | G_SPAWN_STDERR_TO_DEV_NULL,
                      NULL, NULL, &pid,
                      &error))
    {
      g_error ("error spawning the test: %s", error->message);
    }

  tlb = g_test_log_buffer_new ();
  loop = g_main_loop_new (NULL, FALSE);

  channel = g_io_channel_unix_new (pipes[0]);
  g_io_channel_set_close_on_unref (channel, TRUE);
  g_io_channel_set_encoding (channel, NULL, NULL);
  g_io_channel_set_buffered (channel, FALSE);
  g_io_channel_set_flags (channel, G_IO_FLAG_NONBLOCK, NULL);
  g_assert (g_io_channel_get_line_term (channel, NULL) == NULL);
  g_io_channel_set_line_term (channel, "\n", 1);
  line_term = g_io_channel_get_line_term (channel, &line_term_len);
  g_assert_cmpint (*line_term, ==, '\n');
  g_assert_cmpint (line_term_len, ==, 1);

  io_source = g_io_add_watch (channel, G_IO_IN, test_message_cb1, tlb);
  child_source = g_child_watch_add (pid, test_message_cb2, loop);

  g_main_loop_run (loop);

  test_message_cb1 (channel, G_IO_IN, tlb);

  g_assert (!g_source_remove (child_source));
  g_assert (g_source_remove (io_source));
  g_io_channel_unref (channel);

  for (msg = g_test_log_buffer_pop (tlb);
       msg;
       msg = g_test_log_buffer_pop (tlb))
    {
      switch (msg->log_type)
        {
        case G_TEST_LOG_START_BINARY:
        case G_TEST_LOG_START_CASE:
          /* ignore */
          break;
        case G_TEST_LOG_STOP_CASE:
          passed++;
          break;
        case G_TEST_LOG_MESSAGE:
          {
            gchar const* known_messages[] = {
                    "this is a regular g_test_message() from the test suite",
                    "GLib-MESSAGE: this is a regular g_message() from the test suite",
                    "GLib-DEBUG: this is a regular g_debug() from the test suite"
            };
            g_assert_cmpint (messages, <, G_N_ELEMENTS (known_messages));
            g_assert_cmpstr (msg->strings[0], ==, known_messages[messages]);
            messages++;
          }
          break;
        case G_TEST_LOG_ERROR:
          g_assert_not_reached ();
          break;
        default:
          g_error ("unexpected log message type: %s", g_test_log_type_name (msg->log_type));
        }
       g_test_log_msg_free (msg);
    }

  g_assert_cmpint (passed, ==, 3);
  g_assert_cmpint (messages, ==, 3);

  g_free (argv[1]);
  g_main_loop_unref (loop);
  g_test_log_buffer_free (tlb);
}

static void
test_error (void)
{
  gchar* tests[] = {
          "/glib/testing/protocol/warning",
          "/glib/testing/protocol/critical",
          "/glib/testing/protocol/error"
  };
  gint i;
  int             messages = 0;

  for (i = 0; i < G_N_ELEMENTS (tests); i++)
    {
      gchar* argv[] = {
              argv0,
              NULL,
              "--GTestSubprocess",
              "-p", tests[i],
              NULL
      };
      GTestLogBuffer* tlb;
      GTestLogMsg   * msg;
      GIOChannel    * channel;
      GMainLoop     * loop;
      GError        * error = NULL;
      gulong          child_source;
      gulong          io_source;
      GPid            pid = 0;
      int             pipes[2];

      if (0 > pipe (pipes))
        {
          g_error ("error creating pipe: %s", g_strerror (errno));
        }

      argv[1] = g_strdup_printf ("--GTestLogFD=%u", pipes[1]);

      if (!g_spawn_async (NULL,
                          argv, NULL,
                          G_SPAWN_DO_NOT_REAP_CHILD | G_SPAWN_LEAVE_DESCRIPTORS_OPEN |
                          G_SPAWN_STDOUT_TO_DEV_NULL | G_SPAWN_STDERR_TO_DEV_NULL,
                          NULL, NULL, &pid,
                          &error))
        {
          g_error ("error spawning the test: %s", error->message);
        }

      tlb = g_test_log_buffer_new ();
      loop = g_main_loop_new (NULL, FALSE);

      channel = g_io_channel_unix_new (pipes[0]);
      g_io_channel_set_close_on_unref (channel, TRUE);
      g_io_channel_set_encoding (channel, NULL, NULL);
      g_io_channel_set_buffered (channel, FALSE);
      g_io_channel_set_flags (channel, G_IO_FLAG_NONBLOCK, NULL);

      io_source = g_io_add_watch (channel, G_IO_IN, test_message_cb1, tlb);
      child_source = g_child_watch_add (pid, test_message_cb2, loop);

      g_main_loop_run (loop);

      test_message_cb1 (channel, G_IO_IN, tlb);

      g_assert (!g_source_remove (child_source));
      g_assert (g_source_remove (io_source));
      g_io_channel_unref (channel);

      for (msg = g_test_log_buffer_pop (tlb);
           msg;
           msg = g_test_log_buffer_pop (tlb))
        {
          switch (msg->log_type)
            {
            case G_TEST_LOG_START_BINARY:
            case G_TEST_LOG_START_CASE:
              /* ignore */
              break;
            case G_TEST_LOG_STOP_CASE:
            case G_TEST_LOG_MESSAGE:
              g_assert_not_reached ();
              break;
            case G_TEST_LOG_ERROR:
                {
                  gchar const* known_messages[] = {
                          "GLib-FATAL-WARNING: this is a regular g_warning() from the test suite",
                          "GLib-FATAL-CRITICAL: this is a regular g_critical() from the test suite",
                          "GLib-FATAL-ERROR: this is a regular g_error() from the test suite"
                  };
                  g_assert_cmpint (messages, <, G_N_ELEMENTS (known_messages));
                  g_assert_cmpstr (msg->strings[0], ==, known_messages[messages]);
                  messages++;
                }
              break;
            default:
              g_error ("unexpected log message type: %s", g_test_log_type_name (msg->log_type));
            }
            g_test_log_msg_free (msg);
        }

      g_free (argv[1]);
      g_main_loop_unref (loop);
      g_test_log_buffer_free (tlb);
    }

  g_assert_cmpint (messages, ==, 3);
}

int
main (int   argc,
      char**argv)
{
  argv0 = argv[0];

  g_test_init (&argc, &argv, NULL);

  /* we use ourself as the testcase, these are the ones we need internally */
  g_test_add_func ("/glib/testing/protocol/debug", debug);
  g_test_add_func ("/glib/testing/protocol/info", info);
  g_test_add_func ("/glib/testing/protocol/message", message);
  g_test_add_func ("/glib/testing/protocol/warning", warning);
  g_test_add_func ("/glib/testing/protocol/critical", critical);
  g_test_add_func ("/glib/testing/protocol/error", error);
  g_test_add_func ("/glib/testing/protocol/gtest-message", gtest_message);

  /* these are the real tests */
  g_test_add_func ("/glib/testing/protocol/test-message", test_message);
  g_test_add_func ("/glib/testing/protocol/test-error", test_error);

  return g_test_run ();
}

/* vim:set et sw=2 cino=t0,f0,(0,{s,>2s,n-1s,^-1s,e2s: */
