/* test-federated-core.c
 *
 * Copyright (C) 2026 David Young <david@federated.computer>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <glib.h>
#include <glib/gstdio.h>

#include "gcal-federated-core.h"

/*
 * Written by CoreDesktop's configure with bash's printf %q
 */
#define CORE_CONF(domain, email, name) \
  "CORE_DOMAIN=" domain "\n"           \
  "CORE_EMAIL=" email "\n"             \
  "CORE_NAME=" name "\n"

static gchar *
create_config_dir (void)
{
  g_autoptr (GError) error = NULL;
  gchar *config_dir;

  config_dir = g_dir_make_tmp ("gcal-federated-core-XXXXXX", &error);
  g_assert_no_error (error);

  return config_dir;
}

static void
write_file (const gchar *config_dir,
            const gchar *filename,
            const gchar *contents)
{
  g_autoptr (GError) error = NULL;
  g_autofree gchar *path = g_build_filename (config_dir, filename, NULL);
  g_autofree gchar *dir = g_path_get_dirname (path);

  g_mkdir_with_parents (dir, 0700);
  g_file_set_contents (path, contents, -1, &error);
  g_assert_no_error (error);
}

static void
remove_config_dir (const gchar *config_dir)
{
  g_autoptr (GFile) dir = g_file_new_for_path (config_dir);
  g_autoptr (GFileEnumerator) children = NULL;
  GFileInfo *info;
  GFile *child;

  children = g_file_enumerate_children (dir, G_FILE_ATTRIBUTE_STANDARD_NAME, G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS, NULL, NULL);

  while (children && g_file_enumerator_iterate (children, &info, &child, NULL, NULL) && info)
    {
      if (g_file_info_get_file_type (info) == G_FILE_TYPE_DIRECTORY)
        {
          g_autofree gchar *path = g_file_get_path (child);
          remove_config_dir (path);
        }
      else
        {
          g_file_delete (child, NULL, NULL);
        }
    }

  g_file_delete (dir, NULL, NULL);
}

/*********************************************************************************************************************/

static void
federated_core_find_core (void)
{
  g_autofree gchar *config_dir = create_config_dir ();
  g_autofree gchar *email = NULL;
  g_autofree gchar *name = NULL;

  /* Nothing set up */
  g_assert_false (gcal_federated_core_find_core (config_dir, "nextcloud.example.com", NULL, NULL));

  write_file (config_dir, "cores/example.com.conf", CORE_CONF ("example.com", "ana@example.com", "Ana\\ Lima"));
  write_file (config_dir, "cores/example.org.conf", CORE_CONF ("example.org", "bo@example.org", "Bo"));

  g_assert_true (gcal_federated_core_find_core (config_dir, "nextcloud.example.com", &email, &name));
  g_assert_cmpstr (email, ==, "ana@example.com");
  g_assert_cmpstr (name, ==, "Ana Lima");

  g_clear_pointer (&email, g_free);
  g_clear_pointer (&name, g_free);

  g_assert_true (gcal_federated_core_find_core (config_dir, "NextCloud.Example.Org", &email, &name));
  g_assert_cmpstr (email, ==, "bo@example.org");
  g_assert_cmpstr (name, ==, "Bo");

  /* Only the Core's own Nextcloud */
  g_assert_false (gcal_federated_core_find_core (config_dir, "example.com", NULL, NULL));
  g_assert_false (gcal_federated_core_find_core (config_dir, "caldav.example.com", NULL, NULL));
  g_assert_false (gcal_federated_core_find_core (config_dir, "nextcloud.example.com.evil.net", NULL, NULL));
  g_assert_false (gcal_federated_core_find_core (config_dir, NULL, NULL, NULL));

  remove_config_dir (config_dir);
}

static void
federated_core_single_core_conf (void)
{
  g_autofree gchar *config_dir = create_config_dir ();
  g_autofree gchar *email = NULL;
  g_autofree gchar *name = NULL;

  /* Before CoreDesktop supported several Cores */
  write_file (config_dir, "core.conf", CORE_CONF ("example.com", "ana@example.com", "\\'Ana\\'"));

  g_assert_true (gcal_federated_core_find_core (config_dir, "nextcloud.example.com", &email, &name));
  g_assert_cmpstr (email, ==, "ana@example.com");
  g_assert_cmpstr (name, ==, "'Ana'");

  remove_config_dir (config_dir);
}

static void
federated_core_incomplete_conf (void)
{
  g_autofree gchar *config_dir = create_config_dir ();

  write_file (config_dir, "cores/example.com.conf", "CORE_DOMAIN=example.com\n");
  write_file (config_dir, "cores/example.org.conf", CORE_CONF ("example.org", "not-an-email", "Bo"));
  write_file (config_dir, "cores/example.net.conf.bak", CORE_CONF ("example.net", "cy@example.net", "Cy"));

  g_assert_false (gcal_federated_core_find_core (config_dir, "nextcloud.example.com", NULL, NULL));
  g_assert_false (gcal_federated_core_find_core (config_dir, "nextcloud.example.org", NULL, NULL));
  g_assert_false (gcal_federated_core_find_core (config_dir, "nextcloud.example.net", NULL, NULL));

  remove_config_dir (config_dir);
}

/*********************************************************************************************************************/

gint
main (gint   argc,
      gchar *argv[])
{
  g_test_init (&argc, &argv, NULL);

  g_test_add_func ("/federated-core/find-core", federated_core_find_core);
  g_test_add_func ("/federated-core/single-core-conf", federated_core_single_core_conf);
  g_test_add_func ("/federated-core/incomplete-conf", federated_core_incomplete_conf);

  return g_test_run ();
}