/*
 * Copyright © 2016 Red Hat, Inc
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library. If not, see <http://www.gnu.org/licenses/>.
 *
 * Authors:
 *       Alexander Larsson <alexl@redhat.com>
 */

#include "config.h"

#include <locale.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>

#include <glib/gi18n.h>

#include "libglnx/libglnx.h"

#include "flatpak-builtins.h"
#include "flatpak-utils.h"

static gboolean opt_user;
static gboolean opt_system;
static gboolean opt_runtime;
static gboolean opt_app;
static gboolean opt_show_ref;
static gboolean opt_show_commit;
static gboolean opt_show_origin;
static char *opt_arch;

static GOptionEntry options[] = {
  { "arch", 0, 0, G_OPTION_ARG_STRING, &opt_arch, N_("Arch to use"), N_("ARCH") },
  { "user", 0, 0, G_OPTION_ARG_NONE, &opt_user, N_("Show user installations"), NULL },
  { "system", 0, 0, G_OPTION_ARG_NONE, &opt_system, N_("Show system-wide installations"), NULL },
  { "runtime", 0, 0, G_OPTION_ARG_NONE, &opt_runtime, N_("List installed runtimes"), NULL },
  { "app", 0, 0, G_OPTION_ARG_NONE, &opt_app, N_("List installed applications"), NULL },
  { "show-ref", 'r', 0, G_OPTION_ARG_NONE, &opt_show_ref, N_("Show ref"), NULL },
  { "show-commit", 'c', 0, G_OPTION_ARG_NONE, &opt_show_commit, N_("Show commit"), NULL },
  { "show-origin", 'o', 0, G_OPTION_ARG_NONE, &opt_show_origin, N_("Show origin"), NULL },
  { NULL }
};

/* Print space unless this is the first item */
static void
maybe_print_space (gboolean *first)
{
  if (*first)
    *first = FALSE;
  else
    g_print (" ");
}

gboolean
flatpak_builtin_info (int argc, char **argv, GCancellable *cancellable, GError **error)
{
  g_autoptr(GOptionContext) context = NULL;
  g_autofree char *ref = NULL;
  g_autoptr(FlatpakDir) user_dir = NULL;
  g_autoptr(FlatpakDir) system_dir = NULL;
  FlatpakDir *dir = NULL;
  g_autoptr(GError) lookup_error = NULL;
  g_autoptr(GVariant) deploy_data = NULL;
  const char *commit = NULL;
  const char *pref = NULL;
  const char *default_branch = NULL;
  const char *origin = NULL;
  gboolean first = TRUE;
  FlatpakKinds kinds;
  FlatpakKinds kind = 0;
  g_autofree char *id = NULL;
  g_autofree char *arch = NULL;
  g_autofree char *branch = NULL;

  context = g_option_context_new (_("NAME [BRANCH] - Get info about installed app and/or runtime"));
  g_option_context_set_translation_domain (context, GETTEXT_PACKAGE);

  if (!flatpak_option_context_parse (context, options, &argc, &argv, FLATPAK_BUILTIN_FLAG_NO_DIR, NULL, cancellable, error))
    return FALSE;

  if (argc < 2)
    return usage_error (context, _("NAME must be specified"), error);
  pref = argv[1];

  if (argc >= 3)
    default_branch = argv[2];

  if (argc > 3)
    return usage_error (context, _("Too many arguments"), error);

  kinds = flatpak_kinds_from_bools (opt_app, opt_runtime);

  if (!flatpak_split_partial_ref_arg (pref, kinds, opt_arch, default_branch,
                                      &kinds, &id, &arch, &branch, error))
    return FALSE;

  if (!opt_user && !opt_system)
    opt_user = opt_system = TRUE;

  if (opt_user)
    {
      user_dir = flatpak_dir_get_user ();

      ref = flatpak_dir_find_installed_ref (user_dir,
                                            id,
                                            branch,
                                            arch,
                                            kinds, &kind,
                                            &lookup_error);
      if (ref)
        dir = user_dir;
    }

  if (ref == NULL && opt_system)
    {
      system_dir = flatpak_dir_get_system_default ();

      ref = flatpak_dir_find_installed_ref (system_dir,
                                            id,
                                            branch,
                                            arch,
                                            kinds, &kind,
                                            lookup_error == NULL ? &lookup_error : NULL);
      if (ref)
        dir = system_dir;
    }

  if (ref == NULL)
    {
      g_propagate_error (error, g_steal_pointer (&lookup_error));
      return FALSE;
    }

  deploy_data = flatpak_dir_get_deploy_data (dir, ref, cancellable, error);
  if (deploy_data == NULL)
    return FALSE;

  commit = flatpak_deploy_data_get_commit (deploy_data);
  origin = flatpak_deploy_data_get_origin (deploy_data);

  if (!opt_show_ref && !opt_show_origin && !opt_show_commit)
    opt_show_ref = opt_show_origin = opt_show_commit = TRUE;

  if (opt_show_ref)
    {
      maybe_print_space (&first);

      g_print ("%s", ref);
    }

  if (opt_show_origin)
    {
      maybe_print_space (&first);

      g_print ("%s", origin ? origin : "-");
    }

  if (opt_show_commit)
    {
      maybe_print_space (&first);

      g_print ("%s", commit);
    }

  g_print ("\n");

  return TRUE;
}

gboolean
flatpak_complete_info (FlatpakCompletion *completion)
{
  g_autoptr(GOptionContext) context = NULL;
  g_autoptr(FlatpakDir) user_dir = NULL;
  g_autoptr(FlatpakDir) system_dir = NULL;
  g_autoptr(GError) error = NULL;
  FlatpakKinds kinds;
  int i;

  context = g_option_context_new ("");
  if (!flatpak_option_context_parse (context, options, &completion->argc, &completion->argv, FLATPAK_BUILTIN_FLAG_NO_DIR, NULL, NULL, NULL))
    return FALSE;

  kinds = flatpak_kinds_from_bools (opt_app, opt_runtime);

  if (!opt_user && !opt_system)
    opt_user = opt_system = TRUE;

  if (opt_user)
    user_dir = flatpak_dir_get_user ();

  if (opt_system)
    system_dir = flatpak_dir_get_system_default ();

  switch (completion->argc)
    {
    case 0:
    case 1: /* NAME */
      flatpak_complete_options (completion, global_entries);
      flatpak_complete_options (completion, options);

      if (user_dir)
        {
          g_auto(GStrv) refs = flatpak_dir_find_installed_refs (user_dir, NULL, NULL, opt_arch,
                                                                kinds, &error);
          if (refs == NULL)
            flatpak_completion_debug ("find local refs error: %s", error->message);
          for (i = 0; refs != NULL && refs[i] != NULL; i++)
            {
              g_auto(GStrv) parts = flatpak_decompose_ref (refs[i], NULL);
              if (parts)
                flatpak_complete_word (completion, "%s ", parts[1]);
            }
        }

      if (system_dir)
        {
          g_auto(GStrv) refs = flatpak_dir_find_installed_refs (system_dir, NULL, NULL, opt_arch,
                                                                kinds, &error);
          if (refs == NULL)
            flatpak_completion_debug ("find local refs error: %s", error->message);
          for (i = 0; refs != NULL && refs[i] != NULL; i++)
            {
              g_auto(GStrv) parts = flatpak_decompose_ref (refs[i], NULL);
              if (parts)
                flatpak_complete_word (completion, "%s ", parts[1]);
            }
        }
      break;

    case 2: /* BRANCH */
      if (user_dir)
        {
          g_auto(GStrv) refs = flatpak_dir_find_installed_refs (user_dir, completion->argv[1], NULL, opt_arch,
                                                                kinds, &error);
          if (refs == NULL)
            flatpak_completion_debug ("find remote refs error: %s", error->message);
          for (i = 0; refs != NULL && refs[i] != NULL; i++)
            {
              g_auto(GStrv) parts = flatpak_decompose_ref (refs[i], NULL);
              if (parts)
                flatpak_complete_word (completion, "%s ", parts[3]);
            }
        }
      if (system_dir)
        {
          g_auto(GStrv) refs = flatpak_dir_find_installed_refs (system_dir, completion->argv[1], NULL, opt_arch,
                                                                kinds, &error);
          if (refs == NULL)
            flatpak_completion_debug ("find remote refs error: %s", error->message);
          for (i = 0; refs != NULL && refs[i] != NULL; i++)
            {
              g_auto(GStrv) parts = flatpak_decompose_ref (refs[i], NULL);
              if (parts)
                flatpak_complete_word (completion, "%s ", parts[3]);
            }
        }

      break;

    default:
      break;
    }

  return TRUE;
}