/*
 * Copyright © 2014 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"
#include "flatpak-table-printer.h"

static gboolean opt_show_details;
static gboolean opt_runtime;
static gboolean opt_app;
static gboolean opt_only_updates;
static char *opt_arch;

static GOptionEntry options[] = {
  { "show-details", 'd', 0, G_OPTION_ARG_NONE, &opt_show_details, N_("Show arches and branches"), NULL },
  { "runtime", 0, 0, G_OPTION_ARG_NONE, &opt_runtime, N_("Show only runtimes"), NULL },
  { "app", 0, 0, G_OPTION_ARG_NONE, &opt_app, N_("Show only apps"), NULL },
  { "updates", 0, 0, G_OPTION_ARG_NONE, &opt_only_updates, N_("Show only those where updates are available"), NULL },
  { "arch", 0, 0, G_OPTION_ARG_STRING, &opt_arch, N_("Limit to this arch (* for all)"), N_("ARCH") },
  { NULL }
};

gboolean
flatpak_builtin_ls_remote (int argc, char **argv, GCancellable *cancellable, GError **error)
{
  g_autoptr(GOptionContext) context = NULL;
  g_autoptr(FlatpakDir) dir = NULL;
  g_autoptr(GHashTable) refs = NULL;
  GHashTableIter iter;
  gpointer key;
  gpointer value;
  g_autoptr(GHashTable) names = NULL;
  guint n_keys;
  g_autofree const char **keys = NULL;
  int i;
  const char *repository;
  const char **arches = flatpak_get_arches ();
  const char *opt_arches[] = {NULL, NULL};
  g_autoptr(GVariant) refdata = NULL;

  context = g_option_context_new (_(" REMOTE - Show available runtimes and applications"));
  g_option_context_set_translation_domain (context, GETTEXT_PACKAGE);

  if (!flatpak_option_context_parse (context, options, &argc, &argv, 0, &dir, cancellable, error))
    return FALSE;

  if (!opt_app && !opt_runtime)
    opt_app = opt_runtime = TRUE;

  if (argc < 2)
    return usage_error (context, _("REMOTE must be specified"), error);

  if (argc > 2)
    return usage_error (context, _("Too many arguments"), error);

  repository = argv[1];


  if (!flatpak_dir_list_remote_refs (dir,
                                     repository,
                                     &refs,
                                     cancellable, error))
    return FALSE;

  names = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);

  if (opt_show_details)
    {
      g_autoptr(GVariant) summary = NULL;
      g_autoptr(GVariant) meta = NULL;
      g_autoptr(GVariant) cache = NULL;

      summary = flatpak_dir_fetch_remote_summary (dir, repository, cancellable, error);
      if (summary == NULL)
        return FALSE;
      meta = g_variant_get_child_value (summary, 1);
      cache = g_variant_lookup_value (meta, "xa.cache", NULL);
      refdata = g_variant_get_variant (cache);
    }

  if (opt_arch != NULL)
    {
      if (strcmp (opt_arch, "*") == 0)
        arches = NULL;
      else
        {
          opt_arches[0] = opt_arch;
          arches = opt_arches;
        }
    }

  g_hash_table_iter_init (&iter, refs);
  while (g_hash_table_iter_next (&iter, &key, &value))
    {
      const char *ref = key;
      const char *checksum = value;
      const char *name = NULL;
      g_auto(GStrv) parts = NULL;

      parts = flatpak_decompose_ref (ref, NULL);
      if (parts == NULL)
        {
          g_debug ("Invalid remote ref %s\n", ref);
          continue;
        }

      if (opt_only_updates)
        {
          g_autoptr(GVariant) deploy_data = flatpak_dir_get_deploy_data (dir, ref, cancellable, NULL);

          if (deploy_data == NULL)
            continue;

          if (g_strcmp0 (flatpak_deploy_data_get_commit (deploy_data), checksum) == 0)
            continue;
        }

      if (arches != NULL && !g_strv_contains (arches, parts[2]))
        continue;

      if (strcmp (parts[0], "runtime") == 0 && !opt_runtime)
        continue;

      if (strcmp (parts[0], "app") == 0 && !opt_app)
        continue;

      if (!opt_show_details)
        name = parts[1];
      else
        name = ref;

      if (g_hash_table_lookup (names, name) == NULL)
        g_hash_table_insert (names, g_strdup (name), g_strdup (checksum));
    }

  keys = (const char **) g_hash_table_get_keys_as_array (names, &n_keys);
  g_qsort_with_data (keys, n_keys, sizeof (char *), (GCompareDataFunc) flatpak_strcmp0_ptr, NULL);

  FlatpakTablePrinter *printer = flatpak_table_printer_new ();

  flatpak_table_printer_set_column_title (printer, 0, _("Ref"));
  flatpak_table_printer_set_column_title (printer, 1, _("Commit"));
  flatpak_table_printer_set_column_title (printer, 2, _("Installed size"));
  flatpak_table_printer_set_column_title (printer, 3, _("Download size"));

  for (i = 0; i < n_keys; i++)
    {
      flatpak_table_printer_add_column (printer, keys[i]);
      if (opt_show_details)
        {
          g_autofree char *value = NULL;
          guint64 installed_size;
          guint64 download_size;
          const char *metadata;

          value = g_strdup ((char *) g_hash_table_lookup (names, keys[i]));
          value[MIN (strlen (value), 12)] = 0;
          flatpak_table_printer_add_column (printer, value);

          if (g_variant_lookup (refdata, keys[i], "(tt&s)", &installed_size, &download_size, &metadata))
            {
              g_autofree char *installed = g_format_size (GUINT64_FROM_BE (installed_size));
              g_autofree char *download = g_format_size (GUINT64_FROM_BE (download_size));

              flatpak_table_printer_add_decimal_column (printer, installed);
              flatpak_table_printer_add_decimal_column (printer, download);
            }
        }
      flatpak_table_printer_finish_row (printer);
    }

  flatpak_table_printer_print (printer);
  flatpak_table_printer_free (printer);

  return TRUE;
}

gboolean
flatpak_complete_ls_remote (FlatpakCompletion *completion)
{
  g_autoptr(GOptionContext) context = NULL;
  g_autoptr(FlatpakDir) dir = NULL;
  int i;

  context = g_option_context_new ("");

  if (!flatpak_option_context_parse (context, options, &completion->argc, &completion->argv, 0, &dir, NULL, NULL))
    return FALSE;

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

      {
        g_auto(GStrv) remotes = flatpak_dir_list_remotes (dir, NULL, NULL);
        if (remotes == NULL)
          return FALSE;
        for (i = 0; remotes[i] != NULL; i++)
          flatpak_complete_word (completion, "%s ", remotes[i]);
      }

      break;
    }

  return TRUE;
}
