/* convert-emoji.c: A tool to create an Emoji data GVariant
 * Copyright 2017, Red Hat, Inc.
 *
 * This library 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 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/>.
 */

/* Build with gcc -o convert-emoji convert-emoji.c `pkg-config --cflags --libs json-glib-1.0`
 */

/* Reads data from the json files in emojibase, expecting
 * language-specific data.raw.json as input
 */

/* The format of the generated data is: a(ausasu).
 * Each member of the array has the following fields:
 * au - sequence of unicode codepoints. If the
 *      sequence contains a 0, it marks the point
 *      where skin tone modifiers should be inserted
 * s  - name, e.g. "man worker"
 * as - keywords, e.g. "man", "worker"
 * u  - the group that this item belongs to:
 *      0: smileys-emotion
 *      1: people-body
 *      2: component
 *      3: animals-nature
 *      4: food-drink
 *      5: travel-places
 *      6: activities
 *      7: objects
 *      8: symbols
 *      9: flags
 */
#include <json-glib/json-glib.h>
#include <string.h>

gboolean
parse_code (GVariantBuilder *b,
            const char      *code)
{
  g_auto(GStrv) strv = NULL;
  int j;

  strv = g_strsplit (code, "-", -1);
  for (j = 0; strv[j]; j++)
    {
      guint32 u;
      char *end;

      u = (guint32) g_ascii_strtoull (strv[j], &end, 16);
      if (*end != '\0')
        {
          g_error ("failed to parse code: %s\n", strv[j]);
          return FALSE;
        }
      if (0x1f3fb <= u && u <= 0x1f3ff)
        g_variant_builder_add (b, "u", 0);
      else
        g_variant_builder_add (b, "u", u);
    }

  return TRUE;
}

int
main (int argc, char *argv[])
{
  JsonParser *parser;
  JsonNode *root;
  JsonObject *ro;
  JsonArray *array;
  JsonNode *node;
  const char *unicode;
  JsonObjectIter iter;
  GError *error = NULL;
  guint length, i;
  GVariantBuilder builder;
  GVariant *v;
  GString *s;
  GHashTable *names;
  GString *name_key;

  if (argc != 3)
    {
      g_print ("Usage: emoji-convert INPUT OUTPUT\n");
      return 1;
    }

  parser = json_parser_new ();

  if (!json_parser_load_from_file (parser, argv[1], &error))
    {
      g_error ("%s", error->message);
      return 1;
    }

  root = json_parser_get_root (parser);
  array = json_node_get_array (root);
  length = json_array_get_length (array);

  g_variant_builder_init (&builder, G_VARIANT_TYPE ("a(ausasu)"));
  for (i = 0; i < length; i++)
    {
      JsonObject *obj = json_array_get_object_element (array, i);
      GVariantBuilder b1;
      GVariantBuilder b2;
      guint group;
      const char *name;
      char *code;

      if (!json_object_has_member (obj, "group"))
        continue;

      group = json_object_get_int_member (obj, "group");
      name = json_object_get_string_member (obj, "label");

      if (json_object_has_member (obj, "skins"))
        {
          JsonArray *a2 = json_object_get_array_member (obj, "skins");
          JsonNode *n2 = json_array_get_element (a2, 0);
          JsonObject *o2 = json_node_get_object (n2);
          code = g_strdup (json_object_get_string_member (o2, "hexcode"));
        }
      else
        {
          code = g_strdup (json_object_get_string_member (obj, "hexcode"));
        }

      g_variant_builder_init (&b1, G_VARIANT_TYPE ("au"));

      if (!parse_code (&b1, code))
        return 1;

      g_variant_builder_init (&b2, G_VARIANT_TYPE ("as"));
      if (json_object_has_member (obj, "tags"))
        {
          JsonArray *tags = json_object_get_array_member (obj, "tags");
          for (int j = 0; j < json_array_get_length (tags); j++)
            g_variant_builder_add (&b2, "s", json_array_get_string_element (tags, j));
        }

      g_variant_builder_add (&builder, "(ausasu)", &b1, name, &b2, group);
    }

  v = g_variant_builder_end (&builder);
  if (g_str_has_suffix (argv[2], ".json"))
    {
      JsonNode *node;
      char *out;

      node = json_gvariant_serialize (v);
      out = json_to_string (node, TRUE);
      if (!g_file_set_contents (argv[2], out, -1, &error))
        {
          g_error ("%s", error->message);
          return 1;
        }
    }
  else
    {
      GBytes *bytes;

      bytes = g_variant_get_data_as_bytes (v);
      if (!g_file_set_contents (argv[2], g_bytes_get_data (bytes, NULL), g_bytes_get_size (bytes), &error))
        {
          g_error ("%s", error->message);
          return 1;
        }
    }

  return 0;
}