CREATE OR REPLACE FUNCTION cdb_geocoder_server.cdb_geocode_admin0_polygon(username text, orgname text, country_name text)
RETURNS Geometry AS $$
    from cartodb_services.metrics import QuotaService
    from cartodb_services.metrics import InternalGeocoderConfig

    plpy.execute("SELECT cdb_geocoder_server._connect_to_redis('{0}')".format(username))
    redis_conn = GD["redis_connection_{0}".format(username)]['redis_metrics_connection']
    user_geocoder_config = InternalGeocoderConfig(redis_conn, username, orgname)

    quota_service = QuotaService(user_geocoder_config, redis_conn)
    try:
      plan = plpy.prepare("SELECT cdb_geocoder_server._cdb_geocode_admin0_polygon(trim($1)) AS mypolygon", ["text"])
      rv = plpy.execute(plan, [plpy.quote_nullable(country_name)], 1)
      result = rv[0]["mypolygon"]
      if result:
        quota_service.increment_success_geocoder_use()
        return result
      else:
        quota_service.increment_empty_geocoder_use()
        return None
    except BaseException as e:
      import sys, traceback
      type_, value_, traceback_ = sys.exc_info()
      quota_service.increment_failed_geocoder_use()
      error_msg = 'There was an error trying to geocode using admin0 geocoder: {0}'.format(e)
      plpy.notice(traceback.format_tb(traceback_))
      plpy.error(error_msg)
    finally:
      quota_service.increment_total_geocoder_use()
$$ LANGUAGE plpythonu;


--------------------------------------------------------------------------------

-- Implementation of the server extension
-- Note: these functions depend on the cdb_geocoder extension
CREATE OR REPLACE FUNCTION cdb_geocoder_server._cdb_geocode_admin0_polygon(country_name text)
RETURNS Geometry AS $$
  DECLARE
    ret Geometry;
  BEGIN
    SELECT n.the_geom as geom INTO ret
      FROM (SELECT q, lower(regexp_replace(q, '[^a-zA-Z\u00C0-\u00ff]+', '', 'g'))::text x
        FROM (SELECT country_name q) g) d
      LEFT OUTER JOIN admin0_synonyms s ON name_ = d.x
      LEFT OUTER JOIN ne_admin0_v3 n ON s.adm0_a3 = n.adm0_a3 GROUP BY d.q, n.the_geom, s.adm0_a3;

    RETURN ret;
  END
$$ LANGUAGE plpgsql;
