const Gio = imports.gi.Gio;
const Config = imports.misc.config;
const ExtensionUtils = imports.misc.extensionUtils;

/**
 * getSettings:
 * @schema: (optional): the GSettings schema id
 *
 * Builds and return a GSettings schema for @schema, using schema files
 * in extensionsdir/schemas. If @schema is not provided, it is taken from
 * metadata['settings-schema'].
 */
function getSettings(schema) {
  let extension = ExtensionUtils.getCurrentExtension();

  schema = schema || extension.metadata["settings-schema"];

  const GioSSS = Gio.SettingsSchemaSource;

  // check if this extension was built with "make zip-file", and thus
  // has the schema files in a subfolder
  // otherwise assume that extension has been installed in the
  // same prefix as gnome-shell (and therefore schemas are available
  // in the standard folders)
  let schemaDir = extension.dir.get_child("schemas");
  let schemaSource;
  if (schemaDir.query_exists(null))
    schemaSource = GioSSS.new_from_directory(
      schemaDir.get_path(),
      GioSSS.get_default(),
      false
    );
  else schemaSource = GioSSS.get_default();

  let schemaObj = schemaSource.lookup(schema, true);
  if (!schemaObj)
    throw new Error(
      "Schema " +
        schema +
        " could not be found for extension " +
        extension.metadata.uuid +
        ". Please check your installation."
    );

  return new Gio.Settings({ settings_schema: schemaObj });
}