// global_config.js
import Parse from 'parse/node';
import PromiseRouter from '../PromiseRouter';
import * as middleware from '../middlewares';

export class GlobalConfigRouter extends PromiseRouter {
  getGlobalConfig(req) {
    return req.config.database
      .find('_GlobalConfig', { objectId: '1' }, { limit: 1 })
      .then(results => {
        if (results.length != 1) {
          // If there is no config in the database - return empty config.
          return { response: { params: {} } };
        }
        const globalConfig = results[0];
        return { response: { params: globalConfig.params } };
      });
  }

  updateGlobalConfig(req) {
    if (req.auth.isReadOnly) {
      throw new Parse.Error(
        Parse.Error.OPERATION_FORBIDDEN,
        "read-only masterKey isn't allowed to update the config."
      );
    }
    const params = req.body.params;
    // Transform in dot notation to make sure it works
    const update = Object.keys(params).reduce((acc, key) => {
      acc[`params.${key}`] = params[key];
      return acc;
    }, {});
    return req.config.database
      .update('_GlobalConfig', { objectId: '1' }, update, { upsert: true })
      .then(() => ({ response: { result: true } }));
  }

  mountRoutes() {
    this.route('GET', '/config', req => {
      return this.getGlobalConfig(req);
    });
    this.route(
      'PUT',
      '/config',
      middleware.promiseEnforceMasterKeyAccess,
      req => {
        return this.updateGlobalConfig(req);
      }
    );
  }
}

export default GlobalConfigRouter;