import {NextFunction, Request, Response} from 'express';
import {ErrorCodes, ErrorDTO} from '../../../common/entities/Error';
import {UserRoles} from '../../../common/entities/UserDTO';
import {ObjectManagers} from '../../model/ObjectManagers';

export class UserRequestConstrainsMWs {

  public static forceSelfRequest(req: Request, res: Response, next: NextFunction) {
    if ((typeof req.params === 'undefined') || (typeof req.params.id === 'undefined')) {
      return next();
    }
    if (req.session.user.id !== parseInt(req.params.id, 10)) {
      return next(new ErrorDTO(ErrorCodes.NOT_AUTHORISED));
    }

    return next();
  }


  public static notSelfRequest(req: Request, res: Response, next: NextFunction) {
    if ((typeof req.params === 'undefined') || (typeof req.params.id === 'undefined')) {
      return next();
    }

    if (req.session.user.id === parseInt(req.params.id, 10)) {
      return next(new ErrorDTO(ErrorCodes.NOT_AUTHORISED));
    }

    return next();
  }

  public static async notSelfRequestOr2Admins(req: Request, res: Response, next: NextFunction) {
    if ((typeof req.params === 'undefined') || (typeof req.params.id === 'undefined')) {
      return next();
    }

    if (req.session.user.id !== parseInt(req.params.id, 10)) {
      return next();
    }

    // TODO: fix it!
    try {
      const result = await ObjectManagers.getInstance().UserManager.find({minRole: UserRoles.Admin});
      if (result.length <= 1) {
        return next(new ErrorDTO(ErrorCodes.GENERAL_ERROR));
      }
      return next();

    } catch (err) {
      return next(new ErrorDTO(ErrorCodes.GENERAL_ERROR));
    }

  }


}
