import { Rule } from '@angular-devkit/schematics';
import { ClassRelationEnum, ModelRelation } from '@vmfvmf/ywtc-lib';
import { getModelById, getPrjSrd } from '../../../router.gen';
import { BackEndGenerator } from '../../../shared/generator';
import { underscore } from '@angular-devkit/core/src/utils/strings';

export function gen(rel: ModelRelation): Rule {
  if (rel.relation !== ClassRelationEnum.ManyToMany) {
    throw Error("For creating a MxN script is required a parent relation many to many");
  }
  var model = getModelById(rel.modelId);
  const parentName = underscore(model.name!);
  const childName = underscore(rel.toModelName);
  return new BackEndGenerator(__filename).gen({...model, ...getPrjSrd(), parentName, childName});
}