/**
 * Module: API for miscellaneous frontend model types. Future targets for refactoring aimed at extracting modules.
 */
import { DependencyMode } from './miscellaneous';
import { IConstituenta, IRSForm } from './rsform';

/**
 * Filter list of  {@link ILibraryItem} to a given query.
 */
export function applyGraphFilter(target: IRSForm, start: number, mode: DependencyMode): IConstituenta[] {
  if (mode === DependencyMode.ALL) {
    return target.items;
  }
  let ids: number[] | undefined = undefined;
  switch (mode) {
    case DependencyMode.OUTPUTS: {
      ids = target.graph.nodes.get(start)?.outputs;
      break;
    }
    case DependencyMode.INPUTS: {
      ids = target.graph.nodes.get(start)?.inputs;
      break;
    }
    case DependencyMode.EXPAND_OUTPUTS: {
      ids = target.graph.expandOutputs([start]);
      break;
    }
    case DependencyMode.EXPAND_INPUTS: {
      ids = target.graph.expandInputs([start]);
      break;
    }
  }
  if (!ids) {
    return target.items;
  } else {
    return target.items.filter(cst => ids!.find(id => id === cst.id));
  }
}