import { ValidatedMethod } from 'meteor/mdg:validated-method';
import SimpleSchema from 'simpl-schema';
import { RateLimiterMixin } from 'ddp-rate-limiter-mixin';
import LibraryNodes from '/imports/api/library/LibraryNodes.js';
import {
  assertDocEditPermission,
  assertViewPermission,
} from '/imports/api/sharing/sharingPermissions.js';
import fetchDocByRef from '/imports/api/parenting/fetchDocByRef.js';

const updateReferenceNode = new ValidatedMethod({
  name: 'libraryNodes.updateReferenceNode',
  validate: new SimpleSchema({
    _id: {
      type: String,
      regEx: SimpleSchema.RegEx.Id,
    }
  }).validator(),
  mixins: [RateLimiterMixin],
  rateLimit: {
    numRequests: 5,
    timeInterval: 5000,
  },
  run({_id}) {
    let userId = this.userId;
    let node = LibraryNodes.findOne(_id);
    assertDocEditPermission(node, userId);
    updateReferenceNodeWork(node, userId);
  },
});

function writeCache(_id, cache){
  LibraryNodes.update(_id, {$set: {cache}}, {
    selector: {type: 'reference'},
  });
}

function updateReferenceNodeWork(node, userId){
  let cache = {}
  if (!node.ref){
    writeCache(node._id, cache);
    return;
  }
  let doc, library;
  try {
    doc = fetchDocByRef(node.ref);
    if (doc.removed) throw 'Property has been deleted';
    if (doc.ancestors[0].id !== node.ancestors[0].id){
      library = fetchDocByRef(doc.ancestors[0]);
      assertViewPermission(library, userId)
    }
  } catch(e){
    cache = {error: e.reason || e.message || e.toString()}
    writeCache(node._id, cache);
    return;
  }
  cache = {
    node: doc,
  };
  if (library){
    cache.library = {name: library.name};
  }
  writeCache(node._id, cache);
}

export default updateReferenceNode;
export { updateReferenceNodeWork }