import debug from "debug";

import { NamedNode, Quad_Graph, Quad_Object, Quad_Predicate, Quad_Subject, Term, Util } from "n3";

import { filter } from "underscore";

import { Patch, QuadPattern } from "./patch";

const log = debug("autodep");

// use patch as an optional optimization, but you can't count on it

export type HandlerFunc = (p?: Patch) => void;

class Handler {

  patterns: QuadPattern[];

  innerHandlers: Handler[];

  }

}

export class AutoDependencies {

  handlers: Handler;

  handlerStack: Handler[];

    // tree of all known Handlers (at least those with non-empty

    // patterns). Top node is not a handler.

    this.handlers = new Handler(null, "root");

    this.handlerStack = [this.handlers]; // currently running

    log("window.ad");

    (window as any).ad = this;

      // assuming here it didn't get to do all its queries, we could

      // add a *,*,*,* handler to call for sure the next time?

      // log('done. got: ', handler.patterns)

      this.handlerStack.pop();

    }

  }

  // handler might have no watches, in which case we could forget about it

  logHandlerTree() {

    log("handler tree:");

    const shorten = (x: Term | null) => {

      if (x === null) {

        return "null";

  constructor() {

    super();

    this.status = "startup";

    const prefixes = new Map<string, string>([

      ["", "http://light9.bigasterisk.com/"],

      ["dev", "http://light9.bigasterisk.com/device/"],

      ["rdf", "http://www.w3.org/1999/02/22-rdf-syntax-ns#"],

      ["rdfs", "http://www.w3.org/2000/01/rdf-schema#"],

      ["xsd", "http://www.w3.org/2001/XMLSchema#"],

    ]);

    this.graph = new SyncedGraph(

      this.testGraph ? "unused" : "/rdfdb/api/syncedGraph",

    public prefixes: Map<string, string>,

    private setStatus: (status: string) => void

  ) {

    this.prefixFuncs = this.rebuildPrefixFuncs(prefixes);

    this.graph = new N3.Store();

    this.autoDeps = new AutoDependencies(this);

    this.clearGraph();

    this.client = new RdfDbClient(patchSenderUrl, this._clearGraphOnNewConnection.bind(this), this._applyPatch.bind(this), this.setStatus);

  }

  clearGraph() {