import {TrivialParser} from "./trivial_parser";

import {
  initialVersion,
  VersionRegistry,
} from "../onion/version";

import {
  NodeCreation,
  NodeDeletion,
  EdgeCreation,
  EdgeUpdate,
} from "../onion/primitive_delta";

import {CompositeLevel} from "../onion/composite_delta";
import {mockUuid} from "../onion/test_helpers";
import {assert} from "../util/assert";

describe("Trivial Parser", () => {
  it("Parse CS creation and deletion", () => {
    const registry = new VersionRegistry();
    const csLvl = new CompositeLevel();
    const asLvl = new CompositeLevel();
    const corrLvl = new CompositeLevel();
    const getUuid = mockUuid();
    const parser = new TrivialParser(registry, csLvl, asLvl, corrLvl, getUuid);

    const csInitial = initialVersion;
    const corrInitial = initialVersion;
    const asInitital = initialVersion;

    const csCreation = new NodeCreation(getUuid());
    const csDeletion = new NodeDeletion(csCreation, [], []);

    const csV1 = registry.createVersion(csInitial, csLvl.createComposite([csCreation]));
    const csV2 = registry.createVersion(csV1, csLvl.createComposite([csDeletion]));

    const corrV1 = parser.parse(csV1, corrInitial);
    const corrV2 = parser.parse(csV2, corrV1);

    const asV2 = corrV2.getEmbedded("as")?.embedded;
    if (asV2 === undefined) {
      throw new Error("Expected asV2 to exist!");
    }
    
    const asV2Primitives = [...asV2.iterPrimitiveDeltas()];
    assert(asV2Primitives.length === 2, "Expected 2 primitive deltas on AS");
  });
});