import * as _ from "lodash";

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

import {
  CompositeLevel,
} from "./composite_delta";

import {
  mockUuid,
  assert,
} from "./test_helpers";


describe("Composite delta", () => {

  it("Dependency", () => {
    const getId = mockUuid();
    const level = new CompositeLevel();

    const nodeCreation = new NodeCreation(getId());
    const composite1 = level.createComposite([nodeCreation]);
    assert(_.isEqual(composite1.getDependencies(), []), "expected composite1 to have no dependencies");


    const nodeDeletion = new NodeDeletion(nodeCreation, [], []);
    const nodeCreation2 = new NodeCreation(getId());
    const composite2 = level.createComposite([nodeDeletion, nodeCreation2]);
    assert(_.isEqual(composite2.getDependencies(), [composite1]), "expected composite2 to depend on composite 1");
  });

  it("Conflict", () => {
    const getId = mockUuid();
    const level = new CompositeLevel();

    const nodeCreation = new NodeCreation(getId());
    const compositeCreate = level.createComposite([nodeCreation]);

    const nodeDeletion1 = new NodeDeletion(nodeCreation, [], []);
    const compositeDelete1 = level.createComposite([nodeDeletion1]);
    assert(_.isEqual(compositeDelete1.getConflicts(), []), "there should not yet be a conflict")

    const nodeDeletion2 = new NodeDeletion(nodeCreation, [], []);
    const compositeDelete2 = level.createComposite([nodeDeletion2]);

    assert(_.isEqual(compositeDelete1.getConflicts(), [compositeDelete2]), "expected compositeDelete1 to conflict with compositeDelete2");
    assert(_.isEqual(compositeDelete2.getConflicts(), [compositeDelete1]), "expected compositeDelete1 to conflict with compositeDelete2");
  });

  // This was added after I found a bug:
  it("Dependency within composite", () => {
    const getId = mockUuid();
    const level = new CompositeLevel();

    const nodeCreation = new NodeCreation(getId());
    const nodeDeletion = new NodeDeletion(nodeCreation, [], []);

    const composite = level.createComposite([nodeCreation, nodeDeletion]);

    assert(_.isEqual(composite.getDependencies(), []), "expected composite to have no dependencies");
    assert(_.isEqual(composite.getConflicts(), []), "expected composite to have no conflicts");
  });
});