// @flow
import { subDays } from "date-fns";
import { Attachment, Document } from "../models";
import { buildAttachment, buildDocument } from "../test/factories";
import { flushdb } from "../test/support";
import documentPermanentDeleter from "./documentPermanentDeleter";

jest.mock("aws-sdk", () => {
  const mS3 = { deleteObject: jest.fn().mockReturnThis(), promise: jest.fn() };
  return {
    S3: jest.fn(() => mS3),
    Endpoint: jest.fn(),
  };
});

beforeEach(() => flushdb());

describe("documentPermanentDeleter", () => {
  it("should destroy documents", async () => {
    const document = await buildDocument({
      publishedAt: subDays(new Date(), 90),
      deletedAt: new Date(),
    });

    const countDeletedDoc = await documentPermanentDeleter([document]);

    expect(countDeletedDoc).toEqual(1);
    expect(await Document.unscoped().count({ paranoid: false })).toEqual(0);
  });

  it("should error when trying to destroy undeleted documents", async () => {
    const document = await buildDocument({
      publishedAt: new Date(),
    });

    let error;
    try {
      await documentPermanentDeleter([document]);
    } catch (err) {
      error = err.message;
    }

    expect(error).toEqual(
      `Cannot permanently delete ${document.id} document. Please delete it and try again.`
    );
  });

  it("should destroy attachments no longer referenced", async () => {
    const document = await buildDocument({
      publishedAt: subDays(new Date(), 90),
      deletedAt: new Date(),
    });

    const attachment = await buildAttachment({
      teamId: document.teamId,
      documentId: document.id,
    });

    document.text = `![text](${attachment.redirectUrl})`;
    await document.save();

    const countDeletedDoc = await documentPermanentDeleter([document]);

    expect(countDeletedDoc).toEqual(1);
    expect(await Attachment.count()).toEqual(0);
    expect(await Document.unscoped().count({ paranoid: false })).toEqual(0);
  });

  it("should handle unknown attachment ids", async () => {
    const document = await buildDocument({
      publishedAt: subDays(new Date(), 90),
      deletedAt: new Date(),
    });

    const attachment = await buildAttachment({
      teamId: document.teamId,
      documentId: document.id,
    });

    document.text = `![text](${attachment.redirectUrl})`;
    await document.save();

    // remove attachment so it no longer exists in the database, this is also
    // representative of a corrupt attachment id in the doc or the regex returning
    // an incorrect string
    await attachment.destroy({ force: true });

    const countDeletedDoc = await documentPermanentDeleter([document]);

    expect(countDeletedDoc).toEqual(1);
    expect(await Attachment.count()).toEqual(0);
    expect(await Document.unscoped().count({ paranoid: false })).toEqual(0);
  });

  it("should not destroy attachments referenced in other documents", async () => {
    const document1 = await buildDocument();

    const document = await buildDocument({
      teamId: document1.teamId,
      publishedAt: subDays(new Date(), 90),
      deletedAt: subDays(new Date(), 60),
    });

    const attachment = await buildAttachment({
      teamId: document1.teamId,
      documentId: document.id,
    });

    document1.text = `![text](${attachment.redirectUrl})`;
    await document1.save();

    document.text = `![text](${attachment.redirectUrl})`;
    await document.save();

    expect(await Attachment.count()).toEqual(1);

    const countDeletedDoc = await documentPermanentDeleter([document]);

    expect(countDeletedDoc).toEqual(1);
    expect(await Attachment.count()).toEqual(1);
    expect(await Document.unscoped().count({ paranoid: false })).toEqual(1);
  });
});