import { describe, it, expect, vi, beforeEach } from "vitest";

vi.mock("~/database/context", () => ({
  database: vi.fn(),
}));

import { anonymizeUserAccount } from "../user";
import { database } from "~/database/context";

const USER_ID = "a1b2c3d4-e5f6-7890-abcd-ef1234567890";

function makeDeleteChain() {
  return { where: vi.fn().mockResolvedValue(undefined) };
}

function makeUpdateChain() {
  const whereFn = vi.fn().mockResolvedValue(undefined);
  const setFn = vi.fn().mockReturnValue({ where: whereFn });
  return { set: setFn, _where: whereFn };
}

function makeAnonymizeDb() {
  const deleteChains: ReturnType<typeof makeDeleteChain>[] = [];
  const updateChain = makeUpdateChain();

  const deleteFn = vi.fn().mockImplementation(() => {
    const chain = makeDeleteChain();
    deleteChains.push(chain);
    return chain;
  });

  return {
    db: { delete: deleteFn, update: vi.fn().mockReturnValue(updateChain) },
    deleteChains,
    updateChain,
    deleteFn,
  };
}

beforeEach(() => {
  vi.clearAllMocks();
});

describe("anonymizeUserAccount", () => {
  it("deletes sessions and accounts for the user", async () => {
    const { db, deleteFn } = makeAnonymizeDb();
    vi.mocked(database).mockReturnValue(db as never);

    await anonymizeUserAccount(USER_ID);

    expect(deleteFn).toHaveBeenCalledTimes(2);
  });

  it("calls update on the users table with anonymized fields", async () => {
    const { db, updateChain } = makeAnonymizeDb();
    vi.mocked(database).mockReturnValue(db as never);

    await anonymizeUserAccount(USER_ID);

    expect(db.update).toHaveBeenCalledTimes(1);
    const setCall = updateChain.set.mock.calls[0][0];
    expect(setCall.email).toMatch(/^deleted-[a-f0-9]{8}@deleted\.brackt\.com$/);
    expect(setCall.displayName).toBeNull();
    expect(setCall.username).toBeNull();
    expect(setCall.imageUrl).toBeNull();
    expect(setCall.customAvatarUrl).toBeNull();
    expect(setCall.flagConfig).toBeNull();
    expect(setCall.avatarType).toBe("flag");
    expect(setCall.deletedAt).toBeInstanceOf(Date);
  });

  it("derives the short ID from the UUID", async () => {
    const { db, updateChain } = makeAnonymizeDb();
    vi.mocked(database).mockReturnValue(db as never);

    await anonymizeUserAccount(USER_ID);

    const setCall = updateChain.set.mock.calls[0][0];
    // USER_ID without dashes starts with "a1b2c3d4" → shortId = "a1b2c3d4"
    expect(setCall.email).toBe("deleted-a1b2c3d4@deleted.brackt.com");
  });
});