/**
 * Trying the editor without an account (#428): what a session may do, the guest's project held in
 * the tab, the stores that refuse before they ask, and the routes of demo copies and demo material.
 */
import { afterEach, describe, expect, it, vi } from 'vitest';
import { HttpDemoStore } from '../../src/core/store/DemoStore';
import { HttpFileStore } from '../../src/core/store/HttpFileStore';
import { MemoryProjectStore } from '../../src/core/store/MemoryProjectStore';
import { StaleRevisionError } from '../../src/core/store/ProjectStore';
import { serializeProject } from '../../src/core/store/serialize';
import { guestFiles, guestReleases, guestSnapshots, guestVideos } from '../../src/editor/guestStores';
import { GUEST_REFUSAL, type SessionAction, sessionAllows } from '../../src/editor/session';
import { snapshotBlocker } from '../../src/editor/snapshots';
import { makeProject } from '../helpers';

const TOKEN = '0123456789abcdef0123456789abcdef';
const FILE = `a590cab0f8b7/${'b'.repeat(64)}.png`;

function stubFetch(body: BodyInit | null, init: ResponseInit) {
  const mock = vi.fn<typeof fetch>(() => Promise.resolve(new Response(body, init)));
  vi.stubGlobal('fetch', mock);
  return mock;
}

afterEach(() => {
  vi.unstubAllGlobals();
});

describe('what a session may do', () => {
  const actions: SessionAction[] = [
    'save',
    'upload',
    'deleteFile',
    'projects',
    'snapshots',
    'release',
    'password',
    'users',
    'demoCopy',
    'offerDemo',
  ];

  it('a guest writes nothing to the server and manages nothing', () => {
    for (const action of actions)
      expect(sessionAllows({ guest: true, role: 'user' }, action), action).toBe(false);
    // Not even a guest who somehow carried an administrator's role.
    for (const action of actions)
      expect(sessionAllows({ guest: true, role: 'admin' }, action), action).toBe(false);
  });

  it('an account does all of it but the administrators’ own', () => {
    const user = actions.filter((action) => sessionAllows({ guest: false, role: 'user' }, action));
    expect(user).toEqual(['save', 'upload', 'deleteFile', 'projects', 'snapshots', 'release', 'password']);
    expect(actions.every((action) => sessionAllows({ guest: false, role: 'admin' }, action))).toBe(true);
  });
});

describe("a guest's project, held in the tab", () => {
  const raw = () => serializeProject(makeProject().project);

  it('is the one project there is, under the token, and loads after `prepare` saw it', async () => {
    const store = new MemoryProjectStore(TOKEN, 'Platformer', raw(), GUEST_REFUSAL);
    expect(await store.list()).toEqual([
      expect.objectContaining({ id: TOKEN, name: 'Platformer', revision: 1 }),
    ]);
    const seen: unknown[] = [];
    const loaded = await store.load(TOKEN, (json) => {
      seen.push(json);
      return Promise.resolve();
    });
    expect(seen).toHaveLength(1);
    expect(loaded.project.id).toBe(TOKEN);
    expect(loaded.revision).toBe(1);
    await expect(store.load('another')).rejects.toThrow(/not found/);
  });

  it('keeps a save in the tab, with the revision moving on as on the server', async () => {
    const store = new MemoryProjectStore(TOKEN, 'Platformer', raw(), GUEST_REFUSAL);
    const { project } = await store.load(TOKEN);
    project.name = 'Changed';
    expect(await store.save(project, 1)).toBe(2);
    expect((await store.load(TOKEN)).project.name).toBe('Changed');
    await expect(store.save(project, 1)).rejects.toBeInstanceOf(StaleRevisionError);
  });

  it('refuses to make or delete a project, with what a guest is told', async () => {
    const store = new MemoryProjectStore(TOKEN, 'Platformer', raw(), GUEST_REFUSAL);
    await expect(store.create('New')).rejects.toThrow(GUEST_REFUSAL);
    await expect(store.delete(TOKEN)).rejects.toThrow(GUEST_REFUSAL);
  });
});

describe("a guest's stores", () => {
  it('list what the server offers, and refuse every write without asking it', async () => {
    const mock = stubFetch(JSON.stringify([{ file: FILE, demo: true }]), { status: 200 });
    const textures = guestFiles(new HttpFileStore('/api', 'textures'));
    expect(await textures.list()).toEqual([{ file: FILE, demo: true }]);
    expect(mock).toHaveBeenCalledTimes(1);

    await expect(textures.upload(new Blob(['x']), 'image/png', 'x.png')).rejects.toThrow(GUEST_REFUSAL);
    await expect(textures.delete(FILE)).rejects.toThrow(GUEST_REFUSAL);
    const videos = guestVideos({
      ...new HttpFileStore('/api', 'videos'),
      convert: () => Promise.reject(new Error('unreached')),
    } as never);
    await expect(videos.convert('x.mp4')).rejects.toThrow(GUEST_REFUSAL);
    await expect(guestSnapshots.create(TOKEN, 'one')).rejects.toThrow(GUEST_REFUSAL);
    await expect(guestReleases.publish(TOKEN)).rejects.toThrow(GUEST_REFUSAL);
    expect(mock).toHaveBeenCalledTimes(1);
  });
});

describe('demo copies and demo material', () => {
  it('are listed and loaded without a project id, and made per project', async () => {
    const mock = stubFetch(JSON.stringify([]), { status: 200 });
    const demos = new HttpDemoStore('/api');
    await demos.list();
    await demos.load(TOKEN);
    await demos.publish('p1');
    await demos.takeDown('p1');
    const calls = mock.mock.calls.map(
      ([url, init]) => `${init?.method} ${decodeURIComponent(url as string)}`,
    );
    expect(calls).toEqual([
      'GET /api?r=demos',
      `GET /api?r=demos/${TOKEN}`,
      'POST /api?r=projects/p1/demo',
      'DELETE /api?r=projects/p1/demo',
    ]);
  });

  it('offering a file is only there for an administrator, and sends the switch', async () => {
    expect(new HttpFileStore('/api', 'textures').setDemo).toBeUndefined();
    const mock = stubFetch(null, { status: 204 });
    await new HttpFileStore('/api', 'textures', true).setDemo!(FILE, true);
    const [url, init] = mock.mock.calls[0]!;
    expect(decodeURIComponent(url as string)).toBe(`/api?r=textures/${FILE}`);
    expect(init?.method).toBe('PATCH');
    expect(JSON.parse(init?.body as string)).toEqual({ demo: true });
  });

  it('is not made of a stand that was not saved', () => {
    expect(snapshotBlocker('error', 'demo')).toBe(
      'The project could not be saved, so there is nothing current to make a demo copy of',
    );
    expect(snapshotBlocker('saved', 'demo')).toBeNull();
  });
});