import { INestApplication } from '@nestjs/common';
import type { WatchListView, WatchStateView } from '@dorfteich/shared';
import { PrismaClient, User } from '@prisma/client';
import request from 'supertest';
import { afterAll, beforeAll, describe, expect, it } from 'vitest';

import { createTestApp, sessionCookieOf } from '../testing/test-app';
import { createTestPrisma, hasTestDb, uniqueSuffix } from '../testing/test-db';
import { UsersService } from '../users/users.service';

/**
 * Watches end to end (issue #93): per-user round-trip, read-gated targets,
 * preference-gated auto-watch for own pages and comments, the settings
 * list with unwatch for both target types, and purge cleanup.
 */
describe.skipIf(!hasTestDb)('watches (e2e, issue #93)', () => {
  let app: INestApplication;
  let prisma: PrismaClient;
  const suffix = uniqueSuffix();
  const password = 'beobachten heisst kuemmern 1';
  const users: Record<string, User> = {};
  const cookies: Record<string, string> = {};
  let pondId: string;

  const api = () => request(app.getHttpServer());

  async function makeUser(handle: string): Promise<void> {
    const service = app.get(UsersService);
    const username = `wa-${handle}-${suffix}`;
    const user = await service.createUser({
      username,
      email: `${username}@example.org`,
      displayName: `Wa ${handle}`,
      password,
      locale: 'en',
    });
    await service.markEmailVerified(user.id);
    users[handle] = user;
    cookies[handle] = sessionCookieOf(
      await api()
        .post('/api/v1/auth/login')
        .send({ usernameOrEmail: username, password })
        .expect(200),
    );
  }

  async function createPage(cookie: string, title: string): Promise<string> {
    const res = await api()
      .post(`/api/v1/ponds/${pondId}/pages`)
      .set('Cookie', cookie)
      .send({ title })
      .expect(201);
    return (res.body as { id: string }).id;
  }

  beforeAll(async () => {
    prisma = createTestPrisma();
    await prisma.rateLimit.deleteMany({});
    app = await createTestApp();
    for (const handle of ['owner', 'member', 'outsider']) await makeUser(handle);

    const pond = await prisma.pond.create({
      data: {
        slug: `wa-pond-${suffix}`,
        name: 'Watch Pond',
        type: 'SHARED',
        ownerId: users.owner!.id,
      },
    });
    pondId = pond.id;
    for (const [handle, role] of [
      ['owner', 'POND_ADMIN'],
      ['member', 'EDITOR'],
    ] as const) {
      await prisma.roleGrant.create({
        data: {
          pondId,
          subjectType: 'USER',
          subjectId: users[handle]!.id,
          role,
          scopeType: 'POND',
          effect: 'ALLOW',
          createdBy: users.owner!.id,
        },
      });
    }
  });

  afterAll(async () => {
    const ids = Object.values(users).map((u) => u.id);
    await prisma.watch.deleteMany({ where: { userId: { in: ids } } });
    await prisma.comment.deleteMany({ where: { page: { pondId } } });
    await prisma.roleGrant.deleteMany({ where: { pondId } });
    await prisma.page.deleteMany({ where: { pondId } });
    await prisma.pond.deleteMany({ where: { id: pondId } });
    await prisma.auditEntry.deleteMany({ where: { actorId: { in: ids } } });
    await prisma.session.deleteMany({ where: { userId: { in: ids } } });
    await prisma.userIdentity.deleteMany({ where: { userId: { in: ids } } });
    await prisma.user.deleteMany({ where: { id: { in: ids } } });
    await prisma.$disconnect();
    await app.close();
  });

  it('round-trips watch state per user for pages and ponds', async () => {
    const pageId = await createPage(cookies.owner!, 'Watched page');
    // Page creation auto-watched it for the owner; drop that to test manually.
    await api().delete(`/api/v1/watches/page/${pageId}`).set('Cookie', cookies.owner!).expect(200);

    await api().put(`/api/v1/watches/page/${pageId}`).set('Cookie', cookies.member!).expect(200);
    await api().put(`/api/v1/watches/pond/${pondId}`).set('Cookie', cookies.member!).expect(200);

    const memberState = (
      await api().get(`/api/v1/watches/page/${pageId}`).set('Cookie', cookies.member!).expect(200)
    ).body as WatchStateView;
    expect(memberState.watched).toBe(true);
    // Per-user: the owner is not subscribed just because the member is.
    const ownerState = (
      await api().get(`/api/v1/watches/page/${pageId}`).set('Cookie', cookies.owner!).expect(200)
    ).body as WatchStateView;
    expect(ownerState.watched).toBe(false);

    // Watching needs read access: the outsider gets a 404, never a row.
    await api().put(`/api/v1/watches/page/${pageId}`).set('Cookie', cookies.outsider!).expect(404);
    await api().put(`/api/v1/watches/pond/${pondId}`).set('Cookie', cookies.outsider!).expect(404);
  });

  it('auto-watches own pages and commented pages, gated by the preferences', async () => {
    // Default preferences: creating a page subscribes its author …
    const created = await createPage(cookies.member!, 'Auto watched');
    expect(
      (
        (await api()
          .get(`/api/v1/watches/page/${created}`)
          .set('Cookie', cookies.member!)
          .expect(200)) as { body: WatchStateView }
      ).body.watched,
    ).toBe(true);

    // … and commenting subscribes the commenter.
    await api()
      .post(`/api/v1/pages/${created}/comments`)
      .set('Cookie', cookies.owner!)
      .send({ body: 'watching this now' })
      .expect(201);
    expect(
      (
        (await api()
          .get(`/api/v1/watches/page/${created}`)
          .set('Cookie', cookies.owner!)
          .expect(200)) as { body: WatchStateView }
      ).body.watched,
    ).toBe(true);

    // Disabling the preferences stops both behaviors.
    await api()
      .patch('/api/v1/users/me')
      .set('Cookie', cookies.member!)
      .send({ autoWatchOwnPages: false, autoWatchOnComment: false })
      .expect(200);
    const second = await createPage(cookies.member!, 'Not auto watched');
    expect(
      (
        (await api()
          .get(`/api/v1/watches/page/${second}`)
          .set('Cookie', cookies.member!)
          .expect(200)) as { body: WatchStateView }
      ).body.watched,
    ).toBe(false);
    await api()
      .post(`/api/v1/pages/${second}/comments`)
      .set('Cookie', cookies.member!)
      .send({ body: 'no subscription please' })
      .expect(201);
    expect(
      (
        (await api()
          .get(`/api/v1/watches/page/${second}`)
          .set('Cookie', cookies.member!)
          .expect(200)) as { body: WatchStateView }
      ).body.watched,
    ).toBe(false);
  });

  it('lists own watches with names and unwatches both types from settings', async () => {
    const pageId = await createPage(cookies.owner!, 'Listed page');
    await api().put(`/api/v1/watches/page/${pageId}`).set('Cookie', cookies.member!).expect(200);
    await api().put(`/api/v1/watches/pond/${pondId}`).set('Cookie', cookies.member!).expect(200);

    const list = (
      await api().get('/api/v1/users/me/watches').set('Cookie', cookies.member!).expect(200)
    ).body as WatchListView;
    const pageEntry = list.watches.find((w) => w.targetId === pageId);
    const pondEntry = list.watches.find((w) => w.targetId === pondId);
    expect(pageEntry).toMatchObject({ targetType: 'page', name: 'Listed page' });
    expect(pageEntry?.slug).toBeTruthy();
    expect(pondEntry).toMatchObject({ targetType: 'pond', name: 'Watch Pond', slug: null });

    // Unwatch both types (the settings list's action).
    await api().delete(`/api/v1/watches/page/${pageId}`).set('Cookie', cookies.member!).expect(200);
    await api().delete(`/api/v1/watches/pond/${pondId}`).set('Cookie', cookies.member!).expect(200);
    const after = (
      await api().get('/api/v1/users/me/watches').set('Cookie', cookies.member!).expect(200)
    ).body as WatchListView;
    expect(after.watches.find((w) => w.targetId === pageId)).toBeUndefined();
    expect(after.watches.find((w) => w.targetId === pondId)).toBeUndefined();
  });

  it('drops unreadable targets from the list and cleans up on purge', async () => {
    const pageId = await createPage(cookies.owner!, 'Vanishing page');
    await api().put(`/api/v1/watches/page/${pageId}`).set('Cookie', cookies.member!).expect(200);

    // Trash hides it from the list (target no longer live) …
    await prisma.page.update({
      where: { id: pageId },
      data: { deletedAt: new Date(), deletedBy: users.owner!.id },
    });
    const list = (
      await api().get('/api/v1/users/me/watches').set('Cookie', cookies.member!).expect(200)
    ).body as WatchListView;
    expect(list.watches.find((w) => w.targetId === pageId)).toBeUndefined();

    // … and purge removes the rows entirely (trash service hook).
    await api().delete(`/api/v1/pages/${pageId}/purge`).set('Cookie', cookies.owner!).expect(204);
    expect(await prisma.watch.count({ where: { targetId: pageId } })).toBe(0);
  });
});