/**
 * GET /api/plugin-pois e2e (#1781): the real guard chain and the real contribution
 * module against a temp SQLite db, with only the plugin itself played by a spy.
 *
 * The unit tests pin the parsing and the normalizer. What only a booted container
 * shows is that the route sits behind JwtAuthGuard (401 before anything else), that
 * the bespoke 400s survive the global pipe, and that the declaration it re-reads is
 * the plugins row, so a category the manifest never declared is a 404 however
 * willing the plugin would be to answer it.
 */
import { db } from '../../src/db/database';
import { TrekExceptionFilter } from '../../src/nest/common/trek-exception.filter';
import { ZodValidationPipe } from '../../src/nest/common/zod-validation.pipe';
import { PluginContributionsModule } from '../../src/nest/plugins/contributions/plugin-contributions.module';
import { PluginHooks } from '../../src/nest/plugins/plugin-hooks.service';
import { RealtimeModule } from '../../src/nest/realtime/realtime.module';
import { makePlugin } from '../helpers/factories/plugins';
import { makeUser } from '../helpers/factories/users';
import { createTestMikroOrmModule, createTestOrm } from '../helpers/test-orm';
import { TestUnitOfWorkModule } from '../helpers/test-uow';
import { sessionCookie } from './harness';
import { Test } from '@nestjs/testing';

import cookieParser from 'cookie-parser';
import type { Server } from 'http';
import request from 'supertest';
import { describe, it, expect, beforeAll, afterAll, beforeEach, vi, type MockInstance } from 'vitest';

// Off while the app boots, so the runtime does not go looking for plugins on disk;
// the tests switch it on.
const { pluginsEnabled } = vi.hoisted(() => ({ pluginsEnabled: { value: false } }));

vi.mock('../../src/db/database', async () => {
  const { createSnapshotTestDb } = await import('../helpers/db-mock');
  const db = createSnapshotTestDb();
  return {
    db,
    canAccessTrip: () => undefined,
    isOwner: () => false,
    getPlaceWithTags: () => null,
    closeDb: () => {},
    reinitialize: () => {},
  };
});
vi.mock('../../src/nest/plugins/kill-switch', () => ({ pluginsEnabled: () => pluginsEnabled.value }));

const trailheads = { id: 'trailheads', label: 'Trailheads', icon: 'Signpost', color: '#2f855a' };
const query = {
  pluginId: 'trail-finder',
  category: 'trailheads',
  south: '47',
  west: '11',
  north: '47.5',
  east: '11.5',
  lang: 'de',
};

describe('Plugin POIs e2e (real guard chain + temp SQLite)', () => {
  let server: Server;
  let app: Awaited<ReturnType<typeof build>>;
  let providersOf: MockInstance;
  let categoryPois: MockInstance;

  async function build() {
    const moduleRef = await Test.createTestingModule({
      imports: [
        await TestUnitOfWorkModule.forRoot(db),
        await createTestMikroOrmModule(db),
        RealtimeModule,
        PluginContributionsModule,
      ],
    }).compile();
    const nest = moduleRef.createNestApplication();
    nest.use(cookieParser());
    nest.useGlobalPipes(new ZodValidationPipe());
    nest.useGlobalFilters(new TrekExceptionFilter());
    await nest.init();
    return nest;
  }

  beforeAll(async () => {
    // The user sessionCookie(1) is signed for, pinned to id 1.
    const orm = await createTestOrm(db);
    await makeUser(orm, { id: 1, username: 'e2e-user', email: 'e2e@example.test', role: 'user', password_version: 0 });
    await makePlugin(orm, 'trail-finder', {
      name: 'Trail Finder',
      status: 'active',
      capabilities: JSON.stringify({ poiCategories: [trailheads] }),
      granted_permissions: JSON.stringify(['hook:poi-category-provider']),
    });
    await orm.close();
    app = await build();
    const hooks = app.get(PluginHooks, { strict: false });
    providersOf = vi.spyOn(hooks, 'providersOf');
    categoryPois = vi.spyOn(hooks, 'categoryPois');
    server = app.getHttpServer();
    pluginsEnabled.value = true;
  });

  beforeEach(() => {
    providersOf.mockReset().mockReturnValue(['trail-finder']);
    categoryPois.mockReset().mockResolvedValue([
      { id: 'th-1', name: 'Trailhead', lat: 47.2, lng: 11.2, details: [{ label: 'Length', value: '12 km' }] },
      { id: 'far', name: 'Elsewhere', lat: 49, lng: 11.2 },
    ]);
  });

  afterAll(async () => {
    await app?.close();
  });

  const cookie = () => sessionCookie(1);

  it('refuses a caller without a session before anything else', async () => {
    await request(server).get('/api/plugin-pois').query(query).expect(401);
    expect(categoryPois).not.toHaveBeenCalled();
  });

  it('answers the bespoke 400s of /api/maps/pois', async () => {
    const res = await request(server)
      .get('/api/plugin-pois')
      .set('Cookie', cookie())
      .query({ ...query, category: '' })
      .expect(400);
    expect(res.body).toMatchObject({ error: 'A category is required' });
    const bbox = await request(server)
      .get('/api/plugin-pois')
      .set('Cookie', cookie())
      .query({ ...query, north: 'x' })
      .expect(400);
    expect(bbox.body).toMatchObject({ error: 'A valid bbox (south, west, north, east) is required' });
    expect(categoryPois).not.toHaveBeenCalled();
  });

  it('answers 404 for a category the manifest never declared, or a plugin that is not a provider', async () => {
    await request(server)
      .get('/api/plugin-pois')
      .set('Cookie', cookie())
      .query({ ...query, category: 'huts' })
      .expect(404);
    providersOf.mockReturnValue([]);
    await request(server).get('/api/plugin-pois').set('Cookie', cookie()).query(query).expect(404);
    expect(categoryPois).not.toHaveBeenCalled();
  });

  it('returns the declared category, answered by its plugin and clipped to the box', async () => {
    const res = await request(server).get('/api/plugin-pois').set('Cookie', cookie()).query(query).expect(200);
    expect(res.body).toMatchObject({ source: 'plugin:trail-finder', truncated: false, clamped: false });
    expect(res.body.pois).toEqual([
      expect.objectContaining({
        osm_id: 'plugin:trail-finder:th-1',
        category: 'plugin:trail-finder/trailheads',
        icon: 'Signpost',
        color: '#2f855a',
        details: [{ label: 'Length', value: '12 km' }],
      }),
    ]);
    expect(categoryPois).toHaveBeenCalledWith(
      'trail-finder',
      { category: 'trailheads', bounds: { south: 47, west: 11, north: 47.5, east: 11.5 }, lang: 'de', limit: 60 },
      1,
    );
  });

  it('turns a failing plugin into a 502 for that chip only', async () => {
    categoryPois.mockRejectedValue(new Error('plugin invoke timed out'));
    const res = await request(server).get('/api/plugin-pois').set('Cookie', cookie()).query(query).expect(502);
    expect(res.body).toMatchObject({ error: 'The plugin did not answer' });
  });

  it('answers 404 while the plugin runtime is switched off', async () => {
    pluginsEnabled.value = false;
    try {
      await request(server).get('/api/plugin-pois').set('Cookie', cookie()).query(query).expect(404);
      expect(categoryPois).not.toHaveBeenCalled();
    } finally {
      pluginsEnabled.value = true;
    }
  });
});