/**
 * Dawarich e2e — drives /api/integrations/dawarich through the REAL AddonGuard
 * and the REAL JwtAuthGuard, over the real DI-native services (DatabaseModule +
 * DawarichModule) against a temp SQLite db carrying the full schema.
 *
 * Two things are replaced and nothing else:
 *
 *  - `AddonsService.isAddonEnabled`, because the gate is what is under test and
 *    an admin toggle is not worth seeding for it;
 *  - `DawarichClient`, because a test must never open a socket to somebody's
 *    location archive. Every method is a spy that fails loudly if a route this
 *    file exercises turns out to reach upstream after all.
 *
 * Covered: the 404-before-401 ordering of the addon gate, the unauthenticated
 * 401, the shape of a connection nobody has configured, the two URL rejections
 * that need no DNS, the suggestions envelope's `connected: false`, and the
 * cross-user isolation — someone else's suggestion is invisible and untouchable
 * through your own session, and answers the same 404 a missing one does. The
 * bucket-list and Atlas tools of DawarichAtlasMcp run next to their routes on
 * the same container, so the two channels are held to the same answers.
 */
import { db } from '../../src/db/database';
import { BucketList } from '../../src/db/entities/BucketList.entity';
import { DawarichConnections } from '../../src/db/entities/DawarichConnections.entity';
import { DawarichVisitSuggestions } from '../../src/db/entities/DawarichVisitSuggestions.entity';
import { VisitedCountries } from '../../src/db/entities/VisitedCountries.entity';
import { trekMcpErrorMapper } from '../../src/mcp/nest-mcp-policy';
import type { McpContext, McpTextResult } from '../../src/nest-mcp';
import { AddonsService } from '../../src/nest/addons/addons.service';
import { TrekExceptionFilter } from '../../src/nest/common/trek-exception.filter';
import { ZodValidationPipe } from '../../src/nest/common/zod-validation.pipe';
import { withRequestContext } from '../../src/nest/database/request-context';
import { DawarichAtlasMcp } from '../../src/nest/integrations/dawarich-atlas.mcp';
import { DawarichClient, DawarichError } from '../../src/nest/integrations/dawarich.client';
import { DawarichModule } from '../../src/nest/integrations/dawarich.module';
import { createUser } from '../helpers/factories';
import { makeBucketListItem } from '../helpers/factories/atlas';
import { countRows, deleteRows, findRow, insertRow } from '../helpers/factories/rows';
import { createTestMikroOrmModule, createTestOrm, type TestOrm } from '../helpers/test-orm';
import { TestUnitOfWorkModule } from '../helpers/test-uow';
import { sessionCookie } from './harness';
import { MikroORM } from '@mikro-orm/core';
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 } from 'vitest';

vi.mock('../../src/db/database', async () => {
  const { createSnapshotTestDb } = await import('../helpers/db-mock');
  const db = createSnapshotTestDb();
  return {
    db,
    closeDb: () => {},
    reinitialize: () => {},
    getPlaceWithTags: () => null,
    isOwner: () => false,
  };
});

const { isAddonEnabled } = vi.hoisted(() => ({ isAddonEnabled: vi.fn(() => true) }));

let orm: TestOrm;

/**
 * Every outbound call an instance would ever receive, stubbed to throw. A route
 * that unexpectedly reaches upstream fails this suite instead of quietly
 * hanging on a DNS lookup in CI.
 */
function makeClientStub() {
  const boom = (name: string) =>
    vi.fn(() => {
      throw new Error(`DawarichClient.${name} must not be called from the e2e suite`);
    });
  return {
    probe: boom('probe'),
    listVisits: boom('listVisits'),
    listTracks: boom('listTracks'),
    listPoints: boom('listPoints'),
    listVisitedCities: boom('listVisitedCities'),
    findVisitsNear: boom('findVisitsNear'),
  };
}

/** A suggestion row with only the NOT NULL columns filled in. */
function seedSuggestion(userId: number, sourceVisitId: string, name: string): Promise<number> {
  return insertRow(orm, DawarichVisitSuggestions, {
    user: userId,
    source_visit_id: sourceVisitId,
    name,
    lat: 48.8584,
    lng: 2.2945,
    started_at: '2026-05-01T10:00:00+02:00',
    ended_at: '2026-05-01T12:30:00+02:00',
    duration_minutes: 150,
    local_date: '2026-05-01',
    source_hash: 'hash-' + sourceVisitId,
  });
}

describe('Dawarich e2e (real addon gate + real auth guard + real services + temp SQLite)', () => {
  let server: Server;
  let app: Awaited<ReturnType<typeof build>>;
  let ownerId: number;
  let strangerId: number;
  let strangerSuggestionId: number;

  async function build() {
    const moduleRef = await Test.createTestingModule({
      imports: [await TestUnitOfWorkModule.forRoot(db), await createTestMikroOrmModule(db), DawarichModule],
    })
      .overrideProvider(AddonsService)
      .useValue({ isAddonEnabled })
      .overrideProvider(DawarichClient)
      .useValue(makeClientStub())
      .compile();
    const nest = moduleRef.createNestApplication();
    nest.use(cookieParser());
    nest.useGlobalFilters(new TrekExceptionFilter());
    // Mirror the production APP_PIPE (app.module.ts): DTO-typed bodies validate
    // by metatype, exactly as they do under buildApp().
    nest.useGlobalPipes(new ZodValidationPipe());
    await nest.init();
    return nest;
  }

  beforeAll(async () => {
    orm = await createTestOrm(db);
    ownerId = createUser(db as never, { username: 'dawarich-owner', email: 'dawarich-owner@test.example' }).user.id;
    strangerId = createUser(db as never, { username: 'dawarich-stranger', email: 'dawarich-stranger@test.example' })
      .user.id;
    strangerSuggestionId = await seedSuggestion(strangerId, 'visit-stranger-1', 'Eiffel Tower');
    app = await build();
    server = app.getHttpServer();
  });

  beforeEach(async () => {
    isAddonEnabled.mockReturnValue(true);
    await deleteRows(orm, DawarichConnections);
    await deleteRows(orm, DawarichVisitSuggestions, { user: ownerId });
  });

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

  // ── Auth + addon gate ────────────────────────────────────────────────────

  it('DAWARICH-E2E-001: 401 without a session cookie', async () => {
    const res = await request(server).get('/api/integrations/dawarich/settings');
    expect(res.status).toBe(401);
  });

  it('DAWARICH-E2E-002: a session on a disabled addon gets 404 with the Dawarich label, not a 403 that confirms the route', async () => {
    isAddonEnabled.mockReturnValue(false);
    const res = await request(server).get('/api/integrations/dawarich/settings').set('Cookie', sessionCookie(ownerId));
    expect(res.status).toBe(404);
    expect(res.body).toEqual({ error: 'Dawarich addon is not enabled' });
  });

  it('DAWARICH-E2E-003: the addon gate beats the auth guard — no cookie and no addon is still 404, so an anonymous probe learns nothing', async () => {
    isAddonEnabled.mockReturnValue(false);
    const res = await request(server).get('/api/integrations/dawarich/suggestions');
    expect(res.status).toBe(404);
    expect(res.body).toEqual({ error: 'Dawarich addon is not enabled' });
  });

  it('DAWARICH-E2E-004: a disabled addon 404s the write routes too, and nothing is persisted', async () => {
    isAddonEnabled.mockReturnValue(false);
    const res = await request(server)
      .put('/api/integrations/dawarich/settings')
      .set('Cookie', sessionCookie(ownerId))
      .send({ url: 'https://dawarich.example', apiKey: 'secret' });
    expect(res.status).toBe(404);
    expect(await countRows(orm, DawarichConnections)).toBe(0);
  });

  it('DAWARICH-E2E-005: the addon flag is re-read per request — switching it back on reopens the route without a restart', async () => {
    isAddonEnabled.mockReturnValue(false);
    expect(
      (await request(server).get('/api/integrations/dawarich/settings').set('Cookie', sessionCookie(ownerId))).status,
    ).toBe(404);
    isAddonEnabled.mockReturnValue(true);
    expect(
      (await request(server).get('/api/integrations/dawarich/settings').set('Cookie', sessionCookie(ownerId))).status,
    ).toBe(200);
  });

  // ── Connection ───────────────────────────────────────────────────────────

  it('DAWARICH-E2E-010: GET settings for a user who has never connected answers the empty connection, with the poll defaulted on', async () => {
    const res = await request(server).get('/api/integrations/dawarich/settings').set('Cookie', sessionCookie(ownerId));
    expect(res.status).toBe(200);
    expect(res.body).toEqual({
      url: '',
      // Never the key, and not even a placeholder when there is nothing stored.
      apiKeyMasked: '',
      allowInsecureTls: false,
      // No row yet is a user who has not opened the card; the default there is
      // "poll once it is connected", not "off".
      syncEnabled: true,
      connected: false,
      lastSyncAt: null,
      lastSyncState: 'never',
      lastSyncError: null,
      capabilities: null,
    });
  });

  it('DAWARICH-E2E-011: PUT settings with an unparseable URL is a 400 and writes nothing', async () => {
    const res = await request(server)
      .put('/api/integrations/dawarich/settings')
      .set('Cookie', sessionCookie(ownerId))
      .send({ url: 'not a url', apiKey: 'secret' });

    expect(res.status).toBe(400);
    expect(res.body).toEqual({ error: 'Invalid URL' });
    // Crucially: the key is not stored on a rejected address either.
    expect(await countRows(orm, DawarichConnections)).toBe(0);
  });

  it('DAWARICH-E2E-012: PUT settings with a non-HTTP scheme is a 400 — file:// and friends never reach the fetch layer', async () => {
    const res = await request(server)
      .put('/api/integrations/dawarich/settings')
      .set('Cookie', sessionCookie(ownerId))
      .send({ url: 'file:///etc/passwd' });

    expect(res.status).toBe(400);
    expect(res.body).toEqual({ error: 'Only HTTP and HTTPS URLs are allowed' });
    expect(await countRows(orm, DawarichConnections)).toBe(0);
  });

  it('DAWARICH-E2E-013: PUT settings rejects a body the shared contract does not accept, before any of this runs', async () => {
    const res = await request(server)
      .put('/api/integrations/dawarich/settings')
      .set('Cookie', sessionCookie(ownerId))
      .send({ apiKey: 'secret' });

    expect(res.status).toBe(400);
    expect(res.body.error).toMatch(/^url: /);
  });

  it('DAWARICH-E2E-014: clearing the address saves the row, keeps the connection unconnected and persists the poll toggle', async () => {
    const put = await request(server)
      .put('/api/integrations/dawarich/settings')
      .set('Cookie', sessionCookie(ownerId))
      .send({ url: '', syncEnabled: false });
    expect(put.status).toBe(200);
    expect(put.body).toEqual({ success: true });

    const row = await findRow(orm, DawarichConnections, { user: ownerId });
    expect(row).toMatchObject({ url: null, api_key: null, sync_enabled: 0 });

    const res = await request(server).get('/api/integrations/dawarich/settings').set('Cookie', sessionCookie(ownerId));
    expect(res.body.connected).toBe(false);
    expect(res.body.syncEnabled).toBe(false);
    expect(res.body.apiKeyMasked).toBe('');
  });

  it('DAWARICH-E2E-015: DELETE settings answers 200 even when there was nothing to disconnect', async () => {
    const res = await request(server)
      .delete('/api/integrations/dawarich/settings')
      .set('Cookie', sessionCookie(ownerId));
    expect(res.status).toBe(200);
    expect(res.body).toEqual({ success: true });
  });

  it('DAWARICH-E2E-016: POST test with a blank key against a host other than the stored one answers not_connected and never dials out', async () => {
    // The stored key is the one thing this route must not carry to an address
    // the form just typed. The client stub throws on every call, so a probe
    // that did go out would surface as `unreachable` here rather than as the
    // refusal the form is meant to render.
    await insertRow(orm, DawarichConnections, {
      user: ownerId,
      url: 'https://dawarich.old.example',
      api_key: 'plain-legacy-key',
    });

    const res = await request(server)
      .post('/api/integrations/dawarich/test')
      .set('Cookie', sessionCookie(ownerId))
      .send({ url: 'https://dawarich.elsewhere.example' });

    expect(res.status).toBe(200);
    expect(res.body).toMatchObject({ connected: false, error: 'not_connected' });
    expect(res.body.errorDetail).toContain('https://dawarich.old.example');
    // And the stored connection is untouched by a test, as it always was.
    expect(await findRow(orm, DawarichConnections, { user: ownerId })).toMatchObject({
      url: 'https://dawarich.old.example',
      api_key: 'plain-legacy-key',
    });
  });

  // ── Suggestions ──────────────────────────────────────────────────────────

  it('DAWARICH-E2E-020: GET suggestions without a connection answers the envelope with connected:false — an empty list alone would read as "no stays"', async () => {
    const res = await request(server)
      .get('/api/integrations/dawarich/suggestions')
      .set('Cookie', sessionCookie(ownerId));
    expect(res.status).toBe(200);
    expect(res.body).toEqual({
      suggestions: [],
      connected: false,
      lastSyncAt: null,
      lastSyncState: 'never',
      lastSyncError: null,
    });
  });

  it('DAWARICH-E2E-021: an unknown state filter is a 400 rather than a silently unfiltered list', async () => {
    const res = await request(server)
      .get('/api/integrations/dawarich/suggestions?state=pending')
      .set('Cookie', sessionCookie(ownerId));
    expect(res.status).toBe(400);
    expect(res.body).toEqual({ error: 'state must be one of: new, accepted, dismissed' });
  });

  it('DAWARICH-E2E-022: a tripId that only starts with digits is a 400', async () => {
    const res = await request(server)
      .get('/api/integrations/dawarich/suggestions?tripId=12abc')
      .set('Cookie', sessionCookie(ownerId));
    expect(res.status).toBe(400);
    expect(res.body).toEqual({ error: 'Invalid tripId' });
  });

  // ── Cross-user isolation ─────────────────────────────────────────────────

  it("DAWARICH-E2E-030: another user's suggestion never appears in your own list", async () => {
    const mine = await seedSuggestion(ownerId, 'visit-mine-1', 'Gare du Nord');

    const res = await request(server)
      .get('/api/integrations/dawarich/suggestions')
      .set('Cookie', sessionCookie(ownerId));
    expect(res.status).toBe(200);
    const ids = res.body.suggestions.map((s: { id: number }) => s.id);
    expect(ids).toEqual([mine]);
    expect(ids).not.toContain(strangerSuggestionId);
    // And the row really is there for the other user, so this is isolation and
    // not an empty table.
    expect((await findRow(orm, DawarichVisitSuggestions, { id: strangerSuggestionId }))?.user_id).toBe(strangerId);
  });

  it("DAWARICH-E2E-031: PUT state on another user's suggestion is a 404 — the same answer a missing id gets, so nothing is enumerable", async () => {
    const res = await request(server)
      .put(`/api/integrations/dawarich/suggestions/${strangerSuggestionId}/state`)
      .set('Cookie', sessionCookie(ownerId))
      .send({ state: 'dismissed' });

    expect(res.status).toBe(404);
    expect(res.body).toEqual({ error: 'Suggestion not found' });
    expect((await findRow(orm, DawarichVisitSuggestions, { id: strangerSuggestionId }))?.state).toBe('new');

    const missing = await request(server)
      .put('/api/integrations/dawarich/suggestions/999999/state')
      .set('Cookie', sessionCookie(ownerId))
      .send({ state: 'dismissed' });
    expect(missing.status).toBe(404);
    expect(missing.body).toEqual(res.body);
  });

  it("DAWARICH-E2E-032: POST accept on another user's suggestion is a 404 with the domain's own code", async () => {
    const res = await request(server)
      .post(`/api/integrations/dawarich/suggestions/${strangerSuggestionId}/accept`)
      .set('Cookie', sessionCookie(ownerId))
      .send({ target: 'place', tripId: 1 });

    expect(res.status).toBe(404);
    expect(res.body).toEqual({ error: 'Suggestion not found', code: 'not_found' });
    expect(await findRow(orm, DawarichVisitSuggestions, { id: strangerSuggestionId })).toMatchObject({
      state: 'new',
      target: null,
    });
  });

  it('DAWARICH-E2E-033: your own suggestion is reachable through the same route, which is what makes the two 404s above meaningful', async () => {
    const mine = await seedSuggestion(ownerId, 'visit-mine-2', 'Musée d’Orsay');

    const res = await request(server)
      .put(`/api/integrations/dawarich/suggestions/${mine}/state`)
      .set('Cookie', sessionCookie(ownerId))
      .send({ state: 'dismissed' });

    expect(res.status).toBe(200);
    expect(res.body.id).toBe(mine);
    expect(res.body.state).toBe('dismissed');
    expect((await findRow(orm, DawarichVisitSuggestions, { id: mine }))?.state).toBe('dismissed');
  });

  // ── Bucket list and Atlas over MCP: the same services, the same answers ──

  const asUser = (userId: number) => ({ userId, scopes: null, isStaticToken: false }) as McpContext;
  const viaMcp = <T>(fn: (mcp: DawarichAtlasMcp) => Promise<T>) =>
    withRequestContext(app.get(MikroORM), () => fn(app.get(DawarichAtlasMcp)));
  const answerOf = (result: McpTextResult) => JSON.parse(result.content[0]?.text ?? '');

  it('DAWARICH-E2E-040: a wish ticked off over MCP is ticked off for REST, and only its owner can clear it', async () => {
    const wish = await makeBucketListItem(orm, ownerId, { name: 'Alhambra', lat: 37.176, lng: -3.588 });

    const confirmed = await viaMcp((mcp) =>
      mcp.confirmBucketVisits({ itemIds: [wish.id], visitedAt: '2024-04-02T10:00:00Z' }, asUser(ownerId)),
    );
    expect(answerOf(confirmed)).toEqual({ updated: 1 });
    const again = await request(server)
      .post('/api/integrations/dawarich/bucket-list/confirm')
      .set('Cookie', sessionCookie(ownerId))
      .send({ itemIds: [wish.id] });
    expect(again.status).toBe(200);
    expect(again.body).toEqual({ updated: 0 });
    expect(await findRow(orm, BucketList, { id: wish.id })).toMatchObject({
      visited_at: '2024-04-02T10:00:00Z',
      visited_source: 'dawarich',
    });

    const foreign = await viaMcp((mcp) => mcp.clearBucketVisit({ itemId: wish.id }, asUser(strangerId)));
    expect(foreign).toEqual({ content: [{ type: 'text', text: 'Bucket-list entry not found' }], isError: true });
    const foreignRest = await request(server)
      .delete(`/api/integrations/dawarich/bucket-list/${wish.id}/visit`)
      .set('Cookie', sessionCookie(strangerId));
    expect(foreignRest.status).toBe(404);
    expect(foreignRest.body).toEqual({ error: 'Bucket-list entry not found' });

    expect(answerOf(await viaMcp((mcp) => mcp.clearBucketVisit({ itemId: wish.id }, asUser(ownerId))))).toEqual({
      success: true,
    });
    expect(await findRow(orm, BucketList, { id: wish.id })).toMatchObject({ visited_at: null, visited_source: null });
  });

  it('DAWARICH-E2E-041: countries accepted over MCP land in the Atlas once, as REST then finds them', async () => {
    const marked = await viaMcp((mcp) => mcp.acceptAtlasCountries({ countryCodes: ['PT', 'es'] }, asUser(ownerId)));
    expect(answerOf(marked)).toEqual({ marked: 2 });

    const again = await request(server)
      .post('/api/integrations/dawarich/atlas/accept')
      .set('Cookie', sessionCookie(ownerId))
      .send({ countryCodes: ['PT', 'ES'] });
    expect(again.status).toBe(200);
    expect(again.body).toEqual({ marked: 0 });
    expect(await countRows(orm, VisitedCountries, { user: ownerId, source: 'dawarich' })).toBe(2);
  });

  it('DAWARICH-E2E-042: without a connection both reads refuse alike, and a backwards window is the route 400 before anything is asked', async () => {
    const scan = await request(server)
      .post('/api/integrations/dawarich/bucket-list/scan')
      .set('Cookie', sessionCookie(ownerId));
    expect(scan.status).toBe(400);
    expect(scan.body).toEqual({ error: 'Dawarich is not connected', code: 'not_connected' });
    expect(await viaMcp((mcp) => mcp.scanBucketList({}, asUser(ownerId)))).toEqual({
      content: [{ type: 'text', text: 'Dawarich is not connected' }],
      isError: true,
    });

    const window = { from: '2026-01-01T00:00:00Z', to: '2026-03-01T00:00:00Z' };
    const suggestions = await request(server)
      .get('/api/integrations/dawarich/atlas/suggestions')
      .query(window)
      .set('Cookie', sessionCookie(ownerId));
    expect(suggestions.status).toBe(400);
    expect(suggestions.body).toEqual({ error: 'Dawarich is not connected', code: 'not_connected' });
    expect(await viaMcp((mcp) => mcp.suggestAtlasCountries(window, asUser(ownerId)))).toEqual({
      content: [{ type: 'text', text: 'Dawarich is not connected' }],
      isError: true,
    });

    const backwards = { from: window.to, to: window.from };
    const refused = await request(server)
      .get('/api/integrations/dawarich/atlas/suggestions')
      .query(backwards)
      .set('Cookie', sessionCookie(ownerId));
    expect(refused.status).toBe(400);
    expect(refused.body).toEqual({ error: 'to must be after from' });
    const thrown = await viaMcp((mcp) => mcp.suggestAtlasCountries(backwards, asUser(ownerId))).then(
      () => undefined,
      (err: unknown) => err,
    );
    expect(thrown).toMatchObject({ status: 400, publicMessage: 'to must be after from' });
    // The tool call answers with the route's sentence: the registry maps the refusal to an error result.
    expect(trekMcpErrorMapper(thrown)).toEqual({
      content: [{ type: 'text', text: 'to must be after from' }],
      isError: true,
    });
  });

  it('DAWARICH-E2E-043: an instance that does not answer ends a scan after one lookup: the route 502 and the same sentence over MCP', async () => {
    await insertRow(orm, DawarichConnections, {
      user: ownerId,
      url: 'https://dawarich.example',
      api_key: 'plain-legacy-key',
    });
    await Promise.all(
      ['Alhambra', 'Petra'].map((name) => makeBucketListItem(orm, ownerId, { name, lat: 37.176, lng: -3.588 })),
    );
    const findVisitsNear = vi.mocked(app.get(DawarichClient).findVisitsNear);
    findVisitsNear.mockClear();
    const down = () => new DawarichError('unreachable', 'Could not reach Dawarich', undefined, 'ETIMEDOUT');
    findVisitsNear.mockRejectedValueOnce(down()).mockRejectedValueOnce(down());

    const scan = await request(server)
      .post('/api/integrations/dawarich/bucket-list/scan')
      .set('Cookie', sessionCookie(ownerId));
    expect(scan.status).toBe(502);
    expect(scan.body).toEqual({ error: 'Could not reach Dawarich', code: 'unreachable', detail: 'ETIMEDOUT' });
    expect(await viaMcp((mcp) => mcp.scanBucketList({}, asUser(ownerId)))).toEqual({
      content: [{ type: 'text', text: 'Could not reach Dawarich' }],
      isError: true,
    });
    // One lookup per channel, not one per wish.
    expect(findVisitsNear).toHaveBeenCalledTimes(2);
    await deleteRows(orm, BucketList, { user: ownerId });
  });
});