/**
 * Parity guards for the Plan 3c Task 0a async sweep, extended by Task 0b.
 *
 * `canAccessTrip`, `isOwner`, `rosterUserIds` and `getPlaceWithTags` went
 * from synchronous to `async` in Task 0a (with every caller updated to
 * `await` them), still delegating to `src/db/database.ts`'s free functions.
 * Task 0b deleted those free functions and moved the bodies onto
 * `TripsRepository.findAccessible`/`isOwner`, `TripMembersRepository
 * .rosterUserIds` and `PlacesRepository.findWithTagsAndRatings` — these four
 * tests still drive a REAL guarded route through the real `buildApp()` DI
 * graph, one per primitive, as owner / member / non-member / anonymous, and
 * still pin the legacy status + body, but now against the real repository
 * path rather than a stand-in.
 */
import { buildApp } from '../../src/bootstrap';
import { db as testDb } from '../../src/db/database';
import { Addons } from '../../src/db/entities/Addons.entity';
import { Categories } from '../../src/db/entities/Categories.entity';
import { Trips } from '../../src/db/entities/Trips.entity';
import { closeMcpSessions } from '../../src/mcp/index';
import { authCookie, generateToken } from '../helpers/auth';
import {
  createUser,
  createTrip,
  createDay,
  createPlace,
  addTripMember,
  createDayAssignment,
} from '../helpers/factories';
import type { FactoryOrm } from '../helpers/factories/context';
import { findRow, updateRows } from '../helpers/factories/rows';
import { resetTestDb, resetRateLimits } from '../helpers/test-db';
import { MikroORM } from '@mikro-orm/core';
import type { INestApplication } from '@nestjs/common';

import type { Application } from 'express';
import request from 'supertest';
import { describe, it, expect, vi, beforeAll, beforeEach, afterAll } from 'vitest';

// task-0a-review F4: this mock no longer intercepts any of the four
// primitives — `db/database.ts` holds none of their bodies any more, so
// `buildDbMock`'s own `canAccessTrip`/`isOwner`/`getPlaceWithTags`
// properties are dead code for this file's purposes. It stays only for what
// every other integration/e2e/WS suite in this program uses it for: an
// isolated snapshot db that `getRawConnection`/`db` swap the shared
// better-sqlite3 handle to, which the REAL `MikroORM` binds to underneath
// (`db/orm-driver.ts`) — so `TripsRepository`/`TripMembersRepository`
// /`PlacesRepository` read the SAME rows this file seeds through `testDb`.
vi.mock('../../src/db/database', async () => {
  const { createSnapshotTestDb, buildDbMock } = await import('../helpers/db-mock');
  return buildDbMock(createSnapshotTestDb());
});

let nestApp: INestApplication;
let app: Application;
let orm: FactoryOrm;

beforeAll(async () => {
  nestApp = await buildApp();
  app = nestApp.getHttpAdapter().getInstance();
  orm = nestApp.get(MikroORM);
});
beforeEach(async () => {
  resetTestDb(testDb);
  await resetRateLimits(nestApp);
});
afterAll(async () => {
  closeMcpSessions();
  await nestApp.close();
  testDb.close();
});

// ─────────────────────────────────────────────────────────────────────────
// canAccessTrip — TripAccessGuard, exercised by GET /api/trips/:tripId/days
// ─────────────────────────────────────────────────────────────────────────

describe('canAccessTrip (async) — TripAccessGuard on GET /api/trips/:tripId/days', () => {
  it('PRIM-CAT-001 — owner: 200 with the trip days', async () => {
    const { user: owner } = createUser(testDb);
    const trip = createTrip(testDb, owner.id, { start_date: '2026-06-01', end_date: '2026-06-02' });

    const res = await request(app).get(`/api/trips/${trip.id}/days`).set('Cookie', authCookie(owner.id));
    expect(res.status).toBe(200);
    expect(res.body.days).toHaveLength(2);
  });

  it('PRIM-CAT-002 — member: 200 with the trip days', async () => {
    const { user: owner } = createUser(testDb);
    const { user: member } = createUser(testDb);
    const trip = createTrip(testDb, owner.id, { start_date: '2026-06-01', end_date: '2026-06-01' });
    addTripMember(testDb, trip.id, member.id);

    const res = await request(app).get(`/api/trips/${trip.id}/days`).set('Cookie', authCookie(member.id));
    expect(res.status).toBe(200);
    expect(res.body.days).toHaveLength(1);
  });

  it('PRIM-CAT-003 — non-member: 404 { error: "Trip not found" } — never 403 (never confirms the id exists)', async () => {
    const { user: owner } = createUser(testDb);
    const { user: stranger } = createUser(testDb);
    const trip = createTrip(testDb, owner.id);

    const res = await request(app).get(`/api/trips/${trip.id}/days`).set('Cookie', authCookie(stranger.id));
    expect(res.status).toBe(404);
    expect(res.body).toEqual({ error: 'Trip not found' });
  });

  it('PRIM-CAT-004 — anonymous: 401', async () => {
    const { user: owner } = createUser(testDb);
    const trip = createTrip(testDb, owner.id);

    const res = await request(app).get(`/api/trips/${trip.id}/days`);
    expect(res.status).toBe(401);
  });
});

// ─────────────────────────────────────────────────────────────────────────
// isOwner — the delete_trip MCP tool (its only caller anywhere)
// ─────────────────────────────────────────────────────────────────────────

describe('isOwner (async) — the delete_trip MCP tool', () => {
  async function mcpSession(userId: number): Promise<string> {
    const res = await request(app)
      .post('/mcp')
      .set('Authorization', `Bearer ${generateToken(userId)}`)
      .set('Accept', 'application/json, text/event-stream')
      .send({
        jsonrpc: '2.0',
        method: 'initialize',
        id: 1,
        params: { protocolVersion: '2024-11-05', capabilities: {}, clientInfo: { name: 'test', version: '1' } },
      });
    expect(res.status).toBe(200);
    const sessionId = res.headers['mcp-session-id'];
    expect(sessionId).toBeTruthy();
    return sessionId as string;
  }

  function deleteTripBody(tripId: number) {
    return { jsonrpc: '2.0', method: 'tools/call', id: 2, params: { name: 'delete_trip', arguments: { tripId } } };
  }

  /** /mcp answers as SSE; the JSON-RPC payload rides a `data:` line. */
  function toolResult(text: string): { isError?: boolean; content?: { type: string; text: string }[] } {
    const line = text.split('\n').find((l) => l.startsWith('data:'));
    if (!line) throw new Error(`no SSE data frame in: ${text.slice(0, 200)}`);
    return (
      (
        JSON.parse(line.slice('data:'.length).trim()) as {
          result?: { isError?: boolean; content?: { type: string; text: string }[] };
        }
      ).result ?? {}
    );
  }

  beforeEach(async () => {
    await updateRows(orm, Addons, { id: 'mcp' }, { enabled: true });
  });

  it('PRIM-ISOWN-001 — owner: 200, deletes the trip', async () => {
    const { user: owner } = createUser(testDb);
    const trip = createTrip(testDb, owner.id);
    const sessionId = await mcpSession(owner.id);

    const res = await request(app)
      .post('/mcp')
      .set('Authorization', `Bearer ${generateToken(owner.id)}`)
      .set('mcp-session-id', sessionId)
      .set('Accept', 'application/json, text/event-stream')
      .send(deleteTripBody(trip.id));

    expect(res.status).toBe(200);
    const result = toolResult(res.text);
    expect(result.isError).toBeFalsy();
    expect(JSON.parse(result.content?.[0]?.text ?? '{}')).toEqual({ success: true, tripId: trip.id });
    expect(await findRow(orm, Trips, { id: trip.id })).toBeNull();
  });

  /**
   * Plan 3c Task 0b (R9): `isOwner`'s only real caller anywhere is this MCP
   * tool (inventory §0d), and `TripsService.isOwner` → `DatabaseService
   * .isOwner` is now `TripsRepository.isOwner` underneath — a repository
   * read reached through the MCP transport's request context (`nest-mcp
   * /registry.ts`'s `attachTool` note: bootstrap.ts's pathless
   * `mikroOrmRequestContext` middleware forks a context for every `/mcp`
   * request, same as any other Nest route). PRIM-ISOWN-001 above already
   * proves the happy path (the trip is actually deleted, which requires the
   * repository read to succeed); this is the explicit MCP-CTX-style structural assertion
   * (`mcp.test.ts`'s MCP-CTX-001/002 pattern) that no missing-context error
   * was swallowed along the way.
   */
  it('PRIM-ISOWN-005 — the repository read inside isOwner runs inside the /mcp request context (MCP-CTX style, no cannotUseGlobalContext)', async () => {
    const errSpy = vi.spyOn(console, 'error').mockImplementation(() => {});
    try {
      const { user: owner } = createUser(testDb);
      const trip = createTrip(testDb, owner.id);
      const sessionId = await mcpSession(owner.id);

      const res = await request(app)
        .post('/mcp')
        .set('Authorization', `Bearer ${generateToken(owner.id)}`)
        .set('mcp-session-id', sessionId)
        .set('Accept', 'application/json, text/event-stream')
        .send(deleteTripBody(trip.id));
      expect(res.status).toBe(200);

      const suspicious = errSpy.mock.calls
        .map((args) => args.map(String).join(' '))
        .filter((line) => /cannotUseGlobalContext|global EntityManager/i.test(line));
      expect(suspicious).toEqual([]);
    } finally {
      errSpy.mockRestore();
    }
  });

  it('PRIM-ISOWN-002 — member (not owner): refused with the same "no access" message as a stranger, trip untouched', async () => {
    const { user: owner } = createUser(testDb);
    const { user: member } = createUser(testDb);
    const trip = createTrip(testDb, owner.id);
    addTripMember(testDb, trip.id, member.id);
    const sessionId = await mcpSession(member.id);

    const res = await request(app)
      .post('/mcp')
      .set('Authorization', `Bearer ${generateToken(member.id)}`)
      .set('mcp-session-id', sessionId)
      .set('Accept', 'application/json, text/event-stream')
      .send(deleteTripBody(trip.id));

    expect(res.status).toBe(200);
    const result = toolResult(res.text);
    expect(result.isError).toBe(true);
    expect(result.content?.[0]?.text).toBe('Trip not found or access denied.');
    expect(await findRow(orm, Trips, { id: trip.id })).not.toBeNull();
  });

  it('PRIM-ISOWN-003 — non-member/stranger: the identical refusal isOwner gives a member, trip untouched', async () => {
    const { user: owner } = createUser(testDb);
    const { user: stranger } = createUser(testDb);
    const trip = createTrip(testDb, owner.id);
    const sessionId = await mcpSession(stranger.id);

    const res = await request(app)
      .post('/mcp')
      .set('Authorization', `Bearer ${generateToken(stranger.id)}`)
      .set('mcp-session-id', sessionId)
      .set('Accept', 'application/json, text/event-stream')
      .send(deleteTripBody(trip.id));

    expect(res.status).toBe(200);
    const result = toolResult(res.text);
    expect(result.isError).toBe(true);
    expect(result.content?.[0]?.text).toBe('Trip not found or access denied.');
    expect(await findRow(orm, Trips, { id: trip.id })).not.toBeNull();
  });

  it('PRIM-ISOWN-004 — anonymous: 401, no session established', async () => {
    const { user: owner } = createUser(testDb);
    const trip = createTrip(testDb, owner.id);

    const res = await request(app).post('/mcp').send(deleteTripBody(trip.id));
    expect(res.status).toBe(401);
  });
});

// ─────────────────────────────────────────────────────────────────────────
// rosterUserIds — PUT /api/trips/:tripId/assignments/:id/participants
// ─────────────────────────────────────────────────────────────────────────

describe('rosterUserIds (async) — PUT .../assignments/:id/participants', () => {
  it('PRIM-ROSTER-001 — owner: 200, off-roster ids are dropped silently (no 400)', async () => {
    const { user: owner } = createUser(testDb);
    const { user: outsider } = createUser(testDb);
    const trip = createTrip(testDb, owner.id);
    const day = createDay(testDb, trip.id);
    const place = createPlace(testDb, trip.id);
    const assignment = createDayAssignment(testDb, day.id, place.id);

    const res = await request(app)
      .put(`/api/trips/${trip.id}/assignments/${assignment.id}/participants`)
      .set('Cookie', authCookie(owner.id))
      .send({ user_ids: [owner.id, outsider.id] });

    expect(res.status).toBe(200);
    expect(res.body.participants.map((p: { user_id: number }) => p.user_id).sort()).toEqual([owner.id]);
  });

  it('PRIM-ROSTER-002 — member with edit rights: 200, keeps only roster ids (owner + member)', async () => {
    const { user: owner } = createUser(testDb);
    const { user: member } = createUser(testDb);
    const { user: outsider } = createUser(testDb);
    const trip = createTrip(testDb, owner.id);
    addTripMember(testDb, trip.id, member.id);
    const day = createDay(testDb, trip.id);
    const place = createPlace(testDb, trip.id);
    const assignment = createDayAssignment(testDb, day.id, place.id);

    const res = await request(app)
      .put(`/api/trips/${trip.id}/assignments/${assignment.id}/participants`)
      .set('Cookie', authCookie(member.id))
      .send({ user_ids: [owner.id, member.id, outsider.id] });

    expect(res.status).toBe(200);
    expect(
      res.body.participants.map((p: { user_id: number }) => p.user_id).sort((a: number, b: number) => a - b),
    ).toEqual([owner.id, member.id].sort((a, b) => a - b));
  });

  it('PRIM-ROSTER-003 — non-member: 404 { error: "Trip not found" }, guard refuses before rosterUserIds runs', async () => {
    const { user: owner } = createUser(testDb);
    const { user: stranger } = createUser(testDb);
    const trip = createTrip(testDb, owner.id);
    const day = createDay(testDb, trip.id);
    const place = createPlace(testDb, trip.id);
    const assignment = createDayAssignment(testDb, day.id, place.id);

    const res = await request(app)
      .put(`/api/trips/${trip.id}/assignments/${assignment.id}/participants`)
      .set('Cookie', authCookie(stranger.id))
      .send({ user_ids: [owner.id] });

    expect(res.status).toBe(404);
    expect(res.body).toEqual({ error: 'Trip not found' });
  });

  it('PRIM-ROSTER-004 — anonymous: 401', async () => {
    const { user: owner } = createUser(testDb);
    const trip = createTrip(testDb, owner.id);
    const day = createDay(testDb, trip.id);
    const place = createPlace(testDb, trip.id);
    const assignment = createDayAssignment(testDb, day.id, place.id);

    const res = await request(app)
      .put(`/api/trips/${trip.id}/assignments/${assignment.id}/participants`)
      .send({ user_ids: [owner.id] });

    expect(res.status).toBe(401);
  });
});

// ─────────────────────────────────────────────────────────────────────────
// getPlaceWithTags — GET /api/trips/:tripId/places/:id
// ─────────────────────────────────────────────────────────────────────────

describe('getPlaceWithTags (async) — GET /api/trips/:tripId/places/:id', () => {
  it('PRIM-GPWT-001 — owner: 200 with the hydrated place (category/tags/ratings shape)', async () => {
    const { user: owner } = createUser(testDb);
    const trip = createTrip(testDb, owner.id);
    // createPlace defaults category_id to the first seeded category when no
    // override is given (tests/helpers/factories.ts) — read back whatever it
    // actually assigned rather than assuming none, so this pins the real
    // production shape instead of a factory default that happens to be null.
    const place = createPlace(testDb, trip.id, { name: 'Eiffel Tower' });
    const category = place.category_id ? await findRow(orm, Categories, { id: place.category_id }) : null;
    const expectedCategory = category
      ? { id: category.id, name: category.name, color: category.color, icon: category.icon }
      : null;

    const res = await request(app).get(`/api/trips/${trip.id}/places/${place.id}`).set('Cookie', authCookie(owner.id));
    expect(res.status).toBe(200);
    // Plan 3c Task 0b: `getPlaceWithTags` is `PlacesRepository
    // .findWithTagsAndRatings` now, reached for real (this file's `vi.mock`
    // of `src/db/database` only swaps the underlying connection to an
    // isolated snapshot db — see the top-of-file note — it no longer stands
    // in for the primitive itself, which db/database.ts doesn't hold any
    // more). The full production shape, including the ratings aggregate the
    // old mocked stand-in omitted, is asserted directly rather than only a
    // subset.
    expect(res.body.place).toMatchObject({
      id: place.id,
      name: 'Eiffel Tower',
      category: expectedCategory,
      tags: [],
      ratings: [],
      rating_avg: null,
      rating_count: 0,
    });
  });

  it('PRIM-GPWT-002 — member: 200 with the same hydrated place', async () => {
    const { user: owner } = createUser(testDb);
    const { user: member } = createUser(testDb);
    const trip = createTrip(testDb, owner.id);
    addTripMember(testDb, trip.id, member.id);
    const place = createPlace(testDb, trip.id);

    const res = await request(app).get(`/api/trips/${trip.id}/places/${place.id}`).set('Cookie', authCookie(member.id));
    expect(res.status).toBe(200);
    expect(res.body.place.id).toBe(place.id);
  });

  it('PRIM-GPWT-003 — non-member: 404 { error: "Trip not found" } from the guard, before getPlaceWithTags runs', async () => {
    const { user: owner } = createUser(testDb);
    const { user: stranger } = createUser(testDb);
    const trip = createTrip(testDb, owner.id);
    const place = createPlace(testDb, trip.id);

    const res = await request(app)
      .get(`/api/trips/${trip.id}/places/${place.id}`)
      .set('Cookie', authCookie(stranger.id));
    expect(res.status).toBe(404);
    expect(res.body).toEqual({ error: 'Trip not found' });
  });

  it('PRIM-GPWT-004 — anonymous: 401', async () => {
    const { user: owner } = createUser(testDb);
    const trip = createTrip(testDb, owner.id);
    const place = createPlace(testDb, trip.id);

    const res = await request(app).get(`/api/trips/${trip.id}/places/${place.id}`);
    expect(res.status).toBe(401);
  });
});