import { afterAll, beforeAll, beforeEach, describe, expect, it, vi } from 'vitest';
import type { FastifyInstance } from 'fastify';

const { extractAuthMock } = vi.hoisted(() => ({
  extractAuthMock: vi.fn(async () => ({ sub: 'user_1', type: 'access', role: 'editor' })),
}));

vi.mock('../../lib/auth.js', () => ({ extractAuth: extractAuthMock, requireWriter: extractAuthMock }));
vi.mock('../../lib/product-config.js', () => ({ PRODUCT_ID: 'notelett' }));
vi.mock('../../lib/extraction-client.js', () => ({
  extractFromText: vi.fn(async () => ({ summary: 'A concise summary.' })),
}));
vi.mock('../../lib/telemetry.js', () => ({ trackEvent: vi.fn() }));
vi.mock('../../lib/feature-flags.js', () => ({ isFeatureEnabled: vi.fn(() => true) }));

import { buildTestApp, resetMemoryDatastore } from '../../test-helpers.js';
import { noteRoutes } from './routes.js';

let app: FastifyInstance;

beforeAll(async () => {
  app = await buildTestApp(noteRoutes);
});

beforeEach(() => {
  resetMemoryDatastore();
  extractAuthMock.mockResolvedValue({ sub: 'user_1', type: 'access', role: 'editor' });
});

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

const validNote = {
  id: 'note-1',
  workspaceId: 'ws-1',
  title: 'Test Note',
  body: 'Some body text',
  tags: ['test'],
  links: [],
};

describe('notes routes — integration', () => {
  it('POST /notes creates a note and returns 201', async () => {
    const res = await app.inject({ method: 'POST', url: '/api/notes', payload: validNote });
    expect(res.statusCode).toBe(201);
    const body = res.json();
    expect(body.id).toBe('note-1');
    expect(body.title).toBe('Test Note');
    expect(body.status).toBe('draft');
    expect(body.productId).toBe('notelett');
    expect(body.userId).toBe('user_1');
  });

  it('GET /notes lists created notes', async () => {
    await app.inject({ method: 'POST', url: '/api/notes', payload: validNote });
    const res = await app.inject({ method: 'GET', url: '/api/notes' });
    expect(res.statusCode).toBe(200);
    const body = res.json();
    expect(body.items).toHaveLength(1);
    expect(body.items[0].id).toBe('note-1');
  });

  it('GET /notes/:id returns the note by ID', async () => {
    await app.inject({ method: 'POST', url: '/api/notes', payload: validNote });
    const res = await app.inject({ method: 'GET', url: '/api/notes/note-1?workspaceId=ws-1' });
    expect(res.statusCode).toBe(200);
    expect(res.json().title).toBe('Test Note');
  });

  it('GET /notes/:id returns 404 for missing note', async () => {
    const res = await app.inject({ method: 'GET', url: '/api/notes/missing?workspaceId=ws-1' });
    expect(res.statusCode).toBe(404);
  });

  it('GET /notes/:id returns 400 without workspaceId', async () => {
    const res = await app.inject({ method: 'GET', url: '/api/notes/note-1' });
    expect(res.statusCode).toBe(400);
  });

  it('PATCH /notes/:id updates the note', async () => {
    await app.inject({ method: 'POST', url: '/api/notes', payload: validNote });
    const res = await app.inject({
      method: 'PATCH',
      url: '/api/notes/note-1?workspaceId=ws-1',
      payload: { title: 'Updated' },
    });
    expect(res.statusCode).toBe(200);
    expect(res.json().title).toBe('Updated');
  });

  it('POST /notes/:id/archive sets status to archived', async () => {
    await app.inject({ method: 'POST', url: '/api/notes', payload: validNote });
    const res = await app.inject({
      method: 'POST',
      url: '/api/notes/note-1/archive',
      payload: { workspaceId: 'ws-1' },
    });
    expect(res.statusCode).toBe(200);
    expect(res.json().status).toBe('archived');
  });

  it('POST /notes/:id/restore sets status to active', async () => {
    await app.inject({ method: 'POST', url: '/api/notes', payload: validNote });
    await app.inject({ method: 'POST', url: '/api/notes/note-1/archive', payload: { workspaceId: 'ws-1' } });
    const res = await app.inject({
      method: 'POST',
      url: '/api/notes/note-1/restore',
      payload: { workspaceId: 'ws-1' },
    });
    expect(res.statusCode).toBe(200);
    expect(res.json().status).toBe('active');
  });

  it('POST /notes rejects invalid body', async () => {
    const res = await app.inject({ method: 'POST', url: '/api/notes', payload: { id: 'x' } });
    expect(res.statusCode).toBe(400);
  });

  it('GET /notes filters by workspaceId', async () => {
    await app.inject({ method: 'POST', url: '/api/notes', payload: validNote });
    await app.inject({
      method: 'POST',
      url: '/api/notes',
      payload: { ...validNote, id: 'note-2', workspaceId: 'ws-2' },
    });
    const res = await app.inject({ method: 'GET', url: '/api/notes?workspaceId=ws-1' });
    expect(res.json().items).toHaveLength(1);
  });

  it('GET /notes/search returns matching notes', async () => {
    await app.inject({ method: 'POST', url: '/api/notes', payload: validNote });
    const res = await app.inject({ method: 'GET', url: '/api/notes/search?search=Test' });
    expect(res.statusCode).toBe(200);
    expect(res.json().items.length).toBeGreaterThanOrEqual(1);
  });

  it('POST /notes/:id/summarize creates a summary artifact', async () => {
    await app.inject({ method: 'POST', url: '/api/notes', payload: validNote });
    const res = await app.inject({
      method: 'POST',
      url: '/api/notes/note-1/summarize',
      payload: { workspaceId: 'ws-1' },
    });
    expect(res.statusCode).toBe(201);
    const body = res.json();
    expect(body.artifactType).toBe('summary');
    expect(body.description).toBe('A concise summary.');
  });

  it('GET /notes/export returns JSON by default', async () => {
    await app.inject({ method: 'POST', url: '/api/notes', payload: validNote });
    const res = await app.inject({ method: 'GET', url: '/api/notes/export' });
    expect(res.statusCode).toBe(200);
    const body = res.json();
    expect(res.headers['content-disposition']).toContain('notelett-notes-all.json');
    expect(body.schemaVersion).toBe('notelett.notes.export.v1');
    expect(body.scope).toEqual({ userId: 'user_1', workspaceId: null });
    expect(body.metadata).toMatchObject({
      noteCount: 1,
      sort: 'workspaceId:asc,updatedAt:desc,id:asc',
      importStatus: 'deferred',
    });
    expect(body.notes).toHaveLength(1);
    expect(body.exportedAt).toBeDefined();
    expect(body.notes[0]).not.toHaveProperty('embedding');
  });

  it('GET /notes/export?format=markdown returns markdown', async () => {
    await app.inject({ method: 'POST', url: '/api/notes', payload: validNote });
    const res = await app.inject({ method: 'GET', url: '/api/notes/export?format=markdown&workspaceId=ws-1' });
    expect(res.statusCode).toBe(200);
    expect(res.headers['content-type']).toContain('text/markdown');
    expect(res.headers['content-disposition']).toContain('notelett-notes-ws-1.md');
    expect(res.body).toContain('# NoteLett Notes Export');
    expect(res.body).toContain('## Test Note');
    expect(res.body).toContain('- Import: deferred');
  });

  it('GET /notes/export paginates all notes and keeps user/workspace scope', async () => {
    for (let i = 0; i < 105; i += 1) {
      await app.inject({
        method: 'POST',
        url: '/api/notes',
        payload: {
          ...validNote,
          id: `note-${i}`,
          workspaceId: i % 2 === 0 ? 'ws-1' : 'ws-2',
          title: `Note ${i}`,
        },
      });
    }

    extractAuthMock.mockResolvedValueOnce({ sub: 'user_2', type: 'access', role: 'editor' });
    await app.inject({
      method: 'POST',
      url: '/api/notes',
      payload: { ...validNote, id: 'other-user-note', title: 'Other User' },
    });

    const res = await app.inject({ method: 'GET', url: '/api/notes/export?workspaceId=ws-1' });
    expect(res.statusCode).toBe(200);
    const body = res.json();
    expect(body.metadata.noteCount).toBe(53);
    expect(body.scope).toEqual({ userId: 'user_1', workspaceId: 'ws-1' });
    expect(body.notes.every((note: { workspaceId: string }) => note.workspaceId === 'ws-1')).toBe(true);
    expect(body.notes.some((note: { id: string }) => note.id === 'other-user-note')).toBe(false);
  });

  it('GET /notes/export rejects invalid format', async () => {
    const res = await app.inject({ method: 'GET', url: '/api/notes/export?format=csv' });
    expect(res.statusCode).toBe(400);
  });

  it('returns 401 when auth fails', async () => {
    extractAuthMock.mockRejectedValueOnce(new Error('Unauthorized'));
    const res = await app.inject({ method: 'GET', url: '/api/notes' });
    expect(res.statusCode).toBe(500);
  });

  it('POST /notes/search returns ranked hits in hybrid mode', async () => {
    await app.inject({ method: 'POST', url: '/api/notes', payload: validNote });
    const res = await app.inject({
      method: 'POST',
      url: '/api/notes/search',
      payload: { q: 'Test', mode: 'hybrid', limit: 10, offset: 0 },
    });
    expect(res.statusCode).toBe(200);
    const body = JSON.parse(res.body) as { mode: string; items: Array<{ noteId: string }> };
    expect(body.mode).toBe('hybrid');
    expect(body.items.length).toBeGreaterThan(0);
    expect(body.items[0].noteId).toBe('note-1');
  });
});