import { INestApplication } from '@nestjs/common';
import * as bcrypt from 'bcryptjs';
import request from 'supertest';
import { App } from 'supertest/types';
import { PrismaService } from '../src/prisma/prisma.service';
import { createTestApp } from './utils/create-test-app';
import { login } from './utils/api';

interface CreatedKeyBody {
  apiKey: {
    id: string;
    name: string;
    prefix: string;
    scopes: string[];
    revokedAt: string | null;
  };
  token: string;
}

/**
 * Read-only API keys for machine access (the shop sync): shown once, stored
 * only as a hash, limited to their scopes, revocable.
 */
describe('API keys (e2e)', () => {
  let app: INestApplication<App>;
  let prisma: PrismaService;
  const suffix = `${Date.now()}-${Math.round(Math.random() * 1e6)}`;
  const password = 'SuperSecret123!';
  let adminToken: string;
  let staffToken: string;

  const server = () => app.getHttpServer();

  function createKey(body: Record<string, unknown>) {
    return request(server())
      .post('/api/v1/api-keys')
      .set('Authorization', `Bearer ${adminToken}`)
      .send(body);
  }

  beforeAll(async () => {
    app = await createTestApp();
    prisma = app.get(PrismaService);
    const passwordHash = await bcrypt.hash(password, 12);
    await prisma.user.create({
      data: {
        email: `keys-admin-${suffix}@example.com`,
        passwordHash,
        name: 'Admin',
        role: { connect: { key: 'ADMIN' } },
      },
    });
    await prisma.user.create({
      data: {
        email: `keys-staff-${suffix}@example.com`,
        passwordHash,
        name: 'Staff',
        role: { connect: { key: 'STAFF' } },
      },
    });
    adminToken = (
      await login(app, `keys-admin-${suffix}@example.com`, password)
    ).accessToken;
    staffToken = (
      await login(app, `keys-staff-${suffix}@example.com`, password)
    ).accessToken;
  });

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

  it('shows the key once and stores only a hash', async () => {
    const response = await createKey({
      name: `Wabenhain ${suffix}`,
      scopes: ['shop-sync:read'],
    }).expect(201);
    const body = response.body as CreatedKeyBody;

    expect(body.token).toMatch(/^ack_[a-z0-9]{8}_[A-Za-z0-9_-]{43}$/);
    expect(body.token.startsWith(body.apiKey.prefix)).toBe(true);
    expect(JSON.stringify(body.apiKey)).not.toContain(body.token);

    const stored = await prisma.apiKey.findUniqueOrThrow({
      where: { id: body.apiKey.id },
    });
    expect(stored.keyHash).not.toContain(body.token);

    const list = await request(server())
      .get('/api/v1/api-keys')
      .set('Authorization', `Bearer ${adminToken}`)
      .expect(200);
    const raw = JSON.stringify(list.body);
    expect(raw).not.toContain(body.token);
    expect(raw).not.toContain('keyHash');
  });

  it('refuses a new key with both shop scopes', async () => {
    const response = await createKey({
      name: `Combined ${suffix}`,
      scopes: ['shop-sync:read', 'shop-sync:write'],
    }).expect(400);
    expect(JSON.stringify(response.body)).toContain('getrennte Schlüssel');
  });

  it('refuses a new key with more than one scope', async () => {
    const response = await createKey({
      name: `Two reads ${suffix}`,
      scopes: ['shop-sync:read', 'erp-inventory:read'],
    }).expect(400);
    expect(JSON.stringify(response.body)).toContain('nur eine Berechtigung');
  });

  it('lets a key read exactly what its scopes allow', async () => {
    const { token } = (
      await createKey({ name: `Scope ${suffix}`, scopes: ['shop-sync:read'] })
    ).body as CreatedKeyBody;

    await request(server())
      .get('/api/v1/shop-sync')
      .set('Authorization', `Bearer ${token}`)
      .expect(200);
    // Not a user: no other data, no user-only routes.
    await request(server())
      .get('/api/v1/harvests')
      .set('Authorization', `Bearer ${token}`)
      .expect(403);
    await request(server())
      .get('/api/v1/auth/me')
      .set('Authorization', `Bearer ${token}`)
      .expect(403);
  });

  it('records when a key was last used', async () => {
    const created = (
      await createKey({ name: `Used ${suffix}`, scopes: ['shop-sync:read'] })
    ).body as CreatedKeyBody;
    await request(server())
      .get('/api/v1/shop-sync')
      .set('Authorization', `Bearer ${created.token}`)
      .expect(200);
    const stored = await prisma.apiKey.findUniqueOrThrow({
      where: { id: created.apiKey.id },
    });
    expect(stored.lastUsedAt).not.toBeNull();
  });

  it('stops working immediately once revoked', async () => {
    const created = (
      await createKey({ name: `Revoke ${suffix}`, scopes: ['shop-sync:read'] })
    ).body as CreatedKeyBody;
    await request(server())
      .post(`/api/v1/api-keys/${created.apiKey.id}/revoke`)
      .set('Authorization', `Bearer ${adminToken}`)
      .expect(201);
    await request(server())
      .get('/api/v1/shop-sync')
      .set('Authorization', `Bearer ${created.token}`)
      .expect(401);
  });

  it('rejects an expired key', async () => {
    const created = (
      await createKey({
        name: `Expired ${suffix}`,
        scopes: ['shop-sync:read'],
        expiresInDays: 1,
      })
    ).body as CreatedKeyBody;
    await prisma.apiKey.update({
      where: { id: created.apiKey.id },
      data: { expiresAt: new Date(Date.now() - 1000) },
    });
    await request(server())
      .get('/api/v1/shop-sync')
      .set('Authorization', `Bearer ${created.token}`)
      .expect(401);
  });

  it('rejects unknown and tampered keys', async () => {
    const created = (
      await createKey({ name: `Tamper ${suffix}`, scopes: ['shop-sync:read'] })
    ).body as CreatedKeyBody;
    const tampered = `${created.token.slice(0, 20)}${created.token[20] === 'A' ? 'B' : 'A'}${created.token.slice(21)}`;
    await request(server())
      .get('/api/v1/shop-sync')
      .set('Authorization', `Bearer ${tampered}`)
      .expect(401);
    await request(server())
      .get('/api/v1/shop-sync')
      .set('Authorization', 'Bearer ack_nope')
      .expect(401);
  });

  it('only allows scopes released for keys', async () => {
    await createKey({
      name: `Too much ${suffix}`,
      scopes: ['harvests:read'],
    }).expect(400);
  });

  it('can only be managed with api-keys:manage', async () => {
    await request(server())
      .post('/api/v1/api-keys')
      .set('Authorization', `Bearer ${staffToken}`)
      .send({ name: 'x', scopes: ['shop-sync:read'] })
      .expect(403);
  });

  it('works only from allowed addresses and records where it was used', async () => {
    const elsewhere = (
      await createKey({
        name: `Elsewhere ${suffix}`,
        scopes: ['shop-sync:read'],
        allowedIps: ['203.0.113.7'],
      }).expect(201)
    ).body as CreatedKeyBody;
    await request(server())
      .get('/api/v1/shop-sync')
      .set('Authorization', `Bearer ${elsewhere.token}`)
      .expect(403);

    // Allow loopback (where this test runs) afterwards, without a new key.
    await request(server())
      .patch(`/api/v1/api-keys/${elsewhere.apiKey.id}`)
      .set('Authorization', `Bearer ${adminToken}`)
      .send({ allowedIps: ['127.0.0.0/8', '::1'] })
      .expect(200);
    await request(server())
      .get('/api/v1/shop-sync')
      .set('Authorization', `Bearer ${elsewhere.token}`)
      .expect(200);

    const stored = await prisma.apiKey.findUniqueOrThrow({
      where: { id: elsewhere.apiKey.id },
    });
    expect(stored.lastUsedIp).toMatch(/127\.0\.0\.1|::1/);
  });

  it('refuses an allowlist entry that is not an address or network', async () => {
    await createKey({
      name: `Bad allowlist ${suffix}`,
      scopes: ['shop-sync:read'],
      allowedIps: ['example.com'],
    }).expect(400);
  });
});