import { INestApplication } from '@nestjs/common';
import * as bcrypt from 'bcryptjs';
import * as fs from 'node:fs/promises';
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';

// The upload checks the file's magic bytes against its declared type, so
// the fixture must start with a real PNG signature.
const PNG_BYTES = Buffer.concat([
  Buffer.from([0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a]),
  Buffer.from('test image payload'),
]);

interface DocumentBody {
  id: string;
  entityType: string;
  entityId: string;
  fileName: string;
  mimeType: string;
  sizeBytes: number;
  storagePath?: string;
}

describe('Documents (e2e)', () => {
  let app: INestApplication<App>;
  let prisma: PrismaService;
  const beekeeperEmail = `documents-e2e-beekeeper-${Date.now()}@example.com`;
  const readonlyEmail = `documents-e2e-readonly-${Date.now()}@example.com`;
  const password = 'SuperSecret123!';
  let beekeeperId: string;
  let readonlyId: string;
  let beekeeperToken: string;
  let readonlyToken: string;
  let apiaryId: string;
  let colonyId: string;
  let documentId: string;

  beforeAll(async () => {
    app = await createTestApp();
    prisma = app.get(PrismaService);

    const passwordHash = await bcrypt.hash(password, 12);
    const beekeeper = await prisma.user.create({
      data: {
        email: beekeeperEmail,
        passwordHash,
        name: 'Documents E2E Beekeeper',
        role: { connect: { key: 'BEEKEEPER' } },
      },
    });
    beekeeperId = beekeeper.id;
    const readonly = await prisma.user.create({
      data: {
        email: readonlyEmail,
        passwordHash,
        name: 'Documents E2E Readonly',
        role: { connect: { key: 'READONLY' } },
      },
    });
    readonlyId = readonly.id;
    beekeeperToken = (await login(app, beekeeperEmail, password)).accessToken;
    readonlyToken = (await login(app, readonlyEmail, password)).accessToken;

    const apiary = await prisma.apiary.create({
      data: { name: `Dokumente-Stand ${Date.now()}` },
    });
    apiaryId = apiary.id;
    const colony = await prisma.colony.create({
      data: {
        code: `V-DOC-${Date.now()}`,
        apiaryId,
        colonyType: 'PRODUCTION_COLONY',
      },
    });
    colonyId = colony.id;
  });

  afterAll(async () => {
    await prisma.document.deleteMany({
      where: { entityType: 'COLONY', entityId: colonyId },
    });
    await prisma.colony.deleteMany({ where: { id: colonyId } });
    await prisma.apiary.deleteMany({ where: { id: apiaryId } });
    await prisma.refreshToken.deleteMany({
      where: { userId: { in: [beekeeperId, readonlyId] } },
    });
    await prisma.auditLog.deleteMany({
      where: { userId: { in: [beekeeperId, readonlyId] } },
    });
    await prisma.user.deleteMany({
      where: { id: { in: [beekeeperId, readonlyId] } },
    });
    await fs.rm('./test-uploads', { recursive: true, force: true });
    await app.close();
  });

  it('rejects an upload from a role without write access', () => {
    return request(app.getHttpServer())
      .post('/api/v1/documents')
      .set('Authorization', `Bearer ${readonlyToken}`)
      .field('entityType', 'COLONY')
      .field('entityId', colonyId)
      .attach('file', PNG_BYTES, {
        filename: 'bild.png',
        contentType: 'image/png',
      })
      .expect(403);
  });

  it('rejects an unsupported mime type', () => {
    return request(app.getHttpServer())
      .post('/api/v1/documents')
      .set('Authorization', `Bearer ${beekeeperToken}`)
      .field('entityType', 'COLONY')
      .field('entityId', colonyId)
      .attach('file', Buffer.from('not an image'), {
        filename: 'script.exe',
        contentType: 'application/octet-stream',
      })
      .expect(400);
  });

  it('rejects an upload for a non-existent entity', () => {
    return request(app.getHttpServer())
      .post('/api/v1/documents')
      .set('Authorization', `Bearer ${beekeeperToken}`)
      .field('entityType', 'COLONY')
      .field('entityId', 'does-not-exist')
      .attach('file', PNG_BYTES, {
        filename: 'bild.png',
        contentType: 'image/png',
      })
      .expect(404);
  });

  it('lets a beekeeper upload a document and omits storagePath from the response', async () => {
    const response = await request(app.getHttpServer())
      .post('/api/v1/documents')
      .set('Authorization', `Bearer ${beekeeperToken}`)
      .field('entityType', 'COLONY')
      .field('entityId', colonyId)
      .attach('file', PNG_BYTES, {
        filename: 'bild.png',
        contentType: 'image/png',
      })
      .expect(201);
    const body = response.body as DocumentBody;
    documentId = body.id;
    expect(body.entityType).toBe('COLONY');
    expect(body.entityId).toBe(colonyId);
    expect(body.fileName).toBe('bild.png');
    expect(body.mimeType).toBe('image/png');
    expect(body.storagePath).toBeUndefined();
  });

  it('lists documents for the entity', async () => {
    const response = await request(app.getHttpServer())
      .get(`/api/v1/documents?entityType=COLONY&entityId=${colonyId}`)
      .set('Authorization', `Bearer ${readonlyToken}`)
      .expect(200);
    const body = response.body as DocumentBody[];
    expect(body.some((entry) => entry.id === documentId)).toBe(true);
  });

  it('downloads the uploaded file with matching content and headers', async () => {
    const response = await request(app.getHttpServer())
      .get(`/api/v1/documents/${documentId}/download`)
      .set('Authorization', `Bearer ${readonlyToken}`)
      .expect(200);
    expect(response.headers['content-type']).toContain('image/png');
    expect(response.headers['content-disposition']).toContain('bild.png');
    const downloaded = response.body as Buffer;
    expect(Buffer.compare(downloaded, PNG_BYTES)).toBe(0);
  });

  it('rejects a delete from a role without write access', () => {
    return request(app.getHttpServer())
      .delete(`/api/v1/documents/${documentId}`)
      .set('Authorization', `Bearer ${readonlyToken}`)
      .expect(403);
  });

  it('lets a beekeeper delete the document', () => {
    return request(app.getHttpServer())
      .delete(`/api/v1/documents/${documentId}`)
      .set('Authorization', `Bearer ${beekeeperToken}`)
      .expect(204);
  });

  it('replays an upload with the same Idempotency-Key', async () => {
    const key = `idem-documents-${Date.now()}-upload-0001`;
    const upload = () =>
      request(app.getHttpServer())
        .post('/api/v1/documents')
        .set('Authorization', `Bearer ${beekeeperToken}`)
        .set('Idempotency-Key', key)
        .field('entityType', 'COLONY')
        .field('entityId', colonyId)
        .attach('file', PNG_BYTES, {
          filename: 'idempotent.png',
          contentType: 'image/png',
        })
        .expect(201);
    const before = await prisma.document.count({
      where: { entityType: 'COLONY', entityId: colonyId },
    });

    const first = await upload();
    const second = await upload();

    expect((second.body as DocumentBody).id).toBe(
      (first.body as DocumentBody).id,
    );
    expect(
      await prisma.document.count({
        where: { entityType: 'COLONY', entityId: colonyId },
      }),
    ).toBe(before + 1);
  });
});

describe('Documents of specialist records (e2e)', () => {
  let app: INestApplication<App>;
  let prisma: PrismaService;
  const suffix = `${Date.now()}`;
  const password = 'SuperSecret123!';
  const roleIds: string[] = [];
  const userIds: string[] = [];
  let apiaryId: string;
  let medicineId: string;
  let lotId: string;
  let noticeId: string;
  let restrictionId: string;
  let docsOnlyToken: string;
  let docsAndManageToken: string;
  let staffToken: string;
  let beekeeperToken: string;
  let lotDocumentId: string;
  let noticeDocumentId: string;
  let restrictionDocumentId: string;

  const api = () => request(app.getHttpServer());
  const auth = (token: string) => ({ Authorization: `Bearer ${token}` });

  async function createUser(
    label: string,
    options: { permissions?: string[]; roleKey?: string },
  ): Promise<string> {
    let roleId: string;
    if (options.roleKey) {
      roleId = (
        await prisma.role.findUniqueOrThrow({ where: { key: options.roleKey } })
      ).id;
    } else {
      const role = await prisma.role.create({
        data: {
          key: `DOC_SPECIAL_${label.toUpperCase()}_${suffix}`,
          name: `Documents special ${label}`,
          permissions: {
            create: (options.permissions ?? []).map((key) => ({
              permission: { connect: { key } },
            })),
          },
        },
      });
      roleIds.push(role.id);
      roleId = role.id;
    }
    const email = `doc-special-${label}-${suffix}@example.com`;
    const user = await prisma.user.create({
      data: {
        email,
        passwordHash: await bcrypt.hash(password, 12),
        name: `Documents special ${label}`,
        role: { connect: { id: roleId } },
      },
    });
    userIds.push(user.id);
    return (await login(app, email, password)).accessToken;
  }

  const upload = (
    token: string,
    entityType: string,
    entityId: string,
    fileName = 'beleg.png',
  ) =>
    api()
      .post('/api/v1/documents')
      .set(auth(token))
      .field('entityType', entityType)
      .field('entityId', entityId)
      .attach('file', PNG_BYTES, {
        filename: fileName,
        contentType: 'image/png',
      });

  beforeAll(async () => {
    app = await createTestApp();
    prisma = app.get(PrismaService);

    const crud = [
      'documents:read',
      'documents:upload',
      'documents:update',
      'documents:delete',
    ];
    docsOnlyToken = await createUser('docsonly', { permissions: crud });
    docsAndManageToken = await createUser('docsmanage', {
      permissions: [...crud, 'compliance:read', 'compliance:manage'],
    });
    staffToken = await createUser('staff', { roleKey: 'STAFF' });
    beekeeperToken = await createUser('beekeeper', { roleKey: 'BEEKEEPER' });

    const apiary = await prisma.apiary.create({
      data: { name: `Dok-Spezial-Stand ${suffix}` },
    });
    apiaryId = apiary.id;
    const medicine = await prisma.veterinaryMedicine.create({
      data: { name: `Dok-Mittel ${suffix}`, unit: 'ML' },
    });
    medicineId = medicine.id;
    const lot = await prisma.veterinaryMedicineLot.create({
      data: { medicineId, purchasedOn: new Date('2026-05-01'), quantity: 10 },
    });
    lotId = lot.id;
    const notice = await prisma.authorityNotice.create({
      data: {
        kind: 'REGISTRATION',
        referenceDate: new Date('2026-05-01'),
        countedAt: new Date('2026-05-01'),
        snapshot: {},
        totalColonies: 0,
      },
    });
    noticeId = notice.id;
    const restriction = await prisma.apiaryRestriction.create({
      data: {
        apiaryId,
        disease: 'Test',
        startsOn: new Date('2026-05-01'),
      },
    });
    restrictionId = restriction.id;
  });

  afterAll(async () => {
    await prisma.document.deleteMany({
      where: { entityId: { in: [lotId, noticeId, restrictionId] } },
    });
    await prisma.apiaryRestriction.deleteMany({ where: { id: restrictionId } });
    await prisma.authorityNotice.deleteMany({ where: { id: noticeId } });
    await prisma.veterinaryMedicineLot.deleteMany({ where: { id: lotId } });
    await prisma.veterinaryMedicine.deleteMany({ where: { id: medicineId } });
    await prisma.apiary.deleteMany({ where: { id: apiaryId } });
    await prisma.refreshToken.deleteMany({
      where: { userId: { in: userIds } },
    });
    await prisma.auditLog.deleteMany({ where: { userId: { in: userIds } } });
    await prisma.user.deleteMany({ where: { id: { in: userIds } } });
    await prisma.role.deleteMany({ where: { id: { in: roleIds } } });
    await fs.rm('./test-uploads', { recursive: true, force: true });
    await app.close();
  });

  it('STAFF uploads a purchase receipt to a lot and downloads it again', async () => {
    const response = await upload(staffToken, 'MEDICINE_LOT', lotId).expect(
      201,
    );
    lotDocumentId = (response.body as DocumentBody).id;

    const list = await api()
      .get(`/api/v1/documents?entityType=MEDICINE_LOT&entityId=${lotId}`)
      .set(auth(staffToken))
      .expect(200);
    expect(
      (list.body as DocumentBody[]).some((entry) => entry.id === lotDocumentId),
    ).toBe(true);

    const download = await api()
      .get(`/api/v1/documents/${lotDocumentId}/download`)
      .set(auth(staffToken))
      .expect(200);
    expect(Buffer.compare(download.body as Buffer, PNG_BYTES)).toBe(0);
    expect(download.headers['cache-control']).toBe('no-store');
    expect(list.headers['cache-control']).toBe('no-store');
  });

  it('a user with documents:read but without veterinary-medicines:read gets 403 listing and downloading a MEDICINE_LOT document', async () => {
    await api()
      .get(`/api/v1/documents?entityType=MEDICINE_LOT&entityId=${lotId}`)
      .set(auth(docsOnlyToken))
      .expect(403);
    await api()
      .get(`/api/v1/documents/${lotDocumentId}/download`)
      .set(auth(docsOnlyToken))
      .expect(403);
  });

  it('a user with documents:read but without compliance:read gets 403 listing AUTHORITY_NOTICE and APIARY_RESTRICTION documents', async () => {
    await api()
      .get(`/api/v1/documents?entityType=AUTHORITY_NOTICE&entityId=${noticeId}`)
      .set(auth(docsOnlyToken))
      .expect(403);
    await api()
      .get(
        `/api/v1/documents?entityType=APIARY_RESTRICTION&entityId=${restrictionId}`,
      )
      .set(auth(docsOnlyToken))
      .expect(403);
  });

  it('a user with documents:upload but without compliance:manage gets 403 uploading to an AUTHORITY_NOTICE', async () => {
    const before = await prisma.document.count({
      where: { entityId: noticeId },
    });
    await upload(docsOnlyToken, 'AUTHORITY_NOTICE', noticeId).expect(403);
    await upload(docsOnlyToken, 'APIARY_RESTRICTION', restrictionId).expect(
      403,
    );
    // STAFF has no compliance:manage either
    await upload(staffToken, 'AUTHORITY_NOTICE', noticeId).expect(403);
    expect(await prisma.document.count({ where: { entityId: noticeId } })).toBe(
      before,
    );
  });

  it('a user with compliance:manage uploads, lists and downloads authority documents', async () => {
    const notice = await upload(
      docsAndManageToken,
      'AUTHORITY_NOTICE',
      noticeId,
    ).expect(201);
    noticeDocumentId = (notice.body as DocumentBody).id;
    const restriction = await upload(
      docsAndManageToken,
      'APIARY_RESTRICTION',
      restrictionId,
    ).expect(201);
    restrictionDocumentId = (restriction.body as DocumentBody).id;

    await api()
      .get(`/api/v1/documents?entityType=AUTHORITY_NOTICE&entityId=${noticeId}`)
      .set(auth(docsAndManageToken))
      .expect(200);
    await api()
      .get(`/api/v1/documents/${noticeDocumentId}/download`)
      .set(auth(docsAndManageToken))
      .expect(200);
    // documents:read alone must not reach it
    await api()
      .get(`/api/v1/documents/${restrictionDocumentId}/download`)
      .set(auth(docsOnlyToken))
      .expect(403);
  });

  it('re-linking a document to an APIARY_RESTRICTION needs compliance:manage', async () => {
    // a document on a harmless record, owned by the docs-only user
    const apiaryDoc = await upload(docsOnlyToken, 'APIARY', apiaryId).expect(
      201,
    );
    const id = (apiaryDoc.body as DocumentBody).id;

    await api()
      .patch(`/api/v1/documents/${id}`)
      .set(auth(docsOnlyToken))
      .send({ entityType: 'APIARY_RESTRICTION', entityId: restrictionId })
      .expect(403);
    expect(
      (await prisma.document.findUniqueOrThrow({ where: { id } })).entityType,
    ).toBe('APIARY');

    await api()
      .patch(`/api/v1/documents/${id}`)
      .set(auth(docsAndManageToken))
      .send({ entityType: 'APIARY_RESTRICTION', entityId: restrictionId })
      .expect(200);

    // moving it back out needs the right of the OLD type too
    await api()
      .patch(`/api/v1/documents/${id}`)
      .set(auth(docsOnlyToken))
      .send({ entityType: 'APIARY', entityId: apiaryId })
      .expect(403);
    await api()
      .delete(`/api/v1/documents/${id}`)
      .set(auth(docsAndManageToken))
      .expect(204);
  });

  it('renaming a restricted document without the right is denied', () => {
    return api()
      .patch(`/api/v1/documents/${lotDocumentId}`)
      .set(auth(docsOnlyToken))
      .send({ fileName: 'neu.png' })
      .expect(403);
  });

  it('deleting a MEDICINE_LOT document needs veterinary-medicines:update', async () => {
    await api()
      .delete(`/api/v1/documents/${lotDocumentId}`)
      .set(auth(docsOnlyToken))
      .expect(403);
    expect(await prisma.document.count({ where: { id: lotDocumentId } })).toBe(
      1,
    );
    await api()
      .delete(`/api/v1/documents/${lotDocumentId}`)
      .set(auth(beekeeperToken))
      .expect(204);
  });

  it('answers 403, not 404, for an unauthorised upload to a missing MEDICINE_LOT record', async () => {
    await upload(docsOnlyToken, 'MEDICINE_LOT', 'nope').expect(403);
  });

  describe('read/write split over HTTP', () => {
    async function userWith(label: string, permissions: string[]) {
      return createUser(label, { permissions });
    }

    it('compliance:read without compliance:manage lists (200) but cannot upload (403)', async () => {
      const token = await userWith('comp-read', [
        'documents:read',
        'documents:upload',
        'compliance:read',
      ]);
      await api()
        .get(
          `/api/v1/documents?entityType=AUTHORITY_NOTICE&entityId=${noticeId}`,
        )
        .set(auth(token))
        .expect(200);
      await upload(token, 'AUTHORITY_NOTICE', noticeId).expect(403);
      await upload(token, 'APIARY_RESTRICTION', restrictionId).expect(403);
    });

    it('veterinary-medicines:read without :update lists and downloads (200) but cannot delete or patch (403)', async () => {
      const token = await userWith('med-read', [
        'documents:read',
        'documents:update',
        'documents:delete',
        'veterinary-medicines:read',
      ]);
      const created = await upload(
        beekeeperToken,
        'MEDICINE_LOT',
        lotId,
      ).expect(201);
      const id = (created.body as DocumentBody).id;
      await api()
        .get(`/api/v1/documents?entityType=MEDICINE_LOT&entityId=${lotId}`)
        .set(auth(token))
        .expect(200);
      await api()
        .get(`/api/v1/documents/${id}/download`)
        .set(auth(token))
        .expect(200);
      await api()
        .delete(`/api/v1/documents/${id}`)
        .set(auth(token))
        .expect(403);
      await api()
        .patch(`/api/v1/documents/${id}`)
        .set(auth(token))
        .send({ fileName: 'x.png' })
        .expect(403);
      expect(await prisma.document.count({ where: { id } })).toBe(1);
    });

    it('compliance:manage without compliance:read uploads (201) but cannot list (403)', async () => {
      const token = await userWith('comp-manage', [
        'documents:read',
        'documents:upload',
        'compliance:manage',
      ]);
      await upload(token, 'AUTHORITY_NOTICE', noticeId).expect(201);
      await api()
        .get(
          `/api/v1/documents?entityType=AUTHORITY_NOTICE&entityId=${noticeId}`,
        )
        .set(auth(token))
        .expect(403);
    });
  });

  it('answers 404 for a missing record of the new types when the user has the right', async () => {
    await upload(staffToken, 'MEDICINE_LOT', 'does-not-exist').expect(404);
    await upload(docsAndManageToken, 'AUTHORITY_NOTICE', 'nope').expect(404);
    await upload(docsAndManageToken, 'APIARY_RESTRICTION', 'nope').expect(404);
  });

  it('uploads keep the MIME allowlist and signature check for the new types', async () => {
    await api()
      .post('/api/v1/documents')
      .set(auth(staffToken))
      .field('entityType', 'MEDICINE_LOT')
      .field('entityId', lotId)
      .attach('file', Buffer.from('MZ not allowed'), {
        filename: 'x.exe',
        contentType: 'application/octet-stream',
      })
      .expect(400);
    await api()
      .post('/api/v1/documents')
      .set(auth(staffToken))
      .field('entityType', 'MEDICINE_LOT')
      .field('entityId', lotId)
      .attach('file', Buffer.from('plain text, not a png'), {
        filename: 'fake.png',
        contentType: 'image/png',
      })
      .expect(400);
  });
});