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 GapBody {
  code: string;
}
interface ConflictBody {
  code: string;
  message: string;
  gaps: GapBody[];
}
interface CheckBody {
  printable: boolean;
  sample: boolean;
  gaps: GapBody[];
  warnings: GapBody[];
}

const SIZE = 80;

function textElement(
  id: string,
  y: number,
  placeholderKey: string,
  fontSize = 9,
) {
  return {
    id,
    type: 'text',
    x: 2,
    y,
    width: SIZE,
    height: 8,
    text: '',
    placeholderKey,
    fontSize,
    fontFamily: 'sans',
    bold: false,
    italic: false,
    color: '#000000',
    align: 'left',
  };
}

// Every mandatory particular, the net quantity big enough for 500 g.
const COMPLETE_ELEMENTS = [
  textElement('legal', 1, 'legalName'),
  textElement('net', 10, 'jarSize', 16),
  textElement('mhd', 20, 'bestBeforeLine'),
  textElement('lot', 29, 'lotLine'),
  textElement('origin', 38, 'originCountry'),
  textElement('firm', 47, 'foodBusinessName'),
  textElement('address', 56, 'foodBusinessAddress'),
];

describe('Label compliance (e2e)', () => {
  let app: INestApplication<App>;
  let prisma: PrismaService;
  const suffix = Date.now();
  const password = 'SuperSecret123!';
  const printerEmail = `label-compliance-printer-${suffix}@example.com`;
  const readerEmail = `label-compliance-reader-${suffix}@example.com`;
  let printerId: string;
  let readerId: string;
  let readerRoleId: string;
  let labelOnlyId: string;
  let labelOnlyRoleId: string;
  let labelOnlyToken: string;
  const labelOnlyEmail = `label-compliance-labelonly-${suffix}@example.com`;
  let printerToken: string;
  let readerToken: string;
  let productId: string;
  let templateId: string;
  let honeyBatchId: string;
  let extractionId: string;
  let bottlingId: string;
  let settingsBefore: {
    foodBusinessName: string | null;
    foodBusinessAddress: string | null;
    originCountry: string;
  } | null = null;

  async function setMasterData(complete: boolean): Promise<void> {
    // Other suites clear this table; the check refuses without the row.
    await prisma.complianceSettings.upsert({
      where: { id: 'singleton' },
      update: {},
      create: { id: 'singleton' },
    });
    const data = {
      foodBusinessName: complete ? 'Imkerei Muster' : null,
      foodBusinessAddress: complete ? 'Bühlweg 10, 86450 Altenmünster' : null,
      originCountry: 'Deutschland',
    };
    await prisma.siteSettings.upsert({
      where: { id: 'singleton' },
      update: data,
      create: { id: 'singleton', ...data },
    });
    await prisma.product.update({
      where: { id: productId },
      data: { legalName: complete ? 'Blütenhonig' : null },
    });
  }

  const printUrl = (query = '') =>
    `/api/v1/label-templates/${templateId}/print/${bottlingId}${query}`;

  const printAuditCount = () =>
    prisma.auditLog.count({
      where: {
        entityType: 'BottlingBatch',
        entityId: bottlingId,
        action: 'PRINT',
      },
    });

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

    const passwordHash = await bcrypt.hash(password, 12);
    const beekeeper = await prisma.user.create({
      data: {
        email: printerEmail,
        passwordHash,
        name: 'Printer',
        role: { connect: { key: 'ADMIN' } },
      },
    });
    printerId = beekeeper.id;
    // The test database grants the label permissions to ADMIN only, so the
    // "can look but not print" user gets a role of its own.
    const [readPermission, bottlingRead] = await Promise.all([
      prisma.permission.findUniqueOrThrow({
        where: { key: 'label-templates:read' },
      }),
      prisma.permission.findUniqueOrThrow({ where: { key: 'bottling:read' } }),
    ]);
    const readerRole = await prisma.role.create({
      data: {
        key: `label-compliance-reader-${suffix}`,
        name: 'Label and bottling reader',
        permissions: {
          create: [
            { permissionId: readPermission.id },
            { permissionId: bottlingRead.id },
          ],
        },
      },
    });
    readerRoleId = readerRole.id;
    const reader = await prisma.user.create({
      data: {
        email: readerEmail,
        passwordHash,
        name: 'Reader',
        roleId: readerRole.id,
      },
    });
    readerId = reader.id;
    // Sees label templates, but not bottlings.
    const labelOnlyRole = await prisma.role.create({
      data: {
        key: `label-compliance-labelonly-${suffix}`,
        name: 'Label reader',
        permissions: { create: { permissionId: readPermission.id } },
      },
    });
    labelOnlyRoleId = labelOnlyRole.id;
    const labelOnly = await prisma.user.create({
      data: {
        email: labelOnlyEmail,
        passwordHash,
        name: 'Label only',
        roleId: labelOnlyRole.id,
      },
    });
    labelOnlyId = labelOnly.id;
    labelOnlyToken = (await login(app, labelOnlyEmail, password)).accessToken;
    printerToken = (await login(app, printerEmail, password)).accessToken;
    readerToken = (await login(app, readerEmail, password)).accessToken;

    settingsBefore = await prisma.siteSettings.findUnique({
      where: { id: 'singleton' },
      select: {
        foodBusinessName: true,
        foodBusinessAddress: true,
        originCountry: true,
      },
    });

    const product = await prisma.product.create({
      data: { name: `Label-Compliance-Glas ${suffix}` },
    });
    productId = product.id;
    const extraction = await prisma.extraction.create({
      data: { date: new Date(), userId: printerId },
    });
    extractionId = extraction.id;
    const honeyBatch = await prisma.honeyBatch.create({
      data: {
        batchNumber: `LC-${suffix}`,
        extractionId,
        amount: 25,
        initialAmount: 25,
      },
    });
    honeyBatchId = honeyBatch.id;
    const bottling = await prisma.bottlingBatch.create({
      data: {
        honeyBatchId,
        productId,
        date: new Date('2026-06-01T00:00:00.000Z'),
        jarSize: 500,
        jarCount: 2,
        totalAmount: 1,
        bestBeforeDate: new Date('2028-06-01T00:00:00.000Z'),
        lotNumber: `L-${suffix}`,
        userId: printerId,
      },
    });
    bottlingId = bottling.id;
    const template = await prisma.labelTemplate.create({
      data: {
        name: `Label-Compliance ${suffix}`,
        elements: COMPLETE_ELEMENTS,
        widthMm: 90,
        heightMm: 70,
      },
    });
    templateId = template.id;
  });

  afterAll(async () => {
    await prisma.auditLog.deleteMany({
      where: { entityType: 'BottlingBatch', entityId: bottlingId },
    });
    await prisma.bottlingBatch.deleteMany({ where: { id: bottlingId } });
    await prisma.honeyBatch.deleteMany({ where: { id: honeyBatchId } });
    await prisma.extraction.deleteMany({ where: { id: extractionId } });
    await prisma.labelTemplate.deleteMany({ where: { id: templateId } });
    await prisma.product.deleteMany({ where: { id: productId } });
    if (settingsBefore) {
      await prisma.siteSettings.update({
        where: { id: 'singleton' },
        data: settingsBefore,
      });
    }
    await prisma.refreshToken.deleteMany({
      where: { userId: { in: [printerId, readerId, labelOnlyId] } },
    });
    await prisma.user.deleteMany({
      where: { id: { in: [printerId, readerId, labelOnlyId] } },
    });
    await prisma.role.deleteMany({
      where: { id: { in: [readerRoleId, labelOnlyRoleId] } },
    });
    await app.close();
  });

  it('409 with the gap list, then 200 and an audit PRINT after the master data is complete', async () => {
    await setMasterData(false);

    const refused = await request(app.getHttpServer())
      .get(printUrl())
      .set('Authorization', `Bearer ${printerToken}`)
      .expect(409);
    const body = refused.body as ConflictBody;
    expect(body.code).toBe('LABEL_PARTICULARS_MISSING');
    expect(body.gaps.map((gap) => gap.code).sort()).toEqual([
      'FOOD_BUSINESS',
      'LEGAL_NAME',
    ]);
    expect(await printAuditCount()).toBe(0);

    await setMasterData(true);
    const printed = await request(app.getHttpServer())
      .get(printUrl())
      .set('Authorization', `Bearer ${printerToken}`)
      .expect(200);
    expect(printed.headers['content-type']).toContain('application/pdf');
    expect((printed.body as Buffer).subarray(0, 4).toString('latin1')).toBe(
      '%PDF',
    );

    const entries = await prisma.auditLog.findMany({
      where: {
        entityType: 'BottlingBatch',
        entityId: bottlingId,
        action: 'PRINT',
      },
    });
    expect(entries).toHaveLength(1);
    expect(entries[0].userId).toBe(printerId);
    expect(entries[0].afterData).toEqual({
      templateId,
      copies: 2,
      proof: false,
      gapCodes: [],
      warningCodes: [],
    });
  });

  it('GET print with proof=true answers 200 although a particular is missing', async () => {
    await setMasterData(false);
    const before = await printAuditCount();

    const response = await request(app.getHttpServer())
      .get(printUrl('?proof=true'))
      .set('Authorization', `Bearer ${printerToken}`)
      .expect(200);

    expect((response.body as Buffer).subarray(0, 4).toString('latin1')).toBe(
      '%PDF',
    );
    expect(await printAuditCount()).toBe(before + 1);
    const latest = await prisma.auditLog.findFirst({
      where: { entityType: 'BottlingBatch', entityId: bottlingId },
      orderBy: { timestamp: 'desc' },
    });
    expect(latest?.afterData).toMatchObject({
      proof: true,
      gapCodes: expect.arrayContaining(['LEGAL_NAME']) as unknown,
    });
  });

  it('rejects a malformed proof flag with 400', async () => {
    await request(app.getHttpServer())
      .get(printUrl('?proof=maybe'))
      .set('Authorization', `Bearer ${printerToken}`)
      .expect(400);
  });

  it('GET check answers the same gaps the print refuses with', async () => {
    await setMasterData(false);

    const response = await request(app.getHttpServer())
      .get(`/api/v1/label-templates/${templateId}/check/${bottlingId}`)
      .set('Authorization', `Bearer ${readerToken}`)
      .expect(200);

    const body = response.body as CheckBody;
    expect(body.printable).toBe(false);
    expect(body.sample).toBe(false);
    expect(body.gaps.map((gap) => gap.code).sort()).toEqual([
      'FOOD_BUSINESS',
      'LEGAL_NAME',
    ]);
    expect(response.headers['cache-control']).toContain('no-store');
  });

  it('POST check without a bottling uses the sample values', async () => {
    const response = await request(app.getHttpServer())
      .post('/api/v1/label-templates/check')
      .set('Authorization', `Bearer ${readerToken}`)
      .send({
        elements: [textElement('legal', 1, 'legalName')],
        widthMm: 90,
        heightMm: 70,
        minXHeightMm: 1.2,
      })
      .expect(200);

    const body = response.body as CheckBody;
    expect(body.sample).toBe(true);
    expect(body.gaps.map((gap) => gap.code)).not.toContain('LEGAL_NAME');
  });

  it('POST check rejects an image element with 400', async () => {
    await request(app.getHttpServer())
      .post('/api/v1/label-templates/check')
      .set('Authorization', `Bearer ${readerToken}`)
      .send({
        elements: [
          {
            id: 'img',
            type: 'image',
            x: 0,
            y: 0,
            width: 10,
            height: 10,
            fontSize: 9,
            src: 'data:image/png;base64,AAAA',
          },
        ],
        widthMm: 90,
        heightMm: 70,
        minXHeightMm: 1.2,
      })
      .expect(400);
  });

  it('POST check with 101 elements answers 400', async () => {
    const elements = Array.from({ length: 101 }, (_, index) =>
      textElement(`el-${index}`, 1, 'legalName'),
    );

    await request(app.getHttpServer())
      .post('/api/v1/label-templates/check')
      .set('Authorization', `Bearer ${readerToken}`)
      .send({ elements, widthMm: 90, heightMm: 70, minXHeightMm: 1.2 })
      .expect(400);
  });

  it('print needs label-templates:print, check needs label-templates:read', async () => {
    await request(app.getHttpServer())
      .get(printUrl('?proof=true'))
      .set('Authorization', `Bearer ${readerToken}`)
      .expect(403);
    await request(app.getHttpServer())
      .get(`/api/v1/label-templates/${templateId}/check/${bottlingId}`)
      .expect(401);
    await request(app.getHttpServer())
      .post('/api/v1/label-templates/check')
      .expect(401);
  });

  it('?proof=false with a gap answers 409, ?proof=0 answers 400', async () => {
    await setMasterData(false);

    await request(app.getHttpServer())
      .get(printUrl('?proof=false'))
      .set('Authorization', `Bearer ${printerToken}`)
      .expect(409);
    await request(app.getHttpServer())
      .get(printUrl('?proof=0'))
      .set('Authorization', `Bearer ${printerToken}`)
      .expect(400);
  });

  it.each(['0', '-1', '1001', 'x'])(
    'startPosition=%s answers 400',
    async (value) => {
      await setMasterData(true);

      await request(app.getHttpServer())
        .get(printUrl(`?startPosition=${value}`))
        .set('Authorization', `Bearer ${printerToken}`)
        .expect(400);
    },
  );

  it('a label-only reader gets 403 on check and print, and on a draft check with a bottling', async () => {
    await request(app.getHttpServer())
      .get(`/api/v1/label-templates/${templateId}/check/${bottlingId}`)
      .set('Authorization', `Bearer ${labelOnlyToken}`)
      .expect(403);
    await request(app.getHttpServer())
      .post('/api/v1/label-templates/check')
      .set('Authorization', `Bearer ${labelOnlyToken}`)
      .send({
        elements: [textElement('legal', 1, 'legalName')],
        widthMm: 90,
        heightMm: 70,
        minXHeightMm: 1.2,
        bottlingBatchId: bottlingId,
      })
      .expect(403);
  });

  it('a label-only reader may check a draft with the sample values', async () => {
    await request(app.getHttpServer())
      .post('/api/v1/label-templates/check')
      .set('Authorization', `Bearer ${labelOnlyToken}`)
      .send({
        elements: [textElement('legal', 1, 'legalName')],
        widthMm: 90,
        heightMm: 70,
        minXHeightMm: 1.2,
      })
      .expect(200);
  });

  it('POST check rejects duplicate element ids and out-of-range sizes with 400', async () => {
    const draft = (elements: unknown[]) => ({
      elements,
      widthMm: 90,
      heightMm: 70,
      minXHeightMm: 1.2,
    });
    const element = textElement('same', 1, 'legalName');

    for (const body of [
      draft([element, element]),
      draft([{ ...element, width: 5000 }]),
      draft([{ ...element, x: -5000 }]),
      { ...draft([element]), widthMm: 5000 },
    ]) {
      await request(app.getHttpServer())
        .post('/api/v1/label-templates/check')
        .set('Authorization', `Bearer ${readerToken}`)
        .send(body)
        .expect(400);
    }
  });

  it('print and check answer 409 when the compliance settings row is missing', async () => {
    await setMasterData(true);
    const saved = await prisma.complianceSettings.findUniqueOrThrow({
      where: { id: 'singleton' },
    });
    const restore = {
      ...saved,
      netQuantityDigitRules: saved.netQuantityDigitRules as object,
    };
    await prisma.complianceSettings.delete({ where: { id: 'singleton' } });
    try {
      const response = await request(app.getHttpServer())
        .get(printUrl())
        .set('Authorization', `Bearer ${printerToken}`)
        .expect(409);
      expect((response.body as { code: string }).code).toBe(
        'COMPLIANCE_SETTINGS_INVALID',
      );
    } finally {
      await prisma.complianceSettings.create({ data: restore });
    }
  });

  it('the response of a print is no-store', async () => {
    await setMasterData(true);

    const response = await request(app.getHttpServer())
      .get(printUrl())
      .set('Authorization', `Bearer ${printerToken}`)
      .expect(200);

    expect(response.headers['cache-control']).toContain('no-store');
  });
});