import { BadRequestException } from '@nestjs/common';
import { describe, expect, it, vi } from 'vitest';

vi.mock('../prisma/prisma-tenant.extension', () => ({
  forTenant: vi.fn((p: unknown) => p),
}));

import { forTenant } from '../prisma/prisma-tenant.extension';
import { KantineDatevService } from './kantine-datev.service';

const HEADER = 'PersNr;Name;Menge;EK;Netto;ZuAb;MwSt;Zuschuss;Betrag;Von;Bis';
const GOOD = Buffer.from(
  [HEADER, '100;Max;1;1,00;1,00;0;0;0;7,94;01.03.2026;31.03.2026'].join('\r\n'),
);

function setup(row: Record<string, string | null> | null = null) {
  const kantineDatevConfig = {
    findUnique: vi.fn(async () => row),
    upsert: vi.fn(async ({ create }: any) => create),
  };
  return { prisma: { kantineDatevConfig }, kantineDatevConfig };
}

describe('KantineDatevService — Einstellungen', () => {
  it('liefert ohne Zeile leere Werte und configured=false', async () => {
    const { prisma } = setup(null);
    const res = await new KantineDatevService(prisma as any).getSettings('t1');
    expect(res).toEqual({ beraterNr: null, mandantNr: null, lohnart: null, configured: false });
    expect(forTenant).toHaveBeenCalledWith(prisma, 't1');
  });

  it('configured=false, solange ein Feld fehlt', async () => {
    const { prisma } = setup({ beraterNr: '1', mandantNr: null, lohnart: '3' });
    expect((await new KantineDatevService(prisma as any).getSettings('t1')).configured).toBe(false);
  });

  it('speichert per upsert auf tenantId (aus dem Argument)', async () => {
    const { prisma, kantineDatevConfig } = setup();
    const res = await new KantineDatevService(prisma as any).saveSettings('t1', {
      beraterNr: '1234567',
      mandantNr: '12345',
      lohnart: '1111',
    });
    expect(kantineDatevConfig.upsert).toHaveBeenCalledWith(
      expect.objectContaining({ where: { tenantId: 't1' } }),
    );
    expect(res.configured).toBe(true);
  });
});

describe('KantineDatevService — Vorschau und Export', () => {
  it('Vorschau ohne Einstellungen sperrt mit settingsMissing', async () => {
    const { prisma } = setup(null);
    const p = await new KantineDatevService(prisma as any).preview('t1', GOOD);
    expect(p.blockedReason).toBe('settingsMissing');
    expect(p.rowCount).toBe(1);
  });

  it('Export ohne Einstellungen -> 400 mit code settingsMissing', async () => {
    const { prisma } = setup(null);
    const err: any = await new KantineDatevService(prisma as any)
      .export('t1', GOOD)
      .catch((e) => e);
    expect(err).toBeInstanceOf(BadRequestException);
    expect(err.getResponse().code).toBe('settingsMissing');
  });

  it('Export mit Fehlern -> 400 mit code hasErrors und Fehlerliste', async () => {
    const { prisma } = setup({ beraterNr: '1', mandantNr: '2', lohnart: '3' });
    const bad = Buffer.from(
      [HEADER, 'x;Max;1;1,00;1,00;0;0;0;7,94;01.03.2026;31.03.2026'].join('\n'),
    );
    const err: any = await new KantineDatevService(prisma as any).export('t1', bad).catch((e) => e);
    expect(err.getResponse().code).toBe('hasErrors');
    expect(err.getResponse().errors).toHaveLength(1);
  });

  it('Export mit Einstellungen liefert Datei', async () => {
    const { prisma } = setup({ beraterNr: '1234567', mandantNr: '12345', lohnart: '1111' });
    const res = await new KantineDatevService(prisma as any).export('t1', GOOD);
    expect(res.filename).toBe('LuG_1234567_12345_03_2026.sic');
  });
});