const fs = require('fs');
const os = require('os');
const path = require('path');
const XLSX = require('xlsx');
const SmartPackageExcelValidationService = require('../src/services/smartPackageExcelValidationService');

const createWorkbook = () => {
  const directory = fs.mkdtempSync(path.join(os.tmpdir(), 'smartpakker-validation-'));
  const filePath = path.join(directory, 'smartpakker.xlsx');
  const workbook = XLSX.utils.book_new();

  XLSX.utils.book_append_sheet(workbook, XLSX.utils.json_to_sheet([{
    Pakkenavn: 'Byggepladspakke',
    Kategori: 'Byggeplads',
    Enhed: 'stk.',
    Enhedspris: '0.00 kr.',
    Beskrivelse: 'Testpakke'
  }]), 'Byggeplads');
  XLSX.utils.book_append_sheet(workbook, XLSX.utils.json_to_sheet([{
    Pakkenavn: 'Tømrerpakke',
    Kategori: 'Tag',
    Enhed: 'm²',
    'Pris pr. enhed': '120.00 kr.',
    'Timepris (kr.)': '600.00 kr.',
    'Timer pr. enhed': '0.20',
    Beskrivelse: 'Tømrerarbejde'
  }]), 'Tømrer opgaver');
  XLSX.utils.book_append_sheet(workbook, XLSX.utils.json_to_sheet([{
    Smartpakkenavn: 'Udlejningspakke',
    Kategori: 'Maskiner',
    Enhed: 'dag',
    Standardpris: '500.00 kr.',
    Beskrivelse: 'Leje'
  }]), 'Udlejning');

  XLSX.writeFile(workbook, filePath);
  return { directory, filePath };
};

describe('SmartPackageExcelValidationService', () => {
  let fixture;

  beforeEach(() => {
    fixture = createWorkbook();
  });

  afterEach(() => {
    fs.rmSync(fixture.directory, { recursive: true, force: true });
  });

  test('returns deterministic warnings without blocking import', () => {
    const service = new SmartPackageExcelValidationService(null);
    const result = service.validateStandard(fixture.filePath);

    expect(result.blocksImport).toBe(false);
    expect(result.summary.totalPackages).toBe(2);
    expect(result.summary.skippedZeroPrice).toBe(1);
    expect(result.issues).toEqual(expect.arrayContaining([
      expect.objectContaining({ code: 'zero_price_skipped', packageName: 'Byggepladspakke' })
    ]));
  });

  test('combines standard validation with structured Codex findings', async () => {
    const codexRunner = jest.fn().mockResolvedValue({
        status: 'warnings',
        summary: 'En række bør kontrolleres.',
        issues: [{
          severity: 'warning',
          sheet: 'Byggeplads',
          row: 2,
          packageName: 'Byggepladspakke',
          message: 'Navnet er meget generelt.',
          suggestion: 'Gør navnet mere konkret.'
        }]
    });
    const service = new SmartPackageExcelValidationService(null, { codexRunner });

    const result = await service.validateWithAi(fixture.filePath);

    expect(result.standard.summary.totalPackages).toBe(2);
    expect(result.ai.status).toBe('warnings');
    expect(result.ai.issues).toHaveLength(1);
    expect(codexRunner).toHaveBeenCalled();
    expect(result.ai.provider).toBe('codex-cli');
  });

  test('uses Codex CLI provider without requiring an API client', async () => {
    const codexRunner = jest.fn().mockResolvedValue({
      status: 'passed',
      summary: 'Ingen semantiske problemer fundet.',
      issues: []
    });
    const service = new SmartPackageExcelValidationService(null, {
      provider: 'codex',
      codexRunner
    });

    const result = await service.validateWithAi(fixture.filePath);

    expect(codexRunner).toHaveBeenCalledWith(expect.objectContaining({
      packages: expect.any(Array)
    }));
    expect(result.ai.provider).toBe('codex-cli');
    expect(result.ai.status).toBe('passed');
  });

  test('resolves AI findings to an existing concrete Excel row', async () => {
    const codexRunner = jest.fn().mockResolvedValue({
      status: 'warnings',
      summary: 'En række kræver kontrol.',
      issues: [{
        severity: 'warning',
        sheet: 'Forkert fane',
        row: 999,
        packageName: 'Tømrerpakke',
        field: 'Enhed',
        message: 'Enheden kan være forkert.',
        suggestion: 'Kontrollér enheden.',
        relatedRows: []
      }]
    });
    const service = new SmartPackageExcelValidationService(null, {
      provider: 'codex',
      codexRunner
    });

    const result = await service.validateWithAi(fixture.filePath);

    expect(result.ai.issues).toEqual([expect.objectContaining({
      sheet: 'Tømrer opgaver',
      row: 2,
      packageName: 'Tømrerpakke',
      field: 'Enhed'
    })]);
  });
});