/**
 * AcroForm-tier test for parseBerthPdf. Builds a synthetic PDF with named
 * AcroForm fields via pdf-lib and asserts the parser pulls them out without
 * needing OCR.
 */

import { describe, expect, it } from 'vitest';

import { PDFDocument } from 'pdf-lib';

import { parseBerthPdf } from '@/lib/services/berth-pdf-parser';

async function buildAcroFormPdf(): Promise<Buffer> {
  const doc = await PDFDocument.create();
  doc.addPage([400, 400]);
  const form = doc.getForm();

  const fields: Array<[string, string]> = [
    ['mooring_number', 'A1'],
    ['length_ft', '206.67'],
    ['length_m', '63'],
    ['width_ft', '46.58'],
    ['width_m', '14.2'],
    ['power_capacity', '330'],
    ['voltage', '480'],
    ['weekly_rate_high_usd', '11341'],
    ['weekly_rate_low_usd', '8100'],
    ['daily_rate_high_usd', '1890'],
    ['daily_rate_low_usd', '1350'],
    ['pricing_valid_until', '2025-09-15'],
    ['bow_facing', 'East'],
    ['mooring_type', 'Side Pier / Med Mooring'],
  ];
  for (const [name, value] of fields) {
    const field = form.createTextField(name);
    field.setText(value);
  }
  const bytes = await doc.save();
  return Buffer.from(bytes);
}

describe('parseBerthPdf — AcroForm tier', () => {
  it('extracts named fields and skips OCR', async () => {
    const buf = await buildAcroFormPdf();
    const result = await parseBerthPdf(buf, { skipOcr: true });
    expect(result.engine).toBe('acroform');
    expect(result.fields.mooringNumber?.value).toBe('A1');
    expect(result.fields.lengthFt?.value).toBeCloseTo(206.67, 1);
    expect(result.fields.lengthM?.value).toBe(63);
    expect(result.fields.weeklyRateHighUsd?.value).toBe(11341);
    expect(result.fields.pricingValidUntil?.value).toBe('2025-09-15');
    expect(result.fields.bowFacing?.value).toBe('East');
    expect(result.meanConfidence).toBe(1);
  });

  it('rejects a non-PDF buffer via magic-byte check', async () => {
    await expect(parseBerthPdf(Buffer.from('not a pdf'))).rejects.toThrow(/magic-byte/);
  });
});