const fs = require('fs/promises');
const path = require('path');
const { cleanTextract, dehyphenateLines, isStandalonePageNumber } = require('../src/clean');

describe('cleaning', () => {
  it('dehyphenates a broken word and keeps a real compound', () => {
    const joined = dehyphenateLines(['This is an exam-', 'ple of text.', 'The well-', 'known road.']);
    expect(joined.lines[0]).toBe('This is an example of text.');
    expect(joined.lines[1]).toBe('The well-known road.');
    expect(joined.hyphenFixes).toBe(1);
  });

  it('recognizes arabic and roman page numbers', () => {
    expect(isStandalonePageNumber('12')).toBe(true);
    expect(isStandalonePageNumber('iv')).toBe(true);
    expect(isStandalonePageNumber('I')).toBe(false);
    expect(isStandalonePageNumber('Chapter 1')).toBe(false);
  });

  it('cleans the layout fixture', async () => {
    const raw = JSON.parse(await fs.readFile(path.join(__dirname, 'fixtures/textract-layout.json'), 'utf8'));
    const { pages } = cleanTextract([raw]);
    const page1 = pages.find((page) => page.page === 1);
    const page2 = pages.find((page) => page.page === 2);
    const page3 = pages.find((page) => page.page === 3);
    const page4 = pages.find((page) => page.page === 4);

    expect(page1.text).toContain('example of a sentence');
    expect(page1.text).not.toMatch(/exam-/);
    expect(page1.text).not.toContain('Edition Banner');
    expect(page1.text).not.toContain('Printed Footer');
    expect(page1.text).not.toContain('Weekly Digest');
    expect(page1.removedLines).toContain('Weekly Digest');
    expect(page1.removedLines).toContain('Confidential');
    expect(page1.printedLabel).toBe('12');

    expect(page2.text.indexOf('Left column sentence.')).toBeLessThan(page2.text.indexOf('Right column sentence.'));
    expect(page2.text).not.toContain('iv');

    expect(page3.text).toContain('Ada 36');
    expect(page3.text).toContain('Item one');
    expect(page3.text).toContain('Item two');

    expect(page4.text).toContain('well-known');
    expect(page4.text).toContain('filigature');
    expect(page4.text).not.toContain('\uFB01');
  });
});