import { mkdtemp, rm } from 'node:fs/promises';
import { tmpdir } from 'node:os';
import { join } from 'node:path';
import { afterEach, beforeEach, describe, expect, it } from 'vitest';
import XLSX from 'xlsx';
import { ExcelWriter } from '../src/output/excel.js';

let dir = '';

beforeEach(async () => {
  dir = await mkdtemp(join(tmpdir(), 'nlc-excel-'));
});

afterEach(async () => {
  await rm(dir, { force: true, recursive: true });
});

describe('ExcelWriter', () => {
  it('truncates newsletter sheet names to the Excel 31-character limit', async () => {
    const path = join(dir, 'catalog.xlsx');
    const newsletter = 'A Very Long Newsletter Name That Exceeds The Excel Limit';

    await new ExcelWriter(path).write({
      rows: [
        {
          'Source Newsletter': newsletter,
          Title: 'Post',
          'Link URL': 'https://example.com'
        }
      ],
      sponsors: [],
      deadLinks: []
    });

    const workbook = XLSX.readFile(path);
    expect(workbook.SheetNames[0]).toBe('A Very Long Newsletter Name Tha');
    expect(workbook.SheetNames[0].length).toBe(31);
  });
});