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

import { serializeCsv } from '@app/services/export/csv.serializer'

import { buildManifest } from '@app/services/export/manifest.builder'

import { profileTable } from '@app/services/export/table.descriptors'

describe('serializeCsv', () => {

  it('keeps the header row and a BOM when the table has no rows', () => {

    const file = serializeCsv(profileTable, [])

    const text = file.content.toString('utf8')

    expect(text.startsWith('\ufeff')).toBe(true)

    expect(file.rows).toBe(0)

    const lines = text.slice(1).split('\r\n').filter(Boolean)

    expect(lines).toHaveLength(1)

    expect(lines[0]).toContain('Email')

  })

})

describe('buildManifest', () => {

  it('states the generation time and lists each file with its row count', () => {

    const manifest = buildManifest(

      [{ filename: 'profile.csv', content: Buffer.from(''), rows: 0 }],

      new Date('2026-10-04T12:00:00.000Z'),

    )

    const text = manifest.content.toString('utf8')

    expect(manifest.filename).toBe('leia-me.md')

    expect(text).toContain('2026-10-04T12:00:00.000Z')

    expect(text).toContain('`profile.csv` — 0 registros')

    expect(text).toContain('_id')

  })

})