import { test } from '@japa/runner'
import { fileKey, parseSubject } from '#lib/subject/index'
import { parseXrefGroups } from '#lib/nntp/xref'
import { inferTotalParts } from '#lib/yenc/index'

test.group('subject / parseSubject', () => {
  test('parses file counter, filename and segment counter', ({ assert }) => {
    assert.deepEqual(parseSubject('. - [09/51] - "obrMkrDeLmbhaouwYO34.part08.rar" yEnc (56/274)'), {
      name: 'obrMkrDeLmbhaouwYO34.part08.rar',
      segment: 56,
      totalSegments: 274,
      fileIndex: 9,
      fileTotal: 51,
      base: '. - [09/51] - "obrMkrDeLmbhaouwYO34.part08.rar" yEnc',
    })
  })

  test('handles a file size after the segment counter', ({ assert }) => {
    const subject = '[8/9] - "x.tar.zst.vol063+064.par2" yEnc (37/72) 51315352'
    const parsed = parseSubject(subject)!
    assert.equal(parsed.segment, 37)
    assert.equal(parsed.totalSegments, 72)
    assert.equal(parsed.base, '[8/9] - "x.tar.zst.vol063+064.par2" yEnc 51315352')
  })

  test('ignores counters inside the filename', ({ assert }) => {
    const parsed = parseSubject('"Show (1/2) Special.mkv" yEnc (3/10)')!
    assert.equal(parsed.name, 'Show (1/2) Special.mkv')
    assert.equal(parsed.segment, 3)
    assert.equal(parsed.totalSegments, 10)
  })

  test('the base is equal for all segments of one file', ({ assert }) => {
    const a = parseSubject('[1/9] - "a.tar.zst" yEnc (253/1000) 716554110')!
    const b = parseSubject('[1/9] - "a.tar.zst" yEnc (254/1000) 716554110')!
    assert.equal(a.base, b.base)
  })

  test('returns null for obfuscated or invalid subjects', ({ assert }) => {
    assert.isNull(parseSubject('GZFDJc0hB3Y0FwwAznkk'))
    assert.isNull(parseSubject('"name.rar" yEnc'))
    assert.isNull(parseSubject('"name.rar" yEnc (0/5)'))
    assert.isNull(parseSubject('"name.rar" yEnc (6/5)'))
    assert.isNull(parseSubject('"" yEnc (1/5)'))
  })
})

test.group('subject / fileKey', () => {
  test('differs per poster and per segment count, is stable otherwise', ({ assert }) => {
    const key = fileKey('poster@a', '"x.rar" yEnc', 10)
    assert.lengthOf(key, 40)
    assert.equal(key, fileKey('poster@a', '"x.rar" yEnc', 10))
    assert.notEqual(key, fileKey('poster@b', '"x.rar" yEnc', 10))
    assert.notEqual(key, fileKey('poster@a', '"x.rar" yEnc', 11))
  })
})

test.group('nntp / parseXrefGroups', () => {
  test('extracts crossposted groups', ({ assert }) => {
    assert.deepEqual(
      parseXrefGroups('news.eweka.nl alt.binaries.nl:35801424104 alt.binaries.test:27275430913'),
      ['alt.binaries.nl', 'alt.binaries.test']
    )
    assert.deepEqual(parseXrefGroups(undefined), [])
  })
})

test.group('yenc / inferTotalParts', () => {
  const size = 104857600
  const partSize = 384000

  test('uses total= when present', ({ assert }) => {
    assert.equal(inferTotalParts({ begin: { part: 2, total: 7, line: 128, size, name: 'a' } }), 7)
  })

  test('derives the total from the part size for middle and last parts', ({ assert }) => {
    const expected = Math.ceil(size / partSize) // 274, as in the subject "(56/274)"
    assert.equal(expected, 274)
    assert.equal(
      inferTotalParts({
        begin: { part: 56, line: 128, size, name: 'a' },
        part: { begin: 21120001, end: 21504000 },
      }),
      expected
    )
    assert.equal(
      inferTotalParts({
        begin: { part: 274, line: 128, size, name: 'a' },
        part: { begin: 273 * partSize + 1, end: size },
      }),
      274
    )
  })

  test('single-part posts have one part', ({ assert }) => {
    assert.equal(inferTotalParts({ begin: { line: 128, size: 10, name: 'a' } }), 1)
  })
})

test.group('indexer / skipBodyMessageIds', () => {
  test('matches the multi-group uploader, not other posts', async ({ assert }) => {
    const { default: indexerConfig } = await import('#config/indexer')
    const skip = (id: string) => indexerConfig.skipBodyMessageIds.some((re) => re.test(id))
    assert.isTrue(skip('<b800526$4db823e$6544066@d810c77fc0.d15fa>'))
    assert.isFalse(skip('<Part56of274.4B8CB0C9360F4548AB800FEDCB39CE07@1790532933.local>'))
    assert.isFalse(skip('<a6a525b170f44d68a756f1ba6fbd4c60@ngPost>'))
  })
})