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"""Tests for deepvariant.labeled_examples_to_vcf."""

from absl import flags
from absl.testing import absltest
from absl.testing import flagsaver
from absl.testing import parameterized

from third_party.nucleus.io import vcf

from third_party.nucleus.testing import test_utils
from deepvariant import testdata
from deepvariant.labeler import labeled_examples_to_vcf

FLAGS = flags.FLAGS


def setUpModule():
  testdata.init()


class ExamplesToVCFUnitTest(parameterized.TestCase):

  @flagsaver.flagsaver
  def test_end2end(self):
    FLAGS.ref = testdata.CHR20_FASTA
    FLAGS.examples = testdata.GOLDEN_TRAINING_EXAMPLES + '@3'  # Sharded.
    FLAGS.output_vcf = test_utils.test_tmpfile('examples_to_vcf.vcf')

    labeled_examples_to_vcf.main(0)

    self.assertEqual(
        open(FLAGS.output_vcf).readlines(),
        open(
            testdata.deepvariant_testdata('golden.training_examples.vcf')
        ).readlines(),
    )

  @flagsaver.flagsaver
  def test_sample_name_flag(self):
    FLAGS.ref = testdata.CHR20_FASTA
    FLAGS.examples = testdata.GOLDEN_TRAINING_EXAMPLES
    FLAGS.sample_name = 'sample_name'
    FLAGS.output_vcf = test_utils.test_tmpfile('no_sample_name.vcf')

    labeled_examples_to_vcf.main(0)

    with vcf.VcfReader(FLAGS.output_vcf) as vcf_reader:
      self.assertEqual(
          list(vcf_reader.header.sample_names), [FLAGS.sample_name]
      )

  @flagsaver.flagsaver
  def test_raises_for_unlabeled_examples(self):
    FLAGS.ref = testdata.CHR20_FASTA
    FLAGS.examples = testdata.GOLDEN_CALLING_EXAMPLES
    FLAGS.output_vcf = test_utils.test_tmpfile('unlabeled.vcf')

    with self.assertRaisesRegex(
        ValueError,
        (
            'Variant .* does not have any genotypes. This tool only works with '
            'variants that have been labeled'
        ),
    ):
      labeled_examples_to_vcf.main(0)


if __name__ == '__main__':
  absltest.main()