# coding=utf-8
# Copyright 2019 The TensorFlow Datasets Authors.
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#     http://www.apache.org/licenses/LICENSE-2.0
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"""WMT14: Translate dataset."""

import tensorflow_datasets.public_api as tfds
from tensorflow_datasets.translate import wmt

_URL = "http://www.statmt.org/wmt14/translation-task.html"
_CITATION = """
@InProceedings{bojar-EtAl:2014:W14-33,
  author    = {Bojar, Ondrej  and  Buck, Christian  and  Federmann, Christian  and  Haddow, Barry  and  Koehn, Philipp  and  Leveling, Johannes  and  Monz, Christof  and  Pecina, Pavel  and  Post, Matt  and  Saint-Amand, Herve  and  Soricut, Radu  and  Specia, Lucia  and  Tamchyna, Ale\v{s}},
  title     = {Findings of the 2014 Workshop on Statistical Machine Translation},
  booktitle = {Proceedings of the Ninth Workshop on Statistical Machine Translation},
  month     = {June},
  year      = {2014},
  address   = {Baltimore, Maryland, USA},
  publisher = {Association for Computational Linguistics},
  pages     = {12--58},
  url       = {http://www.aclweb.org/anthology/W/W14/W14-3302}
}
"""

_LANGUAGE_PAIRS = [
    (lang, "en") for lang in ["cs", "de", "fr", "hi", "ru"]
]


class Wmt14Translate(wmt.WmtTranslate):
  """WMT 14 translation datasets for all {xx, "en"} language pairs."""

  BUILDER_CONFIGS = [
      wmt.WmtConfig(  # pylint:disable=g-complex-comprehension
          description="WMT 2014 %s-%s translation task dataset." % (l1, l2),
          url=_URL,
          citation=_CITATION,
          language_pair=(l1, l2),
          version=tfds.core.Version(
              "0.0.3", experiments={tfds.core.Experiment.S3: False}),
          )
      for l1, l2 in _LANGUAGE_PAIRS
  ]

  @property
  def _subsets(self):
    return {
        tfds.Split.TRAIN: [
            "europarl_v7", "commoncrawl", "multiun",
            "newscommentary_v9", "gigafren", "czeng_10", "yandexcorpus",
            "wikiheadlines_hi", "wikiheadlines_ru", "hindencorp_01"
        ],
        tfds.Split.VALIDATION: [
            "newsdev2014", "newstest2013"
        ],
        tfds.Split.TEST: [
            "newstest2014"
        ]
    }
