# coding=utf-8
# Copyright 2020 The HuggingFace Datasets Authors and the current dataset script contributor.
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#     http://www.apache.org/licenses/LICENSE-2.0
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"""OrangeSum dataset"""


import datasets


_CITATION = """\
@inproceedings{kamal-eddine-etal-2021-barthez,
    title = "{BART}hez: a Skilled Pretrained {F}rench Sequence-to-Sequence Model",
    author = "Kamal Eddine, Moussa  and
      Tixier, Antoine  and
      Vazirgiannis, Michalis",
    booktitle = "Proceedings of the 2021 Conference on Empirical Methods in Natural Language Processing",
    month = nov,
    year = "2021",
    address = "Online and Punta Cana, Dominican Republic",
    publisher = "Association for Computational Linguistics",
    url = "https://aclanthology.org/2021.emnlp-main.740",
    pages = "9369--9390",
}
"""

_DESCRIPTION = """\
The OrangeSum dataset was inspired by the XSum dataset. It was created by scraping the "Orange Actu" website: https://actu.orange.fr/. Orange S.A. is a large French multinational telecommunications corporation, with 266M customers worldwide. Scraped pages cover almost a decade from Feb 2011 to Sep 2020. They belong to five main categories: France, world, politics, automotive, and society. The society category is itself divided into 8 subcategories: health, environment, people, culture, media, high-tech, unsual ("insolite" in French), and miscellaneous.

Each article featured a single-sentence title as well as a very brief abstract, both professionally written by the author of the article. These two fields were extracted from each page, thus creating two summarization tasks: OrangeSum Title and OrangeSum Abstract.
"""

_URL_DATA = {
    "abstract": "https://raw.githubusercontent.com/Tixierae/OrangeSum/main/data/docs/splits/abstract.tgz",
    "title": "https://raw.githubusercontent.com/Tixierae/OrangeSum/main/data/docs/splits/title.tgz",
}


class OrangeSum(datasets.GeneratorBasedBuilder):
    """OrangeSum: a french abstractive summarization dataset"""

    VERSION = datasets.Version("1.1.0")

    BUILDER_CONFIGS = [
        datasets.BuilderConfig(
            name="abstract", description="Abstracts used as summaries", version=VERSION
        ),
        datasets.BuilderConfig(
            name="title", description="Titles used as summaries", version=VERSION
        ),
    ]

    def _info(self):
        return datasets.DatasetInfo(
            description=_DESCRIPTION,
            features=datasets.Features(
                {
                    "gem_id": datasets.Value("string"),
                    "input": datasets.Value("string"),
                    "target": datasets.Value("string"),
                    "references": [datasets.Value("string")],
                }
            ),
            supervised_keys=("input", "target"),
            homepage="https://github.com/Tixierae/OrangeSum/",
            citation=_CITATION,
        )

    def _split_generators(self, dl_manager):
        """Returns SplitGenerators."""
        archive = dl_manager.download(_URL_DATA[self.config.name])

        return [
            datasets.SplitGenerator(
                name=datasets.Split.TRAIN,
                # These kwargs will be passed to _generate_examples
                gen_kwargs={
                    "source_files": dl_manager.iter_archive(archive),
                    "target_files": dl_manager.iter_archive(archive),
                    "split": "train",
                },
            ),
            datasets.SplitGenerator(
                name=datasets.Split.TEST,
                # These kwargs will be passed to _generate_examples
                gen_kwargs={
                    "source_files": dl_manager.iter_archive(archive),
                    "target_files": dl_manager.iter_archive(archive),
                    "split": "test",
                },
            ),
            datasets.SplitGenerator(
                name=datasets.Split.VALIDATION,
                # These kwargs will be passed to _generate_examples
                gen_kwargs={
                    "source_files": dl_manager.iter_archive(archive),
                    "target_files": dl_manager.iter_archive(archive),
                    "split": "valid",
                },
            ),
        ]

    def _generate_examples(self, source_files, target_files, split):
        """Yields examples."""
        expected_source_path = f"{self.config.name}/{split}.source"
        expected_target_path = f"{self.config.name}/{split}.target"
        for source_path, f_source in source_files:
            if source_path == expected_source_path:
                for target_path, f_target in target_files:
                    if target_path == expected_target_path:
                        for idx, (document, summary) in enumerate(
                            zip(f_source, f_target)
                        ):
                            yield idx, {
                                "input": document.decode("utf-8"),
                                "target": summary.decode("utf-8"),
                                "references": [summary.decode("utf-8")],
                                "gem_id": f"OrangeSum_{self.config.name}-{split}-{idx}",
                            }
                        break
                break