"""TALN Archives benchmark dataset for keyphrase extraction an generation."""

import csv
import json
import os
import datasets

# TODO: Add BibTeX citation
# Find for instance the citation on arxiv or on the dataset repo/website
_CITATION = """\
@inproceedings{boudin-2013-taln,
    title = "{TALN} Archives : a digital archive of {F}rench research articles in Natural Language Processing ({TALN} Archives : une archive num{\'e}rique francophone des articles de recherche en Traitement Automatique de la Langue) [in {F}rench]",
    author = "Boudin, Florian",
    booktitle = "Proceedings of TALN 2013 (Volume 2: Short Papers)",
    month = jun,
    year = "2013",
    address = "Les Sables d{'}Olonne, France",
    publisher = "ATALA",
    url = "https://aclanthology.org/F13-2001",
    pages = "507--514",
}
"""

# You can copy an official description
_DESCRIPTION = """\
TALN Archives benchmark dataset for keyphrase extraction an generation.
"""

# TODO: Add a link to an official homepage for the dataset here
_HOMEPAGE = "https://aclanthology.org/F13-2001.pdf"

# TODO: Add the licence for the dataset here if you can find it
_LICENSE = "Apache 2.0 License"

# TODO: Add link to the official dataset URLs here
# The HuggingFace Datasets library doesn't host the datasets but only points to the original files.
# This can be an arbitrary nested dict/list of URLs (see below in `_split_generators` method)
_URLS = {
    "test": "test.jsonl"
}

# TODO: Name of the dataset usually match the script name with CamelCase instead of snake_case
class TALNArchives(datasets.GeneratorBasedBuilder):
    """TODO: Short description of my dataset."""

    VERSION = datasets.Version("1.0.0")

    # This is an example of a dataset with multiple configurations.
    # If you don't want/need to define several sub-sets in your dataset,
    # just remove the BUILDER_CONFIG_CLASS and the BUILDER_CONFIGS attributes.

    # If you need to make complex sub-parts in the datasets with configurable options
    # You can create your own builder configuration class to store attribute, inheriting from datasets.BuilderConfig
    # BUILDER_CONFIG_CLASS = MyBuilderConfig

    # You will be able to load one or the other configurations in the following list with
    # data = datasets.load_dataset('my_dataset', 'first_domain')
    # data = datasets.load_dataset('my_dataset', 'second_domain')
    BUILDER_CONFIGS = [
        datasets.BuilderConfig(name="raw", version=VERSION, description="This part of my dataset covers the raw data."),
    ]

    DEFAULT_CONFIG_NAME = "raw"  # It's not mandatory to have a default configuration. Just use one if it make sense.

    def _info(self):
        # TODO: This method specifies the datasets.DatasetInfo object which contains informations and typings for the dataset
        if self.config.name == "raw":  # This is the name of the configuration selected in BUILDER_CONFIGS above
            features = datasets.Features(
                {
                    "id": datasets.Value("string"),
                    "title": datasets.Value("string"),
                    "abstract": datasets.Value("string"),
                    "keyphrases": datasets.features.Sequence(datasets.Value("string")),
                    "prmu": datasets.features.Sequence(datasets.Value("string")),
                    "translation": datasets.features.Sequence(datasets.Value("string")),
                }
            )
        return datasets.DatasetInfo(
            # This is the description that will appear on the datasets page.
            description=_DESCRIPTION,
            # This defines the different columns of the dataset and their types
            features=features,  # Here we define them above because they are different between the two configurations
            # If there's a common (input, target) tuple from the features, uncomment supervised_keys line below and
            # specify them. They'll be used if as_supervised=True in builder.as_dataset.
            # supervised_keys=("sentence", "label"),
            # Homepage of the dataset for documentation
            homepage=_HOMEPAGE,
            # License for the dataset if available
            license=_LICENSE,
            # Citation for the dataset
            citation=_CITATION,
        )

    def _split_generators(self, dl_manager):
        # TODO: This method is tasked with downloading/extracting the data and defining the splits depending on the configuration
        # If several configurations are possible (listed in BUILDER_CONFIGS), the configuration selected by the user is in self.config.name

        # dl_manager is a datasets.download.DownloadManager that can be used to download and extract URLS
        # It can accept any type or nested list/dict and will give back the same structure with the url replaced with path to local files.
        # By default the archives will be extracted and a path to a cached folder where they are extracted is returned instead of the archive
        urls = _URLS
        data_dir = dl_manager.download_and_extract(urls)
        return [
            datasets.SplitGenerator(
                name=datasets.Split.TEST,
                # These kwargs will be passed to _generate_examples
                gen_kwargs={
                    "filepath": os.path.join(data_dir["test"]),
                    "split": "test"
                },
            ),
        ]

    # method parameters are unpacked from `gen_kwargs` as given in `_split_generators`
    def _generate_examples(self, filepath, split):
        # TODO: This method handles input defined in _split_generators to yield (key, example) tuples from the dataset.
        # The `key` is for legacy reasons (tfds) and is not important in itself, but must be unique for each example.
        with open(filepath, encoding="utf-8") as f:
            for key, row in enumerate(f):
                data = json.loads(row)
                # Yields examples as (key, example) tuples
                yield key, {
                    "id": data["id"],
                    "title": data["title"],
                    "abstract": data["abstract"],
                    "keyphrases":  data["keyphrases"],
                    "prmu": data["prmu"],
                    "translation": data["translation"],
                }