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# coding=utf-8
# Copyright 2020 The HuggingFace Datasets Authors and the current dataset script contributor.
#
# Licensed under the Apache License, Version 2.0 (the 'License');
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an 'AS IS' BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Lint as: python3

import json

import datasets
from dataclasses import dataclass

_CITATION = '''
coming soon ...
'''

languages = [
    'english',
    'french',
]

_DESCRIPTION = '100 token long Wikipedia Passages from April/May 2022'

_DATASET_URLS = {
    lang: {
        'collection': f'https://huggingface.co/datasets/ToluClassics/masakhane_wiki_100/resolve/main/masakhane_wiki_100-{lang}/corpus.jsonl',
    } for lang in languages
}


class MrTyDiCorpus(datasets.GeneratorBasedBuilder):
    BUILDER_CONFIGS = [
        datasets.BuilderConfig(
            version=datasets.Version('1.1.0'),
            name=lang, 
            description=f'Wikipedia Passages in language {lang}.'
        ) for lang in languages
    ]

    def _info(self):
        features = datasets.Features({
            'docid': datasets.Value('string'), 
            'text': datasets.Value('string'),
            'title': 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
            supervised_keys=None,
            # Homepage of the dataset for documentation
            homepage='https://huggingface.co/datasets/ToluClassics/masakhane_wiki_100',
            # License for the dataset if available
            license='',
            # Citation for the dataset
            citation=_CITATION,
        )

    def _split_generators(self, dl_manager):
        lang = self.config.name
        downloaded_files = dl_manager.download_and_extract(_DATASET_URLS[lang])

        splits = [
            datasets.SplitGenerator(
                name='collection',
                gen_kwargs={
                    'filepath': downloaded_files['collection'],
                },
            ),
        ]
        return splits

    def _generate_examples(self, filepath):
        with open(filepath, encoding="utf-8") as f:
            for line in f:
                data = json.loads(line)
                yield data['docid'], data