"""Yandex.Q questions and answers dataset"""


import json

import datasets

_DESCRIPTION = """\
This is a dataset of questions and answers scraped from Yandex.Q.
"""

_HOMEPAGE = "https://huggingface.co/datasets/its5Q/yandex-q"

_LICENSE = "cc0-1.0"

_URLS = [
    "https://huggingface.co/datasets/its5Q/yandex-q/resolve/main/answers.jsonl.gz"
]


class YandexQ(datasets.GeneratorBasedBuilder):
    VERSION = datasets.Version("0.1.0")

    def _info(self):
        return datasets.DatasetInfo(
            description=_DESCRIPTION,
            features=datasets.Features(
                {
                    "description": datasets.Value("string"),
                    "question": datasets.Value("string"),
                    "answer": datasets.Value("string")
                }
            ),
            homepage=_HOMEPAGE,
            license=_LICENSE
        )

    def _split_generators(self, dl_manager):
        data_dir = dl_manager.download_and_extract(_URLS)
        return [
            datasets.SplitGenerator(
                name=datasets.Split.TRAIN,
                gen_kwargs={
                    "filepath": data_dir[0],
                    "split": "train",
                },
            )
        ]

    def _generate_examples(self, filepath, split):
        with open(filepath, 'r', encoding="utf-8") as f:
            for i, line in enumerate(f):
                data = json.loads(line)
                if data['description'] is None:
                    data['description'] = ''
                yield i, data