import json
import csv
import os
import datasets

logger = datasets.logging.get_logger(__name__)

_DESCRIPTION = """
This is legal-mc4 polish dataset. This dump is converted from parquet format.
"""
_SPLITS = ["corpus"]

_URLs = {
    "corpus": "corpus.jsonl.gz"
}

class PolishLegalMC4(datasets.GeneratorBasedBuilder):
    BUILDER_CONFIGS = [
        datasets.BuilderConfig(
            name="corpus", 
            description=_DESCRIPTION
        )
    ]
    
    def _info(self):
        return datasets.DatasetInfo(
            description=_DESCRIPTION,
             features=datasets.Features({
                "url": datasets.Value("string"), 
                "timestamp": datasets.Value("string"),
                # "matches": datasets.Sequence(datasets.Value("string")),
                "matches": datasets.Value("string"),
                "text": datasets.Value("string"),
             }),
            supervised_keys=None,
        )

    def _split_generators(self, dl_manager):
        my_urls = _URLs[self.config.name]
        data_dir = dl_manager.download_and_extract(my_urls)

        return [
            datasets.SplitGenerator(
                name=self.config.name,
                gen_kwargs={"filepath": data_dir},
            ),
        ]

    def _generate_examples(self, filepath):
        with open(filepath, encoding="utf-8") as f:
            texts = f.readlines()
        
        for i, text in enumerate(texts):
            text = json.loads(text)
            yield i, text