import csv
import datasets

_CITATION = """"""
_DESCRIPTION = """"""
_LICENSE = "CC-BY-SA-4.0"
# _URL = "https://github.com/boostcampaitech2/data-annotation-nlp-level3-nlp-14"
_DATA_URLS = {
    "train": "https://huggingface.co/datasets/raki-1203/ai_hub_summarization/resolve/main/train.tsv",
    "dev": "https://huggingface.co/datasets/raki-1203/ai_hub_summarization/resolve/main/valid.tsv",
}

_VERSION = "0.0.0"


class AiHubSummarizationConfig(datasets.BuilderConfig):
    def __init__(self, data_url, **kwargs):
        super().__init__(version=datasets.Version(_VERSION), **kwargs)
        self.data_url = data_url


class AiHubSummarization(datasets.GeneratorBasedBuilder):
    DEFAULT_CONFIG_NAME = "ai_hub_summarization"
    BUILDER_CONFIGS = [
        AiHubSummarizationConfig(
            name="ai_hub_summarization",
            data_url=_DATA_URLS,
            description=_DESCRIPTION,
        )
    ]

    def _info(self):
        return datasets.DatasetInfo(
            description=_DESCRIPTION,
            features=datasets.Features(
                {
                    "data_name": datasets.Value("string"),
                    "doc_id": datasets.Value("string"),
                    "passage_id": datasets.Value("string"),
                    "doc_name": datasets.Value("string"),
                    "passage": datasets.Value("string"),
                    "abstract_summary": datasets.Value("string"),
                    "extract_summary": datasets.Value("string"),
                }
            ),
            license=_LICENSE,
            citation=_CITATION,
            supervised_keys=None,
        )

    def _split_generators(self, dl_manager):
        """ Returns SplitGenerators. """
        data_file = dl_manager.download_and_extract(self.config.data_url)
        return [
            datasets.SplitGenerator(
                name=datasets.Split.TRAIN,
                gen_kwargs={
                    "data_file": data_file["train"],
                    "split": "train",
                },
            ),
            datasets.SplitGenerator(
                name=datasets.Split.VALIDATION,
                gen_kwargs={
                    "data_file": data_file["dev"],
                    "split": "valid",
                },
            ),
        ]

    def _generate_examples(self, data_file: str, split: str):
        """ Yields examples. """
        with open(data_file, newline='', encoding="UTF-8") as csvfile:
            reader = csv.reader(csvfile, delimiter='\t')
            feature_names = next(reader)
            idx = 0
            for row in reader:
                if idx == 0:
                    continue
                features = {
                    "data_name": row[0],
                    "doc_id": row[1],
                    "passage_id": row[2],
                    "doc_name": row[3],
                    "passage": row[4],
                    "abstract_summary": row[5],
                    "extract_summary": row[6],
                }
                yield idx, features
                idx += 1