""" Dataloader for Caissabase's chess games. """

import os
import csv
import json
import datasets

# FILEPATH = "./chess_games_caissabase.jsonl"
FILEPATH = "https://huggingface.co/datasets/mapama247/chess_games_caissabase/resolve/main/chess_games_caissabase.jsonl"

class ChessGamesCaissabase(datasets.GeneratorBasedBuilder):

    def _info(self):
        features = datasets.Features(
            {
                "moves":     datasets.Value("string"),
                "length":    datasets.Value("int32"),
                "result":    datasets.Value("string"),
                "checkmate": datasets.Value("bool"),
            }
        )

        return datasets.DatasetInfo(features=features)

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

    def _generate_examples(self, filepath, split):
        with open(filepath, encoding="utf-8") as f:
            for key, row in enumerate(f):
                data = json.loads(row)
                yield key, {
                    "moves":     data["moves"],
                    "length":    data["length"],
                    "result":    data["result"],
                    "checkmate": data["checkmate"],
                }