"""Python State Changes"""
from random import choice, shuffle
from sys import maxsize
import datasets
import json


_DESCRIPTION = """\
Python state changes from a single line of code.
"""
_FEATURES = datasets.Features(
    {
        "start": datasets.Value("string"),
        "code": datasets.Value("string"),
        "end": datasets.Value("string"),
    }
)
_DATA_URL = {
    'default': "https://huggingface.co/datasets/Fraser/python-state-changes/resolve/main/data.jsonl",
    'mini': "https://huggingface.co/datasets/Fraser/python-state-changes/resolve/main/data.mini.jsonl"
}
_LICENSE = "MIT License"


class PythonStateChanges(datasets.GeneratorBasedBuilder):
    """Program Synthesis dataset from dreamcoder."""

    VERSION = datasets.Version("1.1.0")
    BUILDER_CONFIGS = [
        datasets.BuilderConfig(version=VERSION),
        datasets.BuilderConfig(
            name="mini", version=VERSION, description="100k subset of the dataset."
        ),
    ]
    DEFAULT_CONFIG_NAME = "default"

    def _info(self):
        return datasets.DatasetInfo(
            description=_DESCRIPTION,
            features=_FEATURES,
            license=_LICENSE,
        )

    def _split_generators(self, dl_manager):
        data_path = dl_manager.download(_DATA_URL[self.config.name])
        return [
            datasets.SplitGenerator(
                name=datasets.Split.TRAIN, gen_kwargs={'path': data_path}
            ),
        ]

    def _generate_examples(self, path):
        with open(path, 'r', encoding="utf-8") as f:
            for id_, line in enumerate(f):
                yield id_, json.loads(line)