import json

import datasets

_DESCRIPTION = """The MBPP dataset in BabelCode format."""

_URL = "https://raw.githubusercontent.com/google-research/babelcode/main/data/hf_datasets/mbpp.jsonl"

_LANGUAGES = {
    "C++",
    "CSharp",
    "Dart",
    "Go",
    "Haskell",
    "Java",
    "Javascript",
    "Julia",
    "Kotlin",
    "Lua",
    "PHP",
    "Python",
    "R",
    "Rust",
    "Scala",
    "TypeScript",
}

_CITATION = """\
@article{orlanski2023measuring,
  title={Measuring The Impact Of Programming Language Distribution},
  author={Orlanski, Gabriel and Xiao, Kefan and Garcia, Xavier and Hui, Jeffrey and Howland, Joshua and Malmaud, Jonathan and Austin, Jacob and Singh, Rishah and Catasta, Michele},
  journal={arXiv preprint arXiv:2302.01973},
  year={2023}
}
@article{Austin2021ProgramSW,
  title={Program Synthesis with Large Language Models},
  author={Jacob Austin and Augustus Odena and Maxwell Nye and Maarten Bosma and Henryk Michalewski and David Dohan and Ellen Jiang and Carrie J. Cai and Michael Terry and Quoc V. Le and Charles Sutton},
  journal={ArXiv},
  year={2021},
  volume={abs/2108.07732}
}"""

_HOMEPAGE = "https://github.com/google-research/babelcode"

_LICENSE = "CC-BY-4.0"

_VERSION = "1.0.0"

_QUESTION_INFO_KEYS = {
    "entry_fn_name",
    "entry_cls_name",
    "test_code",
    "test_list",
    "test_case_ids",
    "commands",
    "timeouts",
    "extension"
}

class BCMBPP(datasets.GeneratorBasedBuilder):
  """BC-MBPP"""

  VERSION = datasets.Version(_VERSION)

  BUILDER_CONFIGS = [
      datasets.BuilderConfig(
          name="all",
          version=datasets.Version(_VERSION),
          description=_DESCRIPTION,
      ),
  ] + [
      datasets.BuilderConfig(
          name=lang,
          version=datasets.Version(_VERSION),
          description=_DESCRIPTION + f" Examples are only in {lang}.",
      ) for lang in _LANGUAGES
  ]

  DEFAULT_CONFIG_NAME = "all"

  def _info(self):
    list_keys = ['timeouts', 'commands', 'test_case_ids']
    question_info_type = {
                k:datasets.Value(dtype="string")
                for k in _QUESTION_INFO_KEYS if k not in list_keys
            }
    question_info_type['test_case_ids'] = datasets.Sequence(datasets.Value('string'))
    question_info_type['commands'] = datasets.Sequence(datasets.Sequence(datasets.Value('string')))
    question_info_type['timeouts'] = datasets.Sequence(datasets.Value('int32'))
    
    features = datasets.Features({
        "qid": datasets.Value("string"),
        "title": datasets.Value("string"),
        "language": datasets.Value("string"),
        "text": datasets.Value("string"),
        "signature_with_docstring": datasets.Value("string"),
        "signature": datasets.Value("string"),
        "arguments": datasets.Sequence(datasets.Value("string")),
        "solution": datasets.Value("string"),
        "question_info": datasets.Features(question_info_type)
            
    })
    description = _DESCRIPTION
    if self.config.name != 'all':
      description = _DESCRIPTION + f" Examples are only in {self.config.name}."
    return datasets.DatasetInfo(
        description=description,
        features=features,
        supervised_keys=None,
        homepage=_HOMEPAGE,
        license=_LICENSE,
        citation=_CITATION,
    )

  def _split_generators(self, dl_manager):
    """Returns SplitGenerators."""
    data_dir = dl_manager.download_and_extract(_URL)
    return [
        datasets.SplitGenerator(
            name=datasets.Split.TRAIN,
            gen_kwargs={
                "filepath": data_dir,
                "split": "train"
            },
        ),
        datasets.SplitGenerator(
            name=datasets.Split.TEST,
            gen_kwargs={
                "filepath": data_dir,
                "split": "test"
            },
        ),
        datasets.SplitGenerator(
            name=datasets.Split.VALIDATION,
            gen_kwargs={
                "filepath": data_dir,
                "split": "validation"
            },
        ),
        datasets.SplitGenerator(
            name=datasets.Split("prompt"),
            gen_kwargs={
                "filepath": data_dir,
                "split": "prompt"
            },
        ),
    ]

  def _generate_examples(self, filepath, split):
    """ Yields the examples from the dataset"""
    with open(filepath, encoding='utf-8') as file:
      id_ = 0
      idx_range = None
      if split == 'test':
        idx_range = (11, 510)
      elif split == "train":
        idx_range = (601, 974)
      elif split == "validation":
        idx_range = (511, 600)
      else:
        idx_range = (1, 10)

      for l in file:
        if not l.strip():
          continue
        d = json.loads(l)

        if self.config.name != 'all' and d['language'] != self.config.name:
          continue

        idx = int(d['title'].split('/')[-1])
        if not (idx_range[0] <= idx <= idx_range[1]):
          continue
        
        question_info = {}
        for k in _QUESTION_INFO_KEYS:
          question_info[k] = d.pop(k)
        
        question_info['test_list'] = json.dumps(question_info['test_list'])

        d['question_info'] = question_info

        d['solution'] = d.pop('solution_python')
        yield id_, d
        id_ += 1