# coding=utf-8
# Copyright 2020 The HuggingFace Datasets Authors and the current dataset script contributor.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Multilingual Bibles"""
import csv

import datasets


_CITATION = """
@InProceedings{--,
  author = {---},
  title = {---},
  booktitle = {---},
  year = 2021,
  address = "---"
}
"""

_DESCRIPTION = """\
Multilingual Bibles
"""


_HOMEPAGE = "https://github.com/versae/bibles/"

BIBLES_BASE_URI = "https://huggingface.co/datasets/versae/bibles/resolve/main"
BIBLES = {
    "validation": lambda config: f"{BIBLES_BASE_URI}/{config}_validation.csv",
    "test": lambda config: f"{BIBLES_BASE_URI}/{config}_test.csv",
    "train": lambda config: f"{BIBLES_BASE_URI}/{config}_train.csv"
}


class BiblesConfig(datasets.BuilderConfig):
    """BuilderConfig for NorNE."""

    def __init__(self, **kwargs):
        """BuilderConfig for Bibles.
        Args:
          **kwargs: keyword arguments forwarded to super.
        """
        super(BiblesConfig, self).__init__(**kwargs)


class Bibles(datasets.GeneratorBasedBuilder):
    """Bibles"""

    BUILDER_CONFIGS = [
        BiblesConfig(name="testament", version=datasets.Version("1.0.0"), description="Bibles testament dataset (full set)"),
        BiblesConfig(name="genre", version=datasets.Version("1.0.0"), description="Bibles genre dataset (full set)"),
        BiblesConfig(name="division", version=datasets.Version("1.0.0"), description="Bibles division dataset (full set)"),
    ]

    def _info(self):
        if self.config.name == "division":
            labels = [
                'Gospel',
                'Historical',
                'Letters',
                'Pentateuch',
                'Prophetic',
                'Revelation',
                'Wisdom'
            ]
            languages = [
                'ALB',
                'ARA',
                'AZB',
                'BEL',
                'BUL',
                'CEB',
                'CHI',
                'CZE',
                'DAN',
                'ENG',
                'ESP',
                'FIN',
                'FRE',
                'GER',
                'GRC',
                'HAT',
                'HEB',
                'HIN',
                'HUN',
                'ITA',
                'KOR',
                'LAT',
                'MAR',
                'NL_',
                'NOR',
                'POR',
                'RUM',
                'RUS',
                'SCR',
                'SPA',
                'SWE',
                'TAM',
                'TGL',
                'THA',
                'TUR',
                'VIE',
                'XKL',
            ]
        elif self.config.name == "genre":
            labels = [
                'apocalyptic',
                'gospel',
                'historical',
                'law',
                'letter',
                'lyric',
                'prophecy',
                'wisdom'
            ]
            languages = [
                'ALB',
                'ARA',
                'AZB',
                'BEL',
                'BUL',
                'CEB',
                'CHI',
                'CZE',
                'DAN',
                'ENG',
                'ESP',
                'FIN',
                'FRE',
                'GER',
                'GRC',
                'HAT',
                'HEB',
                'HIN',
                'HUN',
                'ITA',
                'KOR',
                'LAT',
                'MAR',
                'NL_',
                'NOR',
                'POR',
                'RUM',
                'RUS',
                'SCR',
                'SPA',
                'SWE',
                'TAM',
                'TGL',
                'THA',
                'TUR',
                'VIE',
                'XKL',
            ]
        else:   # self.config.name == "testament":
            labels = ["new", "old"]
            languages = [
                'ALB',
                'ARA',
                'AZB',
                'BEL',
                'BUL',
                'CEB',
                'CHA',
                'CHI',
                'CZE',
                'DAN',
                'ENG',
                'ESP',
                'FIN',
                'FRE',
                'GER',
                'GRC',
                'HAT',
                'HEB',
                'HIN',
                'HUN',
                'ITA',
                'KOR',
                'LAT',
                'MAR',
                'NDS',
                'NL_',
                'NOR',
                'PON',
                'POR',
                'RUM',
                'RUS',
                'SCR',
                'SPA',
                'SWE',
                'TAM',
                'TGL',
                'THA',
                'TUR',
                'VIE',
                'XKL',
            ]
        self.labels = labels
        return datasets.DatasetInfo(
            description=_DESCRIPTION,
            features=datasets.Features(
                {
                    "text": datasets.Value("string"),
                    "label": datasets.ClassLabel(names=labels),
                    "language": datasets.Value("string"),
                    "year": datasets.Value("int16"),
                    "century": datasets.Value("string"),
                    "codebook": datasets.Value("string"),
                }
            ),
            supervised_keys=None,
            homepage=_HOMEPAGE,
            citation=_CITATION,
        )

    def _split_generators(self, dl_manager):
        URLS = {key: BIBLES[key](self.config.name) for key in BIBLES.keys()}
        downloaded_files = dl_manager.download(URLS)
        return [
            datasets.SplitGenerator(name=datasets.Split.TRAIN, gen_kwargs={"filepath": downloaded_files["train"]}),
            datasets.SplitGenerator(name=datasets.Split.VALIDATION, gen_kwargs={"filepath": downloaded_files["validation"]}),
            datasets.SplitGenerator(name=datasets.Split.TEST, gen_kwargs={"filepath": downloaded_files["test"]}),
        ]

    def _generate_examples(self, filepath):
        with open(filepath, encoding="utf-8") as csv_file:
            csv_reader = csv.reader(csv_file, delimiter=",")
            next(csv_reader)  # skip header
            for idx, (text, label, language, year, century, codebook) in enumerate(csv_reader):
                yield int(idx), {
                    "text": text,
                    "label": self.labels.index(label),
                    "language": language,
                    "year": year,
                    "century": century,
                    "codebook": codebook,
                }