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#     http://www.apache.org/licenses/LICENSE-2.0
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# Lint as: python3
"""Detecing which tweets showcase hate or racist remarks."""


import csv

import datasets
from datasets.tasks import TextClassification


_DESCRIPTION = """\
The objective of this task is to detect hate speech in tweets. For the sake of simplicity, we say a tweet contains hate speech if it has a racist or sexist sentiment associated with it. So, the task is to classify racist or sexist tweets from other tweets.

Formally, given a training sample of tweets and labels, where label ‘1’ denotes the tweet is racist/sexist and label ‘0’ denotes the tweet is not racist/sexist, your objective is to predict the labels on the given test dataset.
"""

_HOMEPAGE = "https://github.com/sharmaroshan/Twitter-Sentiment-Analysis"

_CITATION = """\
@InProceedings{Z
Roshan Sharma:dataset,
title = {Sentimental Analysis of Tweets for Detecting Hate/Racist Speeches},
authors={Roshan Sharma},
year={2018}
}
"""

_URL = {
    "train": "https://raw.githubusercontent.com/sharmaroshan/Twitter-Sentiment-Analysis/master/train_tweet.csv",
    "test": "https://raw.githubusercontent.com/sharmaroshan/Twitter-Sentiment-Analysis/master/test_tweets.csv",
}


class TweetsHateSpeechDetection(datasets.GeneratorBasedBuilder):
    """Detecting which tweets showcase hate or racist remarks."""

    def _info(self):
        return datasets.DatasetInfo(
            description=_DESCRIPTION,
            features=datasets.Features(
                {
                    "label": datasets.ClassLabel(names=["no-hate-speech", "hate-speech"]),
                    "tweet": datasets.Value("string"),
                }
            ),
            homepage=_HOMEPAGE,
            citation=_CITATION,
            task_templates=[TextClassification(text_column="tweet", label_column="label")],
        )

    def _split_generators(self, dl_manager):
        path = dl_manager.download(_URL)
        return [
            datasets.SplitGenerator(name=datasets.Split.TRAIN, gen_kwargs={"filepath": path["train"]}),
            datasets.SplitGenerator(name=datasets.Split.TEST, gen_kwargs={"filepath": path["test"]}),
        ]

    def _generate_examples(self, filepath):
        """Generate Tweet examples."""
        with open(filepath, encoding="utf-8") as csv_file:
            csv_reader = csv.DictReader(
                csv_file, quotechar='"', delimiter=",", quoting=csv.QUOTE_ALL, skipinitialspace=True
            )
            for id_, row in enumerate(csv_reader):
                yield id_, {
                    "label": int(row.setdefault("label", -1)),
                    "tweet": row["tweet"],
                }