#!/usr/bin/python3
# -*- coding: utf-8 -*-
from glob import glob
import json
import os
from pathlib import Path

import datasets


_URLS = {
    "faq": "data/faq.json",
    "product": "data/product.jsonl",
}


_CITATION = """\
@dataset{e_commerce_customer_service,
  author       = {Xing Tian},
  title        = {e_commerce_customer_service},
  month        = aug,
  year         = 2023,
  publisher    = {Xing Tian},
  version      = {1.0},
}
"""


class ECommerceCustomerService(datasets.GeneratorBasedBuilder):
    VERSION = datasets.Version("1.0.0")

    BUILDER_CONFIGS = [
        datasets.BuilderConfig(name="faq", version=VERSION, description="faq"),
        datasets.BuilderConfig(name="product", version=VERSION, description="product"),
    ]

    def _info(self):
        if self.config.name == "faq":
            features = datasets.Features(
                {
                    "url": datasets.Value("string"),
                    "question": datasets.Value("string"),
                    "answer": datasets.Value("string"),
                    "label": datasets.Value("string"),
                }
            )
        elif self.config.name == "product":
            features = datasets.Features(
                {
                    "title": datasets.Value("string"),
                    "brand": datasets.Value("string"),
                    "review": datasets.Value("string"),
                    "description": datasets.Value("string"),
                    "mpn": datasets.Value("string"),
                    "color": datasets.Sequence(datasets.Value("string")),
                    "size": datasets.Sequence(datasets.Value("string")),
                    "sku": datasets.Value("string"),
                    "ratingValue": datasets.Value("float32"),
                    "reviewCount": datasets.Value("int64"),
                    "overview": datasets.Value("string"),
                    "category": datasets.Value("string"),
                    "url": datasets.Value("string"),
                }
            )
        else:
            raise NotImplementedError

        return datasets.DatasetInfo(
            features=features,
            supervised_keys=None,
            homepage="",
            license="",
            citation=_CITATION,
        )

    def _split_generators(self, dl_manager):
        """Returns SplitGenerators."""
        url = _URLS[self.config.name]
        dl_path = dl_manager.download_and_extract(url)
        archive_path = dl_path

        return [
            datasets.SplitGenerator(
                name=datasets.Split.TRAIN,
                gen_kwargs={"archive_path": archive_path, "split": "train"},
            ),
        ]

    def _generate_faq(self, archive_path, split):
        archive_path = Path(archive_path)

        with open(archive_path, "r", encoding="utf-8") as f:
            faq = json.load(f)

        idx = 0
        for qa in faq:
            yield idx, {
                "url": qa["url"],
                "question": qa["question"],
                "answer": qa["answer"],
                "label": qa["label"],
            }
            idx += 1

    def _generate_product(self, archive_path, split):
        archive_path = Path(archive_path)

        idx = 0
        with open(archive_path, "r", encoding="utf-8") as f:
            for row in f:
                row = json.loads(row)

                yield idx, {
                    "title": row["title"],
                    "brand": row["brand"],
                    "review": row["review"],
                    "description": row["description"],
                    "mpn": row["mpn"],
                    "color": row["color"],
                    "size": row["size"],
                    "sku": row["sku"],
                    "ratingValue": float(row["ratingValue"]) if row["ratingValue"] is not None else None,
                    "reviewCount": int(row["reviewCount"]) if row["reviewCount"] is not None else None,
                    "overview": row["overview"],
                    "category": row["category"],
                    "url": row["url"],
                }
                idx += 1

    def _generate_examples(self, archive_path, split):
        """Yields examples."""
        if self.config.name == "faq":
            return self._generate_faq(archive_path, split)
        elif self.config.name == "product":
            return self._generate_product(archive_path, split)
        else:
            raise NotImplementedError


if __name__ == '__main__':
    pass