import datasets
import numpy as np
import pandas as pd
import hickle as hkl
from pathlib import Path

_CITATION = """\
@InProceedings{huggingface:dataset,
title = {rsna-atd},
author = {Yeow Zi Qin},
year = {2023}
}
"""

_DESCRIPTION = """\
The dataset is the processed version of Kaggle Competition: RSNA 2023 Abdominal Trauma Detection.
It comprises of segmentation of 205 series of CT scans with 5 classes (liver, spleen, right_kidney, 
left_kidney, bowel).
"""

_NAME = "rsna-atd"

_HOMEPAGE = f"https://huggingface.co./datasets/ziq/{_NAME}"

_LICENSE = "MIT"

_DATA = f"https://huggingface.co./datasets/ziq/{_NAME}/resolve/main/data/"


class RSNAATD(datasets.GeneratorBasedBuilder):
    def _info(self):
        return datasets.DatasetInfo(
            description=_DESCRIPTION,
            features=datasets.Features(
                {
                    # "test": datasets.Value("string"),
                    "patient_id": datasets.Value("int64"),
                    "series_id": datasets.Value("int64"),
                    "image_path": datasets.Value("string"),
                    "mask_path": datasets.Value("string"),
                    # "image": datasets.Array3D(shape=(None, 512, 512), dtype="uint8"),
                    # "mask": datasets.Array3D(shape=(None, 512, 512), dtype="uint8"),
                    "aortic_hu": datasets.Value("float64"),
                    "incomplete_organ": datasets.Value("int64"),
                    "bowel_healthy": datasets.Value("int64"),
                    "bowel_injury": datasets.Value("int64"),
                    "extravasation_healthy": datasets.Value("int64"),
                    "extravasation_injury": datasets.Value("int64"),
                    "kidney_healthy": datasets.Value("int64"),
                    "kidney_low": datasets.Value("int64"),
                    "kidney_high": datasets.Value("int64"),
                    "liver_healthy": datasets.Value("int64"),
                    "liver_low": datasets.Value("int64"),
                    "liver_high": datasets.Value("int64"),
                    "spleen_healthy": datasets.Value("int64"),
                    "spleen_low": datasets.Value("int64"),
                    "spleen_high": datasets.Value("int64"),
                    "any_injury": datasets.Value("int64"),
                }
            ),
            supervised_keys=None,
            homepage=_HOMEPAGE,
            citation=_CITATION,
        )

    def _split_generators(self, dl_manager):
        train_images = dl_manager.download_and_extract(f"{_DATA}images.zip")
        train_masks = dl_manager.download_and_extract(f"{_DATA}masks.zip")

        metadata = dl_manager.download(f"{_DATA}metadata.csv")
        train_images = dl_manager.iter_files(train_images)
        train_masks = dl_manager.iter_files(train_masks)

        return [
            datasets.SplitGenerator(
                name=datasets.Split.TRAIN,
                gen_kwargs={
                    "images": train_images,
                    "masks": train_masks,
                    "metadata": metadata,
                },
            ),
        ]

    def _generate_examples(self, images, masks, metadata):
        df = pd.read_csv(metadata)
        # yield 0, {
        #         "test": images
        #     }
        # return
        # for i, image in enumerate(images):
        #     # image_path = Path(image).name
        #     # test = hkl.load(image_path)
        #     yield i, {
        #         "test": image
        #     }
        # return
        for idx, (image_path, mask_path) in enumerate(zip(sorted(images), sorted(masks))):
            data = df.loc[df["path"] == Path(image_path).name].to_numpy()[0]
            # image, mask = [hkl.load(image_path)], [hkl.load(mask_path)]
            (
                patient_id,
                series_id,
                aortic_hu,
                incomplete_organ,
                bowel_healthy,
                bowel_injury,
                extravasation_healthy,
                extravasation_injury,
                kidney_healthy,
                kidney_low,
                kidney_high,
                liver_healthy,
                liver_low,
                liver_high,
                spleen_healthy,
                spleen_low,
                spleen_high,
                any_injury,
            ) = data[1:]

            yield idx, {
                "patient_id": patient_id,
                "series_id": series_id,
                "image_path": image_path,
                "mask_path": mask_path,
                "aortic_hu": aortic_hu,
                "incomplete_organ": incomplete_organ,
                "bowel_healthy": bowel_healthy,
                "bowel_injury": bowel_injury,
                "extravasation_healthy": extravasation_healthy,
                "extravasation_injury": extravasation_injury,
                "kidney_healthy": kidney_healthy,
                "kidney_low": kidney_low,
                "kidney_high": kidney_high,
                "liver_healthy": liver_healthy,
                "liver_low": liver_low,
                "liver_high": liver_high,
                "spleen_healthy": spleen_healthy,
                "spleen_low": spleen_low,
                "spleen_high": spleen_high,
                "any_injury": any_injury,
            }