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from io import StringIO

import gradio as gr
import pandas as pd
from datasets import ClassLabel, Dataset, Image
from httpx import Client
from huggingface_hub import DatasetCard

client = Client()
USER_DATA = {}


def update_user_data(api_key, space_url, hub_api_key, hub_dataset_id):
    USER_DATA["api_key"] = api_key
    USER_DATA["space_url"] = space_url
    USER_DATA["hub_api_key"] = hub_api_key
    USER_DATA["hub_dataset_id"] = hub_dataset_id


def check_user_data():
    return bool(USER_DATA.get("api_key") and USER_DATA.get("space_url"))


# def list_projects():
#     headers = {"Authorization": f'Token {USER_DATA["api_key"]}'}
#     resp = client.get(
#         "https://davanstrien-label-studio.hf.space/api/projects/", headers=headers
#     )
#     return resp.json()


# def get_column_names():
#     headers = {"Authorization": f'Token {USER_DATA["api_key"]}'}
#     print(headers)
#     # resp = client.get(
#     #     "http://davanstrien-label-studio.hf.space/api/projects/1/export?exportType=CSV",
#     #     headers=headers,
#     # )
#     resp = requests.get(
#         "http://davanstrien-label-studio.hf.space/api/projects/1/export?exportType=CSV",
#         headers=headers,
#     )
#     return pd.read_csv(StringIO(resp.text)).columns.tolist()


def convert_value(value: int) -> str:
    if value < 1_000:
        return "n<1K"
    elif value < 10_000:
        return "1K<n<10K"
    elif value < 100_000:
        return "10K<n<100K"
    elif value < 1_000_000:
        return "100K<n<1M"
    elif value < 10_000_000:
        return "1M<n<10M"
    elif value < 100_000_000:
        return "10M<n<100M"
    elif value < 1_000_000_000:
        return "100M<n<1B"
    elif value < 10_000_000_000:
        return "1B<n<10B"
    elif value < 100_000_000_000:
        return "10B<n<100B"
    elif value < 1_000_000_000_000:
        return "100B<n<1T"
    else:
        return "n>1T"


def push_annotations_to_hub(project_id, input_column, input_column_type, label_column):
    headers = {"Authorization": f'Token {USER_DATA["api_key"]}'}
    resp = client.get(
        f"{USER_DATA['space_url']}/api/projects/{int(project_id)}/export?exportType=CSV",
        headers=headers,
    )
    df = pd.read_csv(StringIO(resp.text))
    print(df.head(1))
    labels = df[label_column].unique().tolist()
    ds = Dataset.from_pandas(df)
    ds = ds.cast_column(label_column, ClassLabel(names=labels))
    if input_column_type == "image":
        ds = ds.cast_column(input_column, Image())
    ds.push_to_hub(USER_DATA["hub_dataset_id"], token=USER_DATA["hub_api_key"])
    card = DatasetCard.load(USER_DATA["hub_dataset_id"])
    card.data.tags = ["label-studio-exported"]
    card.data.size_categories = [convert_value(len(ds))]
    card.push_to_hub(USER_DATA["hub_dataset_id"], repo_type="dataset")
    return ds.to_pandas().head(5)


with gr.Blocks() as demo:
    gr.Markdown("# Push label studio datasets to the hub")
    gr.Markdown(
        "This is a proof of concept app which provides a GUI for exporting data from"
        " Label Studio and pushing the loaded dataset to the Hugging Face Hub"
    )
    with gr.Row():
        with gr.Column():
            with gr.Row():
                gr.Markdown("## Label Studio details")
            with gr.Row():
                gr.Markdown(
                    "Enter your Label Studio API key, you can find this under settings."
                )
            with gr.Row():
                API_KEY = gr.Textbox(
                    type="password",
                    label="Label Studio API Key",
                )
            with gr.Row():
                with gr.Row():
                    gr.Markdown(
                        "Space URL, this can be found by clicking on the three dots"
                        " button on your space and copying the URL shown after clicking"
                        " the Embed Space button"
                    )
            with gr.Row():
                SPACE_URL = gr.Textbox(
                    "e.g. https://davanstrien-label-studio.hf.space/",
                    label="Space URL",
                    placeholder="https://space.example.com",
                )
        with gr.Column():
            gr.Markdown("## Hub Dataset info")
            gr.Markdown(
                """Enter a Hub [API key](https://huggingface.co/settings/tokens) with write access and the name you would like to use for your dataset"""
            )
            HUB_API_KEY = gr.Textbox(
                type="password",
                label="Hub API Key",
            )
            with gr.Row():
                gr.Markdown("Name of the dataset you would like to create")
            with gr.Row():
                HUB_DATASET_ID = gr.Textbox(
                    "e.g. davanstrien/dataset_name",
                    label="Dataset name",
                    placeholder="https://space.example.com",
                )

    button = gr.Button("Submit details")
    button.click(update_user_data, [API_KEY, SPACE_URL, HUB_API_KEY, HUB_DATASET_ID])
    with gr.Row():
        project_id = gr.Number(1, label="Project ID")
        input_column = gr.Textbox("text", type="text", label="Input column")
        input_column_type = gr.Dropdown(
            choices=["text", "image"], label="Input column type", value="text"
        )
        label_column = gr.Textbox("choice", type="text", label="Label column")
        button = gr.Button("Push annotations to Hub")
    with gr.Row():
        gr.Markdown("## Preview of your dataset")
    with gr.Row():
        preview = gr.DataFrame()
        button.click(
            push_annotations_to_hub,
            [
                project_id,
                input_column,
                input_column_type,
                label_column,
            ],
            preview,
        )

demo.launch(debug=True)