import logging
import pathlib

import gradio as gr
import pandas as pd
from gt4sd.algorithms.generation.torchdrug import (
    TorchDrugGenerator,
    TorchDrugGCPN,
    TorchDrugGraphAF,
)

from gt4sd.algorithms.registry import ApplicationsRegistry
from utils import draw_grid_generate

logger = logging.getLogger(__name__)
logger.addHandler(logging.NullHandler())

TITLE = "MoLeR"


def run_inference(algorithm: str, algorithm_version: str, number_of_samples: int):

    if algorithm == "GCPN":
        config = TorchDrugGCPN(algorithm_version=algorithm_version)
    elif algorithm == "GraphAF":
        config = TorchDrugGraphAF(algorithm_version=algorithm_version)
    else:
        raise ValueError(f"Unsupported model {algorithm}.")

    model = TorchDrugGenerator(configuration=config)
    samples = list(model.sample(number_of_samples))

    return draw_grid_generate(samples=samples, n_cols=5)


if __name__ == "__main__":

    # Preparation (retrieve all available algorithms)
    all_algos = ApplicationsRegistry.list_available()
    algos = [
        x["algorithm_version"]
        for x in list(filter(lambda x: "TorchDrug" in x["algorithm_name"], all_algos))
    ]

    # Load metadata
    metadata_root = pathlib.Path(__file__).parent.joinpath("model_cards")

    examples = pd.read_csv(metadata_root.joinpath("examples.csv"), header=None).fillna(
        ""
    )

    with open(metadata_root.joinpath("article.md"), "r") as f:
        article = f.read()
    with open(metadata_root.joinpath("description.md"), "r") as f:
        description = f.read()

    demo = gr.Interface(
        fn=run_inference,
        title="TorchDrug (GCPN and GraphAF)",
        inputs=[
            gr.Dropdown(["GCPN", "GraphAF"], label="Algorithm", value="GCPN"),
            gr.Dropdown(
                list(set(algos)), label="Algorithm version", value="zinc250k_v0"
            ),
            gr.Slider(
                minimum=1, maximum=50, value=10, label="Number of samples", step=1
            ),
        ],
        outputs=gr.HTML(label="Output"),
        article=article,
        description=description,
        examples=examples.values.tolist(),
    )
    demo.launch(debug=True, show_error=True)