"""Gradio demo for denoisers."""
import gradio as gr
import numpy as np
import torch
import torchaudio
from denoisers import WaveUNetModel
from tqdm import tqdm

MODELS = ["wrice/waveunet-vctk-48khz", "wrice/waveunet-vctk-24khz"]


def main():
    """Main."""
    iface = gr.Interface(
        fn=denoise,
        inputs=[gr.Dropdown(choices=MODELS, default=MODELS[0]), "audio"],
        outputs="audio",
    )
    iface.launch()


def denoise(model_name, inputs):
    """Denoise audio."""
    model = WaveUNetModel.from_pretrained(model_name)
    sr, audio = inputs
    audio = torch.from_numpy(audio)[None]
    audio = audio / 32768.0

    print(f"Audio shape: {audio.shape}")
    print(f"Sample rate: {sr}")

    if sr != model.config.sample_rate:
        audio = torchaudio.functional.resample(audio, sr, model.config.sample_rate)

    chunk_size = model.config.max_length

    padding = abs(audio.size(-1) % chunk_size - chunk_size)
    padded = torch.nn.functional.pad(audio, (0, padding))

    clean = []
    for i in tqdm(range(0, padded.shape[-1], chunk_size)):
        audio_chunk = padded[:, i : i + chunk_size]
        with torch.no_grad():
            clean_chunk = model(audio_chunk[None]).logits
        clean.append(clean_chunk.squeeze(0))

    denoised = torch.concat(clean).flatten()[: audio.shape[-1]].clamp(-1.0, 1.0)
    denoised = (denoised * 32767.0).numpy().astype(np.int16)

    print(f"Denoised shape: {denoised.shape}")

    return model.config.sample_rate, denoised


if __name__ == "__main__":
    main()