import gradio as gr
import requests
import re
import os
import zipfile
import tempfile
from urllib.parse import urljoin

def process_url(url):
    try:
        headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36'}
        response = requests.get(url, headers=headers)
        response.raise_for_status()
    except Exception as e:
        return None, f"Erreur de connexion : {str(e)}"

    # Extraction des URLs MP3
    mp3_links = []
    pattern = r'(?:contentUrl|url)"\s*:\s*"([^"]+?\.mp3)'
    matches = re.findall(pattern, response.text)
    
    for match in matches:
        clean_url = match.split('";')[0] if '";' in match else match
        absolute_url = urljoin(response.url, clean_url)
        if absolute_url not in mp3_links:
            mp3_links.append(absolute_url)

    if not mp3_links:
        return None, "Aucun lien MP3 détecté dans le code source"

    # Téléchargement
    temp_dir = tempfile.mkdtemp()
    filenames = []
    
    for idx, mp3_url in enumerate(mp3_links, 1):
        try:
            filename = f"{idx:02d}_{os.path.basename(mp3_url).split('?')[0]}"
            filepath = os.path.join(temp_dir, filename)
            
            with requests.get(mp3_url, headers=headers, stream=True) as r:
                r.raise_for_status()
                with open(filepath, 'wb') as f:
                    for chunk in r.iter_content(chunk_size=8192):
                        if chunk:
                            f.write(chunk)
            filenames.append(filepath)
        except Exception as e:
            continue

    if not filenames:
        return None, "Échec des téléchargements"

    # Création ZIP
    zip_path = os.path.join(temp_dir, 'podcast.zip')
    with zipfile.ZipFile(zip_path, 'w') as zipf:
        for file in filenames:
            zipf.write(file, arcname=os.path.basename(file))

    return zip_path, None

def download_podcast(url):
    zip_path, error = process_url(url)
    if error:
        raise gr.Error(error)
    return zip_path

# Configuration Gradio compatible Hugging Face
with gr.Blocks() as app:
    gr.Markdown("# 📻 Téléchargeur de Podcasts Radio France")
    
    with gr.Row():
        url_input = gr.Textbox(
            label="URL de la série podcast",
            placeholder="Collez l'URL Radio France ici..."
        )
        download_btn = gr.Button("Télécharger les épisodes")
    
    output_file = gr.File(label="Fichier ZIP à télécharger")
    error_output = gr.Textbox(visible=False)
    
    examples = gr.Examples(
        examples=[[
            "https://www.radiofrance.fr/franceculture/podcasts/serie-le-secret-de-la-licorne-les-aventures-de-tintin"
        ]],
        inputs=[url_input]
    )
    
    download_btn.click(
        fn=download_podcast,
        inputs=url_input,
        outputs=output_file,
        api_name="download"
    )

# Configuration spécifique pour Hugging Face
app.launch(debug=False, show_error=True)