app.py

import gradio as gr
import pandas as pd
import freesound
import joblib
import xgboost as xgb

# ----------------------------
# Config Freesound
# ----------------------------
API_TOKEN = "zE9NjEOgUMzH9K7mjiGBaPJiNwJLjSM53LevarRK"
client = freesound.FreesoundClient()
client.set_token(API_TOKEN, "token")

# ----------------------------
# 1️⃣ Charger les modèles
# ----------------------------
# Music
xgb_music_num = joblib.load("xgb_num_downloads_music_model.pkl")
xgb_music_feat_num = joblib.load("xgb_num_downloads_music_features.pkl")
xgb_music_avg = joblib.load("xgb_avg_rating_music_model.pkl")
xgb_music_feat_avg = joblib.load("xgb_avg_rating_music_features.pkl")
le_music_avg = joblib.load("xgb_avg_rating_music_label_encoder.pkl")

# Effect Sound
xgb_effect_num = joblib.load("xgb_num_downloads_effectsound_model.pkl")
xgb_effect_feat_num = joblib.load("xgb_num_downloads_effectsound_features.pkl")
xgb_effect_avg = joblib.load("xgb_avg_rating_effectsound_model.pkl")
xgb_effect_feat_avg = joblib.load("xgb_avg_rating_effectsound_features.pkl")
le_effect_avg = joblib.load("xgb_avg_rating_effectsound_label_encoder.pkl")

# ----------------------------
# 2️⃣ Fonctions utilitaires
# ----------------------------
def safe_float(v):
    try:
        return float(v)
    except:
        return 0.0

def predict_with_model(model, features, feat_list, le=None):
    # Préparer la ligne
    row = []
    for col in feat_list:
        val = features.get(col, 0)
        if val is None or isinstance(val, (list, dict)):
            val = 0
        row.append(safe_float(val))
    
    X = pd.DataFrame([row], columns=feat_list)
    
    # Transformer en DMatrix
    dmatrix = xgb.DMatrix(X.values, feature_names=feat_list)
    
    # Prédiction
    pred_int = int(model.get_booster().predict(dmatrix)[0])
    
    if le:
        return le.inverse_transform([pred_int])[0]
    return pred_int

# ----------------------------
# 2️⃣ Mapping Num_downloads
# ----------------------------
NUM_DOWNLOADS_MAP = {
    0: "Low",
    1: "Medium",
    2: "High"
}

# ----------------------------
# 3️⃣ Extraction + prédiction
# ----------------------------
def extract_and_predict(url):
    try:
        sound_id = int(url.rstrip("/").split("/")[-1])

        # Inclure duration explicitement
        all_features = list(set(
            xgb_music_feat_num + xgb_music_feat_avg + xgb_effect_feat_num + xgb_effect_feat_avg
        ))
        fields = "duration," + ",".join(all_features)

        results = client.search(
            query="",
            filter=f"id:{sound_id}",
            fields=fields
        )

        if len(results.results) == 0:
            return pd.DataFrame([{"Erreur": "Sound not found"}])

        sound = results.results[0]

        # ⚠️ Récupérer duration séparément
        duration = safe_float(sound.get("duration", 0))

        # ✅ Décider du type
        if 0.5 <= duration <= 3:
            # Effect Sound
            num = predict_with_model(xgb_effect_num, sound, xgb_effect_feat_num)
            avg = predict_with_model(xgb_effect_avg, sound, xgb_effect_feat_avg, le_effect_avg)
            return pd.DataFrame([{
                "Type": "Effect Sound",
                "Duration": duration,
                "Num_downloads": NUM_DOWNLOADS_MAP.get(num, str(num)),
                "Avg_rating": avg
            }])
        elif 10 <= duration <= 60:
            # Music
            num = predict_with_model(xgb_music_num, sound, xgb_music_feat_num)
            avg = predict_with_model(xgb_music_avg, sound, xgb_music_feat_avg, le_music_avg)
            return pd.DataFrame([{
                "Type": "Music",
                "Duration": duration,
                "Num_downloads": NUM_DOWNLOADS_MAP.get(num, str(num)),
                "Avg_rating": avg
            }])
        else:
            return pd.DataFrame([{
                "Erreur": "Durée non supportée pour prédiction",
                "Duration": duration
            }])

    except Exception as e:
        return pd.DataFrame([{"Erreur": str(e)}])

# ----------------------------
# 4️⃣ Interface Gradio
# ----------------------------
with gr.Blocks() as demo:
    gr.Markdown("## 🎧 FreeSound – Prédiction XGBoost (DMatrix)")
    url = gr.Textbox(label="URL FreeSound", placeholder="https://freesound.org/s/123456/")
    btn = gr.Button("Prédire")
    out = gr.Dataframe()
    btn.click(extract_and_predict, url, out)

demo.launch()