# controllers.py
import streamlit as st
import db

def label_widget(video, preselected=None):
    """Widget multiselect pour labels, avec création dynamique."""
    preselected = preselected or []
    key_multiselect = f"labels_{video.id}"
    key_input = f"new_label_{video.id}"

    labels = db.load_labels()

    if key_multiselect not in st.session_state:
        st.session_state[key_multiselect] = preselected

    current_selected = st.session_state[key_multiselect]

    # Si "Autre…" dans sélection, afficher input
    if "Autre…" in current_selected:
        new_label = st.text_input("Entrer un label personnalisé", value="", key=key_input)
        if new_label.strip():
            db.create_labels([new_label.strip()])
            labels = db.load_labels()
            current_selected = [l for l in current_selected if l != "Autre…"] + [new_label.strip()]
            st.session_state[key_multiselect] = current_selected

    selected = st.multiselect(
        "Labels",
        options=labels + ["Autre…"],
        default=st.session_state[key_multiselect],
        key=key_multiselect,
    )

    if st.button("💾 Sauvegarder labels", key=f"save_{video.id}"):
        video.save_labels(selected)
        st.success(f"{len(selected)} label(s) enregistré(s) pour {video.mp4_file_name}")

    return selected