import gradio as gr
import pandas as pd
from backend.providers.sources import SOURCE_GROUPS

def load_sources():
    rows = []
    for group_name, sources in SOURCE_GROUPS.items():
        for src in sources:
            rows.append({"Grupo": group_name, "Fuente": src})
    df = pd.DataFrame(rows)
    stats = f"**{len(SOURCE_GROUPS)} grupos** con **{len(set(r['Fuente'] for r in rows))} fuentes únicas**"
    return df, stats

def create_sources_tab():
    with gr.Tab("📡 Fuentes", id="sources"):
        gr.Markdown("## Catálogo de Fuentes Académicas")
        sources_df = gr.Dataframe(headers=["Grupo", "Fuente"], label="Fuentes por Grupo", wrap=True)
        sources_md = gr.Markdown("")
        load_btn = gr.Button("🔄 Cargar Fuentes", variant="primary", size="lg")
        load_btn.click(fn=load_sources, outputs=[sources_df, sources_md])