app.py

import gradio as gr
import pandas as pd
from arena import Arena
import plotly.graph_objs as go
import numpy as np

LABEL_A = "Proposition A"
LABEL_B = "Proposition B"

ARENA = Arena()
ARENA.init_estimates()


def select_and_display_match():
    try:
        prompt_a, prompt_b = ARENA.select_match()
        state = {"prompt_a_id": prompt_a["id"], "prompt_b_id": prompt_b["id"]}
        vote_a_btn_update = gr.update(interactive=True)
        vote_b_btn_update = gr.update(interactive=True)
        new_match_btn_update = gr.update(interactive=False)
        return (
            prompt_a["text"],
            prompt_b["text"],
            state,
            vote_a_btn_update,
            vote_b_btn_update,
            new_match_btn_update,
        )
    except Exception as e:
        return f"Erreur lors de la sélection d'un match: {str(e)}", "", "", {}


def record_winner_a(state):
    try:
        prompt_a_id = state["prompt_a_id"]
        prompt_b_id = state["prompt_b_id"]
        ARENA.record_result(prompt_a_id, prompt_b_id)
        progress_info = ARENA.get_progress()
        rankings_table = ARENA.get_rankings()
        vote_a_btn_update = gr.update(interactive=False)
        vote_b_btn_update = gr.update(interactive=False)
        new_match_btn_update = gr.update(interactive=True)
        return (
            f"Vous avez choisi : {LABEL_A}",
            progress_info,
            rankings_table,
            vote_a_btn_update,
            vote_b_btn_update,
            new_match_btn_update,
        )
    except Exception as e:
        return (
            f"Erreur lors de l'enregistrement du résultat: {str(e)}",
            "",
            pd.DataFrame(),
        )


def record_winner_b(state):
    try:
        prompt_a_id = state["prompt_a_id"]
        prompt_b_id = state["prompt_b_id"]
        ARENA.record_result(prompt_b_id, prompt_a_id)
        progress_info = ARENA.get_progress()
        rankings_table = ARENA.get_rankings()
        vote_a_btn_update = gr.update(interactive=False)
        vote_b_btn_update = gr.update(interactive=False)
        new_match_btn_update = gr.update(interactive=True)
        return (
            f"Vous avez choisi : {LABEL_B}",
            progress_info,
            rankings_table,
            vote_a_btn_update,
            vote_b_btn_update,
            new_match_btn_update,
        )
    except Exception as e:
        return (
            f"Erreur lors de l'enregistrement du résultat: {str(e)}",
            "",
            pd.DataFrame(),
        )


def update_table(table_name, df):
    """Met à jour le fichier CSV de la table spécifiée à partir du DataFrame édité."""
    ARENA.replace(table_name, df)
    return None


def admin_visible(request: gr.Request):
    is_admin = request.username == "admin"
    return gr.update(visible=is_admin)


def welcome_user(request: gr.Request):
    return request.username


def plot_estimates_distribution():
    """Affiche une gaussienne par prompt (Plotly) + lignes verticales pointillées sur les moyennes."""
    estimates = ARENA.load("estimates")
    prompts = ARENA.load("prompts")
    if estimates.empty or prompts.empty:
        fig = go.Figure()
        fig.add_annotation(
            text="Aucune estimation disponible", x=0.5, y=0.5, showarrow=False
        )
        return fig
    x = np.linspace(
        estimates["mu"].min() - 3 * estimates["sigma"].max(),
        estimates["mu"].max() + 3 * estimates["sigma"].max(),
        500,
    )
    fig = go.Figure()
    shapes = []
    # Une gaussienne par prompt
    for _, row in estimates.iterrows():
        mu = row["mu"]
        sigma = row["sigma"]
        prompt_id = row["prompt_id"] if "prompt_id" in row else row["id"]
        # Chercher le nom du prompt
        name = str(prompt_id)
        if "name" in prompts.columns:
            match = prompts[prompts["id"] == prompt_id]
            if not match.empty:
                name = match.iloc[0]["name"]
        y = 1 / (sigma * np.sqrt(2 * np.pi)) * np.exp(-0.5 * ((x - mu) / sigma) ** 2)
        fig.add_trace(
            go.Scatter(
                x=x,
                y=y,
                mode="lines",
                name=f"{name}",
                hovertemplate=f"<b>{name}</b><br>Score (mu): {mu:.2f}<br>Sigma: {sigma:.2f}<extra></extra>",
            )
        )
        # Ajout de la ligne verticale pointillée à mu (en gris)
        shapes.append(
            dict(
                type="line",
                x0=mu,
                x1=mu,
                y0=0,
                y1=max(y),
                line=dict(
                    color="gray",
                    width=2,
                    dash="dot",
                ),
                xref="x",
                yref="y",
            )
        )
    fig.update_layout(
        title="Distribution gaussienne de chaque prompt",
        xaxis_title="Score (mu)",
        yaxis_title="Densité",
        template="plotly_white",
        shapes=shapes,
    )
    return fig


with gr.Blocks(
    title="Prompt Arena",
    #    theme=gr.themes.Default.load("theme_schema_miku.json"),
) as demo:
    state = gr.State()

    with gr.Row():
        username = gr.Markdown("")
        gr.Button("Logout", link="/logout", scale=0, min_width=50)

    gr.Markdown(
        '<h1 style="text-align:center;"> Concours du meilleur Prompt Engineer  </h1>'
    )

    progress_info = gr.Textbox(
        label="Progression du concours",
        value=ARENA.get_progress(),
        interactive=False,
        lines=2,
    )

    with gr.Tabs() as tabs:
        # Onglet des Combats
        with gr.TabItem("Combats"):
            with gr.Row():
                new_match_btn = gr.Button("Lancer un nouveau match", variant="primary")

            with gr.Row():
                with gr.Column():
                    proposition_a = gr.Textbox(label=LABEL_A, interactive=False)
                    vote_a_btn = gr.Button("Choisir " + LABEL_A, interactive=False)
                with gr.Column():
                    proposition_b = gr.Textbox(label=LABEL_B, interactive=False)
                    vote_b_btn = gr.Button("Choisir " + LABEL_B, interactive=False)
            result = gr.Textbox("Résultat", interactive=False)

            #        with gr.TabItem("Classement"):
            rankings_table = gr.DataFrame(
                label="Classement des prompts",
                value=ARENA.get_rankings(),
                interactive=True,
            )

        # Onglet des Résultats
        with gr.TabItem("Admin") as admin_tab:
            with gr.Accordion("Prompts", open=False):
                prompts_table = gr.DataFrame(
                    value=ARENA.load("prompts"),
                    interactive=True,
                )
            with gr.Accordion("Estimates", open=False):
                estimates_table = gr.DataFrame(
                    label="Estimations",
                    value=ARENA.load("estimates"),
                    interactive=True,
                )
            with gr.Accordion("Votes", open=False):
                votes_table = gr.DataFrame(
                    label="Votes",
                    value=ARENA.load("votes"),
                    interactive=True,
                )
            gr.Plot(plot_estimates_distribution, label="Distribution des estimations")
            prompts_table.change(
                update_table,
                inputs=[gr.Markdown("prompts", visible=False), prompts_table],
                outputs=None,
            )
            estimates_table.change(
                update_table,
                inputs=[gr.Markdown("estimates", visible=False), estimates_table],
                outputs=None,
            )
            votes_table.change(
                update_table,
                inputs=[gr.Markdown("votes", visible=False), votes_table],
                outputs=None,
            )

    new_match_btn.click(
        select_and_display_match,
        inputs=[],
        outputs=[
            proposition_a,
            proposition_b,
            state,
            vote_a_btn,
            vote_b_btn,
            new_match_btn,
        ],
    )

    # Callbacks pour les deux onglets
    vote_a_btn.click(
        record_winner_a,
        inputs=[state],
        outputs=[
            result,
            progress_info,
            rankings_table,
            vote_a_btn,
            vote_b_btn,
            new_match_btn,
        ],
    )
    vote_b_btn.click(
        record_winner_b,
        inputs=[state],
        outputs=[
            result,
            progress_info,
            rankings_table,
            vote_a_btn,
            vote_b_btn,
            new_match_btn,
        ],
    )

    demo.load(admin_visible, None, admin_tab)
    demo.load(welcome_user, None, username)


def arena_auth(username, password):
    if username == "admin":
        return (
            password == "fred"
        )  # todo : mettre le mot de passe en variable d'environnement
    else:
        return username == password


# Exemple d'utilisation
if __name__ == "__main__":
    demo.launch(
        auth_message="Connexion à l'arène des prompts", auth=arena_auth
    )  # ajouter share=True pour partager l'interface