import discord

async def execute(bot, params, message):
    role_assignments = params.get('role_assignments', [])
    if not role_assignments:
        # Fallback for single assignment
        role_assignments = [params]
    assigned_count = 0
    total_members = 0
    for assignment in role_assignments:
        target_mention = assignment.get('target_user_mention')
        role_name = assignment.get('role_name')
        role = discord.utils.find(lambda r: r.name.casefold() == role_name.casefold(), message.guild.roles)
        if not role:
            await message.channel.send(f"Rôle '{role_name}' introuvable.")
            continue

        # Check for bulk assignment
        if target_mention.lower() in ['@everyone', 'everyone', 'all', 'tous']:
            total_members = 0
            assigned_count = 0
            await message.channel.send(f"Ajout du rôle '{role.name}' à tous les membres... (Cela peut prendre du temps)")
            for member in message.guild.members:
                if member.bot:
                    continue  # Skip bots
                try:
                    await member.add_roles(role, reason=f"Rôle ajouté par le Superviseur à tous les membres")
                    assigned_count += 1
                    total_members += 1
                    if assigned_count % 10 == 0:  # Progress update every 10 assigns
                        await message.channel.send(f"Progression: {assigned_count} sur {total_members} membres...")
                except discord.Forbidden:
                    await message.channel.send(f"Impossible d'ajouter le rôle à {member.mention} (permissions insuffisantes)")
                    continue
                except Exception as e:
                    await message.channel.send(f"Erreur lors de l'ajout à {member.mention}: {str(e)}")
                    continue
            await message.channel.send(f"Rôle '{role.name}' ajouté à {assigned_count} membres (bots exclus).")
            continue

        # Single user assignment
        if target_mention.startswith('<@') and target_mention.endswith('>'):
            user_id = int(target_mention[2:-1])
        elif target_mention.startswith('<@!') and target_mention.endswith('>'):
            user_id = int(target_mention[3:-1])
        else:
            try:
                user_id = int(target_mention)
            except ValueError:
                await message.channel.send(f"Mention ou ID invalide: {target_mention}")
                continue
        member = message.guild.get_member(user_id)
        if not member:
            await message.channel.send(f"Utilisateur {target_mention} introuvable.")
            continue
        try:
            await member.add_roles(role, reason=f"Rôle ajouté par le Superviseur")
            assigned_count += 1
        except discord.Forbidden:
            await message.channel.send(f"Je n'ai pas les permissions pour ajouter le rôle {role.name} à {member.mention}.")
    if assigned_count > 0 and not total_members:
        await message.channel.send(f"{assigned_count} rôle(s) ajouté(s).")