import discord

async def _find_role(guild, role_params):
    """Find a role by ID first, then by name (case-insensitive)."""
    role_id = role_params.get('role_id')
    if role_id:
        try:
            r = guild.get_role(int(role_id))
            if r:
                return r
        except (ValueError, TypeError):
            pass
    
    role_name = role_params.get('role_name')
    if not role_name:
        return None
    
    return discord.utils.find(lambda r: r.name.casefold() == role_name.casefold(), guild.roles)

async def execute(bot, params, message):
    roles = params.get('roles', [])
    if not roles:
        # Fallback for single role
        roles = [params]
    guild = message.guild
    renamed_count = 0
    for role_params in roles:
        role_name = role_params.get('role_name')
        new_name = role_params.get('new_name')
        
        role = await _find_role(guild, role_params)
        if not role:
            label = role_name or role_params.get('role_id', 'inconnu')
            await message.channel.send(f"Rôle '{label}' introuvable.")
            continue
        try:
            await role.edit(name=new_name)
            renamed_count += 1
        except discord.Forbidden:
            label = role_name or role_params.get('role_id', 'inconnu')
            await message.channel.send(f"Je n'ai pas les permissions pour renommer le rôle '{label}'.")
    if renamed_count > 0:
        await message.channel.send(f"{renamed_count} rôle(s) renommé(s).")