import discord

async def _find_channel(guild, channel_params):
    """Find a channel by ID first, then by name (case-insensitive)."""
    channel_id = channel_params.get('channel_id')
    if channel_id:
        try:
            ch = guild.get_channel(int(channel_id))
            if ch:
                return ch
        except (ValueError, TypeError):
            pass
    
    channel_name = channel_params.get('channel_name')
    if not channel_name:
        return None
    
    return discord.utils.find(lambda c: c.name.casefold() == channel_name.casefold(), guild.channels)

async def execute(bot, params, message):
    channels = params.get('channels', [])
    if not channels:
        # Fallback for single channel
        channels = [params]
    guild = message.guild
    renamed_count = 0
    for channel_params in channels:
        channel_name = channel_params.get('channel_name')
        # Support both 'new_name' and 'new_channel_name' variants
        new_name = channel_params.get('new_name') or channel_params.get('new_channel_name')
        
        channel = await _find_channel(guild, channel_params)
        if not channel:
            label = channel_name or channel_params.get('channel_id', 'inconnu')
            await message.channel.send(f"Salon '{label}' introuvable.")
            continue
        
        if not new_name:
            await message.channel.send("Aucun nouveau nom spécifié pour le renommage.")
            continue
        
        try:
            await channel.edit(name=new_name)
            renamed_count += 1
        except discord.Forbidden:
            label = channel_name or channel_params.get('channel_id', 'inconnu')
            await message.channel.send(f"Je n'ai pas les permissions pour renommer le salon '{label}'.")
        except Exception as e:
            label = channel_name or channel_params.get('channel_id', 'inconnu')
            await message.channel.send(f"Erreur lors du renommage du salon '{label}': {e}")
    if renamed_count > 0:
        await message.channel.send(f"{renamed_count} salon(s) renommé(s).")