import discord
from .config import config

async def execute(bot, params, message):
    channel_name = params.get('channel_name')
    if not channel_name:
        await message.channel.send("Veuillez spécifier un nom de salon.")
        return
    guild = message.guild
    channel = discord.utils.find(lambda c: c.name.casefold() == channel_name.casefold(), guild.channels)
    if not channel:
        await message.channel.send(f"Salon '{channel_name}' introuvable.")
        return
    config.set_welcome_channel(guild.id, channel.id)
    await message.channel.send(f"Salon de bienvenue défini sur {channel.mention}.")