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 _find_category(guild, category_params):
    """Find a category by ID first, then by name (case-insensitive)."""
    # Support both 'category_id' and 'new_category_id'
    category_id = category_params.get('new_category_id') or category_params.get('category_id')
    if category_id:
        try:
            cat = guild.get_channel(int(category_id))
            if cat and isinstance(cat, discord.CategoryChannel):
                return cat
        except (ValueError, TypeError):
            pass
    
    category_name = category_params.get('new_category_name') or category_params.get('category_name')
    if not category_name:
        return None
    
    return discord.utils.find(lambda cat: cat.name.casefold() == category_name.casefold(), guild.categories)

async def execute(bot, params, message):
    channels = params.get('channels', [])
    if not channels:
        # Fallback for single channel
        channels = [params]
    guild = message.guild
    moved_count = 0
    for channel_params in channels:
        channel_name = channel_params.get('channel_name')
        new_category_name = channel_params.get('new_category_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
        
        category = await _find_category(guild, channel_params)
        if not category:
            has_category_param = any(k in channel_params for k in ['new_category_id', 'new_category_name', 'category_id', 'category_name'])
            if has_category_param:
                label = new_category_name or channel_params.get('new_category_id') or channel_params.get('category_id', 'inconnue')
                await message.channel.send(f"Catégorie '{label}' introuvable.")
                continue
        
        try:
            await channel.edit(category=category)
            moved_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 déplacer le salon '{label}'.")
    if moved_count > 0:
        await message.channel.send(f"{moved_count} salon(s) déplacé(s).")