import logging
from functools import wraps

from nio import AsyncClient, RoomMessageText

from config import BOT_PREFIX, MATRIX_USER_ID
from commands import COMMANDS, metrics

logger = logging.getLogger("matrixbot")


def handle_command_errors(func):
    @wraps(func)
    async def wrapper(client, room_id, sender, args):
        try:
            return await func(client, room_id, sender, args)
        except Exception as e:
            logger.error(f"Error in command {func.__name__}: {e}", exc_info=True)
            metrics.record_error(func.__name__)
            try:
                from utils import send_text
                await send_text(client, room_id, "An unexpected error occurred. Please try again later.")
            except Exception as e2:
                logger.error(f"Failed to send error message: {e2}", exc_info=True)
    return wrapper


class Callbacks:
    def __init__(self, client: AsyncClient):
        self.client = client
        # Track the sync token so we ignore old messages on startup
        self.startup_sync_token = None

    async def message(self, room, event):
        # Ignore messages from before the bot started
        if self.startup_sync_token is None:
            return

        # Ignore our own messages
        if event.sender == MATRIX_USER_ID:
            return

        body = event.body.strip() if event.body else ""
        if not body.startswith(BOT_PREFIX):
            return

        # Parse command and args
        without_prefix = body[len(BOT_PREFIX):]
        parts = without_prefix.split(None, 1)
        cmd_name = parts[0].lower() if parts else ""
        args = parts[1] if len(parts) > 1 else ""

        logger.info(f"Command '{cmd_name}' from {event.sender} in {room.room_id}")

        handler_entry = COMMANDS.get(cmd_name)
        if handler_entry is None:
            return

        handler, _ = handler_entry
        metrics.record_command(cmd_name)
        wrapped = handle_command_errors(handler)
        await wrapped(self.client, room.room_id, event.sender, args)