"""Channel manager for coordinating chat channels."""

import asyncio
from typing import Any

from loguru import logger

from debot.bus import MessageBus
from debot.channels.base import BaseChannel
from debot.config.schema import Config


class ChannelManager:
    """
    Manages chat channels and coordinates message routing.

    Responsibilities:
    - Initialize enabled channels (Telegram, WhatsApp, etc.)
    - Start/stop channels
    - Route outbound messages
    """

    def __init__(self, config: Config, bus: MessageBus):
        self.config = config
        self.bus = bus
        self.channels: dict[str, BaseChannel] = {}
        self._dispatch_task: asyncio.Task | None = None

        self._init_channels()

    def _init_channels(self) -> None:
        """Initialize channels based on config."""

        # Telegram channel
        if self.config.channels.telegram.enabled:
            try:
                from debot.channels.telegram import TelegramChannel

                self.channels["telegram"] = TelegramChannel(
                    self.config.channels.telegram,
                    self.bus,
                    groq_api_key=self.config.providers.groq.api_key,
                )
                logger.info("Telegram channel enabled")
            except ImportError as e:
                logger.warning(f"Telegram channel not available: {e}")

        # WhatsApp channel
        if self.config.channels.whatsapp.enabled:
            try:
                from debot.channels.whatsapp import WhatsAppChannel

                self.channels["whatsapp"] = WhatsAppChannel(self.config.channels.whatsapp, self.bus)
                logger.info("WhatsApp channel enabled")
            except ImportError as e:
                logger.warning(f"WhatsApp channel not available: {e}")

    async def start_all(self) -> None:
        """Start WhatsApp channel and the outbound dispatcher."""
        if not self.channels:
            logger.warning("No channels enabled")
            return

        # Start outbound dispatcher
        self._dispatch_task = asyncio.create_task(self._dispatch_outbound())

        # Start WhatsApp channel
        tasks = []
        for name, channel in self.channels.items():
            logger.info(f"Starting {name} channel...")
            tasks.append(asyncio.create_task(channel.start()))

        # Wait for all to complete (they should run forever)
        await asyncio.gather(*tasks, return_exceptions=True)

    async def stop_all(self) -> None:
        """Stop all channels and the dispatcher."""
        logger.info("Stopping all channels...")

        # Stop dispatcher
        if self._dispatch_task:
            self._dispatch_task.cancel()
            try:
                await self._dispatch_task
            except asyncio.CancelledError:
                pass

        # Stop all channels
        for name, channel in self.channels.items():
            try:
                await channel.stop()
                logger.info(f"Stopped {name} channel")
            except Exception as e:
                logger.error(f"Error stopping {name}: {e}")

    async def _dispatch_outbound(self) -> None:
        """Dispatch outbound messages to the appropriate channel."""
        logger.info("Outbound dispatcher started")

        while True:
            try:
                msg = await asyncio.wait_for(self.bus.consume_outbound(), timeout=1.0)

                channel = self.channels.get(msg.channel)
                if channel:
                    try:
                        await channel.send(msg)
                    except Exception as e:
                        logger.error(f"Error sending to {msg.channel}: {e}")
                else:
                    logger.warning(f"Unknown channel: {msg.channel}")

            except asyncio.TimeoutError:
                continue
            except asyncio.CancelledError:
                break

    def get_channel(self, name: str) -> BaseChannel | None:
        """Get a channel by name."""
        return self.channels.get(name)

    def get_status(self) -> dict[str, Any]:
        """Get status of all channels."""
        return {name: {"enabled": True, "running": channel.is_running} for name, channel in self.channels.items()}

    @property
    def enabled_channels(self) -> list[str]:
        """Get list of enabled channel names."""
        return list(self.channels.keys())
