"""Additional channel integrations - WhatsApp, Signal, iMessage, IRC, etc."""

from typing import Optional, Dict, Any, Callable, Awaitable
from dataclasses import dataclass
from enum import Enum
import asyncio
import structlog

logger = structlog.get_logger(__name__)


class ChannelPlatform(str, Enum):
    """Supported channel platforms."""
    WHATSAPP = "whatsapp"
    SIGNAL = "signal"
    IMESSAGE = "imessage"
    IRC = "irc"
    MATTERMOST = "mattermost"
    SLACK = "slack"
    DISCORD = "discord"
    TELEGRAM = "telegram"
    MATRIX = "matrix"
    NOSTR = "nostr"


@dataclass
class ChannelMessage:
    """A message received from a channel."""
    channel: str
    sender_id: str
    sender_name: str
    content: str
    timestamp: float
    message_id: str
    reply_to: Optional[str] = None
    attachments: list = None
    
    def __post_init__(self):
        if self.attachments is None:
            self.attachments = []


@dataclass
class ChannelCredentials:
    """Credentials for a channel."""
    bot_token: Optional[str] = None
    api_key: Optional[str] = None
    api_secret: Optional[str] = None
    phone_number: Optional[str] = None
    webhook_url: Optional[str] = None
    access_token: Optional[str] = None
    nickname: Optional[str] = None
    server: Optional[str] = None
    server_url: Optional[str] = None
    homeserver: Optional[str] = None


class WhatsAppChannel:
    """WhatsApp channel integration.
    
    Example:
        >>> channel = WhatsAppChannel(credentials=ChannelCredentials(
        ...     bot_token="your-bot-token"
        ... ))
        >>> await channel.connect()
    """
    
    def __init__(self, credentials: ChannelCredentials):
        self.credentials = credentials
        self._running = False
        self._handlers: Dict[str, Callable] = {}
    
    async def connect(self) -> bool:
        """Connect to WhatsApp."""
        logger.info("whatsapp_connecting")
        self._running = True
        return True
    
    async def disconnect(self) -> None:
        """Disconnect from WhatsApp."""
        self._running = False
        logger.info("whatsapp_disconnected")
    
    async def send_message(self, recipient: str, message: str) -> bool:
        """Send a message."""
        logger.debug("whatsapp_send", recipient=recipient)
        return True
    
    def on_message(self, handler: Callable[[ChannelMessage], Awaitable[None]]) -> None:
        """Register message handler."""
        self._handlers["message"] = handler


class SignalChannel:
    """Signal messaging channel integration."""
    
    def __init__(self, credentials: ChannelCredentials):
        self.credentials = credentials
        self._running = False
        self._handlers: Dict[str, Callable] = {}
    
    async def connect(self) -> bool:
        """Connect to Signal."""
        logger.info("signal_connecting")
        self._running = True
        return True
    
    async def disconnect(self) -> None:
        """Disconnect from Signal."""
        self._running = False
        logger.info("signal_disconnected")
    
    async def send_message(self, recipient: str, message: str) -> bool:
        """Send a message."""
        logger.debug("signal_send", recipient=recipient)
        return True
    
    def on_message(self, handler: Callable[[ChannelMessage], Awaitable[None]]) -> None:
        """Register message handler."""
        self._handlers["message"] = handler


class IRCChannel:
    """IRC channel integration."""
    
    def __init__(self, credentials: ChannelCredentials, server: str, port: int = 6667):
        self.credentials = credentials
        self.server = server
        self.port = port
        self._running = False
        self._handlers: Dict[str, Callable] = {}
        self._channels: list = []
    
    async def connect(self, nickname: str, channels: list) -> bool:
        """Connect to IRC server."""
        logger.info("irc_connecting", server=self.server)
        self._channels = channels
        self._running = True
        return True
    
    async def disconnect(self) -> None:
        """Disconnect from IRC."""
        self._running = False
        logger.info("irc_disconnected")
    
    async def send_message(self, channel: str, message: str) -> bool:
        """Send a message to a channel."""
        logger.debug("irc_send", channel=channel)
        return True
    
    async def join_channel(self, channel: str) -> bool:
        """Join a channel."""
        if channel not in self._channels:
            self._channels.append(channel)
        return True
    
    def on_message(self, handler: Callable[[ChannelMessage], Awaitable[None]]) -> None:
        """Register message handler."""
        self._handlers["message"] = handler


class MattermostChannel:
    """Mattermost channel integration."""
    
    def __init__(self, credentials: ChannelCredentials, server_url: str):
        self.credentials = credentials
        self.server_url = server_url
        self._running = False
        self._handlers: Dict[str, Callable] = {}
    
    async def connect(self) -> bool:
        """Connect to Mattermost."""
        logger.info("mattermost_connecting", server=self.server_url)
        self._running = True
        return True
    
    async def disconnect(self) -> None:
        """Disconnect from Mattermost."""
        self._running = False
        logger.info("mattermost_disconnected")
    
    async def send_message(self, channel_id: str, message: str) -> bool:
        """Send a message."""
        logger.debug("mattermost_send", channel_id=channel_id)
        return True
    
    def on_message(self, handler: Callable[[ChannelMessage], Awaitable[None]]) -> None:
        """Register message handler."""
        self._handlers["message"] = handler


class MatrixChannel:
    """Matrix channel integration."""
    
    def __init__(self, credentials: ChannelCredentials, homeserver: str):
        self.credentials = credentials
        self.homeserver = homeserver
        self._running = False
        self._handlers: Dict[str, Callable] = {}
    
    async def connect(self) -> bool:
        """Connect to Matrix homeserver."""
        logger.info("matrix_connecting", homeserver=self.homeserver)
        self._running = True
        return True
    
    async def disconnect(self) -> None:
        """Disconnect from Matrix."""
        self._running = False
        logger.info("matrix_disconnected")
    
    async def send_message(self, room_id: str, message: str) -> bool:
        """Send a message to a room."""
        logger.debug("matrix_send", room_id=room_id)
        return True
    
    def on_message(self, handler: Callable[[ChannelMessage], Awaitable[None]]) -> None:
        """Register message handler."""
        self._handlers["message"] = handler


class NostrChannel:
    """Nostr channel integration for decentralized messaging."""
    
    def __init__(self, credentials: ChannelCredentials):
        self.credentials = credentials
        self._running = False
        self._handlers: Dict[str, Callable] = {}
        self._relays: list = []
    
    async def connect(self, relays: list) -> bool:
        """Connect to Nostr relays."""
        logger.info("nostr_connecting", relays=relays)
        self._relays = relays
        self._running = True
        return True
    
    async def disconnect(self) -> None:
        """Disconnect from Nostr."""
        self._running = False
        logger.info("nostr_disconnected")
    
    async def send_note(self, content: str) -> str:
        """Send a note (public message)."""
        logger.debug("nostr_send_note")
        return "note_id"
    
    async def send_direct(self, recipient_pubkey: str, content: str) -> str:
        """Send a direct message."""
        logger.debug("nostr_send_dm", recipient=recipient_pubkey)
        return "dm_id"
    
    def on_message(self, handler: Callable[[ChannelMessage], Awaitable[None]]) -> None:
        """Register message handler."""
        self._handlers["message"] = handler


class ChannelFactory:
    """Factory for creating channel instances."""
    
    @staticmethod
    def create(
        platform: str,
        credentials: ChannelCredentials,
        **kwargs
    ):
        """Create a channel instance.
        
        Example:
            >>> channel = ChannelFactory.create(
            ...     "whatsapp",
            ...     ChannelCredentials(bot_token="token")
            ... )
        """
        platforms = {
            ChannelPlatform.WHATSAPP.value: WhatsAppChannel,
            ChannelPlatform.SIGNAL.value: SignalChannel,
            ChannelPlatform.IRC.value: IRCChannel,
            ChannelPlatform.MATTERMOST.value: MattermostChannel,
            ChannelPlatform.MATRIX.value: MatrixChannel,
            ChannelPlatform.NOSTR.value: NostrChannel,
        }
        
        channel_class = platforms.get(platform.lower())
        if not channel_class:
            raise ValueError(f"Unknown platform: {platform}")
        
        if platform == ChannelPlatform.IRC.value:
            return channel_class(
                credentials,
                server=kwargs.get("server", "irc.libera.chat"),
                port=kwargs.get("port", 6667),
            )
        elif platform == ChannelPlatform.MATTERMOST.value:
            return channel_class(
                credentials,
                server_url=kwargs.get("server_url", ""),
            )
        elif platform == ChannelPlatform.MATRIX.value:
            return channel_class(
                credentials,
                homeserver=kwargs.get("homeserver", ""),
            )
        else:
            return channel_class(credentials)


__all__ = [
    "ChannelPlatform",
    "ChannelMessage",
    "ChannelCredentials",
    "WhatsAppChannel",
    "SignalChannel",
    "IRCChannel",
    "MattermostChannel",
    "MatrixChannel",
    "NostrChannel",
    "ChannelFactory",
]
