"""Twitch chat client for sending and receiving messages."""

import logging
from typing import Optional

logger = logging.getLogger(__name__)


async def send_chat_message(
    channel_name: str,
    message: str,
    access_token: Optional[str] = None,
) -> bool:
    """
    Send a message to Twitch chat.
    
    Args:
        channel_name: Twitch channel to send message to
        message: Message content
        access_token: OAuth token with chat:edit scope
        
    Returns:
        True if message sent successfully
        
    TODO: Implement Twitch Send Chat Message API
    Reference: https://dev.twitch.tv/docs/api/reference#send-chat-message
    
    TODO: Handle rate limiting (20 messages per 30 seconds for verified bots)
    TODO: Implement message queue for reliable delivery
    TODO: Add retry logic with exponential backoff
    """
    logger.info(f"Sending message to {channel_name}: {message[:50]}...")
    # Stub implementation
    return True


class ChatMessageBuffer:
    """
    Buffer for outgoing chat messages with rate limiting.
    
    Implements Twitch's chat rate limits:
    - Regular users: 20 messages per 30 seconds
    - Verified bots: 50 messages per 30 seconds
    - Moderators: 100 messages per 30 seconds
    
    TODO: Implement queue with configurable rate limits
    TODO: Add priority levels for urgent messages
    TODO: Implement metrics tracking
    """

    def __init__(self, channel_name: str, max_messages_per_interval: int = 20):
        """Initialize message buffer."""
        self.channel_name = channel_name
        self.max_messages_per_interval = max_messages_per_interval
        self.message_queue: list[str] = []

    async def add_message(self, message: str) -> None:
        """Add a message to the buffer."""
        self.message_queue.append(message)
        logger.debug(f"Message queued for {self.channel_name}")

    async def flush(self) -> None:
        """Send all buffered messages."""
        for message in self.message_queue:
            await send_chat_message(self.channel_name, message)
        self.message_queue.clear()