#!/usr/bin/env python3.12
import re
import discord
from typing import Optional, Any

"""
Discord Helper Methods
"""

async def get_channel_by_name(bot: discord.Bot, channel: str,
                              guild: int | None = None) -> Optional[Any]: # Optional[Any] used as pycord channel types can be ambigious
    """
    Get Channel by Name
    
    Args:
        bot (discord.Bot)
        channel (str)
        guild (int|None)
    Returns:
        Optional[Any]
    """
    channel = re.sub(r'^#', '', channel.strip())
    if not guild:
        return discord.utils.get(bot.get_all_channels(),
                             name=channel)
    else:
        _guild: Optional[discord.Guild] = bot.get_guild(guild)
        if not _guild:
            return None
        channels: list = _guild.channels
        for _channel in channels:
            if _channel.name.lower() == channel.lower().strip():
                return _channel
        return None

async def send_message(bot: discord.Bot, channel: str,
                       message: str, guild: int | None = None) -> None:
    """
    Send Message to the provided channel.  If guild is provided, will limit to channels within that guild to ensure the correct
    channel is selected.  Useful in the event a channel exists in more than one guild that the bot resides in.
    
    Args:
        bot (discord.Bot)
        channel (str)
        message (str)
        guild (int|None)
    Returns:
        None
    """
    if channel.isnumeric():
        channel_int: int = int(channel)
        _channel = bot.get_channel(channel_int)
    else:
        channel = re.sub(r'^#', '', channel.strip()) 
        _channel = await get_channel_by_name(bot=bot,
                                        channel=channel, guild=guild)
    if not isinstance(_channel, discord.TextChannel):
        return None
    await _channel.send(message)