from discord import Guild, Message, TextChannel
from discord.ext import commands

from storage import ConfigKey, Storage
import json

class BaseCog(commands.Cog):
	def __init__(self, bot):
		self.bot = bot

	@classmethod
	async def warn(cls, guild: Guild, message: str) -> Message:
		"""
		Sends a warning message to the configured warning channel for the
		given guild. If no warning channel is configured no action is taken.
		Returns the Message if successful or None if not.
		"""
		channel_id = Storage.get_config_value(guild, ConfigKey.WARNING_CHANNEL_ID)
		if channel_id is None:
			cls.guild_trace(guild, 'No warning channel set! No warning issued.')
			return None
		channel: TextChannel = guild.get_channel(channel_id)
		if channel is None:
			cls.guild_trace(guild, 'Configured warning channel does not exist!')
			return None
		mention: str = Storage.get_config_value(guild, ConfigKey.WARNING_MENTION)
		text: str = message
		if mention is not None:
			text = f'{mention} {text}'
		msg: Message = await channel.send(text)
		return msg

	@classmethod
	async def update_warn(cls, warn_message: Message, new_text: str) -> None:
		"""
		Updates the text of a previously posted `warn`. Includes configured
		mentions if necessary.
		"""
		text: str = new_text
		mention: str = Storage.get_config_value(
			warn_message.guild,
			ConfigKey.WARNING_MENTION)
		if mention is not None:
			text = f'{mention} {text}'
		await warn_message.edit(content=text)

	@classmethod
	def guild_trace(cls, guild: Guild, message: str) -> None:
		print(f'[guild {guild.id}|{guild.name}] {message}')