"""
Cog handling general configuration for a guild.
"""
from typing import Optional, Union

from discord import Guild, Interaction, Role, TextChannel, User
from discord.app_commands import Group
from discord.ext.commands import Bot

from config import CONFIG
from rocketbot.cogs.basecog import BaseCog
from rocketbot.storage import ConfigKey, Storage
from rocketbot.utils import MOD_PERMISSIONS


class ConfigCog(BaseCog, name='Configuration'):
	"""
	Cog for handling general bot configuration.
	"""

	def __init__(self, bot: Bot) -> None:
		super().__init__(
			bot,
			config_prefix='config',
			short_description='Manages general bot configuration.',
		)

	config = Group(
		name='config',
		description='Manages general bot configuration.',
		guild_only=True,
		default_permissions=MOD_PERMISSIONS,
	)

	@config.command(
		description='Sets mod warnings to post in the current channel.',
		extras={
			'long_description': 'Run this command in the channel where bot messages intended '
								'for server moderators should be sent. Other bot messages may '
								'still be posted in the channel a command was invoked in. **If '
								'no output channel is set, mod-related messages will not be posted!**',
		},
	)
	async def set_warning_channel(self, interaction: Interaction) -> None:
		"""
		Sets mod warnings to post in the current channel.

		Run this command in the channel where bot messages intended for server
		moderators should be sent. Other bot messages may still be posted in
		the channel a command was invoked in. If no output channel is set,
		mod-related messages will not be posted!
		"""
		guild: Guild = interaction.guild
		channel: TextChannel = interaction.channel
		Storage.set_config_value(guild, ConfigKey.WARNING_CHANNEL_ID,
			interaction.channel.id)
		await interaction.response.send_message(
			f'{CONFIG["success_emoji"]} Warning channel updated to {channel.mention}.',
			ephemeral=True,
		)

	@config.command(
		description='Shows the configured mod warning channel, if any.'
	)
	async def get_warning_channel(self, interaction: Interaction) -> None:
		guild: Guild = interaction.guild
		channel_id = Storage.get_config_value(guild, ConfigKey.WARNING_CHANNEL_ID)
		if channel_id is None:
			await interaction.response.send_message(
				f'{CONFIG["info_emoji"]} No warning channel is configured.',
				ephemeral=True,
			)
		else:
			channel = guild.get_channel(channel_id)
			await interaction.response.send_message(
				f'{CONFIG["info_emoji"]} Warning channel is configured as {channel.mention}.',
				ephemeral=True,
			)

	@config.command(
		description='Sets the user or role to tag in warning messages.',
		extras={
			'long_description': 'Calling this without a value disables tagging in warnings.',
		}
	)
	async def set_warning_mention(self,
			interaction: Interaction,
			mention: Optional[Union[User, Role]] = None) -> None:
		"""
		Sets a user/role to mention in warning messages.

		Parameters
		----------
		interaction: Interaction
		mention: User or Role
			the user or role to mention in warning messages
		"""
		guild: Guild = interaction.guild
		Storage.set_config_value(guild, ConfigKey.WARNING_MENTION, mention.mention if mention else None)
		if mention is None:
			await interaction.response.send_message(
				f'{CONFIG["success_emoji"]} Warning messages will not tag anyone.',
				ephemeral=True,
			)
		else:
			await interaction.response.send_message(
				f'{CONFIG["success_emoji"]} Warning messages will now tag {mention.mention}.',
				ephemeral=True,
			)

	@config.command(
		description='Shows the configured user or role tagged in warning messages.',
	)
	async def get_warning_mention(self, interaction: Interaction) -> None:
		guild: Guild = interaction.guild
		mention: str = Storage.get_config_value(guild, ConfigKey.WARNING_MENTION)
		if mention is None:
			await interaction.response.send_message(
				f'{CONFIG["info_emoji"]} No warning mention configured.',
				ephemeral=True,
			)
		else:
			await interaction.response.send_message(
				f'{CONFIG["info_emoji"]} Warning messages will tag {mention}',
				ephemeral=True,
			)