from bson.errors import InvalidId
from discord import ApplicationContext, Cog, option, slash_command
from discord.utils import basic_autocomplete

from classes import PycordEvent, PycordGuild, PycordUser
from classes.pycord_bot import PycordBot
from modules.utils import autocomplete_user_registered_events, is_operation_confirmed


class CogUnregister(Cog):
    """Cog with the event unregistration command."""

    def __init__(self, bot: PycordBot):
        self.bot: PycordBot = bot

    # TODO Introduce i18n
    @slash_command(
        name="unregister",
        description="Leave the selected event",
    )
    @option(
        "event",
        description="Name of the event",
        autocomplete=basic_autocomplete(autocomplete_user_registered_events),
    )
    @option("confirm", description="Confirmation of the operation", required=False)
    async def command_unregister(self, ctx: ApplicationContext, event: str, confirm: bool = False) -> None:
        if not (await is_operation_confirmed(ctx, confirm)):
            return

        guild: PycordGuild = await self.bot.find_guild(ctx.guild.id)

        try:
            pycord_event: PycordEvent = await self.bot.find_event(event_id=event)
        except (InvalidId, RuntimeError):
            # TODO Make a nice message
            await ctx.respond("Event was not found.")
            return

        if not guild.is_configured():
            await ctx.respond(self.bot._("guild_unconfigured", "messages", locale=ctx.locale))
            return

        user: PycordUser = await self.bot.find_user(ctx.author, ctx.guild)

        if user.is_jailed:
            # TODO Make a nice message
            await ctx.respond("You are jailed and cannot interact with events. Please, contact the administrator.")
            return

        if pycord_event._id not in user.registered_event_ids:
            # TODO Make a nice message
            await ctx.respond("You are not registered for this event.")
            return

        await user.event_unregister(pycord_event._id, cache=self.bot.cache)

        # TODO Text channel must be locked and updated

        await ctx.respond("Ok.")


def setup(bot: PycordBot) -> None:
    bot.add_cog(CogUnregister(bot))