from collections import defaultdict
from typing import List, Tuple
from abc import ABC

import discord
from redbot.core import Config, modlog, commands
from redbot.core.bot import Red
from redbot.core.i18n import Translator, cog_i18n
from .casetypes import CASETYPES
from .events import Events
from .kickban import KickBanMixin
from .movetocore import MoveToCore
from .names import ModInfo
from .slowmode import Slowmode
from .settings import ModSettings

_ = T_ = Translator("Mod", __file__)

__version__ = "1.0.0"


class CompositeMetaClass(type(commands.Cog), type(ABC)):
    """
    This allows the metaclass used for proper type detection to
    coexist with discord.py's metaclass
    """

    pass


@cog_i18n(_)
class Mod(
    ModSettings,
    Events,
    KickBanMixin,
    MoveToCore,
    ModInfo,
    Slowmode,
    commands.Cog,
    metaclass=CompositeMetaClass,
):
    """Moderation tools."""

    default_global_settings = {"version": ""}

    default_guild_settings = {
        "ban_mention_spam": False,
        "delete_repeats": -1,
        "ignored": False,
        "respect_hierarchy": True,
        "delete_delay": -1,
        "reinvite_on_unban": False,
        "current_tempbans": [],
        "dm_on_kickban": False,
        "default_days": 0,
    }

    default_channel_settings = {"ignored": False}

    default_member_settings = {"past_nicks": [], "perms_cache": {}, "banned_until": False}

    default_user_settings = {"past_names": []}

    def __init__(self, bot: Red):
        super().__init__()
        self.bot = bot

        self.settings = Config.get_conf(self, 4961522000, force_registration=True)
        self.settings.register_global(**self.default_global_settings)
        self.settings.register_guild(**self.default_guild_settings)
        self.settings.register_channel(**self.default_channel_settings)
        self.settings.register_member(**self.default_member_settings)
        self.settings.register_user(**self.default_user_settings)
        self.cache: dict = {}
        self.tban_expiry_task = self.bot.loop.create_task(self.check_tempban_expirations())
        self.last_case: dict = defaultdict(dict)

    async def initialize(self):
        await self._maybe_update_config()

    def cog_unload(self):
        self.tban_expiry_task.cancel()

    async def _maybe_update_config(self):
        """Maybe update `delete_delay` value set by Config prior to Mod 1.0.0."""
        if await self.settings.version():
            return
        guild_dict = await self.settings.all_guilds()
        for guild_id, info in guild_dict.items():
            delete_repeats = info.get("delete_repeats", False)
            if delete_repeats:
                val = 3
            else:
                val = -1
            await self.settings.guild(discord.Object(id=guild_id)).delete_repeats.set(val)
        await self.settings.version.set(__version__)

    # TODO: Move this to core.
    # This would be in .movetocore , but the double-under name here makes that more trouble
    async def bot_check(self, ctx):
        """Global check to see if a channel or server is ignored.

        Any users who have permission to use the `ignore` or `unignore` commands
        surpass the check.
        """
        perms = ctx.channel.permissions_for(ctx.author)
        surpass_ignore = (
            isinstance(ctx.channel, discord.abc.PrivateChannel)
            or perms.manage_guild
            or await ctx.bot.is_owner(ctx.author)
            or await ctx.bot.is_admin(ctx.author)
        )
        if surpass_ignore:
            return True
        guild_ignored = await self.settings.guild(ctx.guild).ignored()
        chann_ignored = await self.settings.channel(ctx.channel).ignored()
        return not (guild_ignored or chann_ignored and not perms.manage_channels)