from asyncio import sleep

from discord.ext import commands
from discord import Embed, RawReactionActionEvent

from administrator.check import is_enabled
from administrator.logger import logger
from administrator.utils import event_is_enabled

extension_name = "purge"
logger = logger.getChild(extension_name)


class Purge(commands.Cog):
    def __init__(self, bot: commands.Bot):
        self.bot = bot
        self.purges = {}

    def description(self):
        return "Purge all messages between the command and the next add reaction"

    @commands.group("purge", pass_context=True)
    @is_enabled()
    @commands.guild_only()
    @commands.has_permissions(manage_messages=True)
    async def purge(self, ctx: commands.Context):
        if ctx.invoked_subcommand is None:
            self.purges[ctx.message.author.id] = ctx.message
            await ctx.message.add_reaction("\U0001f44d")

            await sleep(2*60)
            try:
                if self.purges[ctx.message.author.id] == ctx.message:
                    await ctx.message.clear_reactions()
                    del self.purges[ctx.message.author.id]
            except:
                pass

    @purge.group("help", pass_context=True)
    @commands.guild_only()
    async def purge_help(self, ctx: commands.Context):
        embed = Embed(title="Purge help")
        embed.add_field(name="purge", value="Purge all message delimited by the command to your next reaction",
                        inline=False)
        await ctx.send(embed=embed)

    @commands.Cog.listener()
    async def on_raw_reaction_add(self, payload: RawReactionActionEvent):
        if payload.guild_id:
            if not event_is_enabled(self.qualified_name, payload.guild_id):
                return
            user = self.bot.get_user(payload.user_id)
            message = await self.bot.get_guild(payload.guild_id).get_channel(payload.channel_id)\
                .fetch_message(payload.message_id)
            if user.id in self.purges:
                if message.channel == self.purges[user.id].channel:
                    async with message.channel.typing():
                        await message.channel.purge(before=self.purges[user.id], after=message,
                                                             limit=None)
                        await self.purges[user.id].delete()
                        await message.delete()
                        del self.purges[user.id]


def setup(bot):
    logger.info(f"Loading...")
    try:
        bot.add_cog(Purge(bot))
    except Exception as e:
        logger.error(f"Error loading: {e}")
    else:
        logger.info(f"Load successful")


def teardown(bot):
    logger.info(f"Unloading...")
    try:
        bot.remove_cog("Purge")
    except Exception as e:
        logger.error(f"Error unloading: {e}")
    else:
        logger.info(f"Unload successful")