import aiohttp

import discord

from redbot.core import Config, commands
from redbot.core.bot import Red
from typing import Any

Cog: Any = getattr(commands, "Cog", object)


async def fetch_img(session, url):
    with aiohttp.Timeout(10):
        async with session.get(url) as response:
            assert response.status == 200
            return await response.read()


class StealEmoji(Cog):
    """
    This cog steals emojis and creates servers for them
    """

    default_stolemoji = {
        "guildbank": None,
        "name": None,
        "require_colons": False,
        "managed": False,
        "guild_id": None,
        "url": None,
        "animated": False
    }

    def __init__(self, red: Red):
        self.bot = red
        self.config = Config.get_conf(self, identifier=11511610197108101109111106105)
        default_global = {
            "stolemoji": {},
            "guildbanks": [],
            "on": False
        }

        self.config.register_global(**default_global)

    @commands.group()
    async def stealemoji(self, ctx: commands.Context):
        """
        Base command for this cog. Check help for the commands list.
        """
        if ctx.invoked_subcommand is None:
            pass

    @stealemoji.command(name="collect")
    async def se_collect(self, ctx):
        """Toggles whether emoji's are collected or not"""
        curr_setting = await self.config.on()
        await self.config.on.set(not curr_setting)
        await ctx.send("Collection is now " + str(not curr_setting))

    @stealemoji.command(name="bank")
    async def se_bank(self, ctx):
        """Add current server as emoji bank"""
        await ctx.send("This will upload custom emojis to this server\n"
                       "Are you sure you want to make the current server an emoji bank? (y//n)")

        def check(m):
            return m.content.upper() in ["Y", "YES", "N", "NO"] and m.channel == ctx.channel and m.author == ctx.author

        msg = await self.bot.wait_for('message', check=check)

        if msg.content in ["N", "NO"]:
            await ctx.send("Cancelled")
            return

        async with self.config.guildbanks() as guildbanks:
            guildbanks.append(ctx.guild.id)

        await ctx.send("This server has been added as an emoji bank")

    async def on_reaction_add(self, reaction: discord.Reaction, user: discord.User):
        """Event handler for reaction watching"""
        if not reaction.custom_emoji:
            print("Not a custom emoji")
            return

        if not (await self.config.on()):
            print("Collecting is off")
            return

        emoji = reaction.emoji
        if emoji in self.bot.emojis:
            print("Emoji already in bot.emojis")
            return

        # This is now a custom emoji that the bot doesn't have access to, time to steal it
        # First, do I have an available guildbank?

        guildbank = None
        banklist = await self.config.guildbanks()
        for guild_id in banklist:
            guild = self.bot.get_guild(guild_id)
            if len(guild.emojis) < 50:
                guildbank = guild
                break

        if guildbank is None:
            print("No guildbank to store emoji")
            # Eventually make a new banklist
            return

        # Next, have I saved this emoji before (because uploaded emoji != orignal emoji)

        stolemojis = await self.config.stolemoji()

        if emoji.id in stolemojis:
            print("Emoji has already been stolen")
            return

        # Alright, time to steal it for real
        # path = urlparse(emoji.url).path
        # ext = os.path.splitext(path)[1]

        async with aiohttp.ClientSession() as session:
            img = await fetch_img(session, emoji.url)

        # path = data_manager.cog_data_path(cog_instance=self) / (emoji.name+ext)

        # with path.open("wb") as f:
        # f.write(img)
        # urllib.urlretrieve(emoji.url, emoji.name+ext)

        try:
            await guildbank.create_custom_emoji(name=emoji.name, image=img, reason="Stole from " + str(user))
        except discord.Forbidden as e:
            print("PermissionError - no permission to add emojis")
            raise PermissionError("No permission to add emojis") from e
        except discord.HTTPException as e:
            print("HTTPException exception")
            raise e  # Unhandled error

        # If you get this far, YOU DID IT

        save_dict = self.default_stolemoji.copy()
        e_dict = vars(emoji)

        for k in e_dict:
            if k in save_dict:
                save_dict[k] = e_dict[k]

        save_dict["guildbank"] = guildbank.id

        async with self.config.stolemoji() as stolemoji:
            stolemoji[emoji.id] = save_dict

        # Enable the below if you want to get notified when it works
        # owner = await self.bot.application_info()
        # owner = owner.owner
        # await owner.send("Just added emoji "+str(emoji)+" to server "+str(guildbank))