from config import config
from titanembeds.database import DatabaseInterface
import discord
import aiohttp
import asyncio

class Titan(discord.Client):
    def __init__(self):
        super().__init__()
        self.aiosession = aiohttp.ClientSession(loop=self.loop)
        self.http.user_agent += ' TitanEmbeds-Bot'
        self.database = DatabaseInterface(self)

    def _cleanup(self):
        try:
            self.loop.run_until_complete(self.logout())
        except: # Can be ignored
            pass
        pending = asyncio.Task.all_tasks()
        gathered = asyncio.gather(*pending)
        try:
            gathered.cancel()
            self.loop.run_until_complete(gathered)
            gathered.exception()
        except: # Can be ignored
            pass

    def run(self):
        try:
            self.loop.run_until_complete(self.start(config["bot-token"]))
        except discord.errors.LoginFailure:
            print("Invalid bot token in config!")
        finally:
            try:
                self._cleanup()
            except Exception as e:
                print("Error in cleanup:", e)
            self.loop.close()

    async def on_ready(self):
        print('Titan [DiscordBot]')
        print('Logged in as the following user:')
        print(self.user.name)
        print(self.user.id)
        print('------')

        await self.change_presence(
            game=discord.Game(name="iFrame your server! Visit https://TitanEmbeds.tk/ today!"), status=discord.Status.online
        )

        try:
            await self.database.connect(config["database-uri"] + "?charset=utf8")
        except Exception:
            self.logger.error("Unable to connect to specified database!")
            traceback.print_exc()
            await self.logout()
            return

        for server in self.servers:
            await self.database.update_guild(server)
            if server.large:
                await request_offline_members(server)
            server_bans = await self.get_bans(server)
            for member in server.members:
                banned = member.id in [u.id for u in server_bans]
                await self.database.update_guild_member(
                    member,
                    True,
                    banned
                )
            await self.database.flag_unactive_guild_members(server.id, server.members)
            await self.database.flag_unactive_bans(server.id, server_bans)
        await self.database.remove_unused_guilds(self.servers)

    async def on_message(self, message):
        await self.database.push_message(message)
        # TODO: Will add command handler + ban/kick command

    async def on_message_edit(self, message_before, message_after):
        await self.database.update_message(message_after)

    async def on_message_delete(self, message):
        await self.database.delete_message(message)

    async def on_server_join(self, guild):
        await self.database.update_guild(guild)
        for channel in guild.channels:
            async for message in self.logs_from(channel, limit=50, reverse=True):
                await self.database.push_message(message)
        for member in guild.members:
            update_guild_member(member, True, False)
        banned = self.get_bans(guild)
        for ban in banned:
            update_guild_member(ban, False, True)

    async def on_server_remove(self, guild):
        await self.database.remove_guild(guild)

    async def on_server_update(self, guildbefore, guildafter):
        await self.database.update_guild(guildafter)

    async def on_server_role_create(self, role):
        if role.name == self.user.name and role.managed:
            await asyncio.sleep(2)
        await self.database.update_guild(role.server)

    async def on_server_role_delete(self, role):
        if role.server.me not in role.server.members:
            return
        await self.database.update_guild(role.server)

    async def on_server_role_update(self, rolebefore, roleafter):
        await self.database.update_guild(roleafter.server)

    async def on_channel_delete(self, channel):
        await self.database.update_guild(channel.server)

    async def on_channel_create(self, channel):
        await self.database.update_guild(channel.server)

    async def on_channel_update(self, channelbefore, channelafter):
        await self.database.update_guild(channelafter.server)

    async def on_member_join(self, member):
        await self.database.update_guild_member(member, active=True, banned=False)

    async def on_member_remove(self, member):
        await self.database.update_guild_member(member, active=False, banned=False)

    async def on_member_update(self, memberbefore, memberafter):
        await self.database.update_guild_member(memberafter)

    async def on_member_ban(self, member):
        if role.server.me not in role.server.members:
            return
        await self.database.update_guild_member(member, active=False, banned=True)

    async def on_member_unban(self, member):
        await self.database.update_guild_member(member, active=False, banned=False)
