"""
Classes used to handle bot events and errors.

*Classes*
---------
    EventHandler
    ErrorHandler
"""
import traceback  # Used to get the traceback of errors

import discord  # Used to init discord.Game and discord.Status, as well
                # as compare errors to discord errors and as typehints
from discord.ext import commands  # Used to compare errors with command
                                  # errors

from discord_slash.context import SlashContext, ComponentContext
from gwendolyn.utils.util_functions import decode_id


class EventHandler():
    """
    Handles bot events.

    *Methods*
    ---------
        on_ready()
        on_slash_command(ctx: discord_slash.context.SlashContext)
        on_reaction_add(ctx: discord_slash.context.SlashContext)
    """

    def __init__(self, bot):
        """Initialize the handler."""
        self.bot = bot

    async def on_ready(self):
        """Log and sets status when it logs in."""
        await self.bot.database_funcs.imdb_commands()
        name = self.bot.user.name
        userid = str(self.bot.user.id)
        logged_in_message = f"Logged in as {name}, {userid}"
        self.bot.log(logged_in_message, level=25)
        game = discord.Game("Use /help for commands")

        online_status = discord.Status.online
        await self.bot.change_presence(activity=game, status=online_status)

    async def on_slash_command(self, ctx: SlashContext):
        """Log when a slash command is given."""
        if ctx.subcommand_name is not None:
            subcommand = f" {ctx.subcommand_name} "
        else:
            subcommand = " "

        if ctx.subcommand_group is not None:
            sub_command_group = f"{ctx.subcommand_group} "
        else:
            sub_command_group = ""

        args = " ".join([str(i) for i in ctx.args])
        full_command = f"/{ctx.command}{subcommand}{sub_command_group}{args}"
        log_message = f"{ctx.author.display_name} ran {full_command}"
        self.bot.log(log_message, str(ctx.channel_id), level=25)

    async def on_component(self, ctx: ComponentContext):
        info = decode_id(ctx.custom_id)
        self.bot.log(f"Component action with info {info}")
        channel = ctx.origin_message.channel

        if info[0].lower() == "plex":
            if info[1].lower() == "movie":
                await self.bot.other.plex.add_movie(
                    ctx.origin_message,
                    info[2],
                    not isinstance(channel, discord.DMChannel)
                )

            elif info[1].lower() == "show":
                await self.bot.other.plex.add_show(
                    ctx.origin_message,
                    info[2],
                    not isinstance(channel, discord.DMChannel)
                )

        elif info[0].lower() == "hangman":
            if str(ctx.author_id) == info[2]:
                if info[1].lower() == "guess":
                    await self.bot.games.hangman.guess(ctx, *info[3:])
                elif info[1].lower() == "end":
                    await self.bot.games.hangman.stop(ctx, *info[3:])

        elif info[0].lower() == "connectfour":
            connect_four = self.bot.games.connect_four
            if info[1].lower() == "place" and str(ctx.author_id) == info[2]:
                params = [
                    ctx,
                    info[3],
                    int(info[4]),
                    [int(info[5]), int(info[6])],
                    int(info[7]),
                    ctx.author_id,
                    int(info[8])
                ]
                await connect_four.place_piece(*params)
            if info[1].lower() == "end":
                if str(ctx.author_id) in [info[2], info[3]]:
                    params = [
                        ctx, [int(info[2]), int(info[3])], info[4], info[5]
                    ]
                    await connect_four.surrender(*params)



class ErrorHandler():
    """
    Handles errors.

    *Methods*
    ---------
        on_slash_command_error(ctx: discord_slash.context.SlashContext,
                               error: Exception)
        on_error(method: str)
    """

    def __init__(self, bot):
        """Initialize the handler."""
        self.bot = bot

    async def on_slash_command_error(self, ctx: SlashContext,
                                     error: Exception):
        """Log when there's a slash command."""
        if isinstance(error, commands.CommandNotFound):
            await ctx.send("That's not a command")
        elif isinstance(error, discord.errors.NotFound):
            self.bot.log("Deleted message before I could add all reactions")
        elif isinstance(error, commands.errors.MissingRequiredArgument):
            self.bot.log(f"{error}", str(ctx.channel_id))
            await ctx.send(self.bot.long_strings["missing parameters"])
        else:
            params = [type(error), error, error.__traceback__]
            exception = traceback.format_exception(*params)

            exception_string = "".join(exception)
            log_messages = [f"exception in /{ctx.name}", f"{exception_string}"]
            self.bot.log(log_messages, str(ctx.channel_id), 40)
            if isinstance(error, discord.errors.NotFound):
                self.bot.log("Context is non-existant", level=40)
            else:
                await ctx.send("Something went wrong")

    async def on_error(self, method: str):
        """Log when there's an error."""
        exception = traceback.format_exc()

        exception_string = "".join(exception)
        log_messages = [f"exception in {method}", f"{exception_string}"]
        self.bot.log(log_messages, level=40)