import traceback

import discord
from discord import app_commands
from discord.ext import commands

from cogs.utils import embed_templates
from cogs.utils.misc_utils import ignore_exception


class Errors(commands.Cog):
    """Error handlers for commands"""

    def __init__(self, bot: commands.Bot):
        """
        Parameters
        ----------
        bot (commands.Bot): The bot instance
        """

        self.bot = bot
        bot.tree.on_error = self.on_app_command_error  # Set error handler for slash commands

    @commands.Cog.listener()
    async def on_command(self, ctx: commands.Context):
        """
        Logs prefix command execution metadata

        Parameters
        ----------
        ctx (commands.Context): Context object
        """

        self.bot.logger.info(
            f'{"❌ " if ctx.command_failed else "✔ "} {ctx.command} | ' +
            f'{ctx.author.name}#{ctx.author.discriminator} ({ctx.author.id}) | ' +
            f'{ctx.guild.id}-{ctx.channel.id}-{ctx.message.id}'
        )

    @commands.Cog.listener()
    async def on_app_command_completion(self, interaction: discord.Interaction, command: app_commands.Command | app_commands.ContextMenu):
        """
        Logs slash command execution metadata

        Parameters
        ----------
        interaction (discord.Interaction): Slash command context object
        command (app_commands.Command | app_commands.ContextMenu): Command object
        """

        self.bot.logger.info(
            f'{"❌ " if interaction.command_failed else "✔ "} {command.name} | ' +
            f'{interaction.user.name}#{interaction.user.discriminator} ({interaction.user.id}) | ' +
            f'{interaction.guild_id}-{interaction.channel_id}-{interaction.id}'
        )

    @commands.Cog.listener()
    async def on_command_error(self, ctx: commands.Context, error: commands.CommandError):
        """
        Handle prefix command errors

        Parameters
        ----------
        ctx (commands.Context): Context object
        error (commands.CommandError): Eror context object
        """

        # Reset cooldown if command throws AttributeError
        with ignore_exception(AttributeError):
            self.bot.get_command(f'{ctx.command}').reset_cooldown(ctx)

        # Ignore command's own error handling
        if hasattr(ctx.command, 'on_error'):
            return

        # Ignored errors
        ignored = commands.CommandNotFound
        error = getattr(error, 'original', error)
        if isinstance(error, ignored):
            return

        send_help = (
            commands.MissingRequiredArgument,
            commands.TooManyArguments,
            commands.BadArgument
        )
        if isinstance(error, send_help):
            self.bot.get_command(f'{ctx.command}').reset_cooldown(ctx)
            return await ctx.send_help(ctx.command)

        elif isinstance(error, commands.BotMissingPermissions):
            permissions = ', '.join(error.missing_perms)
            text = 'Jeg mangler følgende tillatelser:\n\n' + \
                   f'```\n{permissions}\n```'
            return await ctx.send(text)

        elif isinstance(error, commands.MissingPermissions):
            permissions = ', '.join(error.missing_perms)
            text = 'Du mangler følgende tillatelser\n\n' + \
                   f'```\n{permissions}\n```'
            return await ctx.send(text)

        elif isinstance(error, commands.NotOwner):
            text = 'Bare boteieren kan gjøre dette'
            return await ctx.send(text)

        elif isinstance(error, commands.CommandOnCooldown):
            text = 'Kommandoen har nettopp blitt brukt' + \
                   f'Prøv igjen om `{error.retry_after:.1f}` sekunder.'
            return await ctx.send(text)

        elif isinstance(error, commands.NoPrivateMessage):
            try:
                text = 'Denne kommandoen kan bare utføres i servere'
                return await ctx.send(text)
            except discord.errors.Forbidden:  # Thrown if bot is blocked by the user or if the user has closed their DMs
                print('DM Blocked!')

        elif isinstance(error, commands.DisabledCommand):
            pass

        elif isinstance(error, commands.CheckFailure):
            return

        embed = embed_templates.error_fatal(ctx, text='En ukjent feil oppstod!')
        await ctx.send(embed=embed)

        # Log full exception to file
        self.bot.logger.error(''.join(traceback.format_exception(type(error), error, error.__traceback__)))

    async def on_app_command_error(self, interaction: discord.Interaction, error: app_commands.AppCommandError):
        """
        Handle slash command errors

        Parameters
        ----------
        interaction (discord.Interaction): Slash command context object
        error (app_commands.AppCommandError): Eror context object
        """

        # Log command usage, just in case
        await self.on_app_command_completion(interaction, interaction.command)

        if isinstance(error, commands.BotMissingPermissions):
            permissions = ', '.join(error.missing_perms)
            embed = embed_templates.error_warning(interaction, text='Jeg mangler følgende tillatelser:\n\n' +
                                                                    f'```\n{permissions}\n```')
            return await interaction.response.send_message(embed=embed)

        elif isinstance(error, commands.MissingPermissions):
            permissions = ', '.join(error.missing_perms)
            embed = embed_templates.error_warning(interaction, text='Du mangler følgende tillatelser\n\n' +
                                                                    f'```\n{permissions}\n```')
            return await interaction.response.send_message(embed=embed)

        elif isinstance(error, commands.NotOwner):
            embed = embed_templates.error_fatal(interaction, text='Bare boteieren kan gjøre dette')
            return await interaction.response.send_message(embed=embed)

        elif isinstance(error, commands.CommandOnCooldown):
            embed = embed_templates.error_warning(interaction, text='Kommandoen har nettopp blitt brukt' +
                                                                    f'Prøv igjen om `{error.retry_after:.1f}` sekunder.')
            return await interaction.response.send_message(embed=embed)

        embed = embed_templates.error_fatal(interaction, text='En ukjent feil oppstod!')
        await interaction.response.send_message(embed=embed)

        # Log full exception to file
        self.bot.logger.error(''.join(traceback.format_exception(type(error), error, error.__traceback__)))


async def setup(bot: commands.Bot):
    """
    Add the cog to the bot on extension load

    Parameters
    ----------
    bot (commands.Bot): Bot instance
    """

    await bot.add_cog(Errors(bot))