import logging
from discord.ext import commands

LOGGER = logging.getLogger("Discord_Radio_Bot.LinkCop")


class ClearMessages(commands.Cog):
    def __init__(self, bot):
        self.Bot = bot

    @commands.command(name='clear',
                      help="Use this command to clear a given number of messages from the channel it is called in.\n"
                           "There is a limit of 100 messages. Please be patient, it may take a while to process a large request."
                           "Example command:\n"
                           "\t@ clear\n"
                           "\t@ clear 10",
                      breif="Clear x messages in the channel it's called in")
    async def clear(self, ctx, amount=2):
        member = ctx.author.display_name
        member_id = ctx.author.id
        mtn_member = f"<@{member_id}>"

        if isinstance(amount, int):
            if not amount > 0:
                ctx.channel.send(f"{member}, the number needs to be positive...")

            else:
                LOGGER.info(f"Clear {amount} messages requested by {member}")

                authors = {}
                async for message in ctx.channel.history(limit=amount):
                    if message.author not in authors:
                        authors[message.author] = 1
                    else:
                        authors[message.author] += 1
                    await message.delete()

                msg = f"{mtn_member}, I deleted {sum(authors.values())} messages from {len(authors.keys())} users:\n"
                LOGGER.debug(f"Deleted {sum(authors.values())} messages from {ctx.message.channel}")

                for author in authors.keys():
                    msg += f"\t{str(author).split('#', 1)[0]}: {authors[author]}\n"
                    LOGGER.debug(f"Deleted {authors[author]} messages from {author}")

                await ctx.channel.send(msg)

        else:
            ctx.channel.send(f"{member}, you should check out the 'help' section...")


def setup(bot: commands.Bot):
    bot.add_cog(ClearMessages(bot))