import discord
from redbot.core import commands


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

    def build_help_embed(self, message, prefix_text, main_prefix):
        embed = discord.Embed(
            title="Pomoc",
            description=(
                f"Użyj `{main_prefix}help`, aby zobaczyć wszystkie komendy bota."
            ),
            color=0xEB459E
        )

        author_name = str(message.author)
        author_icon_url = message.author.display_avatar.url if message.author.display_avatar else None

        if author_icon_url:
            embed.set_author(name=author_name, icon_url=author_icon_url)
        else:
            embed.set_author(name=author_name)

        if message.guild:
            if message.guild.icon:
                embed.set_thumbnail(url=message.guild.icon.url)
                embed.set_footer(
                    text=message.guild.name,
                    icon_url=message.guild.icon.url
                )
            else:
                embed.set_footer(text=message.guild.name)

        return embed

    @commands.Cog.listener()
    async def on_message_without_command(self, message):
        if message.author.bot:
            return

        if message.guild is None:
            return

        if self.bot.user is None:
            return

        mention_forms = {
            f"<@{self.bot.user.id}>",
            f"<@!{self.bot.user.id}>"
        }

        content = message.content.strip()

        if content in mention_forms:
            prefixes = await self.bot.get_valid_prefixes(message.guild)

            visible_prefixes = [p for p in prefixes if not p.startswith("<@")]
            main_prefix = visible_prefixes[0] if visible_prefixes else prefixes[0]
            prefix_text = ", ".join(visible_prefixes) if visible_prefixes else ", ".join(prefixes)

            embed = self.build_help_embed(message, prefix_text, main_prefix)
            await message.channel.send(embed=embed)