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

class FetchUserCog(commands.Cog, name="FetchUser"):
    """Cog providing a command to fetch a user by ID."""

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

    async def _create_user_embed(self, user: discord.User) -> discord.Embed:
        """Create an embed showing basic information about a user."""
        username = (
            f"{user.name}#{user.discriminator}"
            if user.discriminator != "0"
            else user.name
        )
        embed = discord.Embed(title="User Information", color=discord.Color.blue())
        embed.add_field(name="Username", value=username, inline=False)
        embed.add_field(name="User ID", value=str(user.id), inline=False)
        embed.add_field(name="Bot Account", value=str(user.bot), inline=False)
        embed.add_field(
            name="Created",
            value=user.created_at.strftime("%Y-%m-%d %H:%M UTC"),
            inline=False,
        )
        if user.avatar:
            embed.set_thumbnail(url=user.avatar.url)
        return embed

    async def _fetch_user_and_send(self, sendable, user_id: int):
        try:
            user = await self.bot.fetch_user(user_id)
        except discord.NotFound:
            await sendable("❌ User not found.")
            return
        except discord.HTTPException as e:
            await sendable(f"Failed to fetch user: {e}")
            return

        embed = await self._create_user_embed(user)
        await sendable(embed=embed)

    @commands.hybrid_command(name="fetchuser", description="Fetch a user by ID and show info.")
    async def fetchuser(self, ctx: commands.Context, user_id: int):
        """Fetch a Discord user by ID."""
        await self._fetch_user_and_send(ctx.send, user_id)

async def setup(bot: commands.Bot):
    await bot.add_cog(FetchUserCog(bot))