admin_id = 1234567890  # The Discord ID of the bot owner or admin

@bot.command()
async def bot_time(ctx, time_period: str):
    if ctx.author.id != admin_id:
        await ctx.send("You don't have permission to change the bot's uptime.")
        return
    if time_period == "24/7":
        await ctx.send("Bot will stay online 24/7.")
        # Continuous uptime logic can be handled here if desired
    elif time_period.endswith('m'):
        time = int(time_period[:-1])
        await ctx.send(f"Bot will stay online for {time} minutes.")
        await asyncio.sleep(time * 60)
        await ctx.send("Bot has gone offline after the set time.")
        await bot.close()
    elif time_period.endswith('h'):
        time = int(time_period[:-1])
        await ctx.send(f"Bot will stay online for {time} hours.")
        await asyncio.sleep(time * 3600)
        await ctx.send("Bot has gone offline after the set time.")
        await bot.close()
    elif time_period.endswith('d'):
        time = int(time_period[:-1])
        await ctx.send(f"Bot will stay online for {time} days.")
        await asyncio.sleep(time * 86400)
        await ctx.send("Bot has gone offline after the set time.")
        await bot.close()
    else:
        await ctx.send("Invalid time format. Use m, h, or d.")