from __future__ import annotations

from config import ADMIN_ID
from db.storage import load_stats, save_stats
from db.users import get, save


async def apply_referral_payout(bot, user_id: int, username: str | None, payout: float, referral_percent: int) -> float:
    profile = get(user_id)
    if not profile or not profile.referrer:
        return 0.0

    ref_amount = round(payout * referral_percent / 100, 2)
    ref_profile = get(profile.referrer)
    if not ref_profile:
        return 0.0

    ref_profile.balance += ref_amount
    ref_profile.total_earned += ref_amount
    ref_profile.referral_earned += ref_amount
    save(profile.referrer, ref_profile)

    stats = load_stats()
    stats.total_paid_referral += ref_amount
    save_stats(stats)

    try:
        await bot.send_message(
            profile.referrer,
            f"💸 Реферал @{username or '—'} заработал {payout:.2f} ₽\n"
            f"Вам начислено: <b>{ref_amount:.2f} ₽</b>",
            parse_mode="HTML",
        )
    except Exception:
        pass

    return ref_amount