"""Сервис магазина."""

from __future__ import annotations

from common.analytics import EventType, record
from common.models import Donat, Title
from common.repositories import shop_repo


async def list_titles() -> list[Title]:
    rows = await shop_repo.get_titles_list()
    return [Title(id=int(row["i"]), title=row["n"] or "", price=int(row["p"] or 0)) for row in rows]


async def list_donats() -> list[Donat]:
    rows = await shop_repo.get_donats_list()
    return [Donat(id=int(row["i"]), title=row["n"] or "", price=int(row["p"] or 0)) for row in rows]


async def buy_title(id_user: int, id_title: int) -> bool:
    """Купить звание. Возвращает True при успехе."""
    price = await _title_price(id_title)
    success = await shop_repo.buy_title(id_user, id_title) == 1

    record(
        EventType.PURCHASE_TITLE,
        user_id=id_user,
        payload={"title_id": id_title, "price": price, "success": success},
    )
    if success:
        record(
            EventType.MONEY_SPEND,
            user_id=id_user,
            payload={"amount": price, "reason": "title", "product_id": id_title},
        )
    return success


async def buy_donat(id_user: int, id_donat: int) -> str | None:
    """Купить донат. Возвращает промокод или None при неуспехе."""
    price = await _donat_price(id_donat)
    result = await shop_repo.buy_donat(id_user, id_donat)
    promo = None if result == "-1" else result

    record(
        EventType.PURCHASE_DONAT,
        user_id=id_user,
        payload={"donat_id": id_donat, "price": price, "success": promo is not None},
    )
    if promo is not None:
        record(
            EventType.MONEY_SPEND,
            user_id=id_user,
            payload={"amount": price, "reason": "donat", "product_id": id_donat},
        )
    return promo


async def _title_price(id_title: int) -> int:
    """Цена звания для события покупки (0, если позиция недоступна)."""
    return next((title.price for title in await list_titles() if title.id == id_title), 0)


async def _donat_price(id_donat: int) -> int:
    """Цена доната для события покупки (0, если позиция недоступна)."""
    return next((donat.price for donat in await list_donats() if donat.id == id_donat), 0)