"""PostgreSQL order repository."""

from collections.abc import Sequence
from contextlib import AbstractAsyncContextManager
from dataclasses import dataclass
from datetime import datetime
from typing import Any

from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker

from app.domain.cdek_polling import TERMINAL_ORDER_STATUSES
from app.repositories.order.models import Order


@dataclass(frozen=True)
class OrderData:
    order_uuid: str
    payment_url: str
    price: int
    tariff_code: str
    provider: str
    account_email: str
    payload: dict[str, Any]


class OrderRepository:
    def __init__(self, session_factory: async_sessionmaker[AsyncSession]) -> None:
        self._session_factory = session_factory

    def session(self) -> AbstractAsyncContextManager[AsyncSession]:
        return self._session_factory.begin()

    async def create_order(self, session: AsyncSession, order_data: OrderData) -> Order:
        order = Order(
            order_uuid=order_data.order_uuid,
            payment_url=order_data.payment_url,
            price=order_data.price,
            tariff_code=order_data.tariff_code,
            provider=order_data.provider,
            account_email=order_data.account_email,
            payload=order_data.payload,
        )
        session.add(order)
        await session.flush()
        await session.refresh(order)
        return order

    async def get_order_by_order_uuid(
        self,
        session: AsyncSession,
        order_uuid: str,
    ) -> Order | None:
        result = await session.execute(
            select(Order).where(Order.order_uuid == order_uuid)
        )
        return result.scalar_one_or_none()

    async def mark_payment_status(
        self,
        session: AsyncSession,
        order_uuid: str,
        status: str,
        payment_id: int,
    ) -> Order | None:
        order = await self.get_order_by_order_uuid(session, order_uuid)
        if order is None:
            return None

        order.payment_status = status
        order.tbank_payment_id = payment_id
        await session.flush()
        return order

    async def mark_cdek_order_registered(
        self,
        session: AsyncSession,
        order_uuid: str,
        cdek_order_uuid: str,
    ) -> Order | None:
        order = await self.get_order_by_order_uuid(session, order_uuid)
        if order is None:
            return None

        order.cdek_order_uuid = cdek_order_uuid
        await session.flush()
        return order

    async def mark_cse_order_registered(
        self,
        session: AsyncSession,
        order_uuid: str,
        cse_order_number: str,
    ) -> Order | None:
        order = await self.get_order_by_order_uuid(session, order_uuid)
        if order is None:
            return None

        order.cse_order_number = cse_order_number
        await session.flush()
        return order

    async def list_orders_pending_waybill(
        self,
        session: AsyncSession,
        *,
        limit: int,
    ) -> Sequence[Order]:
        statement = (
            select(Order)
            .where(
                Order.cdek_order_uuid.is_not(None),
                Order.cdek_waybill_url.is_(None),
                (
                    Order.cdek_order_status.is_(None)
                    | Order.cdek_order_status.not_in(TERMINAL_ORDER_STATUSES)
                ),
            )
            .order_by(Order.cdek_polled_at.asc().nulls_first())
            .limit(limit)
            .with_for_update(skip_locked=True)
        )
        result = await session.execute(statement)
        return result.scalars().all()

    async def record_order_poll(
        self,
        session: AsyncSession,
        *,
        order_uuid: str,
        order_status: str | None,
        waybill_uuid: str | None,
        polled_at: datetime,
    ) -> Order | None:
        order = await self.get_order_by_order_uuid(session, order_uuid)
        if order is None:
            return None

        order.cdek_order_status = order_status
        if waybill_uuid is not None and order.cdek_waybill_uuid is None:
            order.cdek_waybill_uuid = waybill_uuid
        order.cdek_polled_at = polled_at
        await session.flush()
        return order

    async def record_waybill_poll(
        self,
        session: AsyncSession,
        *,
        order_uuid: str,
        waybill_url: str | None,
        polled_at: datetime,
    ) -> Order | None:
        order = await self.get_order_by_order_uuid(session, order_uuid)
        if order is None:
            return None

        if waybill_url is not None and order.cdek_waybill_url is None:
            order.cdek_waybill_url = waybill_url
        order.cdek_polled_at = polled_at
        await session.flush()
        return order

    async def record_payment_email_sent(
        self,
        session: AsyncSession,
        *,
        order_uuid: str,
        sent_at: datetime,
    ) -> Order | None:
        order = await self.get_order_by_order_uuid(session, order_uuid)
        if order is None:
            return None

        if order.payment_email_sent_at is None:
            order.payment_email_sent_at = sent_at
            await session.flush()
        return order

    async def list_orders_pending_waybill_email(
        self,
        session: AsyncSession,
        *,
        limit: int,
    ) -> Sequence[Order]:
        statement = (
            select(Order)
            .where(
                Order.cdek_waybill_url.is_not(None),
                Order.waybill_email_sent_at.is_(None),
            )
            .order_by(Order.created_at.asc())
            .limit(limit)
            .with_for_update(skip_locked=True)
        )
        result = await session.execute(statement)
        return result.scalars().all()

    async def record_waybill_email_sent(
        self,
        session: AsyncSession,
        *,
        order_uuid: str,
        sent_at: datetime,
    ) -> Order | None:
        order = await self.get_order_by_order_uuid(session, order_uuid)
        if order is None:
            return None

        if order.waybill_email_sent_at is None:
            order.waybill_email_sent_at = sent_at
            await session.flush()
        return order