"""Localization & media-ref repositories — Phase 11.5."""
from __future__ import annotations

from typing import Sequence
from uuid import UUID

from sqlalchemy import func, select, update

from app.models.localization import (
    ExperienceLocalization,
    ExperienceMediaRef,
    SiteLocaleBinding,
)
from app.models.types import LocalizationTarget
from app.repositories.base import TenantBaseRepository
from app.specifications.localization import (
    LocalizationListSpec,
    MediaRefListSpec,
    SiteLocaleBindingListSpec,
)


class SiteLocaleBindingRepository(TenantBaseRepository[SiteLocaleBinding]):
    model = SiteLocaleBinding

    async def get_by_site_profile(
        self, tenant_id: UUID, site_id: UUID, locale_profile_id: UUID
    ) -> SiteLocaleBinding | None:
        stmt = select(self.model).where(
            self.model.tenant_id == tenant_id,
            self.model.site_id == site_id,
            self.model.locale_profile_id == locale_profile_id,
            self.model.is_deleted.is_(False),
        )
        result = await self.session.execute(stmt)
        return result.scalar_one_or_none()

    async def clear_default_for_site(
        self, tenant_id: UUID, site_id: UUID, *, except_id: UUID | None = None
    ) -> None:
        stmt = (
            update(self.model)
            .where(
                self.model.tenant_id == tenant_id,
                self.model.site_id == site_id,
                self.model.is_deleted.is_(False),
                self.model.is_default.is_(True),
            )
            .values(is_default=False)
        )
        if except_id is not None:
            stmt = stmt.where(self.model.id != except_id)
        await self.session.execute(stmt)

    async def list_filtered(
        self,
        tenant_id: UUID,
        *,
        offset: int,
        limit: int,
        spec: SiteLocaleBindingListSpec | None = None,
    ) -> tuple[Sequence[SiteLocaleBinding], int]:
        base = select(self.model).where(
            self.model.tenant_id == tenant_id,
            self.model.is_deleted.is_(False),
        )
        count_base = select(func.count()).select_from(self.model).where(
            self.model.tenant_id == tenant_id,
            self.model.is_deleted.is_(False),
        )
        if spec is not None:
            base = spec.apply(base)
            for clause in spec.filter_clauses():
                count_base = count_base.where(clause)
        else:
            base = base.order_by(self.model.sort_order.asc())
        total = int((await self.session.execute(count_base)).scalar_one())
        result = await self.session.execute(base.offset(offset).limit(limit))
        return result.scalars().all(), total


class ExperienceLocalizationRepository(
    TenantBaseRepository[ExperienceLocalization]
):
    model = ExperienceLocalization

    async def get_by_target_locale(
        self,
        tenant_id: UUID,
        target_type: LocalizationTarget,
        target_id: UUID,
        locale: str,
    ) -> ExperienceLocalization | None:
        stmt = select(self.model).where(
            self.model.tenant_id == tenant_id,
            self.model.target_type == target_type,
            self.model.target_id == target_id,
            self.model.locale == locale,
            self.model.is_deleted.is_(False),
        )
        result = await self.session.execute(stmt)
        return result.scalar_one_or_none()

    async def list_filtered(
        self,
        tenant_id: UUID,
        *,
        offset: int,
        limit: int,
        spec: LocalizationListSpec | None = None,
    ) -> tuple[Sequence[ExperienceLocalization], int]:
        base = select(self.model).where(
            self.model.tenant_id == tenant_id,
            self.model.is_deleted.is_(False),
        )
        count_base = select(func.count()).select_from(self.model).where(
            self.model.tenant_id == tenant_id,
            self.model.is_deleted.is_(False),
        )
        if spec is not None:
            base = spec.apply(base)
            for clause in spec.filter_clauses():
                count_base = count_base.where(clause)
        else:
            base = base.order_by(self.model.created_at.desc())
        total = int((await self.session.execute(count_base)).scalar_one())
        result = await self.session.execute(base.offset(offset).limit(limit))
        return result.scalars().all(), total


class ExperienceMediaRefRepository(TenantBaseRepository[ExperienceMediaRef]):
    model = ExperienceMediaRef

    async def list_filtered(
        self,
        tenant_id: UUID,
        *,
        offset: int,
        limit: int,
        spec: MediaRefListSpec | None = None,
    ) -> tuple[Sequence[ExperienceMediaRef], int]:
        base = select(self.model).where(
            self.model.tenant_id == tenant_id,
            self.model.is_deleted.is_(False),
        )
        count_base = select(func.count()).select_from(self.model).where(
            self.model.tenant_id == tenant_id,
            self.model.is_deleted.is_(False),
        )
        if spec is not None:
            base = spec.apply(base)
            for clause in spec.filter_clauses():
                count_base = count_base.where(clause)
        else:
            base = base.order_by(self.model.sort_order.asc())
        total = int((await self.session.execute(count_base)).scalar_one())
        result = await self.session.execute(base.offset(offset).limit(limit))
        return result.scalars().all(), total