"""Tracking repositories — Phase 10.7."""
from __future__ import annotations

from typing import Sequence
from uuid import UUID

from sqlalchemy import func, select

from app.models.tracking import (
    CustomerTrackingToken,
    ProofOfDelivery,
    TrackingPoint,
    TrackingSession,
)
from app.repositories.base import TenantBaseRepository
from app.specifications.tracking import (
    CustomerTrackingTokenListSpec,
    ProofOfDeliveryListSpec,
    TrackingSessionListSpec,
)


class TrackingSessionRepository(TenantBaseRepository[TrackingSession]):
    model = TrackingSession

    async def list_filtered(
        self,
        tenant_id: UUID,
        *,
        offset: int = 0,
        limit: int = 20,
        spec: TrackingSessionListSpec | None = None,
    ) -> Sequence[TrackingSession]:
        stmt = select(self.model).where(
            self.model.tenant_id == tenant_id,
            self.model.is_deleted.is_(False),
        )
        if spec is not None:
            stmt = spec.apply(stmt)
        else:
            stmt = stmt.order_by(self.model.created_at.desc())
        stmt = stmt.offset(offset).limit(limit)
        result = await self.session.execute(stmt)
        return result.scalars().all()

    async def count_filtered(
        self, tenant_id: UUID, *, spec: TrackingSessionListSpec | None = None
    ) -> int:
        stmt = 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:
            clauses = spec.filter_clauses()
            if clauses:
                stmt = stmt.where(*clauses)
        result = await self.session.execute(stmt)
        return int(result.scalar_one())


class TrackingPointRepository(TenantBaseRepository[TrackingPoint]):
    model = TrackingPoint

    async def list_for_session(
        self, tenant_id: UUID, tracking_session_id: UUID, *, limit: int = 500
    ) -> Sequence[TrackingPoint]:
        stmt = (
            select(self.model)
            .where(
                self.model.tenant_id == tenant_id,
                self.model.tracking_session_id == tracking_session_id,
            )
            .order_by(self.model.recorded_at.asc())
            .limit(limit)
        )
        result = await self.session.execute(stmt)
        return result.scalars().all()


class ProofOfDeliveryRepository(TenantBaseRepository[ProofOfDelivery]):
    model = ProofOfDelivery

    async def list_filtered(
        self,
        tenant_id: UUID,
        *,
        offset: int = 0,
        limit: int = 20,
        spec: ProofOfDeliveryListSpec | None = None,
    ) -> Sequence[ProofOfDelivery]:
        stmt = select(self.model).where(
            self.model.tenant_id == tenant_id,
            self.model.is_deleted.is_(False),
        )
        if spec is not None:
            stmt = spec.apply(stmt)
        else:
            stmt = stmt.order_by(self.model.created_at.desc())
        stmt = stmt.offset(offset).limit(limit)
        result = await self.session.execute(stmt)
        return result.scalars().all()

    async def count_filtered(
        self, tenant_id: UUID, *, spec: ProofOfDeliveryListSpec | None = None
    ) -> int:
        stmt = 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:
            clauses = spec.filter_clauses()
            if clauses:
                stmt = stmt.where(*clauses)
        result = await self.session.execute(stmt)
        return int(result.scalar_one())


class CustomerTrackingTokenRepository(TenantBaseRepository[CustomerTrackingToken]):
    model = CustomerTrackingToken

    async def get_by_token(
        self, tenant_id: UUID, token: str
    ) -> CustomerTrackingToken | None:
        stmt = select(self.model).where(
            self.model.tenant_id == tenant_id,
            self.model.token == token,
            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 = 0,
        limit: int = 20,
        spec: CustomerTrackingTokenListSpec | None = None,
    ) -> Sequence[CustomerTrackingToken]:
        stmt = select(self.model).where(
            self.model.tenant_id == tenant_id,
            self.model.is_deleted.is_(False),
        )
        if spec is not None:
            stmt = spec.apply(stmt)
        else:
            stmt = stmt.order_by(self.model.created_at.desc())
        stmt = stmt.offset(offset).limit(limit)
        result = await self.session.execute(stmt)
        return result.scalars().all()

    async def count_filtered(
        self, tenant_id: UUID, *, spec: CustomerTrackingTokenListSpec | None = None
    ) -> int:
        stmt = 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:
            clauses = spec.filter_clauses()
            if clauses:
                stmt = stmt.where(*clauses)
        result = await self.session.execute(stmt)
        return int(result.scalar_one())