"""Extraction repository for database operations."""

from sqlalchemy import asc, desc, func, or_
from sqlmodel import select
from sqlmodel.ext.asyncio.session import AsyncSession

from app.models.extraction import Extraction
from app.models.user import User
from app.repositories.base import BaseRepository


class ExtractionRepository(BaseRepository[Extraction]):
    """Repository for extraction database operations."""

    def __init__(self, session: AsyncSession) -> None:
        """Initialize the extraction repository."""
        super().__init__(Extraction, session)

    async def get_by_service_and_id(
        self,
        service: str,
        service_id: str,
    ) -> Extraction | None:
        """Get an extraction by service and service_id."""
        result = await self.session.exec(
            select(Extraction).where(
                Extraction.service == service,
                Extraction.service_id == service_id,
            ),
        )
        return result.first()

    async def get_by_user(self, user_id: int) -> list[Extraction]:
        """Get all extractions for a user."""
        result = await self.session.exec(
            select(Extraction)
            .where(Extraction.user_id == user_id)
            .order_by(desc(Extraction.created_at)),
        )
        return list(result.all())

    async def get_pending_extractions(self) -> list[tuple[Extraction, User]]:
        """Get all pending extractions."""
        result = await self.session.exec(
            select(Extraction, User)
            .join(User, Extraction.user_id == User.id)
            .where(Extraction.status == "pending")
            .order_by(Extraction.created_at),
        )
        return list(result.all())

    async def get_extractions_by_status(self, status: str) -> list[Extraction]:
        """Get extractions by status."""
        result = await self.session.exec(
            select(Extraction)
            .where(Extraction.status == status)
            .order_by(desc(Extraction.created_at)),
        )
        return list(result.all())

    async def get_user_extractions_filtered(
        self,
        user_id: int,
        search: str | None = None,
        sort_by: str = "created_at",
        sort_order: str = "desc",
        status_filter: str | None = None,
        limit: int = 50,
        offset: int = 0,
    ) -> tuple[list[tuple[Extraction, User]], int]:
        """Get extractions for a user with filtering, search, and sorting."""
        base_query = (
            select(Extraction, User)
            .join(User, Extraction.user_id == User.id)
            .where(Extraction.user_id == user_id)
        )

        # Apply search filter
        if search:
            search_pattern = f"%{search}%"
            base_query = base_query.where(
                or_(
                    Extraction.title.ilike(search_pattern),
                    Extraction.url.ilike(search_pattern),
                    Extraction.service.ilike(search_pattern),
                ),
            )

        # Apply status filter
        if status_filter:
            base_query = base_query.where(Extraction.status == status_filter)

        # Get total count before pagination
        count_query = select(func.count()).select_from(
            base_query.subquery()
        )
        count_result = await self.session.exec(count_query)
        total_count = count_result.one()

        # Apply sorting and pagination
        sort_column = getattr(Extraction, sort_by, Extraction.created_at)
        if sort_order.lower() == "asc":
            base_query = base_query.order_by(asc(sort_column))
        else:
            base_query = base_query.order_by(desc(sort_column))

        paginated_query = base_query.limit(limit).offset(offset)
        result = await self.session.exec(paginated_query)
        
        return list(result.all()), total_count

    async def get_all_extractions_filtered(
        self,
        search: str | None = None,
        sort_by: str = "created_at",
        sort_order: str = "desc",
        status_filter: str | None = None,
        limit: int = 50,
        offset: int = 0,
    ) -> tuple[list[tuple[Extraction, User]], int]:
        """Get all extractions with filtering, search, and sorting."""
        base_query = select(Extraction, User).join(User, Extraction.user_id == User.id)

        # Apply search filter
        if search:
            search_pattern = f"%{search}%"
            base_query = base_query.where(
                or_(
                    Extraction.title.ilike(search_pattern),
                    Extraction.url.ilike(search_pattern),
                    Extraction.service.ilike(search_pattern),
                ),
            )

        # Apply status filter
        if status_filter:
            base_query = base_query.where(Extraction.status == status_filter)

        # Get total count before pagination
        count_query = select(func.count()).select_from(
            base_query.subquery()
        )
        count_result = await self.session.exec(count_query)
        total_count = count_result.one()

        # Apply sorting and pagination
        sort_column = getattr(Extraction, sort_by, Extraction.created_at)
        if sort_order.lower() == "asc":
            base_query = base_query.order_by(asc(sort_column))
        else:
            base_query = base_query.order_by(desc(sort_column))

        paginated_query = base_query.limit(limit).offset(offset)
        result = await self.session.exec(paginated_query)
        
        return list(result.all()), total_count