from typing import Sequence, Optional, Tuple, Literal

from sqlalchemy import select, desc, or_, func, String
from sqlalchemy.ext.asyncio import AsyncSession

from app.domain.models import Lens


class LensesRepository:
    def __init__(self, db: AsyncSession):
        self.db = db

    async def get_all(
            self,
            skip: int = 0,
            limit: int = 10,
            search: str = None,
            sort_order: Literal["asc", "desc"] = "desc",
            tor: float = None,
            diameter: float = None,
            preset_refraction: float = None,
            periphery_toricity: float = None,
            side: str = "all",
            issued: bool = None,
            trial: float = None,
    ) -> Tuple[Sequence[Lens], int]:
        stmt = select(Lens)
        count_stmt = select(func.count()).select_from(Lens)

        if search:
            search = f"%{search}%"
            stmt = stmt.filter(
                or_(
                    Lens.tor.cast(String).ilike(search),
                    Lens.diameter.cast(String).ilike(search),
                    Lens.preset_refraction.cast(String).ilike(search),
                    Lens.periphery_toricity.cast(String).ilike(search),
                    Lens.side.cast(String).ilike(search),
                    Lens.fvc.cast(String).ilike(search),
                    Lens.trial.cast(String).ilike(search),
                    Lens.esa.cast(String).ilike(search),
                )
            )
            count_stmt = count_stmt.filter(
                or_(
                    Lens.tor.cast(String).ilike(search),
                    Lens.diameter.cast(String).ilike(search),
                    Lens.preset_refraction.cast(String).ilike(search),
                    Lens.periphery_toricity.cast(String).ilike(search),
                    Lens.side.cast(String).ilike(search),
                    Lens.fvc.cast(String).ilike(search),
                    Lens.trial.cast(String).ilike(search),
                    Lens.esa.cast(String).ilike(search),
                )
            )

        if tor is not None:
            stmt = stmt.filter(Lens.tor == tor)
            count_stmt = count_stmt.filter(Lens.tor == tor)
        if diameter is not None:
            stmt = stmt.filter(Lens.diameter == diameter)
            count_stmt = count_stmt.filter(Lens.diameter == diameter)
        if preset_refraction is not None:
            stmt = stmt.filter(Lens.preset_refraction == preset_refraction)
            count_stmt = count_stmt.filter(Lens.preset_refraction == preset_refraction)
        if periphery_toricity is not None:
            stmt = stmt.filter(Lens.periphery_toricity == periphery_toricity)
            count_stmt = count_stmt.filter(Lens.periphery_toricity == periphery_toricity)
        if side != "all":
            stmt = stmt.filter(Lens.side == side)
            count_stmt = count_stmt.filter(Lens.side == side)
        if issued is not None:
            stmt = stmt.filter(Lens.issued == issued)
            count_stmt = count_stmt.filter(Lens.issued == issued)
        if trial is not None:
            stmt = stmt.filter(Lens.trial == trial)
            count_stmt = count_stmt.filter(Lens.trial == trial)

        stmt = stmt.order_by(Lens.id.desc() if sort_order == "desc" else Lens.id.asc())

        stmt = stmt.offset(skip).limit(limit)
        result = await self.db.execute(stmt)
        lenses = result.scalars().all()

        count_result = await self.db.execute(count_stmt)
        total_count = count_result.scalar()

        return lenses, total_count

    async def get_all_not_issued(self) -> Sequence[Lens]:
        stmt = select(Lens).filter_by(issued=False).order_by(desc(Lens.id))
        result = await self.db.execute(stmt)
        return result.scalars().all()

    async def get_by_id(self, lens_id: int) -> Optional[Lens]:
        stmt = select(Lens).filter_by(id=lens_id)
        result = await self.db.execute(stmt)
        return result.scalars().first()

    async def create(self, lens: Lens) -> Lens:
        self.db.add(lens)
        await self.db.commit()
        await self.db.refresh(lens)
        return lens

    async def update(self, lens: Lens) -> Lens:
        await self.db.merge(lens)
        await self.db.commit()
        return lens

    async def delete(self, lens: Lens) -> Lens:
        await self.db.delete(lens)
        await self.db.commit()
        return lens