from sqlalchemy import func, or_, select
from sqlalchemy.orm import Session

from app.models.company import Company


class CompaniesRepository:
    def __init__(self, db: Session) -> None:
        self.db = db

    def get_by_key(self, company_key: str) -> Company | None:
        return self.db.scalar(select(Company).where(Company.company_key == company_key))

    def get_by_id(self, company_id: str) -> Company | None:
        return self.db.scalar(select(Company).where(Company.id == company_id))

    def list(self, keyword: str | None = None, limit: int = 100, offset: int = 0) -> tuple[list[Company], int]:
        stmt = select(Company)
        count_stmt = select(func.count()).select_from(Company)
        if keyword:
            pattern = f"%{keyword}%"
            cond = or_(
                Company.company_key.ilike(pattern),
                Company.display_name.ilike(pattern),
                Company.legal_name.ilike(pattern),
            )
            stmt = stmt.where(cond)
            count_stmt = count_stmt.where(cond)

        stmt = stmt.order_by(Company.created_at.desc()).limit(limit).offset(offset)
        return list(self.db.scalars(stmt).all()), int(self.db.scalar(count_stmt) or 0)

    def create(
        self,
        *,
        company_key: str,
        display_name: str,
        legal_name: str | None,
        provider_group_id: str | None = None,
        status: str = "active",
    ) -> Company:
        item = Company(
            company_key=company_key,
            display_name=display_name,
            legal_name=legal_name,
            provider_group_id=provider_group_id,
            status=status,
        )
        self.db.add(item)
        self.db.commit()
        self.db.refresh(item)
        return item

    def update(
        self,
        item: Company,
        *,
        display_name: str | None = None,
        legal_name: str | None = None,
        provider_group_id: str | None = None,
        status: str | None = None,
    ) -> Company:
        if display_name is not None:
            item.display_name = display_name
        if legal_name is not None:
            item.legal_name = legal_name
        if provider_group_id is not None:
            item.provider_group_id = provider_group_id
        if status is not None:
            item.status = status
        self.db.commit()
        self.db.refresh(item)
        return item

    def delete(self, item: Company) -> None:
        self.db.delete(item)
        self.db.commit()