from fastapi import HTTPException, status
from sqlalchemy.orm import Session

from .dto import ItemCreate, ItemUpdate
from .models import Item


def get_items(db: Session, tenant_id: int, company_id: int) -> list[Item]:
    return (
        db.query(Item)
        .filter(Item.tenant_id == tenant_id, Item.company_id == company_id, Item.deleted_at.is_(None))
        .all()
    )


def get_item(db: Session, item_id: int, tenant_id: int, company_id: int) -> Item:
    item = (
        db.query(Item)
        .filter(Item.id == item_id, Item.tenant_id == tenant_id, Item.company_id == company_id, Item.deleted_at.is_(None))
        .first()
    )
    if not item:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Item no encontrado")
    return item


def create_item(db: Session, payload: ItemCreate, tenant_id: int, company_id: int) -> Item:
    item = Item(**payload.model_dump(), tenant_id=tenant_id, company_id=company_id)
    db.add(item)
    db.commit()
    db.refresh(item)
    return item


def update_item(db: Session, item_id: int, payload: ItemUpdate, tenant_id: int, company_id: int) -> Item:
    item = get_item(db, item_id, tenant_id, company_id)
    for field, value in payload.model_dump(exclude_unset=True).items():
        setattr(item, field, value)
    db.commit()
    db.refresh(item)
    return item


def delete_item(db: Session, item_id: int, tenant_id: int, company_id: int) -> None:
    item = get_item(db, item_id, tenant_id, company_id)
    from datetime import datetime, timezone
    item.deleted_at = datetime.now(timezone.utc)
    db.commit()