from pydantic import BaseModel, Field
from app.models.base_class import Base
from sqlalchemy.orm import Mapped,mapped_column,relationship,Session
from sqlalchemy import ForeignKey, Integer,VARCHAR, Enum

class LocationSpillageFactorBase(BaseModel):
    location_id : int | None = Field(default=None)
    estimated_spillage_factor : str | None = Field(default=None)
    assumptions : str | None = Field(default=None)
    group_id : int | None = Field(default=None)
    

class TblLocationSpillageFactor(Base):
    __tablename__ = "tbl_location_spillage_factor"
    location_id : Mapped[int] = mapped_column("location_id", Integer, primary_key=True, autoincrement=True)
    estimated_spillage_factor : Mapped[str] = mapped_column("estimated_spillage_factor", Enum("Low", "Medium","High"))
    assumptions : Mapped[str] = mapped_column("assumptions", VARCHAR(250), nullable=True, server_default=None)
    group_id : Mapped[int] = mapped_column("group_id", ForeignKey("tbl_group.group_id"))
    
    group = relationship("TblGroup", back_populates="location_spillage_factor")
    
    @classmethod
    def create_location(cls, data:LocationSpillageFactorBase, db:Session) ->"TblLocationSpillageFactor":
        data_dict = cls(**data.model_dump())
        db.add(data_dict)
        db.flush()
        return data_dict
    
    
    @classmethod
    def get_location(cls, group_id:int, db:Session) ->"TblLocationSpillageFactor":
        get_data = db.query(cls).filter(cls.group_id == group_id).all()
        return get_data
    
    @classmethod
    def update_location(cls, update_id:int, data:LocationSpillageFactorBase, db:Session) ->"TblLocationSpillageFactor":
        update_data = db.query(cls).filter(cls.location_id == update_id).first()
        data_dict = data.model_dump()
        for key, value in data_dict.items():
            if value is not None:
                setattr(update_data, key, value)
        db.commit()
        db.refresh(update_data)
        return update_data
    
    @classmethod
    def delete_location(cls, location_id:int, db:Session) ->"TblLocationSpillageFactor":
        delete_data = db.query(cls).filter(cls.location_id == location_id).first()
        if not delete_data:
            return False
        db.delete(delete_data)
        db.commit()
        return delete_data