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

class UtilityBase(BaseModel):
    utility_id : int | None = Field(default=None)
    utility_name : str | None = Field(default=None)
    cost_per_month : float | None = Field(default=None)
    key_usage_parameters : str | None = Field(default=None)
    remark : str | None = Field(default=None)
    store_format_type : str | None = Field(default=None)
    group_id : int | None = Field(default=None)

class TblUtility(Base):
    __tablename__ = "tbl_utility"
    utility_id : Mapped[int] = mapped_column("utility_id", Integer, primary_key=True, autoincrement=True)
    utility_name : Mapped[str] = mapped_column("utility_name", VARCHAR(255), nullable=True, server_default=None)
    cost_per_month : Mapped[float] = mapped_column("cost_per_month", Float, nullable=True, server_default=None)
    key_usage_parameters : Mapped[str] = mapped_column("key_usage_parameters", VARCHAR(255), nullable=True, server_default=None)
    remark : Mapped[str] = mapped_column("remark", VARCHAR(255), nullable=True, server_default=None)
    store_format_type : Mapped[str] = mapped_column("store_format_type", Enum("Store Formate A", "Store Formate B"))
    group_id : Mapped[int] = mapped_column("group_id", ForeignKey("tbl_group.group_id"))
    
    group = relationship("TblGroup", back_populates="utility")
    
    @classmethod
    def create_utility(cls, data:UtilityBase, db:Session) ->"TblUtility":
        data_dict = data.model_dump()
        new_data = cls(**data_dict)
        db.add(new_data)
        db.flush()
        return new_data
    
    @classmethod
    def get_utility(cls, group_id:int, db:Session) ->"TblUtility":
        get_data = db.query(cls).filter(cls.group_id == group_id).all()
        return get_data
    
    @classmethod
    def update_utility(cls, data:UtilityBase, utility_update_id:int, db:Session) ->"TblUtility":
        update_data = db.query(cls).filter(cls.utility_id == utility_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_utility(cls, utility_id:int, db:Session) ->"TblUtility":
        delete_data = db.query(cls).filter(cls.utility_id == utility_id).first()
        if not delete_data:
            return False
        db.delete(delete_data)
        db.commit()
        return True