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

class PrivateLabllingBase(BaseModel):
    
    private_id : int | None = Field(default=None)
    category_name : str | None = Field(default=None)
    private_label : Literal["Yes", "No"]
    rational : str | None = Field(default=None)
    group_id : int | None = Field(default=None)

class TblPrivateLablling(Base):
    
    __tablename__ = "tbl_private_lablling"
    
    private_id : Mapped[int] = mapped_column("private_id", Integer, primary_key=True, autoincrement=True)
    category_name : Mapped[str] = mapped_column("category_name", VARCHAR(255), nullable=True, server_default=None)
    private_label : Mapped[str] = mapped_column(Enum("Yes", "No"), nullable=True)
    rational : Mapped[str] = mapped_column("rational", VARCHAR(255), nullable=True, server_default=None)
    group_id : Mapped[int] = mapped_column("group_id", Integer, ForeignKey("tbl_group.group_id"))
    
    group = relationship("TblGroup", back_populates="private_lablling")
    
    @classmethod
    def create_private_lablling(cls, data:PrivateLabllingBase, db:Session) ->"TblPrivateLablling":
        data_dict = data.model_dump()
        new_data = cls(**data_dict)
        db.add(new_data)
        db.flush()
        return new_data
    
    @classmethod
    def get_private_lablling(cls, private_get_id:int, db:Session) ->"TblPrivateLablling":
        get_data = db.query(cls).filter(cls.private_id == private_get_id).first()
        return get_data
    
    @classmethod
    def update_private_lablling(cls, private_update_id:int, data:PrivateLabllingBase, db:Session) ->"TblPrivateLablling":
        update_data = db.query(cls).filter(cls.private_id == private_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_private_lablling(cls, private_id:int, db:Session) ->"TblPrivateLablling":
        delete_data = db.query(cls).filter(cls.private_id == private_id).first()
        if not delete_data:
            return False
        db.delete(delete_data)
        db.commit()
        return True