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

class CriticalBusinessBase(BaseModel):
    critical_id : int | None = Field(default=None)
    rank : int | None = Field(default=None)
    name : str | None = Field(default=None)
    rational_for_selection : str | None = Field(default=None)
    assessment_period : str | None = Field(default=None)
    benchmark_value : str | None = Field(default=None)
    why_to_improve : str | None = Field(default=None)
    group_id : int | None = Field(default=None)

class TblCriticalBusiness(Base):
    __tablename__ = "tbl_critical_business"
    critical_id : Mapped[int] = mapped_column("critical_id", Integer, autoincrement=True, primary_key=True)
    rank : Mapped[int] = mapped_column("rank", Integer, autoincrement=True, nullable=True)
    name : Mapped[str] = mapped_column("name", Text, nullable=True, server_default=None)
    rational_for_selection : Mapped[str] = mapped_column("rational_for_selection", Text, nullable=True, server_default=None)
    assessment_period : Mapped[str] = mapped_column("assessment_period", Enum("1 Month","3 Months","6 Months","12 Months"))
    benchmark_value : Mapped[str] = mapped_column("benchmark_value", Text, nullable=True, server_default=None)
    why_to_improve : Mapped[str] = mapped_column("why_to_improve", Text, nullable=True, server_default=None)
    group_id : Mapped[int] = mapped_column("group_id", ForeignKey("tbl_group.group_id"))
    
    group = relationship("TblGroup", back_populates="critical_for_business")
    
    @classmethod
    def create(cls, data:CriticalBusinessBase, db:Session) ->"TblCriticalBusiness":
        create_data = cls(**data.model_dump())
        db.add(create_data)
        db.flush()
        return create_data
    
    @classmethod
    def get(cls, group_id:int, db:Session) ->"TblCriticalBusiness":
        get_data = db.query(cls).filter(cls.group_id == group_id).all()
        return get_data
    
    @classmethod
    def update(cls, critical_id:int, data:CriticalBusinessBase, db:Session) ->"TblCriticalBusiness":
        update_data = db.query(cls).filter(cls.critical_id == critical_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(cls, critical_id:int, db:Session) ->"TblCriticalBusiness":
        delete_data = db.query(cls).filter(cls.critical_id == critical_id).first()
        if not delete_data:
            return False
        db.delete(delete_data)
        db.commit()
        return delete_data