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

class ExpandedPerformanceBase(BaseModel):
    expanded_id : int | None = Field(default=None)
    name_of_kpi : str | None = Field(default=None)
    rational_for_selection : str | None = Field(default=None)
    expected_output : str | None = Field(default=None)
    group_id : int | None = Field(default=None)

class TblExpandedPerformance(Base):
    __tablename__ = "tbl_expanded_performance"
    expanded_id : Mapped[int] = mapped_column("expanded_id", Integer, primary_key=True, autoincrement=True)
    name_of_kpi : Mapped[str] = mapped_column("name_of_kpi", Text, nullable=True, server_default=None)
    rational_for_selection : Mapped[str] = mapped_column("rational_for_selection", Text, nullable=True, server_default=None)
    expected_output : Mapped[str] = mapped_column("expected_output", Text, nullable=True, server_default=None)
    group_id : Mapped[int] = mapped_column("group_id", Integer, ForeignKey("tbl_group.group_id"))
    
    group = relationship("TblGroup", back_populates="expanded_performance_metrics")
    
    @classmethod
    def create(cls, data:ExpandedPerformanceBase, db:Session) ->"TblExpandedPerformance":
        create_data = cls(**data.model_dump())
        db.add(create_data)
        db.flush()
        return create_data
    
    @classmethod
    def get(cls, group_id:int, db:Session) ->"TblExpandedPerformance":
        get_data = db.query(cls).filter(cls.group_id == group_id).all()
        return get_data
    
    @classmethod
    def update(cls, expanded_id:int, data:ExpandedPerformanceBase, db:Session) ->"TblExpandedPerformance":
        update_data = db.query(cls).filter(cls.expanded_id == expanded_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, expanded_id:int, db:Session) ->"TblExpandedPerformance":
        delete_data = db.query(cls).filter(cls.expanded_id == expanded_id).first()
        if not delete_data:
            return False
        db.delete(delete_data)
        db.commit()
        return delete_data