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

class VisualMerchStrategyBase(BaseModel):
    
    visual_id : int | None = Field(default=None)
    internal_display_remark : str | None = Field(default=None)
    external_display_remark : str | None = Field(default=None)
    Frequency_change_per_year : int | None = Field(default=None)
    Frequency_change_per_year_remark : str | None = Field(default=None)
    group_id : int | None = Field(default=None)
    
class TblVisualMerchStrategy(Base):
    
    __tablename__ = "tbl_visual_merch_strategy"
    
    visual_id : Mapped[int] = mapped_column("visual_id", Integer, primary_key=True, autoincrement=True)
    internal_display_remark : Mapped[str] = mapped_column("internal_display_remark", VARCHAR(255), nullable=True, server_default=None)
    external_display_remark : Mapped[str] = mapped_column("external_display_remark", VARCHAR(255), nullable=True, server_default=None)
    Frequency_change_per_year : Mapped[int] = mapped_column("Frequency_change_per_year", Integer, nullable=True, server_default=None)
    Frequency_change_per_year_remark : Mapped[str] = mapped_column("Frequency_change_per_year_remark", VARCHAR(255), nullable=True, server_default=None)
    group_id : Mapped[int] = mapped_column("group", ForeignKey("tbl_group.group_id"))
    
    group = relationship("TblGroup", back_populates="visual_merchandising_strategy")
    
    @classmethod
    def create(cls, data:VisualMerchStrategyBase, db:Session) ->"TblVisualMerchStrategy":
        new_data = cls(**data.model_dump())
        db.add(new_data)
        db.flush()
        return new_data
    
    @classmethod
    def get(cls, group_id:int, db:Session) ->"TblVisualMerchStrategy":
        get_data = db.query(cls).filter(cls.group_id == group_id).all()
        return get_data
    
    @classmethod
    def update(cls, visual_id:int, data:VisualMerchStrategyBase, db:Session) ->"TblVisualMerchStrategy":
        update_data = db.query(cls).filter(cls.visual_id == visual_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, visual_id:int, db:Session) ->"TblVisualMerchStrategy":
        delete_data = db.query(cls).filter(cls.visual_id == visual_id).first()
        if not delete_data:
            return False
        db.delete(delete_data)
        db.commit()
        return True