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

class DisplayBoardBase(BaseModel):
    display_board_id : int | None = Field(default=None)
    type : str | None = Field(default=None)
    size : int | None = Field(default=None)
    cost_per_unit : int | None = Field(default=None)
    units : int | None = Field(default=None)
    total : int | None = Field(default=None)
    remark : str | None = Field(default=None)
    store_formate_type : Literal["Store Formate A", "Store Formate B"] = "Store Formate A"
    group_id : int | None = Field(default=None)


class TblDisplayBoard(Base):
    __tablename__ = "tbl_displayboard"
    
    display_board_id : Mapped[int] = mapped_column("display_board_id", Integer, primary_key=True, autoincrement=True)
    type : Mapped[str] = mapped_column("type", VARCHAR(255), nullable=True, server_default=None)
    size : Mapped[int] = mapped_column("size", Integer, nullable=True, server_default=None)
    cost_per_unit : Mapped[int]	= mapped_column("cost_per_unit", Integer, nullable=True, server_default=None)
    units : Mapped[int] = mapped_column("units", Integer, nullable=True, server_default=None)
    total : Mapped[int] = mapped_column("total", Integer, nullable=True, server_default=None)
    remark : Mapped[str] = mapped_column("remark", VARCHAR(255), nullable=True, server_default=None)
    store_formate_type : Mapped[str] = mapped_column(Enum("Store Formate A", "Store Formate B") )
    group_id: Mapped[int] = mapped_column(Integer, ForeignKey("tbl_group.group_id"), nullable=False)
    
    group = relationship("TblGroup", back_populates="display_board")
    
    @classmethod
    def create(cls, data: DisplayBoardBase, db: Session) ->"TblDisplayBoard":
        data_dict = data.model_dump()
        new_data = cls(**data_dict)
        db.add(new_data)
        db.flush()
        return new_data
    
    @classmethod
    def get_by_display_board_data(cls, display_get_id:int, db: Session) ->"TblDisplayBoard":
        get_data = db.query(cls).filter(cls.display_board_id == display_get_id).first()
        return get_data
    

    @classmethod
    def update_display_board(cls, display_board_update_id: int, data: DisplayBoardBase,db:Session) ->"TblDisplayBoard":
        update_data = db.query(cls).filter(cls.display_board_id == display_board_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_display_board(cls, display_board_delete_id: int, db: Session) ->"TblDisplayBoard":
        delete_data = db.query(cls).filter(cls.display_board_id == display_board_delete_id).first()
        if not delete_data:
            return False
        db.delete(delete_data)
        db.commit()
        return True