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 RentExpensesBase(BaseModel):
    rent_id : int | None = Field(default=None)
    rental_advance_amount : int | None = Field(default=None)
    rental_advance_period : int | None = Field(default=None)
    rent_per_month : int | None = Field(default=None)
    store_formate_type : Literal["Store Formate A", "Store Formate B"]
    rational_for_rental_expenses : str | None = Field(default=None)
    group_id : int | None = Field(default=None)

class TblRentExpenses(Base):
    __tablename__ = "tbl_rent_expenses"
    
    rent_id : Mapped[int] = mapped_column("rent_id", Integer, primary_key=True, autoincrement=True)
    store_size : Mapped[int] = mapped_column("store_size", Integer, nullable=True, server_default=None)
    rental_advance_amount : Mapped[int] = mapped_column("rental_advance_amount", Integer, nullable=True, server_default=None)
    rental_advance_period : Mapped[int] = mapped_column("rental_advance_period", Integer, nullable=True, server_default=None)
    rent_per_month : Mapped[int] = mapped_column("rent_per_month", Integer, nullable=True, server_default=None)
    store_formate_type : Mapped[str] = mapped_column(Enum("Store Formate A", "Store Formate B"))
    rational_for_rental_expenses : Mapped[str] = mapped_column("rational_for_rental_expenses", VARCHAR(255), nullable=True, server_default=None)
    group_id : Mapped[int] = mapped_column("group_id", ForeignKey("tbl_group.group_id"))
    
    group = relationship("TblGroup", back_populates="rent_expenses")
    
    @classmethod
    def create_rent_expenses(cls, data:RentExpensesBase, db:Session) ->"TblRentExpenses":
        data_dict = data.model_dump()
        new_data = cls(**data_dict)
        db.add(new_data)
        db.flush()
        return new_data
    
    @classmethod
    def get_rent_expenses(cls, rent_get_id:int, db:Session) ->"TblRentExpenses":
        get_data = db.query(cls).filter(cls.rent_id == rent_get_id).first()
        return get_data
    
    @classmethod
    def update_rent_expenses(cls, rent_update_id:int, data:RentExpensesBase, db:Session) ->"TblRentExpenses":
        update_data = db.query(cls).filter(cls.rent_id == rent_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_rent_expenses(cls, group_id:int, db:Session) ->"TblRentExpenses":
        delete_data = db.query(cls).filter(cls.group_id == group_id).all()
        if not delete_data:
            return False
        for delete in delete_data:
            db.delete(delete)
            db.commit()
        return True