from typing import Optional
from fastapi import HTTPException
from pydantic import BaseModel, Field
from sqlalchemy import VARCHAR,ForeignKey
from sqlalchemy.orm import Mapped, Session, mapped_column, relationship
from app.models.main import Base

class PreOperatingExpenseBase(BaseModel):
    pre_operating_id : int | None = Field(default=None)
    group_id: int | None = Field(default=None)
    pre_operating_months_store_a: int | None = Field(default=None)
    pre_operating_months_store_b: int | None = Field(default=None)
    marketing_expenses_store_a: int | None = Field(default=None)
    marketing_expenses_store_b: int | None = Field(default=None)
    accounting_benefits_store_a: str | None = Field(default=None)
    accounting_benefits_store_b: str | None = Field(default=None)
    other_remarks_store_a: str | None = Field(default=None)
    other_remarks_store_b: str | None = Field(default=None)

class TblPreOperatingExpense(Base):
    __tablename__ = "tbl_pre_operating_expense"

    pre_operating_id: Mapped[int] = mapped_column(primary_key=True, autoincrement=True)
    group_id: Mapped[int] = mapped_column(ForeignKey("tbl_group.group_id"), nullable=False)
    pre_operating_months_store_a: Mapped[int] = mapped_column(nullable=False)
    pre_operating_months_store_b: Mapped[int] = mapped_column(nullable=False)
    marketing_expenses_store_a: Mapped[int] = mapped_column(nullable=False)
    marketing_expenses_store_b: Mapped[int] = mapped_column(nullable=False)
    accounting_benefits_store_a: Mapped[Optional[str]] = mapped_column(VARCHAR(200), nullable=True)
    accounting_benefits_store_b: Mapped[Optional[str]] = mapped_column(VARCHAR(200), nullable=True)
    other_remarks_store_a: Mapped[Optional[str]] = mapped_column(VARCHAR(200), nullable=True)
    other_remarks_store_b: Mapped[Optional[str]] = mapped_column(VARCHAR(200), nullable=True)

    group = relationship("TblGroup", back_populates="pre_operating_expense")

    @classmethod
    def create(cls, data: PreOperatingExpenseBase, db: Session) -> "TblPreOperatingExpense":
        data_dict = data.model_dump()
        new_data = cls(**data_dict)
        db.add(new_data)
        db.flush()
        return new_data
    
    @classmethod
    def get_trading(cls, pre_operating_id: int, db: Session) -> "TblPreOperatingExpense | None":
        return db.query(cls).filter(cls.pre_operating_id == pre_operating_id).first()
    
    @classmethod
    def get_by_group_id(cls, group_id: int, db: Session) -> "TblPreOperatingExpense":
        trading = db.query(cls).filter(cls.group_id == group_id).all()
        if not trading:
            raise HTTPException(status_code=404, detail="Pre Operating Expense not found for this Group")
        return trading
    
    @classmethod
    def update(cls, pre_operating_id: int, data: PreOperatingExpenseBase, db: Session) -> "TblPreOperatingExpense | None":
        get_data = db.query(cls).filter(cls.pre_operating_id == pre_operating_id).first()
        if not get_data:
            return None  
        data_dict = data.model_dump()
        for key, value in data_dict.items():
            if value is not None:
                setattr(get_data, key, value)
        db.commit()
        db.refresh(get_data)
        return get_data
    
    @classmethod
    def delete(cls, pre_operating_id:int, db:Session) ->"TblPreOperatingExpense":
        delete_data = db.query(cls).filter(cls.pre_operating_id == pre_operating_id).first()
        if not delete_data:
            return False
        db.delete(delete_data)
        db.commit()
        return delete_data