from fastapi import HTTPException
from pydantic import BaseModel, Field
from sqlalchemy import ForeignKey, String,Enum
from sqlalchemy.orm import Mapped, mapped_column, relationship, Session
from app.models.main import Base
  
class CommercialEquipmentBase(BaseModel):
    equipment_id: int | None = Field(default=None)
    group_id: int | None = Field(default=None)
    store_format_type: str | None = Field(default=None) 
    format_type: str | None = Field(default=None)
    type_of_equipment: str | None = Field(default=None)
    number_of_units: int | None = Field(default=None)
    cost_per_unit: float | None = Field(default=None)
    equipment_category:  str | None = Field(default=None)
    total: float | None = Field(default=None)
    remarks: str | None = Field(default=None)

class TblCommercialEquipment(Base):
    __tablename__ = "tbl_commercial_equipment"

    equipment_id: Mapped[int] = mapped_column(primary_key=True, autoincrement=True)
    group_id: Mapped[int] = mapped_column(ForeignKey("tbl_group.group_id"), nullable=True)
    format_type: Mapped[str] = mapped_column(String(50), nullable=False)
    store_format_type : Mapped[str] = mapped_column("store_format_type", Enum("Store Format A","Store Format B"))
    type_of_equipment: Mapped[str] = mapped_column(String(100), nullable=False)
    number_of_units: Mapped[int] = mapped_column(nullable=False)
    cost_per_unit: Mapped[float] = mapped_column(nullable=False)
    equipment_category: Mapped[str] = mapped_column("equipment_category", Enum("Specialised", "Universal"))
    total: Mapped[float] = mapped_column(nullable=False)
    remarks: Mapped[str] = mapped_column(String(100), nullable=False)

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

    @property
    def total_cost(self) -> float:
        return self.number_of_units * self.cost_per_unit

    @classmethod
    def create(cls, data: CommercialEquipmentBase, db: Session) -> "TblCommercialEquipment":
        data_dict = data.model_dump()
        new_entry = cls(**data_dict)
        db.add(new_entry)
        db.flush()
        return new_entry
    
    @classmethod
    def get_by_id(cls, group_id: int, db: Session) -> "TblCommercialEquipment | None":
        return db.query(cls).filter(cls.group_id == group_id).all()
    
    @classmethod
    def update(cls, equipment_id:int, data:CommercialEquipmentBase, db:Session) ->"TblCommercialEquipment":
        update_data = db.query(cls).filter(cls.equipment_id == equipment_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, equipment_id:int, db:Session) ->"TblCommercialEquipment":
        delete_data = db.query(cls).filter(cls.equipment_id == equipment_id).first()
        if not delete_data:
            return False
        db.delete(delete_data)
        db.commit()
        return delete_data