from pydantic import BaseModel, Field
from enum import Enum as PyEnum
from sqlalchemy import ForeignKey, String,Enum as SqlEnum
from sqlalchemy.orm import Mapped, mapped_column, relationship, Session
from app.models.main import Base

class EquipmentTypeEnum(PyEnum):
    SPECIALISED = "Specialised"
    UNIVERSAL = "Universal"

class StoreFormat(PyEnum):
    STORE_FORMAT_A = "Store format A"
    STORE_FORMAT_B = "Store Format B"    

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[StoreFormat] = mapped_column(SqlEnum(StoreFormat, name="store_format_type_enum"), nullable=False)
    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[EquipmentTypeEnum] = mapped_column(SqlEnum(EquipmentTypeEnum, name="equipment_category_enum"), nullable=False)
    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, equipment_id: int, db: Session) -> "TblCommercialEquipment | None":
        return db.query(cls).filter(cls.equipment_id == equipment_id).first()