"""耗材模型

管理耗材基础信息：名称、单位、单价、供应商等
"""

from typing import Optional

from sqlalchemy import String, Boolean, DECIMAL
from sqlalchemy.orm import Mapped, mapped_column

from app.models.base import BaseModel


class Material(BaseModel):
    """耗材表"""
    
    __tablename__ = "materials"
    
    material_code: Mapped[str] = mapped_column(
        String(50),
        unique=True,
        nullable=False,
        index=True,
        comment="耗材编码"
    )
    material_name: Mapped[str] = mapped_column(
        String(100),
        nullable=False,
        comment="耗材名称"
    )
    unit: Mapped[str] = mapped_column(
        String(20),
        nullable=False,
        comment="单位（支/ml/个）"
    )
    unit_price: Mapped[float] = mapped_column(
        DECIMAL(12, 2),
        nullable=False,
        comment="单价"
    )
    supplier: Mapped[Optional[str]] = mapped_column(
        String(100),
        nullable=True,
        comment="供应商"
    )
    material_type: Mapped[str] = mapped_column(
        String(20),
        nullable=False,
        index=True,
        comment="类型：consumable-耗材, injectable-针剂, product-产品"
    )
    is_active: Mapped[bool] = mapped_column(
        Boolean,
        nullable=False,
        default=True,
        comment="是否启用"
    )