dingdanquanliucheng/backend/app/models/business.py

"""业务核心 ORM 模型。

定义订单管理系统的所有业务数据表，包括客户、产品、供应商、
订单、物流、提醒、文件附件、定价规则等。
"""

from sqlalchemy import Boolean, Date, DateTime, ForeignKey, Integer, Numeric, String, Text, func
from sqlalchemy.orm import Mapped, mapped_column

from backend.app.db import Base
from backend.app.models.base import AuditMixin, TimestampMixin


class Customer(TimestampMixin, AuditMixin, Base):
    """客户表（customer）。

    存储客户基本信息、结算方式、所属业务员、信用额度等。
    支持软删除（AuditMixin.deleted）。
    被调用方: customer_repository、customer_service、order_service
    """
    __tablename__ = "customer"

    id: Mapped[int] = mapped_column(primary_key=True)
    customer_name: Mapped[str] = mapped_column(String(64), index=True)
    mobile: Mapped[str] = mapped_column(String(32), index=True)
    address: Mapped[str | None] = mapped_column(String(255), nullable=True)
    settlement_type: Mapped[str | None] = mapped_column(String(32), nullable=True)
    settlement_days: Mapped[int] = mapped_column(default=0)
    settlement_day_of_month: Mapped[int | None] = mapped_column(Integer, nullable=True)  # 每月几号结算
    reminder_day_of_month: Mapped[int | None] = mapped_column(Integer, nullable=True)  # 每月几号提醒
    customer_type: Mapped[str | None] = mapped_column(String(32), nullable=True)
    price_tier: Mapped[str | None] = mapped_column(String(32), nullable=True, default="default")
    salesman_id: Mapped[int | None] = mapped_column(nullable=True)
    credit_limit: Mapped[float] = mapped_column(Numeric(18, 2), default=0)
    remark: Mapped[str | None] = mapped_column(String(255), nullable=True)


class ProductCategory(TimestampMixin, AuditMixin, Base):
    """产品分类表（product_category）。

    管理产品的一级分类，如"铝板"、"钢材"等。
    category_code 唯一标识，sort_no 控制前端排序。
    """
    __tablename__ = "product_category"

    id: Mapped[int] = mapped_column(primary_key=True)
    category_name: Mapped[str] = mapped_column(String(64))
    category_code: Mapped[str] = mapped_column(String(64), unique=True, index=True)
    sort_no: Mapped[int] = mapped_column(default=0)
    status: Mapped[int] = mapped_column(default=1)
    remark: Mapped[str | None] = mapped_column(String(255), nullable=True)


class Product(TimestampMixin, AuditMixin, Base):
    """产品表（product）。

    存储产品名称、规格、单位、成本价、售价等信息。
    category_id 关联 product_category 表，is_default 标记默认规格。
    被调用方: product_repository、product_service、pricing_engine
    """
    __tablename__ = "product"

    id: Mapped[int] = mapped_column(primary_key=True)
    product_name: Mapped[str] = mapped_column(String(64), index=True)
    specification: Mapped[str] = mapped_column(String(64), default="")
    unit: Mapped[str] = mapped_column(String(32), default="")
    category: Mapped[str | None] = mapped_column(String(64), nullable=True)
    category_id: Mapped[int | None] = mapped_column(ForeignKey("product_category.id"), nullable=True)
    cost_price: Mapped[float] = mapped_column(Numeric(18, 2), default=0)
    sale_price: Mapped[float] = mapped_column(Numeric(18, 2), default=0)
    pricing_type: Mapped[str | None] = mapped_column(String(32), nullable=True)
    pricing_unit: Mapped[str | None] = mapped_column(String(16), nullable=True, default="㎡")
    thickness: Mapped[str | None] = mapped_column(String(32), nullable=True)
    weight_gsm: Mapped[int | None] = mapped_column(Integer, nullable=True)
    default_width_m: Mapped[float | None] = mapped_column(Numeric(10, 4), nullable=True)
    status: Mapped[int] = mapped_column(default=1)
    is_default: Mapped[int] = mapped_column(default=0)
    remark: Mapped[str | None] = mapped_column(String(255), nullable=True)


class Supplier(TimestampMixin, AuditMixin, Base):
    """供应商表（supplier）。

    存储供应商/工厂基本信息，supplier_type 区分"factory"等类型。
    template_type 用于生成发厂文本时选择对应的模板。
    """
    __tablename__ = "supplier"

    id: Mapped[int] = mapped_column(primary_key=True)
    supplier_name: Mapped[str] = mapped_column(String(64), index=True)
    supplier_type: Mapped[str] = mapped_column(String(32), default="factory")
    contact_name: Mapped[str | None] = mapped_column(String(64), nullable=True)
    contact_mobile: Mapped[str | None] = mapped_column(String(32), nullable=True)
    address: Mapped[str | None] = mapped_column(String(255), nullable=True)
    template_type: Mapped[str | None] = mapped_column(String(64), nullable=True)
    status: Mapped[int] = mapped_column(default=1)
    remark: Mapped[str | None] = mapped_column(String(255), nullable=True)


class SalesOrder(TimestampMixin, AuditMixin, Base):
    """销售订单主表（sales_order）。

    订单全流程的核心表，包含客户信息快照、金额汇总、状态流转、
    取消审批、发厂确认等字段。order_status 驱动整个业务流程。
    状态流转（有司机）: draft → pending_approve → approved → pending_driver → accepted → picked_up → pending_logistics → (快递100) → delivered → completed → settled
    状态流转（无司机）: draft → pending_approve → approved → pending_logistics → (快递100) → delivered → completed → settled
    被调用方: order_repository、order_service、reminder_service
    """
    __tablename__ = "sales_order"

    id: Mapped[int] = mapped_column(primary_key=True)
    order_no: Mapped[str] = mapped_column(String(64), unique=True, index=True)
    customer_id: Mapped[int | None] = mapped_column(ForeignKey("customer.id"), nullable=True)
    customer_name: Mapped[str] = mapped_column(String(64))
    customer_mobile: Mapped[str] = mapped_column(String(32))
    customer_address: Mapped[str | None] = mapped_column(String(255), nullable=True)
    salesman_id: Mapped[int | None] = mapped_column(nullable=True)
    order_status: Mapped[str] = mapped_column(String(32), index=True, default="draft")
    order_source: Mapped[str | None] = mapped_column(String(64), nullable=True)
    delivery_type: Mapped[str | None] = mapped_column(String(64), nullable=True)
    factory_id: Mapped[int | None] = mapped_column(ForeignKey("supplier.id"), nullable=True)
    contract_amount: Mapped[float] = mapped_column(Numeric(18, 2), default=0)
    sale_price_total: Mapped[float] = mapped_column(Numeric(18, 2), default=0)
    cost_price_total: Mapped[float] = mapped_column(Numeric(18, 2), default=0)
    rebate_total: Mapped[float] = mapped_column(Numeric(18, 2), default=0)
    freight_total: Mapped[float] = mapped_column(Numeric(18, 2), default=0)
    tax_total: Mapped[float] = mapped_column(Numeric(18, 2), default=0)
    other_fee_total: Mapped[float] = mapped_column(Numeric(18, 2), default=0)
    profit_total: Mapped[float] = mapped_column(Numeric(18, 2), default=0)
    profit_rate: Mapped[float] = mapped_column(Numeric(18, 2), default=0)
    commission_amount: Mapped[float] = mapped_column(Numeric(18, 2), default=0)
    cancel_requested_by: Mapped[int | None] = mapped_column(nullable=True)
    cancel_requested_at: Mapped[DateTime | None] = mapped_column(DateTime, nullable=True)
    cancel_reason: Mapped[str | None] = mapped_column(String(255), nullable=True)
    cancel_opinion: Mapped[str | None] = mapped_column(Text, nullable=True)
    cancel_previous_status: Mapped[str | None] = mapped_column(String(32), nullable=True)
    supplier_text_confirmed_at: Mapped[DateTime | None] = mapped_column(DateTime, nullable=True)
    supplier_text_confirmed_by: Mapped[int | None] = mapped_column(nullable=True)
    payment_method: Mapped[str | None] = mapped_column(String(64), nullable=True)
    tax_amount: Mapped[float] = mapped_column(Numeric(18, 2), default=0)
    need_invoice: Mapped[int] = mapped_column(Integer, default=0)
    order_type: Mapped[str | None] = mapped_column(String(32), nullable=True)  # industry/daily
    self_delivery: Mapped[int] = mapped_column(Integer, default=0)
    tracking_number: Mapped[str | None] = mapped_column(String(128), nullable=True)
    express_company: Mapped[str | None] = mapped_column(String(64), nullable=True)
    customer_demand: Mapped[str | None] = mapped_column(Text, nullable=True)
    remark: Mapped[str | None] = mapped_column(Text, nullable=True)


class SalesOrderItem(TimestampMixin, AuditMixin, Base):
    """订单明细行表（sales_order_item）。

    每个订单包含多条明细，记录产品、数量、单价、面积、附加费用等。
    pricing_type 区分按面积/按重量等计价方式。
    被调用方: order_repository、order_service
    """
    __tablename__ = "sales_order_item"

    id: Mapped[int] = mapped_column(primary_key=True)
    order_id: Mapped[int] = mapped_column(ForeignKey("sales_order.id"), index=True)
    product_id: Mapped[int | None] = mapped_column(nullable=True)
    product_name: Mapped[str] = mapped_column(String(64))
    specification: Mapped[str] = mapped_column(String(64), default="")
    unit: Mapped[str] = mapped_column(String(32), default="")
    quantity: Mapped[float] = mapped_column(Numeric(18, 4), default=0)
    sale_price: Mapped[float] = mapped_column(Numeric(18, 2), default=0)
    cost_price: Mapped[float] = mapped_column(Numeric(18, 2), default=0)
    rebate_amount: Mapped[float] = mapped_column(Numeric(18, 2), default=0)
    freight_amount: Mapped[float] = mapped_column(Numeric(18, 2), default=0)
    tax_amount: Mapped[float] = mapped_column(Numeric(18, 2), default=0)
    other_fee_amount: Mapped[float] = mapped_column(Numeric(18, 2), default=0)
    pricing_type: Mapped[str | None] = mapped_column(String(32), nullable=True)
    length_m: Mapped[float | None] = mapped_column(Numeric(10, 4), nullable=True)
    width_m: Mapped[float | None] = mapped_column(Numeric(10, 4), nullable=True)
    area_sqm: Mapped[float | None] = mapped_column(Numeric(18, 4), nullable=True)
    surcharge_detail: Mapped[str | None] = mapped_column(Text, nullable=True)
    processing_detail: Mapped[str | None] = mapped_column(Text, nullable=True)
    supplier_id: Mapped[int | None] = mapped_column(ForeignKey("supplier.id"), nullable=True)
    supplier_model: Mapped[str | None] = mapped_column(String(64), nullable=True)
    price_tier: Mapped[str | None] = mapped_column(String(32), nullable=True)
    remark: Mapped[str | None] = mapped_column(String(255), nullable=True)
    demand_specification: Mapped[str | None] = mapped_column(String(128), nullable=True)


class SalesOrderApproveLog(TimestampMixin, AuditMixin, Base):
    """订单审批日志表（sales_order_approve_log）。

    记录每次审批操作的结果（通过/驳回）、审批前后状态、审批意见。
    approve_type 区分"order"（订单审批）和"cancel_order"（取消审批）。
    被调用方: order_service
    """
    __tablename__ = "sales_order_approve_log"

    id: Mapped[int] = mapped_column(primary_key=True)
    order_id: Mapped[int] = mapped_column(ForeignKey("sales_order.id"), index=True)
    approve_type: Mapped[str] = mapped_column(String(32), default="order")
    approve_result: Mapped[str] = mapped_column(String(32))
    before_status: Mapped[str | None] = mapped_column(String(32), nullable=True)
    after_status: Mapped[str | None] = mapped_column(String(32), nullable=True)
    approve_opinion: Mapped[str | None] = mapped_column(Text, nullable=True)
    operator_id: Mapped[int | None] = mapped_column(nullable=True)


class OrderSupplierTextLog(TimestampMixin, AuditMixin, Base):
    """发厂文本日志表（order_supplier_text_log）。

    记录为供应商生成的发厂文本内容及确认状态。
    confirmed 标记工厂是否已确认文本内容。
    被调用方: order_service
    """
    __tablename__ = "order_supplier_text_log"

    id: Mapped[int] = mapped_column(primary_key=True)
    order_id: Mapped[int] = mapped_column(ForeignKey("sales_order.id"), index=True)
    supplier_id: Mapped[int] = mapped_column(ForeignKey("supplier.id"), index=True)
    template_type: Mapped[str | None] = mapped_column(String(64), nullable=True)
    text_content: Mapped[str] = mapped_column(Text)
    confirmed: Mapped[int] = mapped_column(default=0)
    confirmed_by: Mapped[int | None] = mapped_column(nullable=True)
    confirmed_at: Mapped[DateTime | None] = mapped_column(DateTime, nullable=True)
    created_by: Mapped[int | None] = mapped_column(nullable=True)


class LogisticsTask(TimestampMixin, AuditMixin, Base):
    """物流任务表（logistics_task）。

    记录每个订单的物流配送任务，包含取货/送货地址、司机、
    快递单号、任务状态等。status: pending → accepted → picked_up → delivered。
    被调用方: logistics_repository、logistics_service、reminder_service
    """
    __tablename__ = "logistics_task"

    id: Mapped[int] = mapped_column(primary_key=True)
    task_no: Mapped[str | None] = mapped_column(String(64), nullable=True, unique=True)
    order_id: Mapped[int] = mapped_column(ForeignKey("sales_order.id"), index=True)
    driver_id: Mapped[int] = mapped_column(index=True)
    factory_id: Mapped[int | None] = mapped_column(ForeignKey("supplier.id"), nullable=True)
    pickup_address: Mapped[str] = mapped_column(String(255))
    delivery_address: Mapped[str] = mapped_column(String(255))
    pickup_content: Mapped[str] = mapped_column(String(255))
    quantity: Mapped[float] = mapped_column(Numeric(18, 4), default=0)
    status: Mapped[str] = mapped_column(String(32), default="pending")
    tracking_number: Mapped[str | None] = mapped_column(String(64), nullable=True)
    express_company: Mapped[str | None] = mapped_column(String(32), nullable=True)
    created_by: Mapped[int | None] = mapped_column(nullable=True)
    canceled_by: Mapped[int | None] = mapped_column(nullable=True)
    cancel_reason: Mapped[str | None] = mapped_column(String(255), nullable=True)
    remark: Mapped[str | None] = mapped_column(String(255), nullable=True)


class LogisticsTrace(Base):
    """物流轨迹表（logistics_trace）。

    记录物流节点的时间、描述、类型、数据来源平台。
    支持从快递100等第三方平台同步轨迹数据。
    """
    __tablename__ = "logistics_trace"

    id: Mapped[int] = mapped_column(primary_key=True)
    order_id: Mapped[int] = mapped_column(ForeignKey("sales_order.id"), index=True)
    task_id: Mapped[int | None] = mapped_column(ForeignKey("logistics_task.id"), nullable=True, index=True)
    node_time: Mapped[DateTime] = mapped_column(DateTime)
    node_desc: Mapped[str] = mapped_column(String(500))
    node_type: Mapped[str | None] = mapped_column(String(64), nullable=True)
    source_platform: Mapped[str | None] = mapped_column(String(64), nullable=True)
    remark: Mapped[str | None] = mapped_column(String(255), nullable=True)
    created_at: Mapped[DateTime] = mapped_column(DateTime, server_default=func.now())


class FileAttachment(Base):
    """文件附件表（file_attachment）。

    通用文件关联表，通过 biz_type + biz_id 关联任意业务对象。
    存储文件 URL、类型、大小、阿里云 OSS 存储信息等。
    被调用方: file_repository、file_service
    """
    __tablename__ = "file_attachment"

    id: Mapped[int] = mapped_column(primary_key=True)
    biz_type: Mapped[str] = mapped_column(String(64), index=True)
    biz_id: Mapped[int] = mapped_column(index=True)
    file_name: Mapped[str] = mapped_column(String(255))
    file_url: Mapped[str] = mapped_column(String(1000))
    file_type: Mapped[str | None] = mapped_column(String(64), nullable=True)
    file_size: Mapped[int | None] = mapped_column(nullable=True)
    created_by: Mapped[int | None] = mapped_column(nullable=True)
    created_at: Mapped[DateTime] = mapped_column(DateTime, server_default=func.now())
    storage_provider: Mapped[str | None] = mapped_column(String(32), nullable=True, default="aliyun_oss")
    bucket_name: Mapped[str | None] = mapped_column(String(128), nullable=True)
    object_key: Mapped[str | None] = mapped_column(String(1000), nullable=True)
    content_type: Mapped[str | None] = mapped_column(String(128), nullable=True)
    file_ext: Mapped[str | None] = mapped_column(String(32), nullable=True)
    file_category: Mapped[str | None] = mapped_column(String(32), nullable=True)


class CustomerArrears(Base):
    """客户欠款表（customer_arrears）。

    记录客户未结清的欠款信息，包括欠款金额、账期起始日、到期日。
    status: pending → overdue，超期后触发提醒。
    被调用方: reminder_repository、reminder_service
    """
    __tablename__ = "customer_arrears"

    id: Mapped[int] = mapped_column(primary_key=True)
    customer_id: Mapped[int] = mapped_column(ForeignKey("customer.id"), index=True)
    order_id: Mapped[int] = mapped_column(ForeignKey("sales_order.id"), index=True)
    arrears_amount: Mapped[float] = mapped_column(Numeric(18, 2), default=0)
    settlement_start_date: Mapped[Date | None] = mapped_column(Date, nullable=True)
    due_date: Mapped[Date | None] = mapped_column(Date, nullable=True)
    status: Mapped[str] = mapped_column(String(32), default="pending")
    reminded_at: Mapped[DateTime | None] = mapped_column(DateTime, nullable=True)
    created_at: Mapped[DateTime] = mapped_column(DateTime, server_default=func.now())


class SystemReminder(Base):
    """系统提醒表（system_reminder）。

    存储系统自动生成的提醒消息，如物流超时、欠款逾期、沉默客户等。
    reminder_type 区分提醒类型，receiver_user_id 指定接收人。
    status: pending → read。
    被调用方: reminder_repository、reminder_service
    """
    __tablename__ = "system_reminder"

    id: Mapped[int] = mapped_column(primary_key=True)
    reminder_type: Mapped[str] = mapped_column(String(64), index=True)
    biz_type: Mapped[str] = mapped_column(String(64), index=True)
    biz_id: Mapped[int] = mapped_column(index=True)
    receiver_user_id: Mapped[int] = mapped_column(index=True)
    reminder_title: Mapped[str] = mapped_column(String(255))
    reminder_content: Mapped[str] = mapped_column(String(2000))
    status: Mapped[str] = mapped_column(String(32), default="pending")
    sent_at: Mapped[DateTime | None] = mapped_column(DateTime, nullable=True)
    created_at: Mapped[DateTime] = mapped_column(DateTime, server_default=func.now())


class AIRecognitionLog(Base):
    """AI 识别日志表（ai_recognition_log）。

    记录 AI 图片识别的原始结果、置信度、人工修正结果。
    用于 AI 识别功能的结果追踪和模型优化。
    被调用方: ai_repository、ai_service
    """
    __tablename__ = "ai_recognition_log"

    id: Mapped[int] = mapped_column(primary_key=True)
    biz_type: Mapped[str] = mapped_column(String(64), index=True)
    biz_id: Mapped[int] = mapped_column(index=True)
    image_url: Mapped[str] = mapped_column(String(1000))
    raw_result: Mapped[str | None] = mapped_column(Text, nullable=True)
    confidence: Mapped[float | None] = mapped_column(Numeric(10, 4), nullable=True)
    corrected_result: Mapped[str | None] = mapped_column(Text, nullable=True)
    created_by: Mapped[int | None] = mapped_column(nullable=True)
    created_at: Mapped[DateTime] = mapped_column(DateTime, server_default=func.now())


class ProductPricingRule(TimestampMixin, AuditMixin, Base):
    """产品定价规则表（product_pricing_rule）。

    定义每个产品的计价方式（按面积/按重量）、基准单价、
    计算公式、附加费用等。被 pricing_engine 在创建订单时调用。
    """
    __tablename__ = "product_pricing_rule"

    id: Mapped[int] = mapped_column(primary_key=True)
    product_id: Mapped[int] = mapped_column(unique=True, index=True)
    product_name: Mapped[str] = mapped_column(String(128))
    pricing_type: Mapped[str] = mapped_column(String(32), default="area")
    base_unit_price: Mapped[float] = mapped_column(Numeric(18, 4), default=0)
    pricing_unit: Mapped[str] = mapped_column(String(16), default="㎡")
    pricing_inputs: Mapped[str | None] = mapped_column(Text, nullable=True)
    formula_expr: Mapped[str | None] = mapped_column(Text, nullable=True)
    formula_constants: Mapped[str | None] = mapped_column(Text, nullable=True)
    surcharge_json: Mapped[str | None] = mapped_column(Text, nullable=True)
    formula_note: Mapped[str | None] = mapped_column(Text, nullable=True)
    tax_rate: Mapped[float] = mapped_column(Numeric(5, 2), default=0)
    tax_inclusive: Mapped[int] = mapped_column(default=0)
    status: Mapped[int] = mapped_column(default=1)


class SupplierProductCost(TimestampMixin, AuditMixin, Base):
    """供应商产品成本表（supplier_product_cost）。

    记录每个供应商对每个产品的成本价格，支持按厚度、克重等维度定价。
    is_primary 标记主供应商。被 pricing_engine 在计算订单成本时调用。
    """
    __tablename__ = "supplier_product_cost"

    id: Mapped[int] = mapped_column(primary_key=True)
    product_id: Mapped[int] = mapped_column(index=True)
    supplier_id: Mapped[int] = mapped_column(index=True)
    supplier_model: Mapped[str | None] = mapped_column(String(64), nullable=True)
    our_model: Mapped[str | None] = mapped_column(String(64), nullable=True)
    thickness: Mapped[str | None] = mapped_column(String(32), nullable=True)
    weight_gsm: Mapped[int | None] = mapped_column(Integer, nullable=True)
    base_fabric_weight: Mapped[int | None] = mapped_column(Integer, nullable=True)
    cost_price: Mapped[float] = mapped_column(Numeric(18, 4))
    cost_unit: Mapped[str] = mapped_column(String(16), default="㎡")
    is_primary: Mapped[int] = mapped_column(default=0)
    remark: Mapped[str | None] = mapped_column(String(255), nullable=True)
    status: Mapped[int] = mapped_column(default=1)


class ProductPriceTier(TimestampMixin, AuditMixin, Base):
    """产品价格层级表（product_price_tier）。

    定义产品的多级价格体系（如普通客户价、VIP客户价）。
    tier_code 区分层级，前端根据客户的价格层级选择对应售价。
    """
    __tablename__ = "product_price_tier"

    id: Mapped[int] = mapped_column(primary_key=True)
    product_id: Mapped[int] = mapped_column(index=True)
    tier_code: Mapped[str] = mapped_column(String(32))
    tier_name: Mapped[str] = mapped_column(String(64))
    price: Mapped[float] = mapped_column(Numeric(18, 4))
    price_unit: Mapped[str] = mapped_column(String(16), default="㎡")
    remark: Mapped[str | None] = mapped_column(String(255), nullable=True)
    status: Mapped[int] = mapped_column(default=1)


class LogisticsWaybill(TimestampMixin, AuditMixin, Base):
    """物流运单号表（logistics_waybill）。

    记录一个物流任务关联的多个运单号（一票货分多件场景）。
    通过 task_id 关联 logistics_task，order_id 冗余关联 sales_order。
    被调用方: logistics_repository、logistics_service
    """
    __tablename__ = "logistics_waybill"

    id: Mapped[int] = mapped_column(primary_key=True)
    task_id: Mapped[int] = mapped_column(ForeignKey("logistics_task.id"), index=True)
    order_id: Mapped[int] = mapped_column(ForeignKey("sales_order.id"), index=True)
    tracking_number: Mapped[str] = mapped_column(String(64), index=True)
    express_company: Mapped[str | None] = mapped_column(String(32), nullable=True)
    express_name: Mapped[str | None] = mapped_column(String(64), nullable=True)
    image_url: Mapped[str | None] = mapped_column(String(1000), nullable=True)
    ocr_raw: Mapped[str | None] = mapped_column(Text, nullable=True)
    status: Mapped[str] = mapped_column(String(32), default="pending")
    created_by: Mapped[int | None] = mapped_column(nullable=True)


class PerformanceStatCache(Base):
    """业绩统计缓存表（performance_stat_cache）。

    存储业绩统计结果缓存，避免重复查询数据库。
    created_at 超过 24 小时视为过期。
    """
    __tablename__ = "performance_stat_cache"

    id: Mapped[int] = mapped_column(primary_key=True)
    stat_type: Mapped[str] = mapped_column(String(16), index=True)
    stat_period: Mapped[str] = mapped_column(String(32), index=True)
    category_id: Mapped[int | None] = mapped_column(nullable=True)
    order_count: Mapped[int] = mapped_column(Integer, default=0)
    order_amount: Mapped[float] = mapped_column(Numeric(18, 2), default=0)
    commission_amount: Mapped[float] = mapped_column(Numeric(18, 2), default=0)
    total_profit: Mapped[float] = mapped_column(Numeric(18, 2), default=0)
    category_amounts_json: Mapped[str | None] = mapped_column(Text, nullable=True)
    created_at: Mapped[DateTime] = mapped_column(DateTime, server_default=func.now())