"""服务项目模型

管理医美服务项目基础信息
"""

from typing import Optional, List, TYPE_CHECKING

from sqlalchemy import BigInteger, String, Boolean, Integer, Text, ForeignKey
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.models.base import BaseModel

if TYPE_CHECKING:
    from app.models.category import Category
    from app.models.user import User
    from app.models.project_cost_item import ProjectCostItem
    from app.models.project_labor_cost import ProjectLaborCost
    from app.models.project_cost_summary import ProjectCostSummary
    from app.models.pricing_plan import PricingPlan


class Project(BaseModel):
    """服务项目表"""
    
    __tablename__ = "projects"
    
    project_code: Mapped[str] = mapped_column(
        String(50),
        unique=True,
        nullable=False,
        index=True,
        comment="项目编码"
    )
    project_name: Mapped[str] = mapped_column(
        String(100),
        nullable=False,
        comment="项目名称"
    )
    category_id: Mapped[Optional[int]] = mapped_column(
        BigInteger,
        ForeignKey("categories.id"),
        nullable=True,
        index=True,
        comment="项目分类ID"
    )
    description: Mapped[Optional[str]] = mapped_column(
        Text,
        nullable=True,
        comment="项目描述"
    )
    duration_minutes: Mapped[int] = mapped_column(
        Integer,
        nullable=False,
        default=0,
        comment="操作时长（分钟）"
    )
    is_active: Mapped[bool] = mapped_column(
        Boolean,
        nullable=False,
        default=True,
        index=True,
        comment="是否启用"
    )
    created_by: Mapped[Optional[int]] = mapped_column(
        BigInteger,
        ForeignKey("users.id"),
        nullable=True,
        comment="创建人ID"
    )
    
    # 关系
    category: Mapped[Optional["Category"]] = relationship(
        "Category",
        back_populates="projects"
    )
    creator: Mapped[Optional["User"]] = relationship(
        "User",
        back_populates="created_projects"
    )
    
    # 成本相关关系
    cost_items: Mapped[List["ProjectCostItem"]] = relationship(
        "ProjectCostItem",
        back_populates="project",
        cascade="all, delete-orphan"
    )
    labor_costs: Mapped[List["ProjectLaborCost"]] = relationship(
        "ProjectLaborCost",
        back_populates="project",
        cascade="all, delete-orphan"
    )
    cost_summary: Mapped[Optional["ProjectCostSummary"]] = relationship(
        "ProjectCostSummary",
        back_populates="project",
        uselist=False,
        cascade="all, delete-orphan"
    )
    pricing_plans: Mapped[List["PricingPlan"]] = relationship(
        "PricingPlan",
        back_populates="project",
        cascade="all, delete-orphan"
    )