# -*- coding: utf-8 -*-

from typing import TYPE_CHECKING
from datetime import datetime
from sqlalchemy import Boolean, String, Integer, DateTime, ForeignKey
from sqlalchemy.orm import relationship, Mapped, mapped_column

from app.core.base_model import MappedBase, ModelMixin, UserMixin

if TYPE_CHECKING:
    from app.api.v1.module_system.dept.model import DeptModel
    from app.api.v1.module_system.position.model import PositionModel
    from app.api.v1.module_system.role.model import RoleModel


class UserRolesModel(MappedBase):
    """
    用户角色关联表
    
    定义用户与角色的多对多关系
    """
    __tablename__: str = "sys_user_roles"
    __table_args__: dict[str, str] = ({'comment': '用户角色关联表'})

    user_id: Mapped[int] = mapped_column(
        Integer,
        ForeignKey("sys_user.id", ondelete="CASCADE", onupdate="CASCADE"),
        primary_key=True,
        comment="用户ID"
    )
    role_id: Mapped[int] = mapped_column(
        Integer,
        ForeignKey("sys_role.id", ondelete="CASCADE", onupdate="CASCADE"),
        primary_key=True,
        comment="角色ID"
    )


class UserPositionsModel(MappedBase):
    """
    用户岗位关联表
    
    定义用户与岗位的多对多关系
    """
    __tablename__: str = "sys_user_positions"
    __table_args__: dict[str, str] = ({'comment': '用户岗位关联表'})

    user_id: Mapped[int] = mapped_column(
        Integer,
        ForeignKey("sys_user.id", ondelete="CASCADE", onupdate="CASCADE"),
        primary_key=True,
        comment="用户ID"
    )
    position_id: Mapped[int] = mapped_column(
        Integer,
        ForeignKey("sys_position.id", ondelete="CASCADE", onupdate="CASCADE"),
        primary_key=True,
        comment="岗位ID"
    )


class UserModel(ModelMixin, UserMixin):
    """
    用户模型
    """
    __tablename__: str = "sys_user"
    __table_args__: dict[str, str] = ({'comment': '用户表'})
    __loader_options__: list[str] = ["dept", "roles", "positions", "created_by", "updated_by"]

    username: Mapped[str] = mapped_column(String(32), nullable=False, unique=True, comment="用户名/登录账号")
    password: Mapped[str] = mapped_column(String(255), nullable=False, comment="密码哈希")
    name: Mapped[str] = mapped_column(String(32), nullable=False, comment="昵称")
    mobile: Mapped[str | None] = mapped_column(String(11), nullable=True, unique=True, comment="手机号")
    email: Mapped[str | None] = mapped_column(String(64), nullable=True, unique=True, comment="邮箱")
    gender: Mapped[str | None] = mapped_column(String(1), default='2', nullable=True, comment="性别(0:男 1:女 2:未知)")
    avatar: Mapped[str | None] = mapped_column(String(255), nullable=True, comment="头像URL地址")
    is_superuser: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False, comment="是否超管")
    last_login: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True, comment="最后登录时间")
    
    gitee_login: Mapped[str | None] = mapped_column(String(32), nullable=True, comment="Gitee登录")
    github_login: Mapped[str | None] = mapped_column(String(32), nullable=True, comment="Github登录")
    wx_login: Mapped[str | None] = mapped_column(String(32), nullable=True, comment="微信登录")
    qq_login: Mapped[str | None] = mapped_column(String(32), nullable=True, comment="QQ登录")
    
    dept_id: Mapped[int | None] = mapped_column(
        Integer, 
        ForeignKey('sys_dept.id', ondelete="SET NULL", onupdate="CASCADE"), 
        nullable=True, 
        index=True, 
        comment="部门ID"
    )
    dept: Mapped["DeptModel | None"] = relationship(
        back_populates="users", 
        foreign_keys=[dept_id], 
        lazy="selectin"
    )
    roles: Mapped[list["RoleModel"]] = relationship(
        secondary="sys_user_roles", 
        back_populates="users", 
        lazy="selectin"
    )
    positions: Mapped[list["PositionModel"]] = relationship(
        secondary="sys_user_positions", 
        back_populates="users", 
        lazy="selectin"
    )
    
    # 覆盖 UserMixin 的关系定义,显式指定 foreign_keys 避免自引用混淆
    created_by: Mapped["UserModel | None"] = relationship(
        "UserModel",
        foreign_keys="UserModel.created_id",
        remote_side="UserModel.id",
        lazy="selectin",
        uselist=False,
        viewonly=True  # 防止级联操作
    )
    
    updated_by: Mapped["UserModel | None"] = relationship(
        "UserModel",
        foreign_keys="UserModel.updated_id",
        remote_side="UserModel.id",
        lazy="selectin",
        uselist=False,
        viewonly=True  # 防止级联操作
    )
