"""
用戶與角色資料模型
"""
from datetime import datetime
from sqlalchemy import String, Boolean, ForeignKey, Text, Enum as SQLEnum
from sqlalchemy.orm import Mapped, mapped_column, relationship
from typing import Optional, List
import enum

from app.db.session import Base


class AuthType(str, enum.Enum):
    """認證類型"""
    AD = "ad"
    LOCAL = "local"


class Role(Base):
    """角色表"""
    __tablename__ = "roles"
    
    id: Mapped[int] = mapped_column(primary_key=True, autoincrement=True)
    code: Mapped[str] = mapped_column(String(20), unique=True, nullable=False, comment="角色代碼")
    name: Mapped[str] = mapped_column(String(50), nullable=False, comment="角色名稱")
    description: Mapped[Optional[str]] = mapped_column(String(200), comment="角色描述")
    created_at: Mapped[datetime] = mapped_column(default=datetime.utcnow)
    updated_at: Mapped[datetime] = mapped_column(default=datetime.utcnow, onupdate=datetime.utcnow)
    
    # 關聯
    users: Mapped[List["User"]] = relationship(back_populates="role")


class User(Base):
    """用戶表"""
    __tablename__ = "users"
    
    id: Mapped[int] = mapped_column(primary_key=True, autoincrement=True)
    username: Mapped[str] = mapped_column(String(50), unique=True, nullable=False, index=True, comment="用戶帳號")
    password_hash: Mapped[Optional[str]] = mapped_column(String(255), comment="密碼雜湊")
    display_name: Mapped[str] = mapped_column(String(100), nullable=False, comment="顯示名稱")
    email: Mapped[Optional[str]] = mapped_column(String(100), comment="電子郵件")
    auth_type: Mapped[AuthType] = mapped_column(SQLEnum(AuthType), default=AuthType.LOCAL, nullable=False, comment="認證類型")
    role_id: Mapped[int] = mapped_column(ForeignKey("roles.id"), nullable=False, comment="角色ID")
    is_active: Mapped[bool] = mapped_column(Boolean, default=True, comment="是否啟用")
    last_login_at: Mapped[Optional[datetime]] = mapped_column(comment="最後登入時間")
    created_at: Mapped[datetime] = mapped_column(default=datetime.utcnow)
    updated_at: Mapped[datetime] = mapped_column(default=datetime.utcnow, onupdate=datetime.utcnow)
    
    # 關聯
    role: Mapped["Role"] = relationship(back_populates="users")
    subscriptions: Mapped[List["Subscription"]] = relationship(back_populates="user", cascade="all, delete-orphan")
    favorites: Mapped[List["Favorite"]] = relationship(back_populates="user", cascade="all, delete-orphan")
    comments: Mapped[List["Comment"]] = relationship(back_populates="user")
    notes: Mapped[List["Note"]] = relationship(back_populates="user", cascade="all, delete-orphan")


# 避免循環引入
from app.models.interaction import Subscription, Favorite, Comment, Note