from __future__ import annotations
import enum
import uuid
from datetime import datetime, timezone
from sqlalchemy import Boolean, DateTime, Enum, String
from sqlalchemy.orm import Mapped, mapped_column
from .base import Base


class UserRole(str, enum.Enum):
    admin = "admin"
    operator = "operator"
    viewer = "viewer"


class User(Base):
    __tablename__ = "users"

    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
    username: Mapped[str] = mapped_column(String(64), unique=True, nullable=False)
    email: Mapped[str] = mapped_column(String(255), unique=True, nullable=False)
    password_hash: Mapped[str] = mapped_column(String(255), nullable=False)
    role: Mapped[UserRole] = mapped_column(Enum(UserRole), nullable=False, default=UserRole.viewer)
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, default=lambda: datetime.now(timezone.utc)
    )
    is_active: Mapped[bool] = mapped_column(Boolean, nullable=False, default=True)