from datetime import datetime

from sqlalchemy import DateTime, String, func
from sqlalchemy.orm import Mapped, mapped_column

from backend.app.core.database import Base


class User(Base):
    """User model for authentication and authorization."""

    __tablename__ = "users"

    id: Mapped[int] = mapped_column(primary_key=True)
    username: Mapped[str] = mapped_column(String(100), unique=True, index=True)
    password_hash: Mapped[str] = mapped_column(String(255))
    role: Mapped[str] = mapped_column(String(20), default="user")  # "admin" or "user"
    is_active: Mapped[bool] = mapped_column(default=True)
    created_at: Mapped[datetime] = mapped_column(DateTime, server_default=func.now())
    updated_at: Mapped[datetime] = mapped_column(DateTime, server_default=func.now(), onupdate=func.now())