import enum
import uuid

from sqlalchemy import Boolean, Column, DateTime, Enum, String
from sqlalchemy.sql import func

from app.db.base import Base


class UserRole(str, enum.Enum):
    """Enum for user roles."""
    ADMIN = "admin"
    CUSTOMER = "customer"
    STAFF = "staff"


class User(Base):
    """User model."""
    __tablename__ = "users"

    id = Column(String, primary_key=True, index=True, default=lambda: str(uuid.uuid4()))
    email = Column(String, unique=True, index=True, nullable=False)
    username = Column(String, unique=True, index=True, nullable=False)
    hashed_password = Column(String, nullable=False)
    full_name = Column(String, nullable=True)
    role = Column(Enum(UserRole), default=UserRole.CUSTOMER, nullable=False)
    is_active = Column(Boolean, default=True)
    
    # Audit timestamps
    created_at = Column(DateTime(timezone=True), server_default=func.now(), nullable=False)
    updated_at = Column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now(), nullable=False)