from datetime import datetime
from typing import Optional
from pydantic import BaseModel, Field


class UserPreferences(BaseModel):
    """User preferences model."""
    notifications: bool = True
    darkMode: bool = True
    theme: str = "dark"


class User(BaseModel):
    """MongoDB User model."""
    id: Optional[str] = Field(default=None, alias="_id")
    name: str
    email: str
    image: Optional[str] = None
    password_hash: str
    preferences: UserPreferences = Field(default_factory=UserPreferences)
    created_at: datetime = Field(default_factory=datetime.utcnow)
    updated_at: datetime = Field(default_factory=datetime.utcnow)

    class Config:
        populate_by_name = True