"""
User schemas for request/response validation.
"""
from datetime import datetime
from pydantic import BaseModel, EmailStr


class UserBase(BaseModel):
    username: str


class UserCreate(UserBase):
    """Input schema — strict EmailStr validation for user-supplied email."""
    email: EmailStr
    password: str


class UserResponse(UserBase):
    """Response schema — email is serialised as-is from DB (no re-validation)."""
    id: int
    email: str
    created_at: datetime

    class Config:
        from_attributes = True