from datetime import datetime
from typing import Optional

from pydantic import BaseModel, ConfigDict, Field


class LoginRequest(BaseModel):
    username: str = Field(..., min_length=1, max_length=64)
    password: str = Field(..., min_length=1)


class TokenResponse(BaseModel):
    access_token: str
    token_type: str = "bearer"
    expires_in: int


class UserOut(BaseModel):
    model_config = ConfigDict(from_attributes=True)
    id: int
    username: str
    is_admin: bool
    is_active: bool
    created_at: datetime


class ChangePasswordRequest(BaseModel):
    old_password: str = Field(..., min_length=1)
    new_password: str = Field(..., min_length=8)


class MessageResponse(BaseModel):
    message: str
    detail: Optional[str] = None