from datetime import datetime
from typing import Optional

from pydantic import BaseModel, EmailStr, Field, validator


# Shared properties
class UserBase(BaseModel):
    email: Optional[EmailStr] = None
    username: Optional[str] = None
    is_active: Optional[bool] = True
    is_superuser: Optional[bool] = False
    first_name: Optional[str] = None
    last_name: Optional[str] = None


# Properties to receive via API on creation
class UserCreate(UserBase):
    email: EmailStr
    username: str
    password: str = Field(..., min_length=8)

    @validator("username")
    def username_alphanumeric(cls, v):
        assert v.isalnum(), "Username must be alphanumeric"
        return v


# Properties to receive via API on update
class UserUpdate(UserBase):
    password: Optional[str] = Field(None, min_length=8)


# Database model properties
class UserInDBBase(UserBase):
    id: Optional[int] = None
    created_at: Optional[datetime] = None
    updated_at: Optional[datetime] = None

    class Config:
        orm_mode = True


# Additional properties to return via API
class User(UserInDBBase):
    pass


# Additional properties stored in DB but not returned by API
class UserInDB(UserInDBBase):
    hashed_password: str