from datetime import datetime
from typing import Optional

from pydantic import BaseModel, EmailStr, model_validator


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

# Properties to receive via API on creation
class UserCreate(UserBase):
    email: EmailStr
    username: str
    password: str

    @model_validator(mode="after")
    def validate_username(self):
        username = self.username
        if len(username) < 3:
            raise ValueError("Username must be at least 3 characters long")
        return self

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

# Properties shared by models stored in DB
class UserInDBBase(UserBase):
    id: int
    created_at: datetime
    updated_at: Optional[datetime] = None

    class Config:
        from_attributes = True

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

# Additional properties stored in DB
class UserInDB(UserInDBBase):
    hashed_password: str