from typing import Optional

from pydantic import BaseModel, EmailStr, Field


class UserBase(BaseModel):
    """
    Base user schema with common attributes.
    """
    username: str = Field(..., description="Username for login")
    email: EmailStr = Field(..., description="User's email address")
    full_name: Optional[str] = Field(None, description="User's full name")
    is_active: bool = Field(True, description="Whether the user is active")
    is_superuser: bool = Field(False, description="Whether the user has admin privileges")


class UserCreate(UserBase):
    """
    Schema for user creation with password.
    """
    password: str = Field(..., description="User's password")


class UserUpdate(BaseModel):
    """
    Schema for updating user information.
    """
    username: Optional[str] = Field(None, description="Username for login")
    email: Optional[EmailStr] = Field(None, description="User's email address")
    full_name: Optional[str] = Field(None, description="User's full name")
    password: Optional[str] = Field(None, description="User's password")
    is_active: Optional[bool] = Field(None, description="Whether the user is active")
    is_superuser: Optional[bool] = Field(None, description="Whether the user has admin privileges")


class UserInDBBase(UserBase):
    """
    Base schema for users from the database.
    """
    id: int = Field(..., description="User ID")

    class Config:
        from_attributes = True


class User(UserInDBBase):
    """
    Schema for user information returned to clients.
    """
    pass


class UserInDB(UserInDBBase):
    """
    Schema for user in database including hashed password.
    """
    hashed_password: str = Field(..., description="Hashed password")