from datetime import datetime
from pydantic import BaseModel, ConfigDict, Field
from typing import Optional


class UserCreate(BaseModel):
    username: str = Field(..., min_length=2, max_length=50)
    display_name: str = Field(..., min_length=1, max_length=100)
    password: str = Field(..., min_length=6)
    email: Optional[str] = None
    phone: Optional[str] = None
    role: str = Field(default="developer", pattern="^(admin|dba|developer|guest)$")


class UserUpdate(BaseModel):
    display_name: Optional[str] = None
    email: Optional[str] = None
    phone: Optional[str] = None
    role: Optional[str] = Field(default=None, pattern="^(admin|dba|developer|guest)$")
    is_active: Optional[bool] = None


class UserResponse(BaseModel):
    id: int
    username: str
    display_name: str
    email: Optional[str] = None
    phone: Optional[str] = None
    role: str
    is_active: bool
    last_login: Optional[datetime] = None
    created_at: datetime

    model_config = ConfigDict(from_attributes=True)


class PasswordChange(BaseModel):
    old_password: str
    new_password: str = Field(..., min_length=6)