"""
App A Schemas - Pydantic schemas for request/response validation.
"""

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


class UserCreate(BaseModel):
    """Schema for creating a new user."""
    
    username: str = Field(..., min_length=3, max_length=50)
    email: EmailStr
    password: str = Field(..., min_length=6)
    full_name: Optional[str] = Field(None, max_length=100)
    
    class Config:
        json_schema_extra = {
            "example": {
                "username": "john_doe",
                "email": "john@example.com",
                "password": "secret123",
                "full_name": "John Doe",
            }
        }


class UserUpdate(BaseModel):
    """Schema for updating a user."""
    
    email: Optional[EmailStr] = None
    full_name: Optional[str] = Field(None, max_length=100)
    is_active: Optional[bool] = None
    
    class Config:
        json_schema_extra = {
            "example": {
                "email": "newemail@example.com",
                "full_name": "John Smith",
                "is_active": True,
            }
        }


class UserResponse(BaseModel):
    """Schema for user response."""
    
    id: int
    username: str
    email: str
    full_name: Optional[str]
    is_active: bool
    created_at: datetime
    updated_at: datetime
    
    class Config:
        from_attributes = True
        json_schema_extra = {
            "example": {
                "id": 1,
                "username": "john_doe",
                "email": "john@example.com",
                "full_name": "John Doe",
                "is_active": True,
                "created_at": "2024-01-15T10:30:00Z",
                "updated_at": "2024-01-15T10:30:00Z",
            }
        }