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

class BookBase(BaseModel):
    title: str = Field(..., description="Book title")
    author: str = Field(..., description="Book author")
    description: Optional[str] = Field(None, description="Book description")
    page_count: Optional[int] = Field(None, description="Number of pages")
    published_date: Optional[datetime] = Field(None, description="Publication date")
    genre_id: str = Field(..., description="ID of the book genre")

    class Config:
        schema_extra = {
            "example": {
                "title": "The Great Gatsby",
                "author": "F. Scott Fitzgerald",
                "description": "A classic American novel about the Roaring Twenties.",
                "page_count": 180,
                "published_date": "1925-04-10T00:00:00",
                "genre_id": "c1a2b3c4-d5e6-f7g8-h9i0-j1k2l3m4n5o6"
            }
        }

class BookCreate(BookBase):
    pass

class BookResponse(BookBase):
    id: str

    class Config:
        orm_mode = True