# Entity: Book

from fastapi import APIRouter, Depends, HTTPException, status
from sqlalchemy.orm import Session
from app.api.db.database import get_db

router = APIRouter()

@router.get("/api/v1/books")
async def get_books(
    author: str = None,
    title: str = None,
    db: Session = Depends(get_db)
):
    """
    Get all books with optional filtering by author and title.
    """
    query = db.query(Book)
    
    if author:
        query = query.filter(Book.author.ilike(f"%{author}%"))
    
    if title:
        query = query.filter(Book.title.ilike(f"%{title}%"))
    
    books = query.all()
    
    return [
        {
            "id": book.id,
            "title": book.title,
            "author": book.author,
            # Add other book fields as needed
        }
        for book in books
    ]
```

In this implementation, the `get_books` function accepts two optional query parameters: `author` and `title`. It then constructs a SQLAlchemy query on the `Book` model and applies filters based on the provided parameters using the `ilike` operator for case-insensitive pattern matching.

The filtered query is executed, and the results are returned as a list of dictionaries containing the book details. You can adjust the fields included in the dictionary based on your requirements.

Note that this implementation assumes the existence of a `Book` model and the necessary database setup with SQLAlchemy. You'll need to import the `Book` model and any required schemas in the actual implementation.