main.py

import httpx
from fastapi import FastAPI, HTTPException, Query
from typing import Optional

# Initialize the FastAPI app
app = FastAPI(
    title="FastAPI DuckDuckGo Lite Proxy",
    description="A FastAPI proxy for the DuckDuckGo Lite search engine.",
    version="1.0.0",
)

# Define the base URL for the DuckDuckGo Lite API
DUCKDUCKGO_LITE_URL = "https://lite.duckduckgo.com/lite/"

@app.get("/search", tags=["Search"])
async def search_duckduckgo(
    q: str = Query(..., description="The search query."),
    s: Optional[int] = Query(0, description="Can be `0`."),
    o: Optional[str] = Query("json", description="Set to `json` for JSON output."),
    kl: Optional[str] = Query("wt-wt", description="Region, e.g., us-en, uk-en."),
    bing_market: Optional[str] = Query("wt-wt", description="Bing market region.")
):
    """
    Performs a search using the DuckDuckGo Lite API and returns the results.
    """
    params = {
        "q": q,
        "s": s,
        "o": o,
        "kl": kl,
        "bing_market": bing_market,
    }

    # Use httpx for asynchronous requests
    async with httpx.AsyncClient() as client:
        try:
            # The OpenAPI spec indicates a POST, but parameters are in the query.
            # A GET request is more appropriate for a search with query parameters.
            response = await client.get(DUCKDUCKGO_LITE_URL, params=params)
            
            # Raise an exception for bad status codes (4xx or 5xx)
            response.raise_for_status()
            
            # Return the JSON response from the API
            return response.json()

        except httpx.HTTPStatusError as e:
            raise HTTPException(
                status_code=e.response.status_code,
                detail=f"Error from DuckDuckGo API: {e.response.text}",
            )
        except httpx.RequestError as e:
            raise HTTPException(
                status_code=500,
                detail=f"Failed to connect to DuckDuckGo API: {str(e)}",
            )

# Optional: Add a root endpoint for health checks or basic info
@app.get("/", tags=["Root"])
async def read_root():
    return {"message": "Welcome to the DuckDuckGo Lite API proxy!"}