import logging
from typing import Optional

import requests
from open_webui.retrieval.web.main import SearchResult, get_filtered_results

log = logging.getLogger(__name__)


def search_searxng(
    query_url: str,
    query: str,
    count: int,
    filter_list: Optional[list[str]] = None,
    **kwargs,
) -> list[SearchResult]:
    """
    Search a SearXNG instance for a given query and return the results as a list of SearchResult objects.

    The function allows passing additional parameters such as language or time_range to tailor the search result.

    Args:
        query_url (str): The base URL of the SearXNG server.
        query (str): The search term or question to find in the SearXNG database.
        count (int): The maximum number of results to retrieve from the search.

    Keyword Args:
        language (str): Language filter for the search results; e.g., "all", "en-US", "es". Defaults to "all".
        safesearch (int): Safe search filter for safer web results; 0 = off, 1 = moderate, 2 = strict. Defaults to 1 (moderate).
        time_range (str): Time range for filtering results by date; e.g., "2023-04-05..today" or "all-time". Defaults to ''.
        categories: (Optional[list[str]]): Specific categories within which the search should be performed, defaulting to an empty string if not provided.

    Returns:
        list[SearchResult]: A list of SearchResults sorted by relevance score in descending order.

    Raise:
        requests.exceptions.RequestException: If a request error occurs during the search process.
    """

    # Default values for optional parameters are provided as empty strings or None when not specified.
    language = kwargs.get('language', 'all')
    safesearch = kwargs.get('safesearch', '1')
    time_range = kwargs.get('time_range', '')
    categories = ''.join(kwargs.get('categories', []))

    params = {
        'q': query,
        'format': 'json',
        'pageno': 1,
        'safesearch': safesearch,
        'language': language,
        'time_range': time_range,
        'categories': categories,
        'theme': 'simple',
        'image_proxy': 0,
    }

    # Legacy query format
    if '<query>' in query_url:
        # Strip all query parameters from the URL
        query_url = query_url.split('?')[0]

    log.debug(f'searching {query_url}')

    response = requests.get(
        query_url,
        headers={
            'User-Agent': 'Open WebUI (https://github.com/open-webui/open-webui) RAG Bot',
            'Accept': 'text/html',
            'Accept-Encoding': 'gzip, deflate',
            'Accept-Language': 'en-US,en;q=0.5',
            'Connection': 'keep-alive',
        },
        params=params,
    )

    response.raise_for_status()  # Raise an exception for HTTP errors.

    json_response = response.json()
    results = json_response.get('results', [])
    sorted_results = sorted(results, key=lambda x: x.get('score', 0), reverse=True)
    if filter_list:
        sorted_results = get_filtered_results(sorted_results, filter_list)
    return [
        SearchResult(link=result['url'], title=result.get('title'), snippet=result.get('content'))
        for result in sorted_results[:count]
    ]