from collections.abc import Generator
from typing import Any

import requests

from dify_plugin import Tool
from dify_plugin.entities.tool import ToolInvokeMessage

SERP_API_URL = "https://serpapi.com/search"


class GoogleSearchTool(Tool):
    def _parse_response(self, response: dict) -> dict:
        result = {}
        if "knowledge_graph" in response:
            result["title"] = response["knowledge_graph"].get("title", "")
            result["description"] = response["knowledge_graph"].get("description", "")
        if "organic_results" in response:
            result["organic_results"] = [
                {
                    "title": item.get("title", ""),
                    "link": item.get("link", ""),
                    "snippet": item.get("snippet", ""),
                }
                for item in response["organic_results"]
            ]
        return result

    def _invoke(self, tool_parameters: dict[str, Any]) -> Generator[ToolInvokeMessage]:
        params = {
            "api_key": self.runtime.credentials["serpapi_api_key"],
            "q": tool_parameters["query"],
            "engine": "google",
            "google_domain": "google.com",
            "gl": "us",
            "hl": "en",
        }

        response = requests.get(url=SERP_API_URL, params=params, timeout=5)
        response.raise_for_status()
        valuable_res = self._parse_response(response.json())

        yield self.create_json_message(valuable_res)